CN206234009U - The cylinder jacket of diesel engine - Google Patents

Abstract

The utility model discloses a kind of cylinder jacket of diesel engine, including cylinder liner body, inner groove is provided with the inwall of cylinder liner body, inner groove is located at the tip position of cylinder liner body, run to the position of top piston ring during top dead centre higher than piston the position of inner groove, inner groove has upper chamfering and lower chamfering, the chamfer angle of the chamfer angle more than upper chamfering of lower chamfering.The cylinder jacket can overcome machine oil to enter combustion chambers burn with piston stroking upward, cause machine oil to be lost big, and piston crown carbon distribution is serious, causes piston ring sticking, causes the shortcoming that engine oil consumption is higher.

Description

The cylinder jacket of diesel engine

Technical field

The utility model is related to cylinder jacket field, more particularly to a kind of cylinder jacket of diesel engine.

Background technology

Cylinder jacket is a cylindrical component, and piston is reciprocating in cylinder cover inner hole.The cylinder that conventional art is used Set, a part of machine oil enters combustion chambers burn, causes machine oil to be lost with piston stroking upward.And engine piston easily produces product Carbon, particularly piston crown carbon distribution are serious, cause piston ring sticking, cause engine oil consumption higher.

The information for being disclosed in the background section is merely intended to increase the understanding to general background of the present utility model, and It is not construed as recognizing or implying in any form that the information structure has been existing well known to persons skilled in the art Technology.

Utility model content

The purpose of this utility model is to provide a kind of cylinder jacket of diesel engine, overcomes machine oil to enter with piston stroking upward and burns Room is burnt, and causes machine oil to be lost big, and piston crown carbon distribution is serious, causes piston ring sticking, causes that engine oil consumption is higher to be lacked Point.

To achieve the above object, the utility model provides a kind of cylinder jacket of diesel engine, including cylinder liner body, cylinder Inner groove is provided with the inwall for covering body, inner groove is located at the tip position of cylinder liner body, and the position of inner groove is higher than work To the position of top piston ring during top dead centre, inner groove has upper chamfering and lower chamfering, the chamfering length of lower chamfering for plug operation More than the chamfering length of upper chamfering.

Preferably, the height≤2mm of inner groove, depth≤2mm.

Preferably, the position of inner groove to piston run to the distance of the position of top piston ring during top dead centre >= 4.5mm。

Compared with prior art, the utility model has the advantages that：Near top inside cylinder jacket of diesel engine Position is provided with inner groove, and inner groove is provided with chamfering and lower chamfering, it is ensured that the reciprocating piston of not scratch.Meanwhile, it is interior Annular groove can effectively prevent the machine oil of cylinder liner internal wall from entering combustion chamber, reduce engine oil consumption and then can effectively remove piston crown product Carbon, it is to avoid because piston crown carbon distribution effectively causes piston ring sticking, cause engine oil consumption higher, improve diesel engine life-span and Whole aircraft reliability.

Brief description of the drawings

Fig. 1 is the front view of the cylinder jacket according to diesel engine of the present utility model.

Fig. 2 is the local I zoomed-in view according to the cylinder jacket of diesel engine of the present utility model.

Fig. 3 is the installation diagram of the cylinder jacket according to diesel engine of the present utility model and piston.

Specific embodiment

Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality New protection domain is not limited by specific embodiment.

Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " including " or its change Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other units Part or other parts.

As shown in Figure 1 to Figure 3, a kind of cylinder jacket of the diesel engine according to the utility model specific embodiment, including gas Liner body 1, is provided with inner groove 2 on the inwall of cylinder liner body 1, inner groove 2 is located at the tip position of cylinder liner body 1, The position of inner groove 2 is run to the position of top piston ring during top dead centre 4 higher than piston 3, and inner groove 2 has the He of upper chamfering 21 Lower chamfering 22, the chamfering length of the chamfering length more than upper chamfering 21 of lower chamfering 22.

In such scheme, be provided with inner groove 2 on the inwall of cylinder liner body 1, inner groove 2 be provided with chamfering 21 and it is lower fall Angle 22, piston 3 is moved back and forth in cylinder liner body 1, the upper chamfering 21 and lower chamfering 22 set on inner groove 2, it is ensured that piston 3 In uplink and downlink, the surface of not scratch piston 3.Inner groove 2 is located at the tip position of cylinder liner body 1, and its position is higher than work The operation of plug 3 is to top piston ring during top dead centre 4, it is preferable that with the distance of the top piston ring 4 of top dead center position >= 4.5mm, it is ensured that the sealing of cylinder jacket and piston ring.In the middle of present embodiment, when piston 3 goes upward to inner groove 2, inner groove 2 Can retain most of with the up machine oil of piston 3, prevent excessive machine oil from entering combustion chambers burn, reach the effect for reducing engine oil consumption Really.Meanwhile, lower chamfering 22 is more than upper chamfering 21, is conducive to machine oil to flow back.So, piston 3 is moved back and forth in cylinder liner body 1 During, inner groove 2 can effectively remove piston crown carbon distribution, it is to avoid because piston crown carbon distribution effectively causes piston ring sticking, Cause engine oil consumption higher, improve life-span and the whole aircraft reliability of diesel engine.

As a kind of preferred embodiment, the height≤2mm of cylinder jacket annular groove 2, depth≤2mm.

Used as a kind of preferred embodiment, position to the piston of inner groove is run to the position of top piston ring during top dead centre Distance >=4.5mm.

To sum up, the cylinder jacket of the diesel engine of the present embodiment, close tip position is provided with interior inside cylinder jacket of diesel engine Annular groove 2, inner groove 2 is provided with chamfering and lower chamfering, it is ensured that the reciprocating piston of not scratch.Meanwhile, inner groove 2 can be effective Prevent the machine oil of cylinder liner internal wall from entering combustion chamber, reduce engine oil consumption and then can effectively remove piston crown carbon distribution, it is to avoid due to Piston crown carbon distribution effectively causes piston ring sticking, causes engine oil consumption higher, improves life-span and the whole aircraft reliability of diesel engine. On the basis of the cylinder jacket of prior art, inwall processes an annular groove to the cylinder jacket, you can effectively prevent excessive machine oil from entering combustion Burn room and prevent piston crown carbon distribution.Without changing original cylinder jacket basic structure, processing technology is simple, low cost, it is easy to Large-scale production.

The foregoing description to specific illustrative embodiment of the present utility model be in order to illustrate and illustration purpose.These Description is not wishing to for the utility model to be defined to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining certain principles of the present utility model And its practical application, so that those skilled in the art can realize and utilize a variety of examples of the present utility model Property embodiment and a variety of selections and change.Scope of the present utility model is intended to by claims and its waits similar shape Formula is limited.

Claims (3)

1. a kind of cylinder jacket of diesel engine, including cylinder liner body, it is characterised in that set on the inwall of the cylinder liner body There is inner groove, the inner groove is located at the tip position of the cylinder liner body, and the position of the inner groove is run higher than piston To the position of top piston ring during top dead centre, the inner groove has upper chamfering and lower chamfering, and the chamfering of the lower chamfering is long Chamfering length of the degree more than the upper chamfering.

2. the cylinder jacket of diesel engine according to claim 1, it is characterised in that the height≤2mm of the inner groove, depth ≤2mm。

3. the cylinder jacket of diesel engine according to claim 1, it is characterised in that run the position of the inner groove to piston To the distance >=4.5mm of the position of top piston ring during top dead centre.