Outboard engine system

Details Outboard engine system Outboard engine system

B - Operations, Transporting

63

H

B63H 20/08 (2006.01) B63H 20/02 (2006.01) F02B 61/04 (2006.01) F02B 75/20 (2006.01) F16F 1/44 (2006.01) F16F 7/00 (2006.01) B63H 21/30 (2006.01) F02B 75/02 (2006.01) F02B 75/18 (2006.01)

Patent

CA 2384979

In an outboard engine system, an inertia force a generated longitudinally by a piston 14 is countervailed by an inertia force b generated by a crankshaft 15, and inertia forces c and d subsidiarily laterally generated vibrate a body of the outboard engine system laterally about a phantom center point C of vibration. At this time, an elastomeric member 74 resiliently supporting the system body on a hull has a rigidity in a tangent direction (in the direction of L3) about the phantom center point C of vibration, which is set to be lower than a rigidity in a radial direction (in the direction of L2) about the phantom center point C of vibration. Therefore, the lateral vibration is reduced effectively due to the lower rigidity of the elastomeric member 74. Thrusts e and f generated by a propeller and acting in a longitudinal direction (in the direction of L1) are transmitted to the hull through the elastomeric member 74. However, the rigidity of the elastomeric member 74 in the longitudinal direction is set to be higher and hence, the thrusts e and f can be transmitted effectively to the hull.

Selon l'invention, la force (a) d'inertie longitudinale produite par le piston (14) est annulée par la force (b) d'inertie produite par le vilebrequin (15), et les forces (c, d) d'inertie gauche et droite produites de façon secondaire font vibrer le corps principal du moteur hors-bord sur la gauche et sur la droite autour d'un centre de vibration (C) imaginaire. A ce stade, un corps élastique (74) servant de support élastique au corps principal du moteur hors-bord sur le bateau est défini de manière que la rigidité tangentielle (direction L3) autour du centre de vibration (C) imaginaire soit inférieure à la rigidité radiale (direction L2) autour dudit centre de vibration (C) imaginaire. Par conséquent, les vibrations gauche droite sont effectivement réduites du fait de la faible rigidité du corps élastique (74). La poussée (e,f) de l'hélice dans le sens longitudinal (direction L1) est transmise au bateau via le corps élastique (74). Etant donné que la rigidité du corps élastique (74) dans cette direction est calée sur une valeur élevée, la poussée (e, f) de l'hélice peut être transmise au bateau de façon efficace.

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