Ka d  va ka (5) m  na sv  bo n  va kov  ploÜe, ° dic  velikosti zdvihu p stu (1)  erpadla, vytvo°enu vzestupnou prvn  d l   oblast (V), pro proveden  p°edvst°iku   ste n²m zdvihem p stu (1)  erpadla, na kterou navazuje druh  d l   oblast  (P), pro setrv n  p stu (1)  erpadla po skon en  p°edvst°iku bu  v dosa en  poloze, nebo pro zajiÜt n  jeho dalÜ ho nepatrn ho zdvihu  i poklesu, na kterou navazuje vzestupn  t°et  d l   oblast (H), pro proveden  hlavn ho vst°iku dalÜ m zdvihem p stu (1)  erpadla, kter  je sestupnou oblast  propojena se vzestupnou prvn  d l   oblast  (V). Elektricky ovl dan² ventil (24) je p°i n zk m po tu ot  ek spalovac ho motoru ° zen prost°ednictv m ovl dac ho ·stroj  (25) tak, aby byl p°ed a v pr b hu p°edvst°iku uzav°en, po ukon en  p°edvst°iku a p°ed za  tkem zah jen  hlavn ho vst°iku otev°en, na za  tku hlavn ho vst°iku a v p°ev  n  dob  jeho pr b hu op t uzav°en a znovu otev°en p°ed t m, ne  p st (1)  erpadla dos hne sv ho maxim ln ho zdvihu. P°i vysok m po tu ot  ek spalovac ho motoru je elektricky ovl dan² ventil (24) ° zen tak, aby byl uzav°en ji  p°ed za  tkem hlavn ho vst°iku, bez p°edch zej c ho p°edvst°iku, a znovu otev°en p°ed t m, ne  p st (1)  erpadla dos hne sv ho maxim ln ho zdvihu.\
Output: In the present invention there is disclosed a fuel injection system comprising a fuel injection pump, a pump piston (1), said pump piston is driven by a cam drive provided with at least one cam and defines a pump work chamber (10) which is used to supply at least one fuel injection valve (13) with fuel injection quantities brought to injection pressure, an electrically controlled valve (24) for connecting the pump work chamber (10) of the fuel injection pump to or closed off from a discharge chamber (17) in order to control the injection, and with interruption of the injection between one pre-injection and one main injection per injection event, the at least one cam (5) is embodied so that on a cam edge side that moves the pump piston to a feed stroke, said at least one cam has a first partial region (V) in which the pump piston executes a feed stroke to carry out a pre-injection, said at least one cam has a second partial region (P) in which after an ending of the pre-injection, the piston (1) essentially remains in a position the piston reaches at the ending of the pre-injection stroke and then, in order to execute the feed stroke for the main injection, said at least one cam has a third partial region (H), wherein the electrically controlled valve (24) is triggered so that at a low speed, the control valve is closed before the beginning of the first partial region (V) and in the first partial region (V), the valve is opened to end the pre-injection, and then, in order to execute the main injection, at a beginning of a third partial region, the valve is closed again and in this third partial region of the cam, the valve is opened again before the top dead center of the cam is reached, and that at a high speed, in order to initiate the main injection without a preceding pre-injection, the valve is closed within the second partial region (P) and is opened again within the third partial region in order to end the main injection before the top dead center is reached.