Method and device for detecting internal leakage of engine gas injection valve
A technology of gas injection valve and detection method, which is applied to fuel injection device, engine test, measurement device, etc., can solve the problems of detection of the working condition of injection valve, detection of internal leakage of injection valve, etc., and achieves the best performance state. Effect
Active Publication Date: 2022-01-25
WEICHAI POWER CO LTD
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Problems solved by technology
However, this solution cannot detect the internal leakage of the injection valve, and cannot accurately detect the working condition of the injection valve when the engine is in an oxygen closed loop
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[0049] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0050] In the embodiments of the present invention, "at least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and / or B, which can mean: A exists alone, A and B exist simultaneously, and B exists independently. A, B can be singular o...
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The embodiment of the present application provides a method and device for detecting the internal leakage of the engine gas injection valve. When detecting the internal leakage of the engine gas injection valve, first determine that the engine is in an idle state, and detect the gas injected by the gas injection valve. The amount of gas; then collect the oxygen concentration in the exhaust gas discharged from the engine; and determine whether the engine gas injection valve has internal leakage according to the amount of gas injected by the gas injection valve and the oxygen concentration in the exhaust gas; finally output the detection result, that is, in the existing engine equipment Based on the detection and analysis of the oxygen concentration in the exhaust gas and the amount of gas injected by the gas injection valve, the detection of the internal leakage of the engine gas injection valve is realized, so that the engine is in the best performance during operation state.
Description
technical field [0001] The invention relates to the technical field of engine gas injection valves, in particular to a method and device for detecting internal leakage of engine gas injection valves. Background technique [0002] Facing the increasingly severe energy and environmental situation, as well as increasingly demanding emission regulations, energy saving and emission reduction have become the trend of engine development. Gas fuel engines have been widely used due to their low emissions and good power performance. The gas injection valve is an important executive component of the gas supply system of the gas fuel engine, and the internal leakage of the gas injection valve will have a great impact on the performance of the engine. impact, resulting in environmental pollution. [0003] In order to solve the problem of internal leakage of gas injection valves, in the prior art, a certain injection valve is opened, and other injection valves are closed, and the working...
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IPC IPC(8): F02M65/00
CPCF02M65/006
Inventor 周飞章鹿雪文贾瑞
Owner WEICHAI POWER CO LTD