Fuel injection system for IC engines has valve member charged indirectly by pressure in control chamber connected to relief chamber

摘要

The system has an injection valve and a 3/2-way control valve (30) to control a connection to a relief chamber (72). The connection contains a control chamber (50), which is connection to the relief chamber controlled by the valve member (60) of the injection valve. The control chamber is defined by a movement control element. This moves synchronously with the valve member and is charged by the pressure in chamber, to press the valve member into closing position.