Ignition device of an i.c. engine

Details Ignition device of an i.c. engine Ignition device of an i.c. engine

1984-04-05

1986-02-18

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

123335, F02P 515

Patent

active

045705950

ABSTRACT:
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 counting 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. 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.

REFERENCES:
patent: 4075989 (1978-02-01), Nagasawa
patent: 4144859 (1979-03-01), Ohki et al.
patent: 4261312 (1981-04-01), Hart
patent: 4378769 (1983-04-01), Haubner et al.
patent: 4385601 (1983-05-01), Orova et al.
patent: 4385617 (1983-05-01), Nakata et al.

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