Internal-combustion engines – Charge forming device – Supercharger
Patent
1995-10-19
1997-07-22
Koczo, Michael
Internal-combustion engines
Charge forming device
Supercharger
251 94, F02B 2904
Patent
active
056495161
ABSTRACT:
A pivoting flap valve, controlled by a pneumatic main actuator or actuating jack through an engagement means or connecting piece and a lever coupled to the valve, controls the changeover between a state in which supercharging air is delivered to the engine through a cooling radiator and a state in which it is delivered directly, according to the temperature of the air. The control device includes, besides the main actuator, two auxiliary or safety actuators or release jacks, carrying thrust pieces which cooperate with the connecting piece, or stop block, so as to prevent the ram of the main actuator from being extended. The flap valve is therefore unable to be put in a position such that the supercharging air bypasses the cooling radiator. The two auxiliary actuators work in such a way as to hold the ram of the main actuator in its retracted position, firstly in the event of failure of the supply pressure in the working fluid for the actuators, and secondly when the supercharging air pressure exceeds a predetermined threshold value.
REFERENCES:
patent: 3712282 (1973-01-01), Isley
patent: 4513729 (1985-04-01), Udd
Koczo Michael
Valeo Thermique Moteur
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