Driving circuit of diesel engine position control type actuator

Abstract

The object of the invention is to provide a driving circuit of a diesel engine position control type actuator. The driving circuit of the diesel engine position control type actuator includes a driving signal input circuit, an over-current protective circuit, a driving current feedback circuit, a pulse feedback circuit and an emergency stop signal input circuit. The driving circuit of the diesel engine position control type actuator has the advantages that (1) the output of a driving logic is realized by using a photoelectric coupler and MOSFET as main logic conversion elements, and the selection of element types is simple and easy to realize; (2) a system can adjust PWM control signals according to a feedback driving current and a driving pulse, thus the self-control of the system is realized; (3) the driving the circuit of the diesel engine position control type actuator has an over-current protection function, when a current is too large, the over-current protective circuit can turnoff a Q8 control switch at the lower end of the actuator to prevent the damage to the circuit caused by the excessive current; and (4) when the driving circuit fails, the actuator can be turned off independently in time through the emergency stop signal input circuit, and the driving the circuit of the diesel engine position control type actuator has a 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...

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

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