Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1984-08-16
1985-06-11
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
123198F, 123494, F02D 1700
Patent
active
045221790
ABSTRACT:
A multiple-displacement engine is provided with a cylinder number control means and a cylinder-reduction determination means in order to switch the operating state of the engine from the full-displacement operation to the part displacement operation or from the latter to the former according to the operating condition of the engine. A period calculating means receives signals generated from a crank angle detecting means every predetermined crank angle and calculates the time interval corresponding to the predetermined crank angle. An engine speed calculating means calculates the engine rpm on the basis of the calculated time interval or period. A crank angle determination means which receives the output from the cylinder-reduction determination means and sets the predetermined crank angle to be submitted to the period calculating means to include a crank angle corresponding to the power stroke of a working cylinder in the part-displacement state of the engine.
REFERENCES:
patent: 4040395 (1977-08-01), Demetrescu
patent: 4172434 (1979-10-01), Coles
patent: 4354471 (1982-10-01), Sugasawa
patent: 4469071 (1984-09-01), Bassi
Kaneko Tadashi
Nishimura Hirofumi
Oda Hiroyuki
Takai Akira
Takeuchi Nobuo
Cox Ronald B.
Mazda Motor Corporation
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