Intake silencer of the variable type for use in motor vehicle

Details Intake silencer of the variable type for use in motor vehicle Intake silencer of the variable type for use in motor vehicle

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 35/12 (2006.01) B60K 13/02 (2006.01)

Patent

CA 2053658

A motor vehicle intake silencer having a variable length resonance chamber, said length being rapidly changeable in response to engine speed by varying the effective length of said resonance chamber. The present invention for reducing noise comprises a signal processing part, a signal comparing part and a valve driving part. In the signal processing part, a RPM sensor modulates a waveform obtained by detecting the revolution number of the engine and a F/V converter changes it thereafter emitting a signal to the signal comparing part. In the signal comparing part, a plurality of comparators emit the opened and closed signal to a valve driver by comparing a output signal emitted from the signal processing part with a basic signal. In the valve driving part, when the corresponding valve driver turns on or off by virtue of the signal emitted from the corresponding comparator, a corresponding actuator opens or closes the corresponding valve dividing the inside of the side branch. Thus, it can rapidly change its capacity according to the change of the revolution number of the engine and also has the simple structure and the small size.

Silencieux d'admission de moteur de véhicule automobile ayant une chambre de résonance de longueur efficace variable, ladite longueur étant rapidement variable en réponse à la variation de la vitesse du moteur. Cette invention, qui sert à réduire le bruit, comprend un bloc de traitement des signaux, un bloc de comparaison de signaux et un bloc de commande de clapet. Dans le bloc de traitement des signaux, un capteur tachymétrique module le signal produit par la vitesse de rotation du moteur, et un convertisseur F/V converti ce signal l'envoie au bloc de comparaison. Ici, plusieurs comparateurs comparent le signal de sortie du bloc de traitement des signaux avec un signal de base et transmettent le signal d'ouverture ou de fermeture à un circuit d'attaque de clapet. Dans le bloc de commande de clapet, lorsque le circuit d'attaque de clapet correspondant est excité ou désexcité selon le signal reçu du comparateur correspondant, un actionneur connexe ouvre ou ferme le clapet connexe, ce qui fait varier les dimensions efficaces de la branche latérale de la chambre. Par conséquent, la chambre peut changer rapidement de dimensions selon la variation de la vitesse de rotation du moteur. De plus, l'ensemble est de structure simple et de taille réduite.

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