Method of control of internal combustion engine variable swirl a

Details Method of control of internal combustion engine variable swirl a Method of control of internal combustion engine variable swirl a

1984-09-10

1985-05-28

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123188M, 123308, 123432, 123179L, 123179A, F01L 306, F02B 3100, F02N 1700

Patent

active

045193550

ABSTRACT:
A downstream end of an intake port of an internal combustion engine opens to a combustion chamber as a parallel combination of a helical passage which extends helically around and towards its downstream end and a straight passage which extends substantially straight towards its downstream end, with an intake passage valve system being incorporated so as to selectively alter the proportions of intake flow through the straight passage and the helical passage; and a fuel injection valve injects fuel to the intake port. From immediately after starting of the engine for a certain time period the amount of fuel injected through the fuel injection nozzle is increased by a ratio dependent on the temperature of the engine. When this fuel injection amount increase ratio is greater than or equal to a certain value the intake passage switchover control valve system is controlled so as to maximize the proportion of intake flow that passes through the straight passage irrespective of the operational conditions of the engine, while on the other hand when this fuel injection amount increase ratio is less than this certain value the intake passage switchover control valve system is controlled so as to alter the proportions of intake flow that pass through the straight passage and the helical passage, according to the operational conditions of the engine.

REFERENCES:
patent: 3680532 (1972-08-01), Omori
patent: 3683871 (1972-08-01), Barr et al.
patent: 4411226 (1983-10-01), Okumura et al.
patent: 4438741 (1984-03-01), Okumura et al.

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