Whole vehicle functional safety monitoring system

Abstract

The invention discloses a whole vehicle functional safety monitoring system, which is a centralized whole vehicle functional safety monitoring system with a torque monitoring and an acceleration monitoring, an acceleration signal source is introduced for monitoring the instantaneous whole vehicle acceleration information in real time, the validity of the whole vehicle torque distribution control is considered by the torque comparison monitoring and the whole vehicle acceleration comparison monitoring, when the whole vehicle power system torque calculation and controlling occur an undesired torque increase, security protection can be carried out on the basis of the torque comparison information and the whole vehicle acceleration information of the current vehicle, so that the centralized monitoring of the vehicle functional safety can be realized; the whole vehicle functional safety monitoring system has the advantage that the requirement on the function safety level of the terminal power source controller is lowered, so that the complexity and cost of the monitoring system is reduced, and realization of the systematic design with the more higher functional security level is facilitated.

Description

technical field [0001] The invention relates to automobile safety technology, in particular to a vehicle function safety monitoring system. Background technique [0002] With the development of automobile energy saving and emission reduction technology, the automobile power control system has become increasingly complex, and has expanded from the traditional single power control system to the vehicle multi-power control system (such as hybrid power system and electric vehicle control system), figure 1 and figure 2 The structure diagrams of the whole vehicle power control system of hybrid electric vehicle and pure electric vehicle are respectively shown by figure 1 , figure 2 It can be seen that the power system control of the vehicle is controlled by the vehicle controller, engine controller, motor controller and battery management system. The core of the vehicle power system has been transferred from the traditional engine electronic controller to the vehicle controller...

AI Technical Summary

Problems solved by technology

[0010] In this related technology, a distributed torque monitoring structure is still used in the torque monitoring structure. The vehicle acceleration information used in the vehicle state monitoring function only comes from the vehicle speed signal, and there is no redundant verification signal to calibrate the acceleration information. Therefore, centralized vehicle status monitoring cannot be realized, so the functional safety level of the whole vehicle has not been effectively degraded and allocated, resulting in a significant increase in system complexity and system cost

[0011] It can be seen from the above that the existing vehicle functional safety monitoring system adopts a distributed functional safety monitoring structure based on torque distribution. Based on the requirements of the ISO 26262 standard, the distributed functional safety monitoring system usually adopts the following Figure 5 The topological structure of the functional safety level shown is complex and costly; the existing vehicle functional safety monitoring system adopts a similarity redundant functional safety software architecture design, which is not enough to meet more Functional safety design with high functional safety level

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