A monitoring system of mixing dynamical vehicle torsional moment

Abstract

The invention describes a safety monitoring system and a monitoring method for the torque output by a power assembly of a hybrid vehicle. The safety monitoring system and the monitoring method can be used for preventing the entire output torque from increasing and reducing accidently to provide relatively reliable protection for every module in the hybrid system, thereby ensuring the safety performance of the hybrid system. The torque monitoring of the safety monitoring system relates to three main controllers, including a hybrid control unit, an engine management system and the hybrid safety monitoring system, and respectively monitors the real output torque of the entire vehicle, a motor and the engine; the system can monitor the entire torque in normal mode and failure mode; the monitoring in normal mode can ensure the accurate explain of the entire real output torque; while the monitoring in failure mode can limit the entire real entire output torque.

Description

technical field [0001] The present application relates to the field of safety control of hybrid electric vehicles, in particular to a torque monitoring system for hybrid electric vehicles. Background technique [0002] With the current global warming phenomenon becoming more and more serious, and the increasingly tense contradiction between oil supply and demand, "environmental protection and energy saving", "perfect harmony between people, vehicles and nature" have already become public topics in the automotive industry. [0003] The hybrid electric vehicle reasonably combines the motor and the engine drive system, takes advantage of the motor drive to make up for the weakness of the engine drive, keeps the engine working in the best working condition, and can realize engine idle stop, auxiliary drive and regenerative braking Energy recovery and other functions. Therefore, the hybrid vehicle not only improves the driving performance of the vehicle, saves energy consumption...

AI Technical Summary

Problems solved by technology

[0004] However, the control of hybrid electric vehicles is more complicated. Compared with ordinary vehicles, special safety control issues need to be considered. The main points are as follows: ①Start the engine when the power system is engaged; ②The engine stops or stalls unexpectedly; ③The engine starts unexpectedly; ④The engine Unable to restart; ⑤ Unexpected drive torque increase; ⑥ Unexpected drive torque decrease; ⑦ Unexpected brake torque decrease

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