CN104122019B

CN104122019B - A kind of measuring method of engine subsystems frictional work

Info

Publication number: CN104122019B
Application number: CN201410351965.5A
Authority: CN
Inventors: 陆鹏; 黄勇; 甘黎明; 蒋士洪; 夏志豪
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2014-07-23
Filing date: 2014-07-23
Publication date: 2017-10-10
Anticipated expiration: 2034-07-23
Also published as: CN104122019A

Abstract

The present invention relates to engine art, more particularly to a kind of measuring method of engine subsystems frictional work.The present invention provides a kind of measuring method of engine subsystems frictional work, comprises the following steps：A, the external machine oil external circulating device at oil filter, the external coolant external circulating device at water pump.B, measurement crank shaft friction work(T_{Bent axle}, piston rod frictional work T_{Piston rod}, camshaft and timing chain frictional work T_Camshaft, driving valve frictional work T_Valve, oil pump frictional work T_{Oil pump}, other train frictional works T_Train, complete machine frictional work T_{Complete machine}, pumping loss T_{Pump gas}；C:The subsystem frictional work of like product is contrasted, is optimized for the higher subsystem of frictional work.It is bad the beneficial effects of the invention are as follows the level of each subsystem mechanical loss of engine can be clear from, improved for design and optimization provides direction, the structurally consummate degree and adjustment assembly quality of engine can also be evaluated, the uniformity of engine work can also be evaluated.

Description

A kind of measuring method of engine subsystems frictional work

Technical field

The present invention relates to engine art, more particularly to a kind of measuring method of engine subsystems frictional work.

Background technology

In conventional engine experiment, only the frictional work of engine complete machine is measured.Engine can not so be learnt The level of each subsystem mechanical loss is bad, and design is improved and the direction of optimization is indefinite.

The content of the invention

For defect present in prior art or deficiency, the technical problems to be solved by the invention are：A kind of hair is provided The measuring method of motivation subsystem frictional work, with the measuring method, can bring improvement to the design of each subsystem of engine And optimization.

The technical scheme that the present invention takes is to provide a kind of measuring method of engine subsystems frictional work, including following step Suddenly：

A, the external machine oil external circulating device at oil filter, the external coolant external circulating device at water pump.

B, measurement crank shaft friction work(T_{Bent axle}, piston rod frictional work T_{Piston rod}, camshaft and timing chain frictional work T_Camshaft, drive Take offence the frictional work T of door_Valve, oil pump frictional work T_{Oil pump}, other train frictional works T_Train, complete machine frictional work T_{Complete machine}, pumping loss T_{Pump gas}；

C:The subsystem frictional work of like product is contrasted, is optimized for the higher subsystem of frictional work.

As a further improvement on the present invention, the optimization method includes reducing contact area and contact surface increase lower resistance Coating is locked.

As a further improvement on the present invention, the measurement crank shaft friction work(T_{Bent axle}Method：Bent axle is only installed, not installed Distribution, timing system and other motion annexes, are not installed into exhaust manifold, remaining engine part is normally assembled, and blocks cylinder cap Upper oil duct and crank-shaft link neck oilhole, stable oil temperature water temperature reaches to be measured after Standard.

As a further improvement on the present invention, the measurement piston rod frictional work T_{Piston rod}Method：Rubbed in measurement bent axle Wipe work(T_{Bent axle}On the basis of assemble piston rod, recover crank-shaft link neck oilhole, measure T_{Bent axle+piston rod}, T_{Piston rod}= T_{Bent axle+piston rod}- T_{Bent axle}。

As a further improvement on the present invention, the frictional work T of the measurement camshaft and timing chain_CamshaftMethod：Remove Piston rod, assembles camshaft and timing chain, recovers cylinder cap oil circuit, blocks crank-shaft link neck oilhole, measures T_{Bent axle+camshaft}, T_Camshaft= T_{Bent axle+camshaft}- T_{Bent axle}。

As a further improvement on the present invention, the frictional work T of the measurement driving valve_ValveMethod：Assemble valve and Tappet, measures T_{Bent axle+camshaft+valve}, T_Valve= T_{Bent axle+camshaft+valve}- T_{Bent axle+camshaft}。

As a further improvement on the present invention, other train frictional works of measurement T_TrainMethod：Oil pump is removed, is installed Train annex and water pump, measure T_{Bent axle+train}, T_Train=T_{Bent axle+train}-T_{Bent axle}。

As a further improvement on the present invention, the measurement pumping loss T_{Pump gas}=T_{Complete machine}-T_{Step B}。

The beneficial effects of the invention are as follows：The level that each subsystem mechanical loss of engine can be clear from is bad, is Design is improved and optimization provides direction, can also be evaluated the structurally consummate degree and adjustment assembly quality of engine, can also be commented Determine the uniformity of engine work.

Brief description of the drawings

Fig. 1 is the flow chart of the measuring method of inventive engine subsystem frictional work.

Embodiment

The present invention is further described for explanation and embodiment below in conjunction with the accompanying drawings.

As shown in figure 1, the present invention provides a kind of measuring method of engine subsystems frictional work, comprise the following steps：

A, the external machine oil external circulating device at oil filter, ensure normal lubricating condition, the external cooling at water pump Liquid external circulating device, ensures normal cooling.

The optimization method includes reducing contact area and contact surface increase lower resistance coating lock.

The measurement crank shaft friction work(T_{Bent axle}Method：Bent axle is only installed（It must install suitable with piston rod at connecting rod neck Counterweight）, uneasiness assembling gas, timing system and other motion annexes are not installed into exhaust manifold, remaining engine part is normal Assembling, blocks oil duct and crank-shaft link neck oilhole on cylinder cap, and stable oil temperature water temperature reaches to be measured after Standard.

The measurement piston rod frictional work T_{Piston rod}Method：In measurement crank shaft friction work(T_{Bent axle}On the basis of assemble work Connecting rod is filled in, recovers crank-shaft link neck oilhole, T is measured_{Bent axle+piston rod}, T_{Piston rod}= T_{Bent axle+piston rod}- T_{Bent axle}。

The frictional work T of the measurement camshaft and timing chain_CamshaftMethod：Remove piston rod, assemble camshaft and Timing chain, recovers cylinder cap oil circuit, blocks crank-shaft link neck oilhole, measures T_{Bent axle+camshaft}, T_Camshaft= T_{Bent axle+camshaft}- T_{Bent axle}。

The frictional work T of the measurement driving valve_ValveMethod：Valve and tappet are assembled, is measured

T_{Bent axle+camshaft+valve}, T_Valve= T_{Bent axle+camshaft+valve}- T_{Bent axle+camshaft}。

Other train frictional works of measurement T_TrainMethod：Oil pump is removed, train annex and water pump, measurement are installed T_{Bent axle+train}, T_Train=T_{Bent axle+train}-T_{Bent axle}。

The measurement pumping loss T_{Pump gas}=T_{Complete machine}-T_{Step B}。T_{Step B}Including crank shaft friction work(, piston rod frictional work, camshaft Frictional work, frictional work, oil pump frictional work, other train frictional works of driving valve with timing chain.

Result of the test shows that engine air valve device frictional work is higher, by optimization part, is decreased obviously oil consumption.

Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's Protection domain.

Claims

1. a kind of measuring method of engine subsystems frictional work, it is characterised in that：Comprise the following steps：

A, the external machine oil external circulating device at oil filter, the external coolant external circulating device at water pump；

B, measurement crank shaft friction work(T_{Bent axle}, piston rod frictional work T_{Piston rod}, camshaft and timing chain frictional work T_Camshaft, driving gas The frictional work T of door_Valve, oil pump frictional work T_{Oil pump}, other train frictional works T_Train, complete machine frictional work T_{Complete machine}, pumping loss T_{Pump gas}；It is described Measure crank shaft friction work(T_{Bent axle}Method：Bent axle is only installed, uneasiness assembling gas, timing system and other motion annexes are not installed into Exhaust manifold, remaining engine part is normally assembled, and blocks oil duct and crank-shaft link neck oilhole on cylinder cap, and stable oil temperature water temperature reaches Measured after to Standard；The measurement piston rod frictional work T_{Piston rod}Method：In measurement crank shaft friction work(T_{Bent axle}Basis On assemble piston rod, recover crank-shaft link neck oilhole, measure T_{Bent axle+piston rod}, T_{Bent axle+piston rod}For rubbing for crankshaft and piston connecting rod Wipe work(, T_{Piston rod}= T_{Bent axle+piston rod}- T_{Bent axle}；The frictional work T of the measurement camshaft and timing chain_CamshaftMethod：Piston is removed to connect Bar, assembles camshaft and timing chain, recovers cylinder cap oil circuit, blocks crank-shaft link neck oilhole, measures T_{Bent axle+camshaft}, T_{Bent axle+camshaft}For The frictional work of bent axle and camshaft, T_Camshaft= T_{Bent axle+camshaft}- T_{Bent axle}；The frictional work T of the measurement driving valve_ValveMethod：Dress Valve and tappet are prepared, T is measured_{Bent axle+camshaft+valve}, T_{Bent axle+camshaft+valve}For bent axle, the frictional work of camshaft and valve, T_Valve= T_{Bent axle+camshaft+valve}- T_{Bent axle+camshaft,}Other train frictional works of measurement T_TrainMethod：Oil pump is removed, train annex and water are installed Pump, measures T_{Bent axle+train}, T_{Bent axle+train}For bent axle and the frictional work of train, T_Train=T_{Bent axle+train}-T_{Bent axle}, the measurement pumping loss T_{Pump gas}= T_{Complete machine}-T_{Step B}；T_{Step B}For step B whole frictional works, including crank shaft friction work(T_{Bent axle}, piston rod frictional work T_{Piston rod}, camshaft With the frictional work T of timing chain_Camshaft, driving valve frictional work T_Valve, oil pump frictional work T_{Oil pump}, other train frictional works T_Train, complete machine Frictional work T_{Complete machine}, pumping loss T_{Pump gas}；

C, the subsystem frictional work for contrasting like product, are optimized, the optimization method bag for the higher subsystem of frictional work Include reduction contact area and contact surface increase lower resistance coating lock.