Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1995-01-31
1997-04-01
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
123468, F02M 700
Patent
active
056156561
ABSTRACT:
A fuel-injection system for an internal combustion engine and in particular, for a diesel motor has at least one injection element for each combustion cylinder controlled from a control device, which injection element has an injection opening extending into the cylinder and closable by same, and a pressure chamber arranged in front of said injection opening, which pressure chamber is connected to a high-pressure part supplied by a fuel pump in dependency on the motor speed, load and load change. The injection amount of the fuel into the combustion cylinder can be supplied by means of a metering device preferably connected in front of the fuel pump and operable by the control device. The metering device has a 2/2-way valve connected in front of the fuel pump designed as a radial piston pump, which 2/2-way valve opens or rather closes during suction in order to achieve the desired fuel injection amount in dependency on the position of the pump piston of the fuel pump. With this arrangement it is in particular prevented together with the monitoring of the pressure in the high-pressure part on the one hand that one or several combustion cylinders do not operate over a longer period of time in an insufficient operating condition and on the other hand that greater motor damages through defects in particular in the injection elements also can be avoided. With this the fuel consumption and also the noise and polluting emissions can be kept to an absolute minimum.
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