CN112343726B - Diesel engine running state adjusting device - Google Patents
Diesel engine running state adjusting device Download PDFInfo
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- CN112343726B CN112343726B CN202011196470.1A CN202011196470A CN112343726B CN 112343726 B CN112343726 B CN 112343726B CN 202011196470 A CN202011196470 A CN 202011196470A CN 112343726 B CN112343726 B CN 112343726B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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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
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a diesel engine running state adjusting device which comprises a vehicle control unit and an engine controller, wherein the vehicle control unit is in communication connection with the engine controller, the vehicle control unit is configured to obtain the oxygen content of an area where a diesel engine is located, obtain an altitude value of the area where the diesel engine is located, determine theoretical oxygen content according to the altitude value, determine oxygen variation according to the oxygen content and the theoretical oxygen content, and the engine controller is configured to receive the oxygen variation and adjust the fuel injection quantity of the diesel engine according to the oxygen variation. By configuring the adjusting device provided by the invention, when the excavator works in an environment with uneven oxygen content distribution (such as a tunnel), if the oxygen content changes, the excavator can adjust the fuel injection quantity of the engine according to the current oxygen content, and the problem that the working environment of the tunnel is influenced because the excavator discharges a large amount of black smoke due to insufficient fuel combustion can be avoided.
Description
Technical Field
The embodiment of the invention relates to the engineering machinery technology, in particular to a diesel engine running state adjusting device.
Background
The tunnel working condition is a common working condition, and under the condition of good ventilation of the tunnel, the air pressure in the tunnel does not change greatly relative to the opening, but the oxygen content in the air is lower as the distance from the opening is farther away (the oxygen content in the air is reduced by more than 5 percent relative to the opening, known from some high-altitude long tunnel construction methods and actually reduced to about 10 percent).
At present, the diesel engine can only adjust combustion characteristic parameters such as oil injection quantity, oil injection timing and the like according to different atmospheric pressures, and adjust the control of a hydraulic pump, such as adjusting the displacement and the variation rate of the displacement, but cannot adjust the combustion characteristic parameters according to the variation of oxygen content. Because the diesel engine cannot adjust the combustion characteristic parameters such as the fuel injection quantity, the fuel injection timing and the like according to the change of the oxygen content, when the oxygen content of a working area where the diesel engine is located changes, if the load of the diesel engine is kept unchanged, the working state of the diesel engine is easily affected greatly, for example, fuel oil of the diesel engine cannot be completely combusted, so that the diesel engine emits a large amount of black smoke, and great harm is caused to the working environment of a tunnel and the health and safety production of workers. In addition, since the fuel is not completely combusted, the output power of the engine is low. If the load power generated by the hydraulic pump is not changed, the engine is likely to be stalled.
In order to solve the above problems, a conventional solution is to separately set up a dedicated overall controller or diesel engine controller program by an overall controller manufacturer or a diesel engine manufacturer for a specific tunnel environment, but when a use condition changes, such as a site is replaced or a depth of a tunnel working surface changes, the overall controller or diesel engine controller program needs to be updated, which increases unnecessary research and development costs.
Disclosure of Invention
The invention provides a diesel engine running state adjusting device, which aims to achieve the aim that fuel can be fully combusted when the oxygen content of a working area where a diesel engine is located is changed.
The embodiment of the invention provides a diesel engine running state adjusting device, which comprises a vehicle control unit and an engine controller, wherein the vehicle control unit is in communication connection with the engine controller,
the vehicle control unit is configured to obtain oxygen content of an area where the diesel engine is located, obtain an altitude value of the area where the diesel engine is located, determine theoretical oxygen content according to the altitude value, determine oxygen variation according to the oxygen content and the theoretical oxygen content,
the engine controller is configured to receive the oxygen variation and adjust the fuel injection quantity of the diesel engine according to the oxygen variation.
Optionally, an oxygen sensor is also included,
the oxygen sensor is connected with the vehicle control unit and used for detecting and sending the oxygen content to the vehicle control unit.
Optionally, the device also comprises an operation panel,
the operation panel is connected with the vehicle control unit and used for acquiring and sending the oxygen content to the vehicle control unit.
Optionally, the vehicle control system further comprises an atmospheric pressure sensor, the atmospheric pressure sensor is in communication connection with the vehicle control unit,
the atmospheric pressure sensor is used for detecting and sending an air pressure value to the vehicle control unit, and the vehicle control unit is further configured to calculate the altitude value according to the air pressure value.
Optionally, the engine controller is further connected with a hydraulic pump,
the engine controller is further configured to adjust a displacement of the hydraulic pump according to an amount of fuel injected from the diesel engine.
Optionally, when the fuel injection quantity of the diesel engine is adjusted, the percentage variation between the initial fuel injection quantity and the target fuel injection quantity is a first variation, the percentage variation of the oxygen variation is a second variation,
the first variation is the same as the second variation.
Optionally, the formula for calculating the altitude value according to the barometric pressure value is as follows:
optionally, the formula for determining the theoretical oxygen content according to the altitude value is as follows:
compared with the prior art, the invention has the beneficial effects that: the invention provides a diesel engine running state adjusting device, which enables an excavator to have the capability of acquiring the oxygen content in the current working environment and the theoretical oxygen content in the current working environment by configuring the adjusting device, when the excavator works in the environment with uneven oxygen content distribution (such as a tunnel), the excavator can capture the change of the oxygen content by comparing the oxygen content with the theoretical oxygen content in the current working environment, when the oxygen content is changed, the excavator can adjust the fuel injection quantity of an engine according to the current oxygen content so as to ensure that fuel can be fully combusted, and the phenomenon that the excavator discharges a large amount of black smoke due to insufficient fuel combustion to influence the working environment of the tunnel and endanger the body health of an excavator operator is avoided.
Drawings
FIG. 1 is a block diagram showing the structure of an adjusting apparatus in the embodiment;
FIG. 2 is a flow chart of an adjustment apparatus according to an embodiment;
FIG. 3 is a block diagram showing another structure of an adjusting apparatus according to the embodiment;
FIG. 4 is a block diagram showing a structure of another adjusting apparatus in the embodiment;
FIG. 5 is a block diagram showing a structure of another adjustment device in the embodiment;
fig. 6 is a flowchart of another adjustment device in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of an adjusting device in an embodiment, and referring to fig. 1, the embodiment provides an adjusting device for an operating state of a diesel engine, which includes a vehicle controller 100 and an engine controller 200, where the vehicle controller 100 is in communication connection with the engine controller 200. The engine controller 200 is connected to the engine 1.
For example, the vehicle controller 100 is an Electronic Control Unit (ECU), and the Engine controller 200 is an Engine Control Module (ECM).
Fig. 2 is a flowchart of an operation of an adjusting apparatus in an embodiment, and referring to fig. 2, an operation process of the adjusting apparatus includes:
s11, the whole vehicle controller obtains the oxygen content of the area where the diesel engine is located.
In this step, for example, the vehicle control unit may acquire the oxygen content of the current working area of the engineering machine through an oxygen sensor configured in the engineering machine (e.g., an excavator), and the vehicle control unit may also receive the manually input oxygen content to acquire the oxygen content of the current working area.
S12, the vehicle control unit obtains an altitude value of an area where the diesel engine is located, and theoretical oxygen content is determined according to the altitude value.
In this step, the vehicle control unit may acquire the altitude value of the area through a GPS system configured in the engineering machine itself, and the vehicle control unit may also receive the altitude value manually input to acquire the altitude value of the current working area.
Illustratively, there is a functional relationship between the oxygen content in the air and the altitude value, and when the altitude value is known, the oxygen content may be determined according to the functional relationship, and the formula representing the functional relationship is, for example:
in the formula (I), the compound is shown in the specification,
for theoretical oxygen content, H is the altitude value.
S13, the vehicle control unit determines the oxygen variation according to the oxygen content and the theoretical oxygen content.
For example, after the vehicle control unit calculates the theoretical oxygen content, the theoretical oxygen content is compared with the acquired oxygen content, and then the oxygen variation is generated.
S14, the engine controller receives the oxygen variation and adjusts the oil injection quantity of the diesel engine according to the oxygen variation.
For example, when a diesel engine is in operation, fuel reacts with oxygen according to a reaction relationship, which is:
AC x H y +BO 2 ＝CCO 2 +DH 2 O
wherein A, B, C, D is a coefficient, the specific value of which can be obtained by calibration test, C x H y As a mixture of paraffins (diesel fuel), O 2 As oxygen, CO 2 Is carbon dioxide, H 2 O is water.
For example, the reference fuel injection quantity of the diesel engine can be a theoretical fuel injection quantity obtained through calibration on the altitude.
Illustratively, according to the above chemical reaction formula, if the oxygen content participating in the reaction changes at a certain time, in order to make the reaction in an equilibrium state, the content of the paraffin mixture participating in the reaction (reference fuel injection) should also be changed proportionally, so as to avoid incomplete combustion of the paraffin mixture.
As an embodiment, the reaction formula may be:
KC x H y +K(x+1/4y)O 2 ＝KxCO 2 +K(1/2y)H 2 O
wherein K is the reactant ratio, based on the above reaction formula, the reactant ratio of the reacted multi-alkane mixture to the oxygen content is the same, based on which, the percentage change between the initial fuel injection amount and the target fuel injection amount is set as a first change amount, and the percentage change of the oxygen change amount is set as a second change amount, and then the first change amount is the same as the second change amount.
For example, if the initial reactant ratio is 100%, the reaction formula is:
100％C x H y +100％(x+1/4y)O 2 ＝100％xCO 2 +100％(1/2y)H 2 O
if the current oxygen content is reduced by 5%, the reactant proportion is 95%, and the reaction formula is as follows:
95％C x H y +95％(x+1/4y)O 2 ＝95％xCO 2 +95％(1/2y)H 2 O
for example, by ensuring that the first variation is the same as the second variation, the operation of the engine controller can be simplified, and the execution efficiency can be improved.
For example, in this embodiment, the adjustment device is configured to enable the excavator to have the capability of acquiring the oxygen content in the current working environment and the theoretical oxygen content in the current working environment, when the excavator works in an environment with unevenly distributed oxygen content (for example, a tunnel), the excavator can capture the change of the oxygen content by comparing the oxygen content with the theoretical oxygen content in the current working environment, and when the oxygen content changes, the excavator can adjust the fuel injection amount of the engine according to the current oxygen content to ensure that fuel can be sufficiently combusted, so as to avoid the phenomenon that the excavator discharges a large amount of black smoke due to insufficient fuel combustion, which affects the working environment of the tunnel and endangers the health of the excavator operators.
Fig. 3 is a block diagram of another adjustment device in the example, and referring to fig. 3, as an implementation scheme, the adjustment device further includes an oxygen sensor 300.
The oxygen sensor 300 is connected to the vehicle control unit 100, and the oxygen sensor 300 is configured to detect and transmit the oxygen content to the vehicle control unit 100.
For example, the adjustment device shown in fig. 3, the oxygen sensor may be disposed in the intake line integrated with the engine or at the intake port of the engine.
Illustratively, the operation of the adjusting device shown in fig. 3 includes:
And 2, acquiring an altitude value of the area where the diesel engine is located by the vehicle control unit, and determining theoretical oxygen content according to the altitude value.
In this step, the vehicle control unit may acquire the altitude value of the area through a GPS system configured in the engineering machine itself, and the vehicle control unit may also receive the altitude value manually input to acquire the altitude value of the current working area.
And 3, determining the oxygen variation quantity by the vehicle control unit according to the oxygen content and the theoretical oxygen content.
And 4, receiving the oxygen variation by the engine controller, and adjusting the fuel injection quantity of the diesel engine according to the oxygen variation.
Fig. 4 is a block diagram of a further adjustment device in the embodiment, and referring to fig. 4, as an implementation, the adjustment device further includes an operation panel 400.
The operation panel 400 is connected to the vehicle control unit 100, and the operation panel 400 is used to acquire and transmit the oxygen content to the vehicle control unit 100.
For example, the operation panel may be disposed in an operation table of the excavator.
Illustratively, the operation of the adjusting device shown in fig. 4 includes:
And 2, acquiring an altitude value of an area where the diesel engine is located by the vehicle control unit, and determining theoretical oxygen content according to the altitude value.
In this step, the vehicle control unit may acquire the altitude value of the area through a GPS system configured in the engineering machine itself, and the vehicle control unit may also receive the altitude value manually input to acquire the altitude value of the current working area.
And 3, determining the oxygen variation quantity by the vehicle control unit according to the oxygen content and the theoretical oxygen content.
And 4, receiving the oxygen variation by the engine controller, and adjusting the fuel injection quantity of the diesel engine according to the oxygen variation.
Fig. 5 is a block diagram of a further adjusting device in an embodiment, and referring to fig. 5, as an implementation, the adjusting device further includes an atmospheric pressure sensor 500, and the atmospheric pressure sensor 500 is communicatively connected to the vehicle controller 100.
The air pressure sensor is used for detecting and sending an air pressure value to the vehicle control unit, and the vehicle control unit is further configured to calculate an altitude value according to the air pressure value.
Illustratively, the operation of the adjusting device shown in fig. 5 includes:
In this step, for example, the vehicle control unit may acquire the oxygen content of the current working area of the engineering machine through an oxygen sensor configured in the engineering machine (e.g., an excavator), and the vehicle control unit may also receive the manually input oxygen content to acquire the oxygen content of the current working area.
And 2, detecting the air pressure value of the area where the diesel engine is located by the atmospheric pressure sensor, and sending the detected air pressure value to the vehicle control unit.
And 3, calculating an altitude value according to the air pressure value by the vehicle control unit, and determining theoretical oxygen content according to the altitude value.
For example, when the altitude value is calculated according to the barometric pressure value in this step, the formula adopted is as follows:
in the formula, P a Is the theoretical barometric pressure value, and H is the theoretical altitude value.
And 4, determining the oxygen variation quantity by the vehicle control unit according to the oxygen content and the theoretical oxygen content.
And 5, receiving the oxygen variation by the engine controller, and adjusting the fuel injection quantity of the diesel engine according to the oxygen variation.
For example, in the adjustment devices shown in fig. 3, 4, and 5, the engine controller 200 is also connected to the hydraulic pump. The engine controller is further configured to adjust a displacement of the hydraulic pump according to an amount of fuel injected from the diesel engine.
For example, when the fuel injection quantity changes, the output power of the diesel engine also changes correspondingly, and at the moment, the engine controller changes the displacement of the hydraulic pump correspondingly to change the power of a hydraulic system so as to match the load of the engineering machinery with the output power of the engine.
For example, the corresponding relation between the fuel injection quantity and the displacement of the hydraulic pump is obtained through a calibration test.
Example two
For example, in the production and development process of a diesel engine, a calibration test is required to determine corresponding system operation parameters (combustion characteristic parameters such as fuel injection quantity and fuel injection timing) under a specific operation condition, and during the calibration test, the air pressure value can be used as a limiting condition for calibration to calibrate the system operation parameters under the corresponding condition.
Fig. 6 is a flowchart of another operation of the adjusting device in the embodiment, and referring to fig. 6, the operation of the adjusting device includes:
and S21, acquiring the oxygen content of the area where the diesel engine is located by the vehicle control unit.
For example, in this embodiment, the vehicle control unit may acquire the oxygen content of the current working area of the engineering machine through an oxygen sensor configured in the engineering machine (e.g., an excavator), and the vehicle control unit may also receive the manually input oxygen content to acquire the oxygen content of the current working area.
S22, determining a theoretical altitude value by the vehicle control unit according to the oxygen content.
Illustratively, there is a functional relationship between the oxygen content in the air and the altitude value, and when the oxygen content is known, the altitude value may be determined according to the functional relationship, and the formula representing the functional relationship is, for example:
in the formula (I), the compound is shown in the specification,
is the oxygen content and H is the theoretical altitude value.
S23, the vehicle control unit determines a theoretical air pressure value according to the theoretical altitude value.
Illustratively, when calculating the theoretical barometric pressure value according to the theoretical altitude value, the formula used is:
in the formula, P a Is the theoretical barometric pressure value and H is the theoretical altitude value.
S24, the engine controller receives the theoretical air pressure value and adjusts the oil injection quantity of the diesel engine according to the theoretical air pressure value.
In this step, the engine controller stores a calibrated matching relationship between the air pressure value and the fuel injection amount, and when the theoretical air pressure value is obtained, the engine controller may query a target fuel injection amount that matches the calculated theoretical air pressure value from the stored matching relationship, and adjust the fuel injection amount of the engine to the queried target fuel injection amount.
For example, in this embodiment, the excavator has the capability of acquiring the oxygen content in the current working environment by configuring the adjusting device, when the excavator works in an environment with uneven oxygen content distribution (for example, a tunnel), the excavator can capture the change of the oxygen content, and when the oxygen content changes, the excavator can adjust the fuel injection amount of the engine to ensure that fuel can be sufficiently combusted, so that the phenomenon that the excavator discharges a large amount of black smoke due to insufficient fuel combustion, influences the working environment of the tunnel and endangers the physical health of the excavator operators is avoided.
For example, in this embodiment, the adjusting device may adopt the structure shown in fig. 3, and the working process of the adjusting device includes:
And 2, acquiring the oxygen content of the area where the diesel engine is located by the vehicle control unit.
And 3, determining a theoretical altitude value by the vehicle control unit according to the oxygen content.
And 4, determining a theoretical air pressure value by the vehicle control unit according to the theoretical altitude value.
And 5, receiving the theoretical air pressure value by the engine controller, and adjusting the oil injection quantity of the diesel engine according to the theoretical air pressure value.
As an alternative, the adjustment device may adopt the structure shown in fig. 4, and the operation process of the adjustment device includes:
And 2, acquiring the oxygen content of the area where the diesel engine is located by the vehicle control unit.
And 3, determining a theoretical altitude value by the vehicle control unit according to the oxygen content.
And 4, determining a theoretical air pressure value by the vehicle control unit according to the theoretical altitude value.
And 5, receiving the theoretical air pressure value by the engine controller, and adjusting the oil injection quantity of the diesel engine according to the theoretical air pressure value.
As one possible embodiment, step S24 may be:
and S241, the whole vehicle controller obtains the initial oxygen content and the initial fuel injection quantity when the diesel engine runs.
In this step, the vehicle control unit obtains the oxygen content of the area where the excavator is located at the initial operation time as the initial oxygen content, and simultaneously the engine controller controls the engine to inject oil according to the driving requirement, and the vehicle control unit records the oil injection amount corresponding to the driving requirement as the initial oil injection amount.
For example, if the oxygen content changes for the first time from the initial operation time of the excavator, the initial oxygen content is the oxygen content of the area where the excavator is located at the initial operation time, at this time, the vehicle controller records the changed oxygen content, and if the oxygen content changes again, the initial oxygen content is updated to the oxygen content recorded by the vehicle controller when the first oxygen content changes, relative to the oxygen content changed again.
Illustratively, the initial fuel injection amount is the same as the update strategy for the initial oxygen content.
And S242, determining an initial theoretical air pressure value by the vehicle control unit according to the initial oxygen content.
Illustratively, the formula used in the determination of the pressure value for the oxygen content in this step includes:
and S243, determining the variation of the oil injection quantity by the vehicle control unit according to the initial theoretical air pressure value and the theoretical air pressure value.
In this step, when the vehicle control unit determines that the oxygen content of the working area where the excavator is located changes, the vehicle control unit calculates an air pressure value corresponding to the currently obtained oxygen content as a theoretical air pressure value, and according to the theoretical air pressure value, the vehicle control unit may obtain a target fuel injection amount corresponding to the theoretical air pressure value.
And S244, adjusting the initial oil injection quantity to a target oil injection quantity by the engine controller according to the oil injection quantity variable quantity.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A diesel engine running state adjusting device is characterized by comprising a vehicle control unit and an engine controller, wherein the vehicle control unit is in communication connection with the engine controller,
the vehicle control unit is configured to obtain oxygen content of an area where the diesel engine is located, obtain an altitude value of the area where the diesel engine is located, determine theoretical oxygen content according to the altitude value, determine oxygen variation according to the oxygen content and the theoretical oxygen content,
the engine controller is configured to receive the oxygen variation and adjust the fuel injection quantity of the diesel engine according to the oxygen variation.
2. The diesel engine operating condition adjusting apparatus according to claim 1, further comprising an oxygen sensor,
the oxygen sensor is connected with the vehicle control unit and used for detecting and sending the oxygen content to the vehicle control unit.
3. The diesel engine operating condition adjusting apparatus of claim 1, further comprising an operation panel,
the operation panel is connected with the vehicle control unit and used for acquiring and sending the oxygen content to the vehicle control unit.
4. The diesel engine operating condition adjusting apparatus according to claim 1, further comprising an atmospheric pressure sensor communicatively connected to the vehicle control unit,
the atmospheric pressure sensor is used for detecting and sending an air pressure value to the vehicle control unit, and the vehicle control unit is further configured to calculate the altitude value according to the air pressure value.
5. The diesel engine operating condition adjusting apparatus according to claim 1, wherein the engine controller is further connected to a hydraulic pump,
the engine controller is further configured to adjust a displacement of the hydraulic pump according to an amount of fuel injected from the diesel engine.
6. The diesel engine operating condition adjusting apparatus according to claim 1, wherein when the fuel injection quantity of the diesel engine is adjusted, a percentage change amount between an initial fuel injection quantity and a target fuel injection quantity is a first change amount, and a percentage change amount of the oxygen change amount is a second change amount,
the first variation is the same as the second variation.
7. The diesel engine operating condition adjusting apparatus as set forth in claim 4, wherein the altitude value is calculated based on the barometric pressure value using the formula:
in the formula, P a Is the barometric pressure value and H is the altitude value.
8. The diesel engine operating condition adjusting apparatus as set forth in claim 7, wherein the theoretical oxygen content is determined based on the altitude value using the formula:
in the formula (I), the compound is shown in the specification,
for theoretical oxygen content, H is the altitude value.
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| CN113978209A (en) * | 2021-10-27 | 2022-01-28 | 合肥正浩机械科技有限公司 | Oxygen generation and supply system for high-altitude fuel-powered automobile |
| CN114941579B (en) * | 2022-05-09 | 2023-06-23 | 潍柴动力股份有限公司 | Control method, device and equipment for engine smoke intensity and storage medium |
| CN117072337B (en) * | 2023-10-13 | 2024-02-20 | 潍柴动力股份有限公司 | Method and device for correcting engine parameters, electronic equipment and storage medium |
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