A kind of glow plug drive and protection circuit of diesel engine air intake heating device

A technology of protection circuit and power drive circuit, applied in the direction of machine/engine, mechanical equipment, engine ignition, etc., can solve the problem of difficult to meet the air intake heating performance, surface temperature drop, etc., to reduce the incidence of fire, reliable use. Effect

Active Publication Date: 2020-11-03
CHINA NORTH ENGINE INST TIANJIN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that it is sensitive to the change of working voltage, especially when the voltage is low, its surface temperature will drop sharply, which is difficult to meet the air intake heating performance caused by the battery voltage drop when the diesel engine is started.

Method used

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  • A kind of glow plug drive and protection circuit of diesel engine air intake heating device
  • A kind of glow plug drive and protection circuit of diesel engine air intake heating device

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Embodiment Construction

[0021] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] A diesel engine intake heating device glow plug drive and protection circuit, such as figure 1 and figure 2 As shown, it includes microcontroller 1, level conversion and overcurrent shutdown circuit 2, power drive circuit 3, current sampling circuit 4, overcurrent detection circuit 5 and glow plug 6, and the PWM output port of the microcontroller 1 The signal is connected to the first input terminal of the level conversion and overcurrent shutdown circuit 2, and the output signal of the level conversion and overcurrent shutdown circuit 2 is connected to the input terminal of the power drive circuit 3, so The output signal of the power drive circuit 3 is respectively connected t...

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Abstract

The invention provides an electric heating plug driving and protecting circuit of a diesel engine air inlet heating device. The circuit comprises a micro-controller, wherein a PWM output port of the micro-controller is in signal connection with the input end of a level conversion and over-current turn-off circuit; the output end of the level conversion and over-current turn-off circuit is in signal connection with the input end of the power drive circuit, the output ends of the power driving circuit are correspondingly in signal connection with an electric heating plug and a current sampling circuit; and the output ends of the current sampling circuits are correspondingly connected to the A / D input port of the micro-controller and the input end of an over-current detection circuit, and theoutput ends of the over-current detection circuit are in signal connection with an interrupt input port of the micro-controller and the input end of the level conversion and over-current turn-off circuit. According to the electric heating plug driving and protecting circuit of the diesel engine air inlet heating device, a software interrupt and hardware turn-off technology is adopted, so that when over-current occurs, the circuit can be reliably switched off, and the over-current protection function of the load is realized.

Description

technical field [0001] The invention belongs to the technical field of vehicle diesel engine air intake system control, and in particular relates to a glow plug drive and protection circuit of a diesel engine intake air heating device. Background technique [0002] Due to its particularity, vehicle diesel engines are required to work in all-weather and all-region fields. Especially in the low temperature environment, it is a huge test to start the diesel engine, so it is necessary to preheat the air entering the cylinder of the diesel engine in advance. This often requires the help of a set of air intake heating device to improve the ignition performance of the diesel engine when starting. In the field of automotive diesel engine applications, a large amount of flammable and explosive materials such as diesel oil, engine oil, cables, and power supplies are used, which are extremely prone to fires. Strictly preventing the occurrence of fires is a powerful guarantee for the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P19/02
CPCF02P19/021F02P19/027
Inventor 杨俊恩孟长江王增全范燕朝姚素娟
Owner CHINA NORTH ENGINE INST TIANJIN
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