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Circuit topological structure of EPBI electric control unit

A technology of circuit topology and electronic control unit, which is applied in the direction of program control, computer control, general control system, etc., can solve the problems of disregarding the hardware security mechanism, the product cannot pass the ISO26262 functional safety standard, etc., and achieve the effect of preventing damage

Pending Publication Date: 2020-01-07
ZHEJIANG ASIA PACIFIC MECHANICAL & ELECTRONICS
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  • Abstract
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Problems solved by technology

Therefore, the circuit design of the EPBI controller only considers meeting the requirements from the function, but does not consider the design of the necessary hardware security mechanism, then the product will inevitably fail to pass the ISO 26262 functional safety standard

Method used

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  • Circuit topological structure of EPBI electric control unit

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Embodiment Construction

[0034] Attached below figure 1 And embodiment further describe the present invention.

[0035] Such as figure 1 As shown, the MCU is powered by two independent step-down modules IC1 and IC2. The input voltage of IC1 and IC2 is powered by three wires connected in parallel at one point, and the three wires are 1-solenoid valve power supply, 2-motor power supply, and 3-ignition power supply. The advantage of using this method of power supply is that when one or two of them are blown by the fuse, the voltage at NODE1 is still 11.3V (the forward conduction voltage of the diode is 0.7V). It will not affect the power supply to the IC1 and IC2 modules. The output of IC1 and IC2 is 5V, which can ensure the normal operation of the MCU of the EPBI controller. The purpose of designing the three diodes D1, D2, and D3 is to isolate the three-wire power supply and take advantage of the unidirectional conductivity of the diodes. In the absence of a diode isolation design, a short circuit ...

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Abstract

The invention discloses a circuit topological structure of an EPBI electric control unit. Three lines are connected in parallel at a point for power supply, two independent buck modules IC1 and IC2 are used for supplying power to an MCU, and a bridge-type circuit or a solenoid valve is formed to be switched off by dual-path voltage redundancy power supply formed by a network 5V-1 and a network 5V-2. By the topological structure, the development demand of hardware circuit design of the EPBI control unit can be supported; and in the circuit topological structure, necessary hardware safety mechanism is designed, and the probability that a vehicle losses control to finally cause personal injury due to a hardware random failure is reduced.

Description

technical field [0001] The invention relates to a circuit topology structure of an EPBI electric control unit. Utilizing this topology can support the development of the hardware circuit design of the EPBI control unit. The circuit topology has designed the necessary hardware safety mechanism, which reduces the possibility of losing control of the vehicle and eventually causing personal injury due to random failure of the hardware. Background technique [0002] The EPB control unit and ESC control unit of a general passenger car are two independent control modules. With the constraints of vehicle cost and layout space, higher integration requirements are put forward for the electronic control unit. The EPBI control unit is the integration of the EPB control unit and the ESC control unit. Considering that the EPBI control unit controls the braking force of the vehicle, its failure will endanger personal safety, and with the implementation of the ISO 26262 functional safety ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 张杰郑航船孟宪策杨旭博
Owner ZHEJIANG ASIA PACIFIC MECHANICAL & ELECTRONICS
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