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Fault diagnosis method, piston cooling system and vehicle

A technology for fault diagnosis and piston cooling, which is applied in the direction of piston, liquid cooling, engine cooling, etc., and can solve problems such as high cost and requirements for the installation position of pressure switches

Active Publication Date: 2021-05-07
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Fault diagnosis method, piston cooling system and vehicle
  • Fault diagnosis method, piston cooling system and vehicle

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Embodiment Construction

[0037] In order to make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0038] As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is usually used in the sense of including "and / or", and the term "several" Usually, the term "at least one" is used in the meaning of "at least one", and the term "at least two" is usually used in the meaning of "two or more". In a...

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Abstract

The invention provides a fault diagnosis method, a piston cooling system and a vehicle. The fault diagnosis method comprises the following steps that whether a first rationality fault exists in a piston cooling assembly or not is judged according to a characteristic signal within a first preset duration after an engine oil control valve is opened; and whether a second rationality fault exist in the piston cooling assembly or not is judged according to the characteristic signal within a second preset duration after the engine oil control valve is closed. Whether the piston cooling assembly breaks down or not is directly judged by analyzing the signal changes of the characteristic signals after the engine oil control valve is opened and closed, the number of signal sources needed for fault judgment is reduced, and the problems that a pressure switch needs to be additionally arranged in a fault diagnosis method in the prior art, due to the pressure switch, the cost is high, the requirement for the mounting position of the pressure switch is high, and the pressure switch further needs to be diagnosed additionally are solved.

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 work, 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 heat 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 structural schematic diagram 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 passage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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