The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 1997
Filed:
Oct. 19, 1995
Jean-Louis Laveran, Asnieres, FR;
Valeo Thermique Moteur, Le Mesnil-Saint-Denis, FR;
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.