CN113464306B - Method for reducing height of diesel engine and diesel engine - Google Patents
Method for reducing height of diesel engine and diesel engine Download PDFInfo
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- CN113464306B CN113464306B CN202110962687.7A CN202110962687A CN113464306B CN 113464306 B CN113464306 B CN 113464306B CN 202110962687 A CN202110962687 A CN 202110962687A CN 113464306 B CN113464306 B CN 113464306B
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- supercharger
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- cylinder body
- small head
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- 238000000034 method Methods 0.000 title abstract description 11
- 239000003921 oil Substances 0.000 claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 244000309464 bull Species 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/40—Other reciprocating-piston engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a method for reducing the height of a diesel engine, belongs to the field of engines, and solves the problem that a cylinder head cover interferes with a cab when the existing diesel engine is matched with an automobile. The method realizes the height reduction from the optimization of the sizes of a cylinder body, a piston and a connecting rod of the diesel engine, and the size optimization is as follows: (1) a reduction in cylinder height: reducing the height from the center of a crankshaft of the cylinder block to the top surface from 398.2mm to 362.4mm; (2) piston height reduction: the distance from the top surface of the piston to the rotation center of the small end of the connecting rod is reduced from 80.2mm to 58mm; (3) height of the connecting rod is reduced: the distance from the center of the small end of the connecting rod to the center of the large end of the connecting rod is reduced from 241mm to 227.4mm. The method of the invention realizes the reduction of the height of the diesel engine body on the premise of ensuring convenient installation, enough strength and lower cost. The invention also discloses a diesel engine for reducing the height of the engine body. The diesel engine effectively prevents the problem that the cylinder head cover is contacted with the bottom surface of the cab of the whole vehicle.
Description
Technical Field
The present invention relates to engines, and more particularly, to a method for reducing the height of a diesel engine and a diesel engine.
Background
When the K11 diesel engine is matched with a certain model of automobile, after the diesel engine of the model is installed on the whole automobile, the top surface of the cylinder head cover of the diesel engine is contacted with the bottom surface of the cab, and after the diesel engine is used for a long time, the diesel engine is easy to collide and damage. Therefore, how to reduce the height from the diesel engine itself becomes a challenge to be overcome.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and one of the purposes is to provide a method for reducing the height of a diesel engine body, which can reduce the height of the diesel engine body on the premise of ensuring convenient installation, enough strength and lower cost, so that the diesel engine is installed on the whole vehicle in a matching way.
The second purpose is to provide a diesel engine with reduced height of the engine body, which effectively prevents the problem of contact between the cylinder head cover and the bottom surface of the cab of the whole vehicle, and has the characteristics of convenient design and manufacture.
The first technical scheme of the invention is as follows: a method for reducing the height of a diesel engine, which is realized by optimizing the sizes of a cylinder block, a piston and a connecting rod of the diesel engine, wherein the sizes are optimized as follows:
(1) Cylinder body height decreases: reducing the height from the center of a crankshaft of the cylinder block to the top surface from 398.2mm to 362.4mm;
(2) The piston height is reduced: the distance from the top surface of the piston to the rotation center of the small end of the connecting rod is reduced from 80.2mm to 58mm;
(3) The height of the connecting rod is reduced: the distance from the center of the small end of the connecting rod to the center of the large end of the connecting rod is reduced from 241mm to 227.4mm.
The second technical scheme of the invention is as follows: the diesel engine capable of reducing the height of the engine body comprises a cylinder body, a plug connecting rod assembly, a supercharger system, a fan assembly, an air compressor system assembly and a control system assembly, wherein the distance from the center of a crankshaft of the cylinder body to the top surface is 362.4mm, the piston connecting rod assembly comprises a piston and a connecting rod, the connecting rod comprises a small head and a large head, the small head and the large head are connected through a middle rod, the small head is rotationally connected with the piston through a pin shaft, the large head is rotationally connected with the crankshaft in the cylinder body, the distance between the top surface of the piston and the rotation center of the small head is 58mm, and the distance between the center of the small head and the center of the large head is 227.4mm; the fan assembly comprises a fan mounting seat for mounting a fan, wherein the fan mounting seat is mounted right above the crankshaft output end of the cylinder body, and the distance between the axial lead of the fan mounting seat and the axial lead of the crankshaft output end is 240mm.
As a further improvement, chamfer structures are arranged between the two ends of the middle rod and the small head and between the two ends of the middle rod and the large head, the chamfer structures between the middle rod and the small head are all R70mm, and the diameter of the inner wall of the small head is 53mm; the chamfer between middle pole and the bull was including left side chamfer and right side chamfer, the radius of left side chamfer is greater than the radius of right side chamfer, just the inner wall diameter of bull is 95mm.
Further, the small end inner wall seted up the lubrication groove, the lubrication groove include oilhole and arc oil groove, the oilhole run through the small end, the arc oil groove along the inner wall circumference extension of small end, just the arc oil groove with cross the oilhole intercommunication, the end of arc oil groove be equipped with along the oil drain groove of small end axial extension.
Further, the lower side of the oil drain groove is an arc-shaped surface, and two ends of the upper side of the oil drain groove extend along the circumferential arc shape of the small head.
Further, the booster system comprises a booster volute and a booster compressor shell, an air inlet of the booster volute is connected with an air outlet of the booster compressor shell, an air outlet of the booster volute is connected with a turbine rear connecting pipe, an air inlet of the booster compressor shell is connected with a compressor air inlet pipe, a booster oil return pipe and a booster oil inlet pipe are respectively connected to the connecting position between the booster volute and the booster compressor shell, the booster oil return pipe extends downwards and is connected with a cylinder body, and the booster oil inlet pipe firstly horizontally passes through the upper part of the booster compressor shell, then vertically bends downwards, finally extends along the direction vertical to the cylinder body and is connected with the cylinder body.
Further, an exhaust bypass valve is further integrally arranged on the supercharger compressor shell, a bypass valve pipeline is arranged between the exhaust bypass valve and the air outlet of the supercharger compressor shell, one end of the bypass valve pipeline is connected with the air outlet of the supercharger compressor shell, and the other end of the bypass valve pipeline sequentially bypasses the supercharger oil inlet pipe and the air inlet pipe of the compressor to be connected with the exhaust bypass valve.
Further, the air compressor system assembly comprises an air compressor water inlet pipe and an air compressor water return pipe, one end of the air compressor water inlet pipe is connected with an air compressor on one side of the cylinder body, the other end of the air compressor water inlet pipe is bent upwards, then bypasses the upper part of a gear chamber of the cylinder body and extends to the other side of the cylinder body, and finally passes through the outer side of an oil-gas separator oil return pipe to be connected with the cylinder body; one end of the air compressor return pipe is connected with the air compressor on one side of the cylinder body, and the other end of the air compressor return pipe passes through the upper part of the air compressor, then bends upwards, bypasses the upper part of the gear chamber of the cylinder body, extends to the other side of the cylinder body, and finally passes through the inner side of the oil return pipe of the oil-gas separator to be connected with the cylinder body.
Further, the control system assembly comprises an ECU body, an engine wire harness plug-in port and a whole wire harness plug-in port, wherein the engine wire harness plug-in port is positioned at the lower part of the ECU body, the whole wire harness plug-in port is positioned at the upper part of the ECU body, and the engine wire harness plug-in port and the whole wire harness plug-in port are electrically connected with the ECU body.
Further, the axial lead of the piston and the rotation center of the small head are eccentrically arranged, and the eccentric distance between the axial lead of the piston and the rotation center of the small head is 0.5mm.
Advantageous effects
Compared with the prior art, the invention has the following advantages:
1. The method for reducing the height of the diesel engine body provided by the invention has the advantages that the height is reduced by selecting the parts such as the cylinder body, the piston and the connecting rod of the diesel engine, and the height of the diesel engine body is reduced on the premise of ensuring convenient installation, enough strength and lower cost, so that the diesel engine is installed on the whole vehicle in a matched manner.
2. According to the diesel engine capable of reducing the height of the engine body, the height of the cylinder body is reduced, and the piston and the connecting rod are synchronously shortened to match the reduced cylinder body, so that the installation position of the cylinder cover is reduced, the reduction of the whole height of the diesel engine is realized, the problem that the cylinder cover is contacted with the bottom surface of the cab of the whole automobile is effectively prevented, and the diesel engine has the characteristics of convenience in design and manufacture.
Drawings
FIG. 1 is a schematic perspective view of one side of the invention;
FIG. 2 is a schematic diagram of a front view of a piston according to the present invention;
FIG. 3 is a schematic diagram of a front view of a connecting rod according to the present invention;
FIG. 4 is a schematic perspective view of a connecting rod according to the present invention;
FIG. 5 is a schematic side view of the present invention;
FIG. 6 is an enlarged schematic view of the structure shown at A in FIG. 5;
FIG. 7 is an enlarged schematic view of the supercharger system of the present invention;
FIG. 8 is a schematic view of an air compressor assembly according to one aspect of the present invention;
FIG. 9 is a schematic diagram of an air compressor assembly according to another embodiment of the present invention;
FIG. 10 is a schematic diagram of a control system assembly according to one aspect of the present invention;
Fig. 11 is a schematic view of the structure of the present invention when installed.
Wherein: 1-piston, 2-small head, 3-big head, 4-middle rod, 5-sinking groove, 6-oil passing hole, 7-arc oil groove, 8-oil draining groove, 9-cylinder block, 10-fan mounting seat, 11-crankshaft output end, 12-booster volute, 13-booster compressor shell, 14-turbine rear connecting pipe, 15-compressor air inlet pipe, 16-booster oil return pipe, 17-booster oil inlet pipe, 18-exhaust bypass valve, 19-bypass valve pipeline, 20-air compressor water inlet pipe, 21-air compressor water return pipe, 22-air compressor, 23-gear chamber, 24-oil-gas separator oil return pipe, 25-ECU body, 26-engine wire harness plug, 27-whole wire harness plug, 28-V-shaped groove, 29-fixed lug, 30-first reinforcing rib, 31-second reinforcing rib, 32-fixed clamp and 33-girder.
Detailed Description
The invention will be further described with reference to specific embodiments in the drawings.
Referring to fig. 1-11, a method of reducing body height according to the present invention is achieved by optimizing the dimensions of a cylinder block, piston, and connecting rod of a diesel engine, wherein the dimensions are as follows:
(1) Cylinder body height decreases: reducing the height from the center of a crankshaft of the cylinder block to the top surface from 398.2mm to 362.4mm;
(2) The piston height is reduced: the distance from the top surface of the piston to the rotation center of the small end of the connecting rod is reduced from 80.2mm to 58mm;
(3) The height of the connecting rod is reduced: the distance from the center of the small end of the connecting rod to the center of the large end of the connecting rod is reduced from 241mm to 227.4mm.
The method for reducing the height of the diesel engine body provided by the invention has the advantages that the height is reduced by selecting the parts such as the cylinder body, the piston and the connecting rod of the diesel engine, and the height of the diesel engine body is reduced on the premise of ensuring convenient installation, enough strength and lower cost, so that the diesel engine is installed on the whole vehicle in a matched manner.
The diesel engine capable of reducing the height of the engine body comprises a cylinder body 9, a plug connecting rod assembly, a supercharger system, a fan assembly, an air compressor system assembly and a control system assembly, wherein the distance from the center of a crankshaft to the top surface of the cylinder body 9 is 362.4mm, the thickness is reduced from the top surface of the cylinder body 9 to the center direction of the crankshaft, the height of the cylinder body 9 is reduced, the piston connecting rod assembly is arranged in the cylinder body 9 and comprises a piston 1 and a connecting rod, the connecting rod comprises a small end 2 and a large end 3, the small end 2 and the large end 3 are connected through a middle rod 4, the small end 2 is connected with the piston 1 in a rotating mode through a pin shaft, the large end 3 is connected with the crankshaft in the cylinder body 9 in a rotating mode, the distance between the top surface of the piston 1 and the rotating center of the small end 2 is 58mm (shown as H1 in fig. 2), and meanwhile, the structural design and product manufacturing are easy while the structural strength requirement of the piston is met. Preferably, the piston 1 is a steel piston, so that the structural strength of the piston is ensured. The distance between the center of the small end 2 and the center of the large end 3 is 227.4mm (shown as H2 in fig. 2), so that the requirement of the structural strength of the connecting rod is met, and meanwhile, the structural layout and the product manufacturing are easy. According to the piston connecting rod assembly, the distance between the top surface of the piston 1 and the rotation center of the small head 2 is limited to 58mm, and the distance between the center of the small head 2 and the center of the large head 3 is limited to 227.4mm, so that the piston connecting rod assembly can be installed in the cylinder body 9, the compression ratio of a diesel engine is ensured to meet the actual requirement, and the problem that the existing piston connecting rod assembly cannot be installed and matched with the compression ratio after the diesel engine is changed is solved.
Preferably, chamfer structures are arranged between the two ends of the middle rod 4 and the small head 2 and between the middle rod 4 and the large head 3, wherein the chamfer structures between the middle rod 4 and the small head 2 are R70mm (shown as a1 in fig. 3), the problem of interference between the connecting rod and the cylinder block is avoided while the structural strength requirement of the connecting rod is met, and the diameter of the inner wall of the small head 2 is 53mm (shown as d in fig. 3), compared with the conventional small head, the diameter of the small head is increased, so that large clearance fit is formed between the small head 2 and the pin shaft, and smooth rotation of the connecting rod is ensured; the chamfer between the intermediate lever 4 and the big end 3 includes a left chamfer and a right chamfer, wherein the radius of the left chamfer is larger than the radius of the right chamfer, specifically, the left chamfer is R60mm (as shown in a2 of FIG. 3), the right chamfer is R20mm (as shown in a3 of FIG. 3), the connecting rod is prevented from interfering with the cylinder block, and the diameter of the inner wall of the big end 3 is 95mm (as shown in D of FIG. 3), so that the big end 3 is well matched and installed on the crankshaft. According to the piston connecting rod assembly, chamfer structures are arranged between the big end 3 and the small end 2 of the connecting rod and the middle rod 4, so that the problem that the joint of the middle rod and the big end and the small end interferes with a cylinder body after the connecting rod is shortened can be prevented, and the structural strength of the connecting rod can be improved.
Preferably, the sinking grooves 5 are arranged on two sides of the middle rod 4, so that the structural strength of the connecting rod is further improved.
Preferably, the lubricating oil groove is formed in the inner wall of the small head 2, the lubricating oil groove comprises an oil passing hole 6 and an arc-shaped oil groove 7, the oil passing hole 6 penetrates through the small head 2, the arc-shaped oil groove 7 extends along the circumferential direction of the inner wall of the small head 2, the arc-shaped oil groove 7 is communicated with the oil passing hole 6, the tail end of the arc-shaped oil groove 7 is provided with an oil discharging groove 8 extending along the axial direction of the small head 2, lubricating oil enters the arc-shaped oil groove 7 through the oil passing hole 6, lubrication is provided between the small head 2 and a pin shaft, and lubricating oil can be discharged through the oil discharging groove 8.
Preferably, the downside of the oil drain groove 8 is an arc surface, the lubricating oil discharged from the arc oil drain groove 7 can be collected on the downside of the oil drain groove 8 in a short time, the lubricating property can be further improved, the two ends of the upper side of the oil drain groove 8 extend along the circumferential arc of the small head 2, the lubricating oil can slowly circulate along the circumferential direction of the small head 2, and the lubricating property can be further improved.
Preferably, the axial lead of the piston 1 and the rotation center of the small head 2 are eccentrically arranged, and the eccentric distance between the axial lead of the piston 1 and the rotation center of the small head 2 is 0.5mm (shown as K in fig. 2), so that the stress of the connecting rod and the piston 1 can be improved, the friction force between the connecting rod and the piston 1 can be further reduced, and the service life of the connecting rod and the piston is prolonged.
The fan assembly is mounted at one end of the cylinder block 9, the fan assembly includes a fan mount 10 for mounting a fan, the fan mount 10 is mounted right above the crankshaft output end 11 of the cylinder block 9, and the distance between the axis of the fan mount 10 and the axis of the crankshaft output end 11 is 240mm (as shown by H3 in fig. 5). According to the diesel engine fan mounting structure, the distance between the axial lead of the fan mounting seat 10 and the axial lead of the crankshaft output end 11 is limited to 240mm, so that the diesel engine fan mounting structure is 30mm higher than that of a traditional fan mounting seat, the problem that a fan interferes with other parts is avoided, the fan can be conveniently mounted, the stress intensity of the fan is effectively improved, and the problem that the existing fan is easy to interfere with other parts after being mounted is solved.
Preferably, the V-shaped groove 28 is formed at the top of the fan mounting seat 10, so that interference between the fan mounting seat 10 and other parts can be avoided, and structural strength of the fan mounting seat 10 can be improved.
Preferably, a plurality of fixing lugs 29 are arranged on the periphery of the fan mounting seat 10, specifically, the fixing lugs 29 are fixed on four corners of the fan mounting seat 10, the stress is more uniform, and each fixing lug 29 is connected with the cylinder body 9 through a bolt, so that the assembly, disassembly and maintenance are convenient.
Preferably, a first reinforcing rib 30 extending toward the center of the fan mount 10 is provided at one side of each fixing lug 29, thereby improving the structural strength of the fan mount 10. Further, a second reinforcing rib 31 is further provided on the fan mount 10 between two adjacent fixing lugs 29, so as to further improve the structural strength of the fan mount 10.
The supercharger system is arranged on one side of the cylinder body 9 and comprises a supercharger volute 12 and a supercharger compressor shell 13, wherein an air inlet of the supercharger volute 12 is connected with an air outlet of the supercharger compressor shell 13, an air outlet of the supercharger volute 12 is connected with a turbine rear connecting pipe 14, an air inlet of the supercharger compressor shell 13 is connected with a compressor air inlet pipe 15, a supercharger oil return pipe 16 and a supercharger oil inlet pipe 17 are respectively connected with the connection part between the supercharger volute 12 and the supercharger compressor shell 13, the supercharger oil return pipe 16 extends downwards and is connected with the cylinder body 9, and the supercharger oil inlet pipe 17 firstly horizontally passes through the upper part of the supercharger compressor shell 13, then vertically bends downwards, finally extends along the direction vertical to the cylinder body 9 and is connected with the cylinder body 9, so that interference of the supercharger compressor shell 13 and the compressor air inlet pipe 15 is skillfully avoided. The turbocharger compressor shell 13 is also integrally provided with an exhaust bypass valve 18, a bypass valve pipeline 19 is arranged between the exhaust bypass valve 18 and the air outlet of the turbocharger compressor shell 13, one end of the bypass valve pipeline 19 is connected with the air outlet of the turbocharger compressor shell 13, the other end of the bypass valve pipeline sequentially bypasses the turbocharger oil inlet pipe 17 and the compressor air inlet pipe 15 to be connected with the exhaust bypass valve 18, and interference of the turbocharger oil inlet pipe 17 and the compressor air inlet pipe 15 is skillfully avoided.
According to the supercharger system, through redesigning the structures of the supercharger oil inlet pipe 17, the supercharger oil return pipe 16 and the bypass valve pipeline 19, the supercharger oil inlet pipe 17 and the bypass valve pipeline 19 are reasonably inserted among the supercharger compressor shell 13, the compressor air inlet pipe 15, the cylinder body 9 and the like, the problem that the supercharger oil inlet pipe 17, the cylinder body 9, the bypass valve pipeline 19 and the air inlet pipe 15 of the supercharger system interfere can be effectively prevented, the pipeline layout of the supercharger system is reasonably optimized, the installation requirement is met after the height of a diesel engine is reduced, the service life of the supercharger system is effectively prolonged, and the problem that parts and organisms of the existing supercharger system interfere is solved.
The air compressor system assembly is arranged on the cylinder body 9 and comprises an air compressor water inlet pipe 20 and an air compressor water return pipe 21, wherein one end of the air compressor water inlet pipe 20 is connected with an air compressor 22 on one side of the cylinder body 9, and the other end of the air compressor water inlet pipe 20 is firstly bent upwards, then bypasses the upper part of a gear chamber 23 of the cylinder body 9 and extends to the other side of the cylinder body, and finally passes through the outer side of an oil-gas separator oil return pipe 24 to be connected with the cylinder body 9; one end of the air compressor return pipe 21 is connected with an air compressor 22 on one side of the cylinder block 9, and the other end passes through the upper side of the air compressor 22, bends upwards, bypasses the upper side of a gear chamber 23 of the cylinder block 9, extends to the other side of the cylinder block 9, and finally passes through the inner side of an oil-gas separator return pipe 24 to be connected with the cylinder block 9.
According to the air compressor system assembly, the air compressor water inlet pipe 20 and the air compressor water return pipe 21 bypass the upper portion of the gear chamber 23 and are respectively inserted between the inner side and the outer side of the oil-gas separator oil return pipe 24, so that the oil-gas separator oil return pipe 24 is clamped between the air compressor water inlet pipe 20 and the air compressor water return pipe 21, the problem that one pipeline interferes with the oil-gas separator oil return pipe 24 due to the fact that the air compressor water inlet pipe 20 and the air compressor water return pipe 21 are extruded on the inner side of the oil-gas separator oil return pipe 24 is avoided, the layout of the air compressor pipeline is reasonably optimized, the service life of the air compressor pipeline is effectively prolonged, and the problem that the existing air compressor pipeline is easy to interfere is solved.
Preferably, a fixing clamp 32 for fixing the air compressor water inlet pipe 20 and the air compressor water return pipe 21 together is arranged on one side, close to the air compressor 22, of the cylinder body 9, and at least two fixing clamps 32 for fixing the air compressor water inlet pipe 20 and the air compressor water return pipe 21 together are arranged on the cylinder body 9 above the gear chamber 23 correspondingly, the air compressor water inlet pipe 20 and the air compressor water return pipe 21 are fixed together through the fixing clamps 32 and are jointly fixed on the cylinder body 9, so that the pipeline is prevented from shaking due to vibration of a diesel engine, the connection reliability of the pipeline is further improved, and the service life of the pipeline is prolonged.
The control system assembly comprises an ECU body 25, an engine wire harness plug-in port 26 and a whole wire harness plug-in port 27, wherein the engine wire harness plug-in port 26 is positioned at the lower part of the ECU body 25, the whole wire harness plug-in port 27 is positioned at the upper part of the ECU body 25, and the engine wire harness plug-in port 26 and the whole wire harness plug-in port 27 are electrically connected with the ECU body 25.
According to the control system assembly, the whole wire harness inserting port 27 is adjusted from the lower part to the upper part, so that the whole wire harness inserting port 27 is higher than the girder 33 of the whole vehicle, a user can directly insert the whole wire harness into the whole wire harness inserting port 27, the mounting difficulty of the whole wire harness can be reduced, the whole wire harness can be quickly mounted, the addition of transition wires is omitted, the cost is further reduced, and the problem that the mounting of the whole wire harness of an ECU is inconvenient after the traditional diesel engine is mounted on the whole vehicle is solved.
While only the preferred embodiments of the present invention have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these do not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (4)
1. The diesel engine capable of reducing the height of the engine body is characterized by comprising a cylinder block (9), a piston connecting rod assembly, a supercharger system, a fan assembly, an air compressor system assembly and a control system assembly, wherein the distance from the center of a crankshaft of the cylinder block (9) to the top surface is 362.4mm, the piston connecting rod assembly comprises a piston (1) and a connecting rod, the connecting rod comprises a small head (2) and a large head (3), the small head (2) and the large head (3) are connected through a middle rod (4), the small head (2) is rotationally connected with the piston (1) through a pin shaft, the large head (3) is rotationally connected with the crankshaft in the cylinder block (9), the distance between the top surface of the piston (1) and the rotation center of the small head (2) is 58mm, and the distance between the center of the small head (2) and the center of the large head (3) is 227.4mm; the fan assembly comprises a fan mounting seat (10) for mounting a fan, the fan mounting seat (10) is mounted right above a crankshaft output end (11) of the cylinder block (9), and the distance between the axial lead of the fan mounting seat (10) and the axial lead of the crankshaft output end (11) is 240mm;
The lubricating oil groove is formed in the inner wall of the small head (2), the lubricating oil groove comprises an oil passing hole (6) and an arc-shaped oil groove (7), the oil passing hole (6) penetrates through the small head (2), the arc-shaped oil groove (7) circumferentially extends along the inner wall of the small head (2), the arc-shaped oil groove (7) is communicated with the oil passing hole (6), an oil drain groove (8) axially extending along the small head (2) is formed in the tail end of the arc-shaped oil groove (7), the lower side surface of the oil drain groove (8) is an arc-shaped surface, and two ends of the upper side surface of the oil drain groove (8) circumferentially and arcuately extend along the small head (2);
The air compressor system assembly comprises an air compressor water inlet pipe (20) and an air compressor water return pipe (21), wherein one end of the air compressor water inlet pipe (20) is connected with an air compressor (22) on one side of a cylinder body (9), the other end of the air compressor water inlet pipe is firstly bent upwards, then bypasses the upper part of a gear chamber (23) of the cylinder body (9) and extends to the other side of the cylinder body, and finally passes through the outer side of the oil-gas separator water return pipe (24) to be connected with the cylinder body (9); one end of the air compressor return pipe (21) is connected with an air compressor (22) on one side of the cylinder body (9), and the other end of the air compressor return pipe passes through the upper part of the air compressor (22) and then bends upwards, then bypasses a gear chamber (23) of the cylinder body (9) and extends to the other side of the cylinder body (9), and finally passes through the inner side of an oil-gas separator return pipe (24) to be connected with the cylinder body (9);
The supercharger system comprises a supercharger volute (12) and a supercharger compressor shell (13), wherein an air inlet of the supercharger volute (12) is connected with an air outlet of the supercharger compressor shell (13), an air outlet of the supercharger volute (12) is connected with a turbine rear connecting pipe (14), an air inlet of the supercharger compressor shell (13) is connected with a compressor air inlet pipe (15), a supercharger oil return pipe (16) and a supercharger oil inlet pipe (17) are respectively connected at the connecting position between the supercharger volute (12) and the supercharger compressor shell (13), the supercharger oil return pipe (16) extends downwards and is connected with a cylinder body (9), and the supercharger oil inlet pipe (17) horizontally penetrates through the upper part of the supercharger compressor shell (13), then bends downwards vertically and extends in the direction vertical to the cylinder body (9) and is connected with the cylinder body (9);
The control system assembly comprises an ECU body (25), an engine wire harness plug-in port (26) and a whole wire harness plug-in port (27), wherein the engine wire harness plug-in port (26) is located at the lower part of the ECU body (25), the whole wire harness plug-in port (27) is located at the upper part of the ECU body (25), and the engine wire harness plug-in port (26) and the whole wire harness plug-in port (27) are electrically connected with the ECU body (25).
2. The diesel engine for reducing the height of the engine body according to claim 1, wherein chamfer structures are arranged between two ends of the middle rod (4) and the small head (2) and between two ends of the middle rod and the large head (3), the chamfer structures between the middle rod (4) and the small head (2) are R70mm, and the diameter of the inner wall of the small head (2) is 53mm; the chamfer between middle pole (4) and bull (3) includes left side chamfer and right side chamfer, the radius of left side chamfer is greater than the radius of right side chamfer, just the inner wall diameter of bull (3) is 95mm.
3. The diesel engine capable of reducing the height of a diesel engine according to claim 1, wherein an exhaust bypass valve (18) is further integrated on the supercharger compressor housing (13), a bypass valve pipeline (19) is arranged between the exhaust bypass valve (18) and an air outlet of the supercharger compressor housing (13), one end of the bypass valve pipeline (19) is connected with the air outlet of the supercharger compressor housing (13), and the other end of the bypass valve pipeline (19) sequentially bypasses a supercharger oil inlet pipe (17) and a compressor air inlet pipe (15) to be connected with the exhaust bypass valve (18).
4. A diesel engine with reduced engine height according to any of claims 1-3, characterized in that the axis of the piston (1) is arranged eccentrically to the centre of rotation of the small head (2) and that the eccentric distance of the axis of the piston (1) to the centre of rotation of the small head (2) is 0.5mm.
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