CN209724513U

CN209724513U - A kind of new-typed gasoline engine piston

Info

Publication number: CN209724513U
Application number: CN201920560749.XU
Authority: CN
Inventors: 杨璐
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2019-12-03
Anticipated expiration: 2029-04-22

Abstract

The utility model belongs to technology of gasoline engine field, more particularly to a kind of new-typed gasoline engine piston, including piston only, compression, middle compression and lower wiper groove are disposed on piston only, guide groove is provided between the lower wall and piston only outer wall of the lower wiper groove, guide groove includes vertical plane and inclined surface, and vertical plane is adjacent with lower wiper groove, and inclined surface is adjacent with piston only outer wall；The slot bottom of the lower wiper groove is provided with horizontal oil permeable hole, and setting inclination oil permeable hole on the guide groove, horizontal oil permeable hole and inclination oil permeable hole are through to piston only inner cavity.The purpose of the utility model is to provide a kind of new-typed gasoline engine pistons to scrape inboard wall of cylinder liner lubricating oil convenient for compound oil ring by the way that guide groove structure, two kinds of oil permeable holes is arranged, reduce the content of HC in exhaust emissions.

Description

A kind of new-typed gasoline engine piston

Technical field

The utility model belongs to technology of gasoline engine field, and in particular to a kind of new-typed gasoline engine piston.

Background technique

In conjunction with attached drawing 2, only by chamfered transition between the wiper groove and piston outer wall of existing piston of gasoline engine, on piston When row, it is easy to bring inner wall lubricating oil into combustion chambers burn, the content of HC in tail gas is caused to increase.

Utility model content

The purpose of the utility model is to provide a kind of new-typed gasoline engine pistons, pass through setting guide groove structure, two kinds of saturating oil Hole scrapes inboard wall of cylinder liner lubricating oil convenient for compound oil ring, reduces the content of HC in exhaust emissions.

Purpose of the utility model is realized as follows: a kind of new-typed gasoline engine piston, including piston only, piston only On be disposed with compression, middle compression and lower wiper groove, it is characterised in that: the lower wall and piston of the lower wiper groove Guide groove is provided between body outer wall, guide groove includes vertical plane and inclined surface, and vertical plane is adjacent with lower wiper groove, inclined surface It is adjacent with piston only outer wall；The slot bottom of the lower wiper groove is provided with horizontal oil permeable hole, and setting inclination is saturating on the guide groove Oilhole, horizontal oil permeable hole and inclination oil permeable hole are through to piston only inner cavity.

Further, the horizontal oil permeable hole is evenly distributed in 10-12, and inclination oil permeable hole is evenly distributed in 6-8.

Further, the inclination oil permeable hole opening is located at vertical plane and inclined surface intersection.

Further, firepower lead-in chamfered is provided between the piston only top surface and outer wall.

Further, height of the upper compression upper side wall apart from piston only top surface is less than 3mm.

Further, the axial height of the upper compression is less than 1mm, and the axial height of middle compression is less than 1.2mm, under The axial height of wiper groove is less than 2.5mm.

Compared with the prior art, the utility model has prominent and beneficial technical effects that:

This programme is by horizontal oil permeable hole and tilts opening up for oil permeable hole, using guide groove, effectively scrapes inboard wall of cylinder liner profit Lubricating oil；Increase big chamfering in the firepower bank head position of piston, shortens piston junk length, while reducing the axis of piston ring groove To height, successively guarantees the full combustion of piston and steel-jacket gap position fuel oil, reduce HC and NO and CO in exhaust emissions Content.

Detailed description of the invention

Fig. 1 is cooperation figure of the piston in cylinder sleeve in the utility model embodiment.

Fig. 2 is the cross-sectional view of prior art piston.

Fig. 3 is the cross-sectional view of piston in the utility model embodiment.

Fig. 4 is the cross-sectional view in the direction A-A in Fig. 3.

Appended drawing reference: 1, piston only；2, cylinder sleeve；3, compound oil ring；4, two compression ring；5, one of compression ring；6, upper compression ring Slot；7, middle compression；8, lower wiper groove；9, firepower lead-in chamfered；10, guide groove；10a, vertical plane；10b, inclined surface；11, incline Oblique oil permeable hole；12, horizontal oil permeable hole.

Specific embodiment

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.

A kind of new-typed gasoline engine piston includes piston only 1 combined with Figure 1 and Figure 2, and piston only 1 cooperates in cylinder sleeve 2, Compression 6, middle compression 7 and lower wiper groove 8 are disposed on 1 lateral wall of piston only, upper compression 6 cooperates one of gas Ring 5, middle compression 7 cooperate two compression rings 4, and lower wiper groove 8 cooperates compound oil ring 3 to scrape the lubricating oil on steel wall when being used for uplink Under.

It specifically sees Fig. 3, is provided with guide groove 10, guide groove 10 between 1 outer wall of lower wall and piston only of lower wiper groove 8 Including vertical plane 10a and inclined surface 10b, vertical plane 10a is adjacent with lower wiper groove 8, inclined surface 10b and 1 outer wall phase of piston only It is adjacent；Wherein, the slot bottom of lower wiper groove 8 is provided with horizontal oil permeable hole 12, setting inclination oil permeable hole 11 on guide groove 10, horizontal oil thoroughly Hole 12 and inclination oil permeable hole 11 are through to 1 inner cavity of piston only.In conjunction with Fig. 4, the angular circular of horizontal 12 case W1 of oil permeable hole is equal 10-12 are furnished with, the angular circular of inclination 11 case W2 of oil permeable hole is evenly equipped with 6-8.Preferably, inclination oil permeable hole 11 opening is located at Vertical plane 10a and inclined surface 10b intersection.And inclination 11 axis preferred vertical inclined surface 10b of oil permeable hole.

It specifically sees Fig. 3 amplification unit, is provided with firepower lead-in chamfered 9 between 1 top surface of piston only and outer wall.In piston Firepower bank head position increases firepower lead-in chamfered 9, and shortens piston junk length and (go up 6 upper side wall of compression apart from piston The height of 1 top surface of ontology) it is less than 3mm；Reduce piston ring groove axial height, compression 6 is made to be less than 1mm, middle compression 7 is less than 1.2mm, lower wiper groove 8 are less than 2.5mm；In combination with Fig. 1, piston ring groove radial depth L1, L2, L3 are designed, is allowed to and cooperates One of compression ring 5, two compression rings 4, the radial clearance C1 of compound oil ring 3 C2 C3 in 0.3-0.6mm.

In engine behavior, circular motion is converted linear motion by crankshaft connecting rod system, bent in compression stroke Axis and connecting rod shift piston onto top dead centre (piston and connecting rod pass through piston pin connection) from the lower dead center of cylinder sleeve 2, and fuel oil is mixed at this time It closes gas to be compressed in combustion chamber, spark ignitor fuel mixture, the rapid diffusion combustion fuel mixture of flame.In conjunction with Fig. 2, by In not having chamfering between top land and side wall in the prior art, gap is narrow between piston and cylinder sleeve 2, and flame is difficult to be diffused into This position causes this position to be unable to full combustion, leads in tail gas that HC and NO and CO content are higher, it is difficult to reach new legislation and want It asks.Increase chamfering flame is introduced directly into gap；Piston ring groove axial height is reduced, lowers gap depth, reaches maximum journey The full combustion of degree reduces frictional force and heat radiation, and heat transfer is reduced HC and NO and CO in exhaust emissions in time Content.Can guarantee that piston and piston ring operate normally inside cylinder sleeve 2, also need by reasonable radial clearance C1 C2 C3 And oil permeable hole.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change It also should be regarded as the protection scope of the utility model into replacement.

Claims

1. a kind of new-typed gasoline engine piston, including piston only, be disposed on piston only compression, middle compression and Lower wiper groove, it is characterised in that: be provided with guide groove, guide groove between the lower wall and piston only outer wall of the lower wiper groove Including vertical plane and inclined surface, vertical plane is adjacent with lower wiper groove, and inclined surface is adjacent with piston only outer wall；The lower wiper groove Slot bottom be provided with horizontal oil permeable hole, setting inclination oil permeable hole on the guide groove, horizontal oil permeable hole and inclination oil permeable hole pass through It wears to piston only inner cavity.

2. a kind of new-typed gasoline engine piston according to claim 1, it is characterised in that: the horizontal oil permeable hole circumference uniform distribution There are 10-12, inclination oil permeable hole is evenly distributed in 6-8.

3. a kind of new-typed gasoline engine piston according to claim 1 or 2, it is characterised in that: the inclination oil permeable hole opening Positioned at vertical plane and inclined surface intersection.

4. a kind of new-typed gasoline engine piston according to claim 1, it is characterised in that: the piston only top surface and outer wall Between be provided with firepower lead-in chamfered.

5. a kind of new-typed gasoline engine piston according to claim 1 or 4, it is characterised in that: the upper compression upper side wall Height apart from piston only top surface is less than 3mm.

6. a kind of new-typed gasoline engine piston according to claim 1, it is characterised in that: the axial height of the upper compression Less than 1mm, the axial height of middle compression is less than 1.2mm, and the axial height of lower wiper groove is less than 2.5mm.