Vehicle functional safety monitoring system

A technology for functional safety and monitoring system, applied in the field of automobile safety, can solve the problems of power system complexity and system cost increase, and achieve the effect of reducing complexity and cost

Active Publication Date: 2017-08-25
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distributed monitoring structure based on torque distribution cannot achieve the degradation and decomposition of the vehicle's functional safety level, which leads to a significant increase in the complexity and system cost of the entire power system

Method used

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  • Vehicle functional safety monitoring system
  • Vehicle functional safety monitoring system
  • Vehicle functional safety monitoring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Vehicle functional safety monitoring system, such as Figure 7 As shown, it includes an acceleration signal source and a main control module 11;

[0038] The acceleration signal source is used to output the instantaneous acceleration of the vehicle to the main control module 11;

[0039] The main control module 11 includes a power control module 111 and a safety acceleration monitoring module 113;

[0040] The power control module 111 is used to calculate the driver's wheel-end demand torque of the vehicle power system, decompose the driver's wheel-end demand torque of the vehicle power system into engine demand torque and motor demand torque, and distribute the engine demand torque to The engine electronic controller distributes the required torque of the motor to the motor controller, and controls the drive chain clutch to work; if it receives the functional safety fault response of the safety acceleration monitoring module 113, it controls to disconnect the drive ch...

Embodiment 2

[0047] Based on the first embodiment, the vehicle functional safety monitoring system further includes a monitoring module 12;

[0048] The monitoring module 12 communicates with the main control module 11 to monitor whether the power control module 111 and the safety acceleration monitoring module 113 are normal. If there is a hardware failure in the module 11, the reset of the main control module 11 is triggered.

[0049] In the vehicle functional safety monitoring system of Embodiment 2, the monitoring module 12 is a hardware monitoring layer, which is mainly responsible for monitoring the main control module 11, preventing logical or temporal failure of the main control module from causing torque calculation errors and causing abnormalities in the vehicle. Expected Accelerated Risk. When the power control module 111 and the safety acceleration monitoring module 113 are not operating normally or there is a hardware failure in the main control module 11, a fault response at...

Embodiment 3

[0051] Based on the vehicle functional safety monitoring system of Embodiment 1, the safety acceleration monitoring module 113 calculates and diagnoses the actual vehicle instantaneous acceleration according to the vehicle instantaneous acceleration information transmitted from the acceleration signal source and the vehicle speed signal;

[0052] If the deviation between the instantaneous acceleration calculated based on the vehicle instantaneous acceleration information transmitted from the acceleration signal source and the instantaneous acceleration calculated based on the vehicle speed signal is within a certain threshold range, it is determined that the acceleration detection information is valid, and the actual instantaneous acceleration of the vehicle under the current working condition is determined. acceleration;

[0053] If the instantaneous acceleration calculated based on the vehicle instantaneous acceleration information transmitted from the acceleration signal sou...

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Abstract

The invention discloses a full-vehicle function safety monitoring system. The full-vehicle function safety monitoring system is a centralized full-vehicle function safety monitoring system capable of realizing acceleration monitoring; an acceleration signal source is introduced, so that full-vehicle transient acceleration information can be monitored in real time, and correctness of full-vehicle torque distribution control is evaluated according to the full-vehicle transient acceleration information monitored through the acceleration signal source; when torque is unexpectedly increased during calculation and control on the torque of a full-vehicle power system, safety protection is performed based on the transient acceleration information of a current vehicle, accordingly, centralized monitoring of the full-vehicle function safety is realized, the function safety level requirement for a terminal power source controller is reduced, the function safety degradation of the full vehicle is realized, and the complexity and the cost of the monitoring system are reduced.

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 They are schematic diagrams of the vehicle power control system structure of a hybrid vehicle and a pure electric vehicle respectively. It can be seen from the figure 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 power control system wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W50/038B60W40/107B60W20/10
CPCB60W10/02B60W10/06B60W10/08B60W20/50B60W40/107B60W50/038B60W2710/02B60W2710/0666B60W2710/083B60W2720/106
Inventor 于世涛张威郭辉蒋云李君吴利民
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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