Fault diagnosis method, piston cooling system and vehicle
A technology for piston cooling and fault diagnosis, applied in the directions of piston, liquid cooling, engine cooling, etc., can solve the problems of high cost and requirements on the installation position of the pressure switch, and achieve the effect of reducing the number of signal sources
Active Publication Date: 2022-06-28
UNITED AUTOMOTIVE ELECTRONICS SYST
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Problems solved by technology
[0006] The purpose of the present invention is to provide a fault diagnosis method, a piston cooling system and a vehicle to solve the problem that the fault diagnosis method in the prior art needs to install a pressure switch, and the cost brought by the pressure switch is relatively high, and the installation position of the pressure switch is limited. Questions that are more demanding and require additional diagnostics for pressure switches
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[0037] In order to make the objects, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, each drawing needs to show different emphases, and sometimes different scales are used.
[0038] As used herein, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally employed in its sense including "and / or", and the term "a number" It is usually used in the sense including "at least one", the term "at least two" is usually used in the sense including "two or more", in addition, the ...
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The invention provides a fault diagnosis method, a piston cooling system and a vehicle. Wherein, the fault diagnosis method includes the following steps: judging whether the first reasonable fault exists in the piston cooling assembly according to the characteristic signal within the first preset time period after the oil control valve is opened; It is judged whether the piston cooling component has the second reasonable fault by the characteristic signal within the second preset time period. By analyzing the signal changes of the characteristic signal after the oil control valve is opened and closed, it is directly judged whether there is a fault in the piston cooling assembly, which reduces the number of signal sources required for fault judgment and solves the need for fault diagnosis methods in the prior art The pressure switch is installed, and the cost caused by the pressure switch is high, the requirements for the installation position of the pressure switch are high, and the pressure switch needs additional diagnosis.
Description
technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a fault diagnosis method, a piston cooling system and a vehicle. Background technique [0002] The working environment of the engine is very harsh, so in order to ensure the reliability, durability and economy of the engine, the engine must be well cooled. Among them, the piston is one of the worst working parts in the engine, so now the piston cooling nozzle is usually used to spray oil to reduce the thermal load of the piston. With the development of engine technology, piston cooling nozzle technology and continuously variable oil pump technology have gradually become the basic configuration of the engine. Please refer to figure 1 , figure 1 It is a schematic diagram of the structure of a piston cooling nozzle assembly. Taking a four-cylinder engine as an example, the piston cooling nozzle assembly includes the oil control valve 3, the auxiliary oil pass...
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IPC IPC(8): F02F3/22F01M9/00F01P3/10F02B77/08
CPCF02F3/22F01M9/00F01P3/10F02B77/08F02B77/089
Inventor 孟维庄兵骆海建翁乙文
Owner UNITED AUTOMOTIVE ELECTRONICS SYST