| 摘要 |
PCT No. PCT/SE93/00594 Sec. 371 Date Jan. 4, 1995 Sec. 102(e) Date Jan. 4, 1995 PCT Filed Jun. 30, 1993 PCT Pub. No. WO94/01668 PCT Pub. Date Jan. 20, 1994.A device and method which can be applied primarily to computer controlled fuel systems for Otto engines, with sequential injection of fuel in each cylinder to the inlet valves. In order to obtain the fastest possible response with the smallest possible number of calculations of the fuel flow, the invention is characterized that it is the initiation of the opening or closing of the injection valve which immediately gives rise to a calculation of the instantaneous fuel demand. When the injector is activated for opening or closing, an interrupt is generated which, in the case of automatic opening, activates one complete calculation of the instantaneous fuel demand on the basis of the parameters which are detected at the time of opening or, at the time of closing, on the basis of a limited number of parameters which are indicative of the load enrichment requirement at the time of closing. The calculation for closing can be completed by the microprocessor with a limited number of instructions before the injector has begun to close. Thus a counter-command for opening the injector, caused by the fuel enrichment requirement, results in a single coherent, but extended injection. |
