Control system for varying the amount of scavenging air to be ad

Details Control system for varying the amount of scavenging air to be ad Control system for varying the amount of scavenging air to be ad

1978-01-06

1980-03-11

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Rear compression

123 26, 123119D, F02D 3902, F02M 700

Patent

active

041922620

ABSTRACT:
A control system is adapted for an internal combustion engine in which a jet of air is injected into each combustion chamber via a second intake valve during each exhaust cycle and the subsequent intake cycle. The system comprises a source of compressed air having a pressure to be varied in accordance with the engine speed, an injection passageway leading from the source toward each second intake valve and a flow controller operated in accordance with changes in intake manifold vacuum. The flow controller includes a scheduled flow area therethrough to increase, under conditions in which the engine speed is constant, the amount of air passing through the injection passageway in accordance with increasing engine load in such a way as to increase the ratio of air flow through the injection passageway to the intake air flow to the engine under light engine load in order to cope with increasing residual gas fraction within each combustion chamber when the engine idles or operates under deceleration of the vehicle.

REFERENCES:
patent: 2818931 (1958-01-01), Mallory
patent: 3739797 (1973-06-01), Caldwell
patent: 3908618 (1975-09-01), Tange et al.
patent: 3976039 (1976-08-01), Henault
patent: 4060061 (1977-11-01), Might
patent: 4083338 (1978-04-01), Bertling et al.
patent: 4088101 (1978-05-01), Wakita

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