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Oil pump motor temperature estimation method and device

A technology of oil pump motor and oil temperature, which is applied in the field of automobile transmission system, can solve the problem of difficulty in estimating the temperature of the oil pump motor, and achieve the effect of reducing the difficulty of estimation

Active Publication Date: 2021-05-25
SAIC MOTOR
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the thermal path method is used to estimate the temperature of the oil pump motor. The accuracy of the estimated temperature of the oil pump motor depends on the thermal parameters of the oil pump motor. When the thermal parameters of the oil pump motor are insufficient, it is difficult to estimate the temperature of the oil pump motor.

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  • Oil pump motor temperature estimation method and device
  • Oil pump motor temperature estimation method and device

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Embodiment Construction

[0029] At present, the thermal circuit method is usually used to estimate the temperature of the key points of the oil pump motor in real time, so as to detect the temperature of the oil pump motor in real time. The thermal circuit method usually includes the following steps: first, establish a thermal circuit model of the key points of the oil pump motor, which includes heat source, thermal resistance, and heat capacity; then, calculate the thermal circuit according to the heat-related parameters such as the structure, size, and material of the oil pump motor. Parameters such as medium heat source, thermal resistance, heat capacity, etc., and then solve the thermal circuit model, so as to estimate the temperature of the oil pump motor.

[0030] However, using the thermal circuit method to estimate the temperature of the oil pump motor, the estimated temperature of the oil pump motor has a great dependence on the heat-related parameters of the oil pump motor, and it is difficul...

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Abstract

A method and device for estimating the temperature of an oil pump motor, the method comprising: obtaining input parameters, the input parameters including: the oil temperature of the oil pump motor, the temperature of the inverter of the oil pump motor, and the temperature variation of the inverter of the oil pump motor, the The temperature change of the oil pump motor inverter is the difference between the temperature of the oil pump motor inverter obtained at the current time and the temperature of the oil pump motor inverter obtained last time; select the membership function corresponding to each input parameter ; Using a preset fuzzy reasoning model, according to the membership function corresponding to each input parameter, calculate the temperature of the oil pump motor, and output the calculation result. By adopting the above solution, the difficulty of estimating the temperature of the oil pump motor can be reduced.

Description

technical field [0001] The invention relates to the technical field of automobile transmission systems, in particular to a method and device for estimating the temperature of an oil pump motor. Background technique [0002] The software of the oil pump motor of the Dual Clutch Transmission (DCT) includes three modules: control, diagnosis and thermal protection. The thermal protection module is used to monitor the temperature of the oil pump motor in real time, and implement thermal protection according to the thermal protection requirements of the oil pump motor. Among them, temperature monitoring is the basis for thermal protection of the oil pump motor. [0003] At present, the thermal circuit method is usually used to estimate the temperature of the key points of the oil pump motor in real time, so as to detect the temperature of the oil pump motor in real time. The thermal circuit method usually includes the following steps: First, establish a thermal circuit model of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 王治中
Owner SAIC MOTOR