阅读说明：本技术 一种汽油发动机机油稀释试验方法 (Gasoline engine oil dilution test method ) 是由 汪杰强 黄勇 姚博炜 刘高领 张振培 张学文 于 2021-07-31 设计创作，主要内容包括：本发明公开了一种汽油发动机机油稀释试验方法,应用于汽车发动机技术领域,采用低温环境舱,浸冷发动机至机油温度达到预设温度T1；启动发动机,加速至预设转速A并保持固定时长t1；由预设转速A加速至预设转速B；以预设转速B持续运行直至发动机机油温度达到预设温度T2,停机；判断试验次数是否达到预设次数C,若达到试验次数,则结束试验,收集发动机机油,分析待用；若未达到试验次数,则重复以上步骤,直至达到试验次数。本发明采用低温环境舱使发动机的机油稀释试验不受气候和地域的影响,实现发动机机油稀释试验全天候,实时开展,降低试验成本。(The invention discloses a gasoline engine oil dilution test method, which is applied to the technical field of automobile engines, and adopts a low-temperature environment cabin to soak and cool an engine until the engine oil temperature reaches a preset temperature T1; starting the engine, accelerating to a preset rotation speed A and keeping the rotation speed A for a fixed time period t 1; accelerating from a preset rotating speed A to a preset rotating speed B; continuously operating at a preset rotating speed B until the temperature of engine oil of the engine reaches a preset temperature T2, and stopping the engine; judging whether the test times reach a preset time C, if so, ending the test, collecting engine oil, and analyzing for later use; if the test times are not reached, repeating the steps until the test times are reached. The engine oil dilution test of the engine is not influenced by climate and regions by adopting the low-temperature environment chamber, the engine oil dilution test of the engine is carried out all weather and in real time, and the test cost is reduced.)

1. A gasoline engine oil dilution test method is characterized in that a low-temperature environment chamber is adopted, and the method specifically comprises the following steps:

s1, cooling the engine until the temperature of the engine oil reaches the preset temperature T1;

s2, starting the engine, accelerating to a preset rotating speed A and keeping the rotating speed A for a fixed time period t 1;

s3, accelerating from a preset rotating speed A to a preset rotating speed B;

s4, continuously running at a preset rotating speed B until the temperature of engine oil reaches a preset temperature T2, and stopping the engine;

s5, judging whether the test frequency reaches the preset frequency C, if so, ending the test, collecting engine oil, and analyzing for later use; if the test times are not reached, repeating S1-S4 until the test times are reached.

2. The method for testing dilution of engine oil for a gasoline engine according to claim 1,

before step S1, the engine is mounted on a rack of the low-temperature environment compartment.

3. The method for testing dilution of engine oil for a gasoline engine according to claim 1,

in step S1, the coolant temperature and the gasoline temperature of the engine reach preset temperatures T1.

4. The method for testing dilution of engine oil for a gasoline engine according to claim 1,

the load control requirements during the test are as follows:

when the test times are singular, the load is 20%; the load was 30% when the number of tests was double.

5. The method for testing dilution of engine oil for a gasoline engine according to claim 1,

the low-temperature environment chamber provides a low-temperature environment for the test.

6. The method for testing dilution of engine oil for a gasoline engine according to any one of claims 1 to 5,

in the test process, the rotating speed, the torque, the air inlet pressure, the pressure of a crankcase, the temperature of engine oil, the temperature of cooling liquid and the ambient temperature of the engine are synchronously monitored.

Technical Field

The invention relates to the technical field of automobile engines, in particular to a gasoline engine oil dilution test method.

Background

At present, when an automobile runs in winter, the phenomenon that engine oil is increased due to dilution of engine oil possibly occurs, so that an engine oil dilution test needs to be carried out on the engine in the engine development stage, and the running reliability of the engine is ensured.

At present, almost all automobile manufacturers adopt cold areas from winter to north to carry out engine oil dilution tests, which increases the test cost, and the time period for carrying out the tests is short, thus being not beneficial to the development and research of engines.

Therefore, the technical problem to be solved urgently by the technical personnel in the field is to provide a gasoline engine oil dilution test method for overcoming the technical problems.

Disclosure of Invention

In view of the above, the invention provides a gasoline engine oil dilution test method, which enables an engine oil dilution test of an engine not to be influenced by climate and regions, realizes all-weather and real-time development of the engine oil dilution test, and reduces the test cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a gasoline engine oil dilution test method adopts a low-temperature environment cabin, and specifically comprises the following steps:

s1, cooling the engine until the temperature of the engine oil reaches the preset temperature T1;

s2, starting the engine, accelerating to a preset rotating speed A and keeping the rotating speed A for a fixed time period t 1;

s3, accelerating from a preset rotating speed A to a preset rotating speed B;

s4, continuously running at a preset rotating speed B until the temperature of engine oil reaches a preset temperature T2, and stopping the engine;

s5, judging whether the test frequency reaches the preset frequency C, if so, ending the test, collecting engine oil, and analyzing for later use; if the test times are not reached, repeating S1-S4 until the test times are reached.

Preferably, the engine is mounted on a rack of the low-temperature environment compartment before step S1.

Preferably, step S1 further includes that the temperature of the coolant and the temperature of the gasoline of the engine both reach the preset temperature T1.

Preferably, the load control during the test requires the following:

when the test times are singular, the load is 20%; the load was 30% when the number of tests was double.

Preferably, the low temperature environment chamber provides a low temperature environment for the test.

Preferably, during the test, the engine speed, torque, intake pressure, crankcase pressure, engine oil temperature, coolant temperature, and ambient temperature are monitored simultaneously.

(1) According to the technical scheme, compared with the prior art, the method for the dilution test of the engine oil of the gasoline engine provided by the invention has the advantages that the engine oil dilution test of the engine is not influenced by climate and regions by adopting the low-temperature environment chamber, the engine oil dilution test of the engine is carried out all weather and in real time, and the test cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a flow chart of a gasoline engine oil dilution test method of the present invention;

FIG. 2 is a flow chart of a method of an embodiment of the present invention;

FIG. 3 is a timing diagram of a method according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to the attached drawing 1, the invention discloses a gasoline engine oil dilution test method, which adopts a low-temperature environment chamber and specifically comprises the following steps:

s1, cooling the engine until the temperature of the engine oil reaches the preset temperature T1;

s2, starting the engine, accelerating to a preset rotating speed A and keeping the rotating speed A for a fixed time period t 1;

s3, accelerating from a preset rotating speed A to a preset rotating speed B;

s4, continuously running at a preset rotating speed B until the temperature of engine oil reaches a preset temperature T2, and stopping the engine;

s5, judging whether the test frequency reaches the preset frequency C, if so, ending the test, collecting engine oil, and analyzing for later use; if the test times are not reached, repeating S1-S4 until the test times are reached.

In one embodiment, prior to step S1, the engine is mounted on a skid of the low-temperature environment compartment.

In one embodiment, step S1 further includes that the temperature of the coolant and the temperature of the gasoline reach the preset temperature T1.

In one embodiment, the load control requirements during the test are as follows:

when the test times are singular, the load is 20%; the load was 30% when the number of tests was double.

In one embodiment, the low temperature environment chamber provides a low temperature environment for the test.

In one embodiment, engine speed, torque, intake pressure, crankcase pressure, oil temperature, coolant temperature, ambient temperature are monitored simultaneously during the test.

In another embodiment, referring to fig. 2, a method for testing dilution of gasoline engine oil is disclosed:

adopt low temperature environment cabin, use the engine pedestal that can adjust indoor temperature to test, simulate low temperature environment:

1) the test requires that the environmental temperature is-30 ℃, and the humidity is kept at the maximum humidity of the test room; (simulating winter outdoor environment);

2) soaking and cooling the engine between the test benches until the temperature of cooling liquid, engine oil and fuel oil reaches minus 30 +/-1 ℃; (simulating an automobile parking outdoors in winter);

the running condition of the engine under the running condition commonly used by the whole vehicle is adopted for testing:

1) starting the engine, and continuously operating for 5min at the cold start idle speed; (simulating a heat engine after the automobile is started in winter);

2) the engine is continuously operated at the engine speed of the normal working condition of the whole vehicle until the temperature of engine oil of the engine reaches 40 ℃, and then the vehicle is stopped. (simulating the car to stop after short-distance running in winter);

the method specifically comprises the following steps:

mounting an engine on a rack of a low-temperature environment cabin;

soaking and cooling the engine until the temperature of engine oil reaches a preset temperature A;

starting the engine, accelerating to 1200r/min within 10s, and keeping the rotating speed for running for 5 minutes;

accelerating the engine speed from 1200r/min to 2000r/min within 10 s;

continuously operating at 2000r/min until the temperature of engine oil reaches a preset temperature B, and stopping the engine;

judging whether the test times reach a preset time 30, if so, ending the test, collecting engine oil, and analyzing for later use; if the test times are not reached, repeating the steps until the test times are reached;

when the test times are singular, the load is 20%; when the test times are double, the load is 30 percent;

referring to fig. 3, a timing chart of the test of the present embodiment is shown.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention in a progressive manner. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.