摘要:
Appareil lève-soupape pour un moteur à combustion interne, qui utilise un montage balladeur (6) que fait osciller une came coudée (13). La soupape (7) est montée de manière résiliente dans le montage balladeur (6). Des cames à pans échelonnées ou hélicoïdales de réglage (21) et (24) permettent des modifications dans le réglage de la distribution et la levée des soupapes. Ces modifications peuvent être effectuées pendant que le moteur fonctionne afin de passer d'un moteur à faible vitesse à un moteur à vitesse élevée.
摘要:
To obtain a valve opening and closing timing control apparatus where a flow passage of working fluid may be easily defined and which improves control responsiveness of a relative rotational phase. The valve opening and closing timing control apparatus includes a driving-side rotation member, a driven-side rotation member, a tubular member provided at an inner portion of the driven-side rotation member, a bolt in a tubular form provided at an inner side of the tubular member to connect the driven-side rotation member and a camshaft to each other, an introduction passage provided at least at one of the bolt and the tubular member between the bolt and the tubular member and bringing a working fluid to flow in the rotation axis direction, an introduction communication passage provided at the bolt to bring the working fluid at the introduction passage to flow to an inner side of the bolt, an advanced angle communication passage and a retarded angle communication passage provided at different positions from each other in a longitudinal direction of the rotation axis, and a control valve body provided at the inner side of the bolt to reciprocate in the rotation axis direction and supplying the working fluid to the advanced angle communication passage or the retarded angle communication passage.
摘要:
An overhead-camshaft internal combustion engine is disclosed, in which the fuel pumps are arranged to use efficiently the space within a cylinder head assembly (100) of the engine. The cylinder head assembly (100) includes a cylinder head block (102), and the engine comprises a camshaft (106) mounted longitudinally with respect to the cylinder head assembly (100), the camshaft (106) being rotatable about a camshaft axis (A) and having a plurality of inlet and exhaust cams for actuating associated inlet and exhaust valves (116a; 116b) of the engine, and at least one fuel pump comprising a unit pump assembly (110) driven directly by a respective pump cam (130) provided on the camshaft (106), the unit pump assembly (110) being elongate to define a pump axis (P). The engine further comprises a plurality of rocker arms (118) driven by the inlet and exhaust cams and arranged to actuate the inlet and exhaust valves (116a, 116b). Each rocker arm (118) is pivotable about a rocker arm axis (R) which is substantially parallel to the camshaft axis (A). The or each pump assembly (110) is mounted between the rocker arm axis (A) and the cylinder head block (102).
摘要:
It is configured such that plasma generated at a time of ignition should diffuse over an entire combustion chamber in a spark ignition type internal combustion engine in order to improve fuel efficiency. An ignition device for a spark ignition type internal combustion engine is provided including an ignition plug and a transmission antenna provided in the vicinity of the ignition plug and adapted to transmit an electromagnetic wave to a combustion chamber. The ignition device allows a spark discharge generated between a central electrode and a ground electrode of the ignition plug to react with an electric field created via the transmission antenna in the combustion chamber so as to generate plasma and ignite fuel air mixture. A receiving antenna is arranged on a combustion chamber -facing surface of at least one of an intake valve and an exhaust valve, and is adapted to receive the electromagnetic wave transmitted from the transmission antenna.
摘要:
A variable valve device of the invention has a structure in which, as connecting means for connecting a movable cam 22 located in an outer periphery of an outer camshaft 17a and an inner camshaft 17b located inside the outer camshaft 17a, there are provided a pin-like member 24 that is movably inserted so as to penetrate the movable cam 22, the outer camshaft 17a and the inner camshaft 17b along a diametrical direction of a shaft member 17 that is formed by turnably encasing the inner camshaft 17b in the outer camshaft 17a, and an escape-preventing portion 50 disposed in the end portion of the pin-like member 24. The movable cam 22 and the inner camshaft 17b are thus connected together while preventing large press-fit load and axial force from acting on components.
摘要:
The invention relates to a valve train device, in particular an internal combustion engine valve train device, having a first camshaft unit, which comprises an external shaft (10a; 10b) and primary cams (11a, 12a, 13a, 14a; 11b, 12b, 13b, 14b, 11b, 12b, 13b, 14b) connected to the external shaft (10a; 10b), having a second camshaft unit, which comprises an inner shaft (15a; 15b) guided in the external shaft (10a; 10b) and secondary cams (16a, 17a, 18a, 19a; 16b, 17b, 18b, 19b, 16b, 17b, 18b, 19b) connected to the inner shaft (15a; 15b), and having an adjustment unit (22a; 22b), which is provided for adjusting the two camshaft units against one another. It is proposed that the adjustment unit (22a; 22b) is used for providing an at least two-stage sequential valve lift switching.