Of capacitor energy storage type solenoid valve driver circuit

Capacitive energy-storage type solenoid valve driver circuit development and manufacture of mechanical valve experts of high pressure common rail fuel injection system is one of the development direction of diesel engine. The system by controlling the fuel common rail pressure and fuel injector for quick opening and closing to ensure that the engine fuel injection quantity and injection timing, accurately meet the requirements of the ideal fuel injection rate. Key to perform device is high speed solenoid valve, and its current response characteristics determine its drive circuit shall meet the following basic requirements. 。 Electromagnetic valve open top energy excitation power driver module should be injected energy to the electromagnetic valve at a rate as high as possible, to ensure that the electromagnetic valves produced in the process of opening large enough electromagnetic force, shorten the response time. 。 Electromagnetic valve opening, because of work air gap is smaller, the magnetic circuit magnetic resistance is very low, keep going into the small electromagnetic coil current can generate enough electromagnetic force to ensure the reliable of the electromagnetic valve to open. Small keep current can reduce energy consumption, reduce the heating coil, is advantageous to the fast electromagnetic valve closed at the same time. Above all, the electromagnetic valve drive circuit design requirements in the different working stages of solenoid valve should keep the corresponding ideal drive current. The first page of the first page, pp