A driving circuit of a diesel engine position control actuator

A driving circuit and actuator technology, which is applied in engine control, machine/engine, fuel injection control, etc., can solve the problems of excessive drive current, response and no consideration, etc., and achieve strong signal anti-interference ability, easy to implement, The effect of easy selection of types

Active Publication Date: 2021-10-26
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a fuse is installed as an overcurrent protection measure in this technology, the fusing current of the fuse is a fixed value, which is only for overcurrent protection when the excitation power supply is short-circuited, and cannot respond to excessive driving current caused by other conditions. When the fuse When blown, the device needs to be disassembled to replace the fuse
And this technology does not consider how to turn off the drive circuit switch to stop the actuator when the drive signal fails

Method used

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  • A driving circuit of a diesel engine position control actuator
  • A driving circuit of a diesel engine position control actuator
  • A driving circuit of a diesel engine position control actuator

Examples

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Embodiment Construction

[0037] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0038] combine Figure 1-4 , the present invention provides a drive circuit for a diesel engine position actuator, such as figure 1 As shown, it includes drive signal input circuit, overcurrent protection circuit, drive current feedback circuit, pulse feedback circuit and emergency stop signal input circuit. The drive signal input circuit includes a drive pulse width input circuit and a drive enable input circuit. figure 2 It is a schematic diagram of a driving circuit of a diesel engine electromagnetic position actuator, and the driving pulse width input circuit includes an optocoupler isolation circuit I and a MOSFET switch logic circuit I. The optocoupler isolation circuit I includes an optocoupler U7, the pin 1 of U7 is connected to one end of the pull-up resistor R16, and the pin 2 of the optocoupler U7 is connected to the pull-up resistor R57 and the conn...

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Abstract

The object of the present invention is to provide a drive circuit for a diesel engine position control actuator, including a drive signal input circuit, an overcurrent protection circuit, a drive current feedback circuit, a pulse feedback circuit and an emergency stop signal input circuit. The advantages of the present invention are: 1) use optocoupler and MOSFET as the main logic transformation elements to realize the output of drive logic, the type of components is simple and easy to implement; 2) the system can control PWM according to the feedback drive current and drive pulse The signal is adjusted to realize the automatic adjustment of the system; 3) It has an over-current protection function. When the current is too large, the over-current protection circuit can turn off the low-end control switch Q8 of the actuator to prevent the circuit from being damaged due to excessive current. 4) When the drive When the circuit fails, through the emergency stop signal input circuit, the actuator will be closed in time independently, which has the function of safety protection.

Description

technical field [0001] The invention relates to an electronic control device for a diesel engine, in particular to an electronic control actuator for a diesel engine. Background technique [0002] With the rapid development of electronic devices, diesel engine control has changed from traditional mechanical to electronic. At present, due to technical limitations in China, position control actuators are still the most widely used compared to time control and common rail actuators. For the position actuator, the integrated circuit control system outputs PWM control signals with different duty ratios, and converts the PWM control signals into different current values ​​through its external drive circuit, and drives the proportional electromagnet actuator. Proportional electromagnets generate different electromagnetic forces to make the racks in different positions, thereby controlling the operation of the diesel engine. [0003] At present, the actuators of diesel engines are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D1/12H02H3/08
CPCF02D1/12F02D2001/082H02H3/08
Inventor 李文辉袁志国王忠巍李学民霍天源刘友刘龙马修真
Owner HARBIN ENG UNIV
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