High-performance driving device used for fuel injector electromagnetic valve

Abstract

The invention discloses a high-performance driving device used for a fuel injector electromagnetic valve. The driving device is composed of a storage battery power source, a DC / DC booster circuit, a digital signal processor, a PWM driver, power switch tubes and a current detection module. The storage battery power source is connected with the DC / DC booster circuit, the digital signal processor is connected with the PWM driver and the current detection module, the PWM driver is connected with the DC / DC booster circuit and the power switch tubes, and the power switch tubes are connected with the storage battery power source, the DC / DC booster circuit, the current detection module and the fuel injector electromagnetic valve. A high-end double-voltage time-sharing power supply technology and a low-end current feedback PWM control technology are adopted, in this way, the opening and closing speed of the electromagnetic valve is remarkably increased, energy consumption is greatly reduced, and fuel injection precision is improved.

Description

technical field [0001] The invention relates to a driving device, in particular to a high-performance driving device for a fuel injector solenoid valve, and belongs to the technical field of electric appliances. Background technique [0002] Solenoid valve is a kind of industrial equipment controlled by electromagnetic. It is an automatic basic component used to control fluid. It belongs to actuator and is widely used in electronically controlled fuel injection system. The performance of the solenoid valve mainly depends on the driving circuit of the solenoid valve, especially in the electronically controlled fuel injection system, which can determine the fuel injection accuracy. The closing and opening time of the electromagnetic valve driving circuit of the existing injection system is relatively long, and the current peak value is large during the closing process, which cannot meet the requirements of complex injection. [0003] At present, most solenoid valve drive circ...

AI Technical Summary

Problems solved by technology

The closing and opening time of the solenoid valve driving circuit of the existing injection system is relatively long, and the current peak value is large during the closing process, which cannot meet the requirements of complex injection.

[0003] At present, most solenoid valve drive circuits are controlled by a single power supply voltage. In order to obtain a relatively fast opening speed, a relatively high voltage is usually provided. When the switching frequency is limited, there will often be a relatively large holding current value, so part of the current will be converted into heat, which greatly increases the energy consumption of the solenoid valve, and at the same time the closing response is relatively slow, which has a great impact on the life of the solenoid valve and control accuracy. big adverse effect

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