Yamaha Hatsudoki Kabushiki Kaisha

Sanshin Kogyo Kabushiki Kaisha

Tatsuyuki Masuda

Seiichi Nishimura

Michihisa Nakamura

Noritaka Matsuo

Hidenori Suhara

Kousei Maebashi

Minoru Suzuki

Toshikazu Ozawa

Masao Koriyama

Toshinori Fukudome

Eiichi Ito

Masanori Miyamoto

Minoru Iida

Shinji Sasamoto

A hybrid motorcycle capable of mounting thereon a hybrid-type drive unit, which does not project in a vehicle width direction and can be mounted even on a motorcycle having a limited vehicle width, includes a power distributing device positioned between a generator and a motor, and a reduction device arranged rearwardly of the power distributing device. A front end of a drive-wheel transmission device is journaled on a rear end of a central storage casing so that a rear end side of the drive-wheel transmission device is vertically swingable, and a rear wheel is journaled on the rear end of the drive-wheel transmission device. The power distributing device includes a sun gear, planetary gears, a planetary carrier, and a ring gear. Further, a carrier shaft projects from a rotor shaft and rotation of a crank shaft is transmitted through a intermediate gear portion to the projecting end of the carrier shaft.

Hybrid motorcycle

Several embodiments of the type two-cycle crankcase compression engines having exhaust control valves for controlling the effective compression ratio of the engine. The exhaust control valves are rotatably journaled in respective cylinder banks and are disposed at the same distance from a plane passing through the center of the valley between the cylinder banks as each other facilitating a common drive therefor. In one embodiment the exhaust control valves are disposed on the side of the cylinder banks adjacent the valley and in another embodiment they are disposed on the outside of the cylinder banks.

V-shaped plural cylinder two-cycle engine

A two cycle, crankcase compression, diesel engine having a high specific output. This is achieved by using an appropriately sized and located precombustion chamber into which the fuel is injected. The porting and direction of crankshaft rotation insure against compression and combustion leakage.

Diesel engine for vehicle

An oil-metering system for an internal combustion engine including an oil tank for supplying oil to the lubrication areas of the engine. The plurality of individual oil supply conduits are provided for supplying oil to lubrication areas. A pumping and control means individually meters oil supplied by the oil tank and supplies to the lubrication areas or returns oil to the oil tank. A single oil-return manifold connects the pumping and control means by a plurality of individual return conduits. The oil return manifold and pumping and control means are commonly mounted in close proximity to each other in order to reduce the length of the return conduits.

Lubrication system for two-cycle engine

Several embodiments of two-cycle internal combustion engines having exhaust control valves that include butterfly-type valves for minimizing the likelihood of sticking and reducing the area where deposits could form that would interfere with the valve operation. The butterfly-type valves are journaled in a separate valve housing that is mounted in a transversely extending bore that extends through the cylinder block of the engine for facilitating servicing.

Exhaust control valve for engine

A cylinder head arrangement for an engine such as a diesel engine that includes a precombustion chamber. The precombustion is formed primarily by a recess formed in the main combustion chamber and an insert piece that is interlocked in any of a variety of different matters to the cylinder head casting. Various arrangements for achieving the interlocked are disclosed and these include pressing and/or welding.

Precombustion chamber for diesel engine

An improved scavenging control system for a multi-cylinder, V-type, two-cycle crankcase compression internal combustion engine. In each embodiment, a scavenging manifold extends along one side of the crankcase chamber and communicates with the individual sealed sections therein through respective scavenging control passages. A plurality of butterfly-type throttle valves controls the communication between the crankcase chamber and the scavenging manifold and these valves are all affixed on a common valve shaft. In one embodiment, the scavenge control system is disposed in the valley between the cylinder banks and in the other illustrated embodiment, the scavenging system is disposed on one side of the crankcase and outside of the valley between the cylinder banks.

V-type, multi-cylinder, two-cycle engine

An improved lubrication system for a two-stroke engine having a lubrication path from an oil sump directly to an induction valve assembly for noise reduction. The oil sump is divided into two chambers with a restricted passage therebetween to ensure lubrication of transmission gears upon startup while reducing drag during operation. A cross-drilled lubrication passage through each crankshaft throw terminates in a second passage proximate a dead-end plug, the second passage being in communication with the piston rod bearing. Each piston skirt includes at least one axial groove in registration with an oil supply passage. Circumferential grooves distribute the oil around the piston skirt from the axial grooves. The pistons may include ceramic top layers for heat insulation to increase the compression ratio possible by raising the ring positions. The engine incorporates an air/oil mixture separator within a balancer shaft chamber and air from the chamber is directed to the intake system.

Lubricating system for engine

An exhaust control valve arrangement for a two cycle internal combustion engine for altering the compression ratio to provide optimum running under all conditions. An arrangement is provided or cleaning the exhaust control valve and its surrounding cooperating surfaces of the engine upon shutting off of the engine to preclude the formations of deposits that can cause sticking of the valve element. The valve element is rotated through a number of cycles after the engine is stopped through a wider range than during its normal valving operation for removing deposits. The number of cycles is chosen in response to an engine condition such as length of time of running or amount of lubricant supplied to the engine. Various valve arrangements are disclosed that improve the cleaning operation and permit cleaning even while the engine is running.

An exhaust control drive arrangement for an internal combustion engine for varying the exhaust port timing and effective compression ratio. The exhaust control valve is driven by a servomechanism mounted directly on the cylinder block at one end of the engine and adjacent the flywheel so as to provide a compact assembly.

Internal combustion engine with exhaust control device

An exhaust control system for a two-cycle engine for controlling the effective compression ratio. The exhaust control valve is operated by a servo mechanism to maintain the appropriate compression ratio in response to engine running conditions. To facilitate servicing, the exhaust control valve is rotatably journalled within the engine cylinder block in a removable sleeve. In addition, a manual operator is provided for manually rotating the exhaust control valve for cleaning operation and to reduce sticking if corrosion occurs.

Variable compression ratio system for two-cycle engine

An exhaust control valve arrangement for a two cycle internal combustion engine for altering the compression ratio to provide optimum running under all conditions. An arrangement is provided for cleaning the exhaust control valve and its surrounding cooperating surfaces of the engine upon shutting off of the engine to preclude the formations of deposits that can cause sticking of the valve element. The valve element is rotated through a number of cycles after the engine is stopped through a wider range than during its normal valving operation for removing deposits. The number of cycles is chosen in response to an engine condition such as length of time of running or amount of lubricant supplied to the engine. Various valve arrangements are disclosed that improve the cleaning operation and permit cleaning even while the engine is running.

Several embodiments of two cycle crankcase compression internal combustion engines that include an arrangement for cooling and lubricating the small end of the connecting rod, the piston pin and the head of the piston. These systems include an opening that is formed in the side or skirt of the piston and which is aligned with a corresponding opening in the cylinder during at least a portion of the stroke of the piston for delivering air and/or lubricant to the interior of the piston.

Growing community of inventors

Iwata, Japan

Tatsuyuki Masuda