Device for adjusting the fuel-injection quantity in dependence on an operating variable in fuel-injection internal-combustion engines

摘要

Device for adjusting the fuel-injection quantity in dependence on an operating variable in fuel-injection internal-combustion engines. A device for adjusting the fuel-injection quantity in dependence on an operating variable of fuel-injection internal-combustion engines comprises an injection device and a control or regulating member on which the operating variable acts. For the control or regulating member, a possibility of action on the injection device is shown, with the result that an adjustment of the fuel-injection quantity better adapted to the operating conditions is achieved. A flow valve in the low-pressure fuel-feed system of the injection device is so connected operatively to the control or regulating member that the fuel is placed at a pressure varied in relation to a predetermined system pressure in front of a high-pressure space of the injection device. By changing the system pressure, a varied injection quantity or an injection quantity adapted to the requirement of the internal-combustion engine is achieved.