| 摘要 |
PCT No. PCT/DE98/00452 Sec. 371 Date Dec. 17, 1998 Sec. 102(e) Date Dec. 17, 1998 PCT Filed Feb. 17, 1998 PCT Pub. No. WO98/49442 PCT Pub. Date Nov. 5, 1998A fuel injection system with a fuel injection pump whose high-pressure delivery is determined by an electrically controlled valve that controls a discharge conduit. The phase of the high-pressure delivery is determined by the closing of the control valve. In order to carry out an injection that is divided into a pre-injection and a main injection, and in order to simplify the triggering of the electrically controlled valve, the cam driving the pump piston is formed so that the cam presents a region (P) in which the injection between a pre-injection and a main injection is interrupted. The pump piston remains in the position it has reached for pre-injection, moves backward, or continues to move slowly. The valve is controlled so that at a low speed, the pump work chamber is closed when the pump piston is disposed before the beginning of the cam region (V) preceding the region (P) and is open when the pump piston is still disposed in the cam region (V) and is closed again at the beginning of the cam region (H) that follows the region (P). The valve is subsequently opened again in order to end the injection, while at a high speed, the first closing of the valve per feed stroke occurs in the region (P), without a preceding pre-injection.
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