Mazda Motor Corporation

Yamaha Hatsudoki Kabushiki Kaisha

Hatamura Engine Research Office Ltd.

Honda Motor Co., Ltd.

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Hiroshima University

Yamaha Motor Company Ltd

Ogino Kogyo Co., Ltd.

Cd-adapco Japan Co., Ltd.

Hatamura, Koichi

Fujita, Hideo

Koichi Hatamura

Hideo Fujita

Tetsuo Hiraoka

Koji Asanomi

Tsuyoshi Goto

Eiji Nishimura

Yoshiyuki Miyagi

Kazuaki Hokazono

Yasuhiro Kawasako

Atsushi Morita

Hiroyuki Takebayashi

Takahisa Ishihara

Hidetsugu Matsubara

Toru Nakano

Taizo Fujimura

Yasuo Tanaka

Seishiro Takayama

Sigeyasu Yamamoto

Takenori Otsuka

Muneyuki Ogami

Keiya Nishida

Toshio Yamada

Susumu Takayama

Jun Bota

Hideo Yamaha Hatsudoki Kabushiki Kaisha Fujita

Hideo c/o Yamaha Hatsudoki KK Fujita

Hideo c/o Yamaha Hatsudoki Kabushiki K Fujita

The present invention provides a power generation device that can not only reduce the generation of vibration but also increase thermal efficiency. A power generation device (A) includes: an engine () in which a right crankshaft () and a left crankshaft () rotate in opposite directions to each other; a right flywheel () and left flywheel () as a primary inertia body; and a power generation motor () as a secondary inertia body, a total inertia moment in a first rotation direction and a total inertia moment in a second rotation direction being balanced with each other by not less than 50%.

Power generation device and automobile

A control device controls a valve timing changer to retard a phase of an exhaust valve camshaft with respect to a crankshaft such that the time of opening of an intake valve is earlier than the time of closing the exhaust valve after a top dead center, when a determiner determines that an engine is not in a warm-up stage in a low-load operation. The control device controls the valve timing changer to advance the phase of the exhaust valve camshaft with respect to the crankshaft such that the time of closing the exhaust valve is earlier than the time of opening of the intake valve after the top dead center, when the determiner determines that the engine is at the warm-up stage in the low-load operation.

Variable valve system

A four-cycle engine () structured to introduce fresh air into a cylinder () via an intake port () opened/closed by intake valves (IN, IN) and suck exhaust gas back into the cylinder () via an exhaust port opened/closed by exhaust valves (EX, EX), wherein the exhaust port has a first exhaust port () and a second exhaust port (), and the exhaust gas is sucked in back from the first exhaust port () and secondary air is sucked in from the second exhaust port () to form, in the cylinder (), a first temperature layer (T) at a high temperature mainly composed of the exhaust gas and a second temperature layer (T) at a temperature lower than that of the first temperature layer (T) mainly composed of the secondary air.

Four-cycle engine

A valve drive device for an engine include a valve for opening or closing an opening of a port to a combustion chamber, a valve drive member for opening or closing the valve and a drive shaft for driving the valve drive member. The device also includes a variable valve timing mechanism for continuously changing a working angle of the valve corresponding to an operation state of the engine by changing a state of drive force transmission from the drive shaft to the valve drive member. A variable valve clearance mechanism is configured such that a valve clearance that is defined as a gap between the valve and the valve drive member can be set at a first value during a first condition in which the working angle of the valve is large to a second different value during a second condition in which the working angle of the valve is small.

Variable valve drive system for engine

A valve train device for an engine for driving a valve which opens and closes a valve opening of a combustion chamber comprises: a valve drive device comprising a drive member and driving force transmission mechanism. The drive force transmission mechanism is configured to transmit a driving force from the drive member to the valve. The drive force transmission mechanism comprises a transmission portion configured to transmit the driving force from the drive member to the valve and a variable portion configured to continuously change a state of the transmission portion to thereby continuously change an opening duration of the valve or the amount of valve lift. At least part of the variable portion is positioned within in the transmission portion.

Valve train device for engine

A rotational cam can be disposed on a camshaft rotationally driven by a crankshaft of an internal combustion engine. A swing cam can be swingable through the rotational cam. The swing cam has a rotational cam abutment portion which contacts the rotational cam and transmits driving force from the rotational cam to the swing cam. An abutment portion displacing mechanism can be provided for displacing the rotational cam abutment portion to change a relative distance between the rotational cam abutment portion and a center axis of the swing shaft. Changing the relative distance allows changing a lift and the like of a valve.

Variable valve train mechanism of internal combustion engine

A valve drive mechanism is provided for opening and closing a valve of an engine. The device comprises a valve drive device and a swing member pivotally supported on a swing member support shaft. The swing member is driven to pivot about the swing member support shaft by the valve drive device. A cam surface is formed on the swing member. The cam surface is configured to transfer motion of the swing member to a second member of the valve drive device. The cam surface comprises a first portion that is configured to contact the second member while the valve is moving from a closed or substantially closed position to an open position and a second portion configured to contact the second member when the valve is closed or substantially closed. A width of the second portion of the cam surface is smaller than a width of the first portion of the cam surface.

Valve mechanism for internal combustion engine

A valve drive mechanism for actuating a valve of an internal combustion engine includes a cam member with a cam surface having a first portion and a second portion. A roller is configured to rotate and contact the first portion of the cam surface when the valve is in a closed position and the second portion of the cam surface with the valve is in an open position. The cam member and the roller are configured to reciprocally move relative to each other to open and close the valve. When the roller contacts the first portion, a gap within the valve drive mechanism exists between components of the valve drive mechanism on a downstream side of a force transmission path to the valve with respect to a contact point between the roller and the cam surface. A spring member urges the roller and the cam surface into contact with each other during motion between the cam member and the roller.

Valve mechanism for an internal combustion engine

A valve train device for an engine is configured to pivot a rocker arm supported on a rocker arm support shaft to drive a valve which opens and closes a valve opening formed in a combustion chamber. The device comprises a valve drive device and a swing member pivotally supported on a swing member support shaft and driven to pivot about the swing member support shaft by the valve drive device. A control arm is disposed between a swing cam surface formed on the swing member and a rocker-side surface formed on the rocker arm. The control arm is configured for transferring motion of the swing cam surface to the rocker-side surface. A displacement mechanism is provided for displacing a contact point between the control arm and the swing cam surface and a contact point between the control arm and the rocker-side surface. The rocker-side surface has an arcuate shape which arcs about a center of pivoting motion of the swing member and wherein the rocker-side surface or an extension of the rocker-side surface about said center of pivoting motion of the swing member passes in substantially near a center of swing of the rocker arm.

A valve train device is provided for swinging a rocker arm, which is pivotally disposed on a rocker arm support shaft. The device comprises a drive device for driving the rocker arm, an intermediate member disposed between the drive device and the rocker arm and configured to transfer movement of the drive device to the rocker arm, and a displacement device. The displacement device is configured to displace a contact point between the rocker arm and the intermediate member to continuously adjust at least one of the valve opening duration and valve lift.

Valve train device for an engine

A valve train device for an engine is adapted to pivot a rocker arm supported on a rocker arm support shaft to drive a valve which opens and closes a valve opening formed in a combustion chamber. The device comprises a valve drive device and a swing member pivotally supported on a swing member support shaft and driven to pivot about the swing member support shaft by the valve drive device. An intermediate rocker member is pivotally supported on the rocker arm support shaft. The intermediate rocker member is provided between a swing cam surface formed on the swing member and a rocker face formed on the rocker arm, for transmitting the movement of the swing cam surface generated by the valve drive device to the rocker face. An intermediate rocker moving mechanism is configured to rotate the rocker arm support shaft and thereby move a first contact point between the intermediate rocker member and the swing cam surface and a second contact point between the intermediate rocker member and the rocker face to continuously vary at least one of the valve opening duration and the amount of valve lift.

The present invention has an object to effectively prevent deterioration of combustion characteristics when engine temperature is low. There is provided an intake pressure controller that effects control such that, when an operating condition discriminator that identifies engine temperature identifies low engine temperature after engine start-up, control by an engine controller (feedback controller ) that performs engine control on fluctuation of intake negative pressure to decrease the intake negative pressure is suppressed until the temperature of the intake passage rises to at or above a predetermined value, and such that the intake negative pressure is made larger.

Engine control system

Lubricating device for engine-driven supercharger

A mechanical supercharger of an internal combustion engine has a housing formed with inlet and outlet ports and a pair of spiral screws rotatably received in the housing for partially compressing air introduced in the mechanical supercharger and carrying it from the inlet port to the outlet port. The supercharger is disposed after a throttle valve in an intake system of the engine, and is provided with a relief port allowing compressed air to be relieved from the supercharger. The relief port is formed in the housing between the inlet and outlet ports where air is compressed to allow compressed air to be relieved. A relief valve is controlled to variably open according to engine operating conditions and relieve compressed air in the supercharger.

Growing community of inventors

Hiroshima, Japan

Koichi Hatamura