Honda Giken Kogyo Kabushiki Kaisha

Honda Giken Kabushiki Kaisha

Takashi Inagaki

Kouji Okazaki

Tsugio Ikeda

Toshio Shimada

Michio Okubo

Yoshiaki Hori

Shoichi Honda

Shizuo Yagi

Takashi Shichinohe

Goroei Wakatsuki

Shinichi Nakano

Shigeo Kimura

Masahiro Imaizumi

Norimasa Takasaki

Yasumasa Fujita

Masayoshi Ohashi

Youichi Ishibashi

Ryuichi Hanaoka

Shinichiro Izawa

Motoi Nagataki

Takafumi Irie

Hiroshi Akai

Michio Ookubo

In a power transmission path of a vehicle for traveling on uneven ground, a torque converter is provided so that torque transmission to a propeller shaft varies smoothly. Accordingly, it is difficult for the torque transmitted to the propeller shaft to exceed a tire slip limit. This arrangement suppresses slippage during traveling on uneven ground such as a muddy, marshy, sandy, snowy, or gravel road surfaces.

Vehicle for traveling on uneven ground

A molten metal is poured into and stored in a hopper in a rotary-mold gravity casting process, so that a small amount of the molten metal is allowed to flow out of the hopper into a runner to previously fill up the runner. A casting mold is rotated from this state, thereby causing the molten metal to be filled from the hopper into a cavity by a difference in height generated between the molten metal level in the hopper and the molten metal level in the casting mold. Thus, when the molten metal, once stored in the hopper, is filled into the cavity in the casting mold by rotating the casting mold, the inclusion of air can be prevented from being produced due to ruffling of the molten metal in the cavity.

Rotary-mold gravity casting process

The inlet and outlet passages communicating with a water-cooled engine oil cooler for a vehicle, such as a motorcycle, are arranged for bypass of a regulated amount of oil from the inlet passage to the outlet passage to enhance the flowability of the cooled oil. Provision is made for a replaceable flow control orifice between the oil inlet and outlet passages to regulate oil viscosity. Also described is an arrangement providing for mounting the cooler to the crankcase or oil pan surface whereby air flowing past the cooler during movement of the vehicle assists the effects of the cooling liquid.

Engine oil cooling system

A valve drive system including mechanisms for varying the timing and lift of intake and exhaust valves in internal combustion engines. In one embodiment, an intake camshaft support member and an exhaust camshaft support member are separately mounted to pivot about axes relative to intake and exhaust rocker arms. The support members include concentric mountings along which the support members together with the cams mounted therein move to selectively advance and retard the valve timing and vary the valve lift. In other embodiments, the camshaft support is unitary in construction for both the intake and exhaust valve train. A variety of adjustments are possible with the several configurations including intake valve closure before bottom dead center during partial load operation.

Valve driving mechanism for internal combustion engines

A vehicle engine, particularly adapted for motorcycle application, includes a housing structure in which the cylinder block, the crankcase and the transmission case are integrally formed and openings are provided in separate, angularly displaced walls of the housing for accessing the crankcase and transmission case respectively to permit the crankshaft and the transmission to be independently installed or demounted with respect to each other. Also, the detachable cover for closing one of the side openings of the housing is formed as a stopper for preventing axial disengagement of the starter apparatus ring gear from the crankcase.

Vehicle engine

In order to reduce the space requirements of an internal combustion engine the starter apparatus therefor includes an axially elongated intermediate gear shaft containing gears at each end, one of which meshes with the starter motor pinion and the other of which meshes with the ring gear on the crankshaft.

Starting apparatus for an internal combustion engine

In order to prevent inordinate thermally-induced backlash between the drive and driven gears of the timing transmission of an internal combustion engine, an idler gear between the drive and driven gears is rotatably carried by a support plate having one end connected to one of the engine crankshaft or camshaft and its other end connected to the engine body by a connection adapted to accommodate relative thermal expansion between the support plate and the engine body.

Timing transmission device for an internal combustion engine

An oil pump organization for an internal combustion engine is described in which the pump rotor is operatively connected to a transmission gear shaft in order to eliminate the need for a pump drive shaft and to thereby reduce engine space requirements.

Oil pump for internal combustion engine disposed concentrically about

A cam shaft driving device for an engine which is adapted to operably associate a cam gear located on a cam shaft of an upper portion of an engine body with a driving gear on a crank shaft of a lower portion of the engine body, with this association being effected through the intermediary of a cam idling gear. In this device, first and second wall portions, mutually displaced along the axis of crank shaft rotation of the engine and projecting outwardly and laterally from both sides of the engine body, provide a receiving space. This receiving space is provided between adjacent cylinders in the engine body and is larger in laterally extending width than a diameter of the cylinders, with this width extending laterally of the cylinders and transversely of the axis of rotation of the crank shaft. A single gear holder is located in said receiving space, with this gear holder being mounted on at least one of the wall portions. The cam idling gear is rotatably supported and received on a side surface of the single gear holder. A shock absorbing, swingable boss/bearing arrangement may be provided for supporting the idling gear so as to control back lash phenomena.

Drive mechanisms

An engine employing multiple valves which are mutually inclined. A valve actuating assembly includes two camshafts. Primary rocker arms are driven by the camshafts and in turn drive secondary rocker arms. The secondary rocker arms are pivotally mounted about common shafts and extend to the valves. The common shafts are located between the valves.

Valve structure for an internal combustion engine

A multi-cylinder internal combustion engine comprising: first and second crankshafts disposed apart from and parallel with each other; first and second pistons operatively connected to the first and second crankshafts through connecting rods, respectively; and first and second cylinders for slidably accommodating therein the first and second pistons, respectively, both the crankshafts being interlocked with each other to rotate synchronously, the first and second cylinders being disposed adjacent to each other in the axial directions of the crankshafts. Vibrations due to the primary inertial force can be eliminated or alleviated without using a special balancer shaft. The size and weight of the engine are greatly reduced as compared with a conventional horizontally opposed type or V type engine.

Multi-cylinder internal combustion engine

A three- or four-wheeled motor vehicle such as a buggy includes a rear fork composed of first and second rear fork members having front ends pivotally mounted on a frame and rear ends supporting rear wheels, respectively, an axle housing having first and second axial ends, the first axial end being joined to the rear end of the first rear fork member, a rear axle rotatably supported in the axle housing, a gear case coupled between the rear end of the second rear fork member and the second axial end of the axle housing and accommodating a gear mechanism for driving the rear axle, and at least one cross member extending between and joined to the first and second rear fork members. The rear end of the first rear fork member has a first joining surface having at least one attachment hole defined therein and directed transversely of the frame. The first end of the axle housing has a second joining surface having at least one attachment hole defined therein and facing the first joining surface. At least one of the attachment holes in the first and second joining surfaces is elongate. The first rear fork member and the axle housing are joined by fasteners through the attachment holes.

Shaft-driven motor vehicle

A motorcycle having an engine inclined to the symmetrical center plane of the motorcycle frame. A drive shaft employed with the engine is inclined relative to the center plane of the motorcycle frame so as to diverge outwardly from the center plane as it extends rearwardly from the engine.

Motorcycle

A valve driving apparatus in an internal combustion engine having plural valve stems in a cylinder head on an upper portion of a main body of an engine which are aligned radially about the cylinder head with the intersection of their longitudinally axes substantially coinciding with a center of curvature of an upper wall surface of a combustion chamber, the valve stems being arranged to be driven by at least one cam shaft through respective subsidiary rocker arms which are in abutment with respective heads of the valve stems and respective rocker arms which are in abutment with the subsidiary rocker arms, characterized in that a shaft for each of the subsidiary rocker arms is positioned on a plane crossing a longitudinal axis of the corresponding one of the valve stems at a right angle and existing in a range of up and down stroke of the head of the valve stem.

Growing community of inventors

Saitama, Japan

Takashi Inagaki