Microcomputer monitoring device, electronic control device and method for monitoring microcomputer

A microcomputer and monitoring device technology, which is applied in the field of microcomputer monitoring devices, can solve problems such as malfunctions and achieve the effect of suppressing malfunctions

Active Publication Date: 2013-07-03
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The appropriate range of the power supply voltage of the microcomputer is determined. If the power supply voltage exceeds the appropriate range, the microcomputer will not work normally, and the electrical load may malfunction.

Method used

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  • Microcomputer monitoring device, electronic control device and method for monitoring microcomputer
  • Microcomputer monitoring device, electronic control device and method for monitoring microcomputer
  • Microcomputer monitoring device, electronic control device and method for monitoring microcomputer

Examples

Experimental program
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Embodiment 1

[0033] figure 1 It is a block configuration diagram showing a schematic configuration of the electronic control device according to the first embodiment. The electronic control device 1 is mounted on a vehicle, and is a control unit that controls an electrical load 2 of the vehicle. A vehicle equipped with the electronic control unit 1 has a battery (BATT) 3 that supplies electric power to electric loads in various parts of the vehicle. A power line 4 is connected to the storage battery 3, and an ignition switch (IGSW) 5 is mounted on the power line 4.

[0034] When the ignition switch 5 is turned on, electric power is supplied from the battery 3 to the electronic control unit 1 via the power line 4 . The electrical load 2 can be listed as follows, for example, a drive motor for adjusting the opening of the electronic throttle valve, a starter motor related to the idle stop (exhaust gas emission reduction driving) function, etc., but it is not limited thereto. In addition, ...

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PUM

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Abstract

The invention provides a technology of a microcomputer monitoring device. The effect of the device is that when a microcomputer is applied excessive voltage, malfunction generated by electrical loads controlled by the microcomputer can be restrained. The microcomputer monitoring device is used to monitor microcomputers which are provided with power voltage by a power supply and output operating electricity (driving electricity) to the electrical loads. The device comprises a voltage monitoring portion, and a switching signal output portion. The voltage monitoring portion monitors the power voltage applying on the microcomputers from the power supply. The switching signal output portion outputs switching signals to a switching portion. The switching portion switches over cut-off and cut-off and removal of the operating electricity output by the microcomputers to the electrical loads. Under a condition that the power voltage monitored by the voltage monitoring portion is higher than specified first voltage, the switching signal output portion outputs a cut-off signal to the switching portion. The cut-off signal is used to cut off the operating electricity output by the microcomputer.

Description

technical field [0001] The invention relates to a microcomputer monitoring device, an electronic control device and a microcomputer monitoring method. Background technique [0002] An electronic control unit (ECU) mounted on a vehicle controls various electrical loads using output signals from a microcomputer. The appropriate range of the power supply voltage of the microcomputer is fixed, and if the power supply voltage exceeds the appropriate range, the microcomputer may not operate normally, and electrical loads may malfunction. [0003] Vehicle-mounted electronic control devices are required to have high fail-safe performance. In this regard, an electronic control device is known, which is equipped with a microcomputer monitoring device (monitoring device) for monitoring the operation of the microcomputer and the power supply voltage applied to the microcomputer. circuit) (for example, refer to Patent Documents 1-4). For example, a well-known microcomputer monitoring d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/28
Inventor 小宫基树木户启介小松和弘
Owner FUJITSU GENERAL LTD
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