F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/06 (2006.01) F01L 13/06 (2006.01) F02D 13/06 (2006.01) F02D 41/36 (2006.01) F02D 13/02 (2006.01)
Patent
CA 2458407
A method of boot strap starting a diesel having a plurality of cylinders (32) comprises the steps of initiating cranking the diesel and responsive to cranking forcing exhaust valves (34) for all cylinders (32) open during compression strokes. Thereafter, responsive to the engine rotational speed signal exceeding a first threshold, an exhaust valve (34) for one cylinder (32) is allowed to open and close in synchronous with movement of a piston (74) in the cylinder (32). Further responsive to engine rotational speed exceeding a second threshold higher than the first threshold, cranking is discontinued and the remaining exhaust valves (34) are allowed to open and close in synchronous with movements of pistons (74) in their respective cylinders (32).
L'invention concerne un procédé d'amorçage d'un moteur diesel comprenant une pluralité de cylindres (32). Les étapes de ce procédé consistent à faire démarrer le moteur diesel, et en réponse au démarrage, à forcer l'ouverture des soupapes (34) d'échappement dans tous les cylindres (32) pendant les courses de compression. Ensuite, lorsque le signal de vitesse de rotation du moteur dépasse un premier seuil, la soupape (34) d'échappement d'un seul cylindre (32) s'ouvre et se ferme en synchronisation avec le mouvement du piston (74) dans le cylindre (32). Lorsque la vitesse de rotation du moteur dépasse un second seuil plus élevé que le premier seuil, le démarrage est interrompu et les soupapes (34) d'échappement restantes s'ouvrent et se ferment en synchronisation avec le mouvement des pistons (74) dans les cylindres respectifs.
Marshall Brian P.
Rodgers David V.
Finlayson & Singlehurst
International Truck Intellectual Property Company Llc
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