CN104421037A - Piston structure assembly of automobile engine - Google Patents
Piston structure assembly of automobile engine Download PDFInfo
- Publication number
- CN104421037A CN104421037A CN201310372025.XA CN201310372025A CN104421037A CN 104421037 A CN104421037 A CN 104421037A CN 201310372025 A CN201310372025 A CN 201310372025A CN 104421037 A CN104421037 A CN 104421037A
- Authority
- CN
- China
- Prior art keywords
- piston
- ring
- piston ring
- automobile engine
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- F02F3/10—Pistons having surface coverings
-
- 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
- F02F5/00—Piston rings, e.g. associated with piston crown
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A piston structure assembly of an automobile engine comprises a piston, a first piston ring, a second piston ring and an oil ring component and is characterized in that an annular V-shaped groove is formed on a piston wall between the first piston ring and the second piston ring; and a lower piston ring groove is formed on the external ring of the second piston ring. The piston is provided with the annular V-shaped groove on the piston wall between a first piston ring groove and a second piston ring groove so as to match with the design of the closed gaps of the first piston ring and the second piston ring and avoid over-high ring-land pressure of the second piston ring. A graphite coating is painted at the piston skirt, so that the friction loss between the piston and a cylinder body can be effectively reduced. The ring groove is designed on the second piston ring, the oil scraping effect is ensured and the oil consumption is improved. And the piston structure assembly of the automobile engine has the advantages of simple and rational structure, high strength, long service life, safety and reliability and wide application range and the like.
Description
Technical field
The invention belongs to technical field of automobile engine, specifically a kind of piston of automobile engine structural assembly.
Background technique
Piston of automobile engine and Piston volume tube are the strength members of left and right engine performance.In the prior art, in order to ensure gas sealing, Piston volume tube adopts high tension design.In addition, plunger designs is only considered from intensity, seems more clumsy.Now due to problems such as oil supply and demand contradiction and environmental protection, the performance requirement of adding petrol engine is more and more higher, therefore improves the major domain that combustion efficiency has become petrol engine to study with reduction frictional loss.This just requires that piston and piston ring not only will improve wear resistance and heat resistance, realizes the function of sealed high pressure combustion gas; But also piston and Piston volume tube quality will be reduced, and the frictional loss between they and cylinder block, avoid the energy to consume excessively.
Summary of the invention
The object of this invention is to provide a kind of piston of automobile engine structural assembly.To increase cylinder open height, improve cylinder actinal surface sealing load.
The object of the present invention is achieved like this, a kind of piston of automobile engine structural assembly, and it includes piston, first piston ring, the second piston ring, and oil ring assembly, is characterized in that: be provided with ring-type along on the piston wall between first piston ring, the second piston ring
vshape groove; The outer, bottom of the second piston ring is also provided with annular groove under a piston ring.
Ring-type as above
vshape groove and first piston ring be arranged in parallel.
The graphite coating for reducing frictional loss between piston and cylinder body is scribbled in piston skirt; The graphite coating thickness of described piston skirt is 8 ~ 15 μm.
Advantage of the present invention is:
Because on the piston wall of piston between first piston ring annular groove and the second piston ring annular groove, (ring on the bank) is provided with ring-type
vshape groove, to mate first piston ring and the design of the second piston ring end gap clearance.Because in expansion stroke, if end-gaps design is bad, the ring bank pressure of the second piston ring can be caused to be greater than the ring bank pressure of first piston ring, and gas push machine oil enters into firing chamber, and consumption of lubricating oil can be caused to increase.In order to avoid consumption of lubricating oil worsens, need the end-gaps of expansion second piston ring to suppress ring bank pressure increase.But expansion end-gaps, can increase the piston air leakage of motor, this needs us to open one on the bank at the ring of piston
vshape groove, avoids the ring bank overpressure of the second piston ring.
Scribble graphite coating in piston skirt, effectively can reduce the frictional loss between piston and cylinder body like this.
The present invention adopts annular groove design at the second piston ring, ensures frizing effect, improves oil consumption.
This is novel also have simple and reasonable, the advantages such as intensity is high, long service life, safe and reliable, and application area is wide.
Accompanying drawing explanation
Fig. 1 is mounting structure simplified schematic diagram of the present invention;
Fig. 2 is that in Fig. 1, A-A amplifies simplified schematic diagram to structure;
Fig. 3 is that in Fig. 1, B-B amplifies simplified schematic diagram to structure;
Fig. 4 is that the second piston ring structure in the present invention amplifies simplified schematic diagram;
Fig. 5 is that in Fig. 4, D-D amplifies simplified schematic diagram to structure.
The symbol description of accompanying drawing major component
1 is engine cylinder, and 2 is piston, and 3 is first piston ring, and 4 is the second piston ring, and 5 is oil ring assembly, and 6 is wrist pin, and 7 is link assembly, and 8 are
vshape groove, 9 is graphite coating, and 10 is annular groove under piston ring.
Be described in further detail the present invention by example below in conjunction with accompanying drawing, but following example is only the present invention's example wherein, do not represent the right protection scope that the present invention limits, the scope of the present invention is as the criterion with claims.
Embodiment
example 1
As shown in Fig. 1 ~ 5,1 in figure is engine cylinder, and 2 is piston, and 3 is first piston ring, and 4 is the second piston ring, and 5 is oil ring assembly, and 6 is wrist pin, is being provided with ring-type along on the piston wall between first piston ring 3 and the second piston ring 4
vshape groove 8; The outer, bottom of the second piston ring 4 is also provided with annular groove 10 under a piston ring.
The technical solution used in the present invention comprises piston 2 and Piston volume tube, and (first piston ring 3, second piston ring 4 and oil ring assembly 5 form.Piston volume tube is arranged in the annular groove of piston 2, forms a complete sealing system with piston 2, engine cylinder 1.Wherein, the effect of first piston ring 3 and the second piston ring 4 is sealing gas, and the effect of oil ring assembly 5 is canned motor machine oil.During use, as shown in the figure, first by wrist pin 6, the present invention and link assembly 7 are linked together, the power transmission of motor is gone out.
The durability that piston ring works under severe conditions is ensure that owing to adopting refractory coating design, therefore the firepower bank height of piston is reduced to 4mm from 6mm, which decrease the compression height of piston, decrease reciprocation mass, reduce the frictional loss between piston ring and cylinder block, also improve oil consumption.
Piston adds on the bank at the ring of first piston ring annular groove and the second piston ring annular groove
vshape groove design 8, to mate first piston ring and the second piston ring end gap clearance E design (first piston ring: 0.12 ~ 0.30mm, the second piston ring: 0.25 ~ 0.45mm).Because in expansion stroke, if end-gaps design is bad, the ring bank pressure of the second piston ring can be caused to be greater than the ring bank pressure of first piston ring, and gas push machine oil enters into firing chamber, and consumption of lubricating oil can be caused to increase.In order to avoid consumption of lubricating oil worsens, need the end-gaps of expansion second piston ring to suppress ring bank pressure increase.But expansion end-gaps, can increase the piston air leakage of motor, this needs us to open one on the bank at the ring of piston
vshape groove, avoids the ring bank overpressure of the second piston ring.
Scribble the graphite coating 9 that thickness is 8 ~ 15 μm in piston skirt, effectively can reduce the frictional loss between piston and cylinder body like this.
Under second piston ring adopts piston ring, annular groove 10 designs, and ensures frizing effect, improves oil consumption.
Adopt the design of low ring height, under the prerequisite ensureing slubbing piston ring high tension, the tension value of whole Piston volume tube but reduces (specifically seeing the following form 1) greatly than traditional design, which decreases the frictional loss of Piston volume tube, improves oil consumption.
First piston ring excircle adopts PVD (physical gas phase deposition technology) process (PT1, hardness HV1200 ~ 1800), oil ring member perimeter Zhou Caiyong PVD process (PT2, hardness HV900 ~ 1400), improve wear resistance and heat resistance, with the high load requirement of corresponding petrol engine.
Through overtesting, oil consumption be improved significantly, minimum specific fuel consumption reduces 2.8g/kW.h, and simultaneously engine oil consumption is also from 50cm
3/ h reduces to 49.5cm
3/ h.
table 1
Claims (4)
1. a piston of automobile engine structural assembly, it includes piston, first piston ring, the second piston ring, and oil ring assembly, is characterized in that: be provided with ring-type along on the piston wall between first piston ring, the second piston ring
vshape groove; The outer, bottom of the second piston ring is also provided with annular groove under a piston ring.
2. piston of automobile engine structural assembly according to claim 1, is characterized in that: described ring-type
vshape groove and first piston ring be arranged in parallel.
3. piston of automobile engine structural assembly according to claim 1, is characterized in that: scribble the graphite coating for reducing frictional loss between piston and cylinder body in piston skirt.
4. piston of automobile engine structural assembly according to claim 3, is characterized in that: the graphite coating thickness of piston skirt is 8 ~ 15 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372025.XA CN104421037A (en) | 2013-08-23 | 2013-08-23 | Piston structure assembly of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310372025.XA CN104421037A (en) | 2013-08-23 | 2013-08-23 | Piston structure assembly of automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104421037A true CN104421037A (en) | 2015-03-18 |
Family
ID=52970984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310372025.XA Pending CN104421037A (en) | 2013-08-23 | 2013-08-23 | Piston structure assembly of automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104421037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11306678B1 (en) | 2020-11-11 | 2022-04-19 | Caterpillar Inc. | Piston design feature to minimize periodic second land pressure variation |
| CN115614151A (en) * | 2022-11-03 | 2023-01-17 | 赛力斯集团股份有限公司 | Cylinder assembly with low friction |
-
2013
- 2013-08-23 CN CN201310372025.XA patent/CN104421037A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11306678B1 (en) | 2020-11-11 | 2022-04-19 | Caterpillar Inc. | Piston design feature to minimize periodic second land pressure variation |
| DE102021128653A1 (en) | 2020-11-11 | 2022-05-12 | Caterpillar Inc. | PISTON DESIGN FEATURE TO MINIMIZE SECOND LAND PERIODIC PRESSURE VARIATION |
| CN115614151A (en) * | 2022-11-03 | 2023-01-17 | 赛力斯集团股份有限公司 | Cylinder assembly with low friction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |