Method, device and system for preventing false alarm of engine oil pressure in cold start
A technology of engine oil pressure and cold start, which is applied in the direction of pressure lubricating safety devices, etc., can solve the problems of engine misreporting oil pressure and user troubles, and achieve the effect of prolonging the detection time and preventing low temperature false reporting of low oil pressure faults
Active Publication Date: 2020-11-03
WEICHAI POWER CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to at least solve the problem that when the ambient temperature of the existing engine is low, the engine falsely reports low engine oil pressure failure during the cold start process, causing troubles to the user
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[0039] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0040] It should be understood that terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated fea...
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The invention belongs to the technical field of engines, and particularly relates to a method, device and system for preventing false alarm of engine oil pressure in cold start. The method for preventing the false alarm of the engine oil pressure in cold start comprises the following steps that a fault detection unit is controlled to be started according to the fact that the running time value ofan engine is larger than the fault non-detection time value and the current temperature value of the environment temperature is larger than the preset temperature value; or the fault detection unit iscontrolled to be started according to the fact that the current pressure value of engine oil is larger than the preset pressure value. According to the method for preventing the false alarm of the engine oil pressure in cold start, the fault detection unit is controlled to be started according to the fact that the operation time value of the engine is larger than the fault non-detection time value and the current temperature value of the environment temperature is larger than the preset temperature value, so that the false alarm of an engine oil pressure fault when the environment temperatureis too low can be prevented; or the fault detection unit is controlled to be started according to the fact that the current pressure value of the engine oil is larger than the preset pressure value,so that the false alarm of the engine oil pressure fault when the engine oil pressure is too low can be prevented.
Description
technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a method, device and system for preventing false reporting of engine oil pressure during cold start. Background technique [0002] During the starting process of the engine, the oil is quickly filled into the oil passage by the oil pump to lubricate each friction pair in time. After the engine starts successfully, the ECU controller detects the establishment of the oil pressure through the oil pressure sensor to judge the current state of the oil pressure. [0003] The limit allowable temperature of engine oil is -35°C. When the ambient temperature is -40°C, the low-temperature dynamic viscosity of the engine oil increases, the speed at which the engine oil enters the hole of the oil pressure sensor decreases, and the ability of the oil pressure sensor to sense the oil pressure decreases, resulting in cold start During the process, the engine falsely reported a low o...
Claims
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IPC IPC(8): F01M1/20F01M1/18
CPCF01M1/18F01M1/20
Inventor 司福帅王兴元张宏涛
Owner WEICHAI POWER CO LTD