DAF CF 65/75/85 SERIES устройство форсунки и ограничитель давления топлива
INJECTOR The injectors can be opened and closed electrically. The injector is normally closed. The load of the spring (2) and the fuel rail pressure that controls chamber C ensure this. The fuel is supplied from the fuel rail via A. The return fuel can flow back to the fuel tank via B. When the coil (7) is energised, the armature housing (5) moves up. As a result the pressure in chamber C drops slightly and the injector needle (1) is forced up to chamber D by the rail pressure. The fuel can then be injected.
DAF CF 65/75/85 SERIES ТОПЛИВНЫЙ КЛАПАН ОГРАНИЧЕНИЯ ДАВЛЕНИЯ FUEL RAIL PRESSURE-LIMITING VALVE
The fuel rail has a pressure-limiting valve so that the rail pressure is maintained at a safe value in emergency situations. The fuel rail pressure control circuit is normally active. This consists of the fuel lift pump, fuel pump control solenoid valve, high-pressure pump, fuel rail, rail pressure sensor and electronic unit. If a fault occurs, the rail pressure can no longer be controlled. This can rise to the actuating pressure of the fuel rail pressurelimiting valve. This pressure is approx. 1650 bar. In the open position all surplus fuel flows without pressure to the fuel tank return connection. The valve includes a sealing cone (1), a valve body (2), a spring (3) and a return connection with quick-release coupling (4). DAF CF 65/75/85 SERIES чертеж и описание топливного насоса DAF CF 65/75/85 series ТОПЛИВНАЯ СИСТЕМА ECS-DC3 остальной материал для ремонта DAF |