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Thermostat fault diagnosis method and device, computer equipment and storage medium

A technology of fault diagnosis and thermostat, which is applied in mechanical equipment, fault prevention, measuring devices, etc., can solve the problem of high cost of thermostat diagnosis method, achieve the effect of reducing manpower and resource costs and accurate judgment results

Active Publication Date: 2018-04-24
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology

[0005] Based on this, it is necessary to provide a method, device, computer equipment and storage medium for diagnosing whether there is a fault in the thermostat without establishing a water temperature model for the problem that the diagnostic method of the thermostat is too expensive

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  • Thermostat fault diagnosis method and device, computer equipment and storage medium
  • Thermostat fault diagnosis method and device, computer equipment and storage medium
  • Thermostat fault diagnosis method and device, computer equipment and storage medium

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0049] Compared with the National V OBD (On-BoardDiagnostic, on-board diagnostic system) regulations, the National VI OBD regulations, which began to be trialed in 2018, are stricter on the diagnosis of the cooling system, adding the requirement for thermostat diagnosis, that is, after the engine starts. Time or equivalent calculation time, the coolant temperature cannot reach the maximum temperature required by the OBD system for other requirements or does not reach the warm-up temperature (the definition of warm-up temperature is within the 11-degree deviation range of th...

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Abstract

The invention relates to a thermostat fault diagnosis method. The thermostat fault diagnosis method comprises the steps that the current environment temperature and the boundary temperature and initial starting temperature corresponding to the current environment temperature are obtained; engine heat balance state data determined based on cooling liquid temperature change data in an engine are obtained; the current cooling liquid temperature is obtained; and according to the relationship between the engine heat balance state data and current cooling liquid temperature and the boundary temperature and initial starting temperature, whether a thermostat has faults or not is judged. By means of the above method, whether the thermostat has the faults or not can be judged without building a water temperature model, the judgment result is accurate, needs of a large amount of standardization work is avoided, and manpower and resource cost can be reduced. In addition, a device, computer equipment and a storage medium are further included.

Description

technical field [0001] The invention relates to a fault diagnosis method for automobile equipment, in particular to a fault diagnosis method, device, computer equipment and storage medium for a thermostat in an engine. Background technique [0002] In automotive equipment, the thermostat automatically adjusts the amount of water entering the radiator according to the temperature of the coolant, changes the circulation range of the coolant, and adjusts the heat dissipation capacity of the cooling system to ensure that the engine works within a suitable temperature range. The thermostat must be kept in good technical condition, otherwise it will seriously affect the normal operation of the engine. If the main valve of the thermostat is opened too late, it will cause the engine to overheat; if the main valve is opened too early, the engine warm-up time will be prolonged and the engine temperature will be too low. [0003] At present, the thermostat diagnosis technology is main...

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Application Information

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IPC IPC(8): F01P11/14
CPCF01P11/14F01P2031/00F01P7/16F01P11/16F01P2031/20F01P2025/13
Inventor 曾姣乔艳菊白振霄连学通苏庆鹏刘巨江
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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