| 摘要 |
The invention relates to a method for operating an internal combustion engine (10) having a piston pump as the high-pressure pump (18). Said piston pump is driven by a drive shaft (28) of the internal combustion engine (10), and fuel is delivered by the high-pressure pump (18) from a low-pressure area (16) to a high-pressure area (38) and the quantity of the fuel delivered by the high-pressure pump (18) is adjusted by a quantity control valve (44). The aim of the invention is to reduce acoustic emissions of the high-pressure pump. For this purpose, the high-pressure pump (18) is operated in an on-off mode alternately at full delivery for individual or subsequent piston strokes and at idle delivery for individual or subsequent piston strokes. Full delivery mode is activated when a lower pressure limit is fallen short of, until an upper pressure limit is reached.
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