F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.35
F02P 11/02 (2006.01) F02P 5/15 (2006.01)
Patent
CA 1238079
ABSTRACT OF THE DISCLOSURE A microcomputer is used in the invention for the control of the ignition function of an ignition system of an i.c. engine. The limitation of r.p.m. of the engine at high r.p.m. is brought about by an acurately developed procedure of delayed ignition in two steps. The control of ignition timing is carried out by means of timer pulses between reference points, whereby the number of pulses between such points constitutes an address of a position in the ROM of the computer, where a reference number of the ignition time is stored. A delayed ignition can be programmed in the memory so that the ignition characteristic gets the shape shown in the Figure. In manufacturing of a great assortment of engines several demands for limitation of maximum r.p.m. can be fulfilled in that the microcomputer has a spacing for storing several characteristics. The selection of a particular characteristic for a sort of engine is made by establishing permanent connections (or disconnections) in separate inputs of the computer which reads the combination and choses the corresponding characteristic.
452006
Aktiebolaget Electrolux
Mccarthy Tetrault Llp
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