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Power supply unit and car electronic control unit in car electronic control system

A technology of automotive electronics and control units, applied in control/regulation systems, electrical components, vehicle components, etc., can solve problems such as misjudgment and inability to use common ECUs, and achieve the effect of avoiding ECU misjudgments

Active Publication Date: 2014-07-16
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a power supply unit and an ECU (Electronic Control Unit, automotive electronic control unit) in an automotive electronic control system, to overcome the impact on the ECU due to load changes or circuit interference in the prior art. When the voltage signal is output to the car sensor, it cannot be used in different systems and it is easy to make the ECU misjudgment.

Method used

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  • Power supply unit and car electronic control unit in car electronic control system
  • Power supply unit and car electronic control unit in car electronic control system
  • Power supply unit and car electronic control unit in car electronic control system

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Please refer to the attached figure 1 , is a block diagram of a power supply unit 100 in an automotive electronic control unit disclosed in the present invention.

[0060] The power supply unit 100 is a power supply unit with protection, which mainly includes: a step-down module 102 connected in series and a controllable voltage follower module 103 with protection.

[0061] The step-down module 102 receives the first voltage Vprot, processes the first voltage Vprot according to preset step-down conditions, and outputs the obtained second voltage Vin to the controllable voltage follower module 103 with protection.

[0062] Wherein, the first voltage Vprot is a voltage after being protected against power reverse connection, surge, ESD, and load dump. According to the preset step-down condition, the step-down module 102 processes the first voltage Vprot, so that the second voltage Vin obtained after processing can be adapted to automobile systems under different working c...

Embodiment 2

[0067] Please refer to the attached figure 2 , is a block diagram of another power supply unit 100 in an automotive electronic control unit disclosed in the present invention.

[0068] The protected power supply unit 100 is a protected power supply unit, mainly comprising: an inlet power supply protection module 101 , a step-down module 102 and a controllable protected voltage follower module 103 connected in series.

[0069] see image 3 , is a schematic circuit diagram of the inlet power supply protection module 101 . The circuit corresponding to the inlet power supply protection module includes: a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2 and a third diode D3.

[0070] The specific connection relationship of each component in the circuit is:

[0071] One end of the first capacitor C1 is connected in series with one end of the second capacitor C2, the other end of the first capacitor C1 is connected to the vehicle power supply Vbat, a...

example 1

[0083] When the step-down module 102 processes the first voltage Vprot, the current preset step-down condition, that is, the current working condition is when the power supply unit is applied to the ECU of the 24V automotive system, or the controllable protected When the voltage follower module is in an over-temperature protection state, the over-temperature protection state exists when the power consumed by the controllable voltage follower module with protection is too large.

[0084] At this time, only welding such as Figure 4 The shown emitter-follower circuit (also known as a series voltage regulator circuit) composed of the first triode Q1, the first resistor R1, and the fourth regulator D4.

[0085] The collector of the first triode Q1 is connected to the input end of the step-down module 102, the first voltage Vprot is input from the input end of the step-down module, and the emitter is connected to the output of the step-down module 102 terminal, for outputting the ...

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PUM

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Abstract

The invention discloses a power supply unit and a car electronic control unit in a car electronic control system. The power supply unit comprises a voltage reduction module and a controllable voltage follow-up module with protection, wherein the voltage reduction module and the voltage follow-up module are sequentially connected; the voltage reduction module is used for processing received first voltage according to a preset voltage reduction condition and outputting obtained second voltage to the controllable voltage follow-up module with protection, and the second voltage is filtered by the voltage follow-up module; and the second voltage is stabilized by following up reference voltage of an AD (Analog-Digital) reference source in the car electronic control unit to obtain sensor voltage which is supplied to a car sensor. According to the invention, through the dual voltage reduction of the voltage reduction module and the controllable voltage follow-up module with protection, the whole car electronic control system has the advantages of high voltage resistance and overcurrent prevention by utilizing the high voltage resistance characteristic of the voltage reduction module and the overcurrent prevention characteristic of the controllable voltage follow-up module with protection, so that the purpose of stably supplying power to the car sensor is achieved, and the purposes of generally using the power supply unit in different systems and avoiding misjudgment of the car electronic control unit are also achieved.

Description

technical field [0001] The present invention relates to the technical field of automotive electronic control, and more specifically relates to a power supply unit and an ECU (Electronic Control Unit, automotive electronic control unit) in an automotive electronic control system. Background technique [0002] With the continuous development of electronic technology and the continuous improvement of the electronic degree of automobiles, the traditional mechanical control system has been gradually replaced by the electronic control system of automobiles. As the information source of the automotive electronic control system, automotive sensors are key components of the automotive electronic control system. They are mainly used in the engine control system, chassis control system, body control system and navigation system. Acceleration, vibration and other information are measured in real time and accurately to assist the vehicle operator in controlling the vehicle. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/02H02M3/155
Inventor 熊延萍俞松耀王娜刘诗涵
Owner BEIJING JINGWEI HIRAIN TECH CO INC