A clutch solenoid valve control circuit and method

Abstract

The invention relates to the field of vehicle power transmission and specifically relates to a pressure solenoid valve control circuit and method used for transmission in a fuel vehicle or a severe hybrid vehicle clutch. The circuit comprises a main processor, a slave processor, a driving switching-off circuit, a driving circuit and a solenoid valve. The main processor and the slave processor are connected through an SPI bus. The slave processor is used for monitoring the main processor in real time. The driving circuit is connected with the main processor and the solenoid valve and is used for controlling the solenoid valve. The driving switching-off circuit is connected with the main processor, the slave processor and the driving circuit and is used for receiving signals from the main processor and the slave processor and forbidding or enabling the driving circuit according to the signals from the main processor and the slave processor. According to the invention, the solenoid valve control circuit with a high safety level is provided.

Description

Technical field [0001] The invention relates to the field of vehicle power transmission, in particular to a pressure solenoid valve control circuit and method used for the transmission function in the clutch of a fuel vehicle or a heavy hybrid vehicle. Background technique [0002] The addition of the electric motor as a new power source in hybrid electric vehicles enables the vehicle control system to control the power transmission system under different vehicle motion conditions (such as starting, idling, etc.) so that the motor or engine can participate in the drive of the vehicle in a timely manner , Thereby improving the fuel economy of vehicles, and further enabling vehicles to cope with a variety of complex application environments. [0003] For the P2 hybrid technology solution for heavy hybrid vehicles (the motor is placed at the clutch input), it is necessary to add a power coupling and disconnecting component to the power transmission component. This power coupling and d...

AI Technical Summary

Problems solved by technology

[0005] 1. The solenoid valve driving control circuit scheme of the customized chip has a complex circuit structure, which is not conducive to the autonomy and mass production of domestic OEMs or parts manufacturers in the core control field of severe hybrid electric vehicle power transmission

[0006] 2. The original solenoid valve component drive control circuit focused on the drive of the solenoid valve, which was insufficiently considered from the perspective of system functional safety, and could not take into account the relevant functional safety level requirements of ISO 26262 ASIL-C, that is, the controller has the ability to respond to various failure modes. Capability of solenoid actuated function cut-off or redundant control

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