Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Koji Terada

Kenichiro Nakamura

So Nakaura

Osamu Emizu

Shinsuke Kawakubo

Hiroshi Yokota

Toru Kisaichi

Junya Watanabe

Kenichi Nakano

Hiroshi Yamaura

Kazuo Miyamoto

Shinya Wakabayashi

Masaya Murao

Yuko Akamine

Noboru Yamashita

Takayuki Osako

Ryushi Tsubota

Yoshiyuki Kasai

Internal-combustion engine

Outboard motor for a vessel

In a hydraulic tensioner device in which a high hydraulic pressure chamber is configured between a plunger accommodation hole of a tensioner body accommodating a plunger and the plunger to attenuate reactive force acting on the plunger, the tensioner body includes, in a discharge oil passage for discharging oil leaked from the high hydraulic pressure chamber, a pressure maintenance valve for opening and closing the discharge oil passage, air release passages are formed inside the pressure maintenance valve, and an air release valve for releasing air and preventing air from back flowing is provided in the air release passages.

Hydraulic tensioner device

A chain tensioner includes a base frame secured to each of front and rear banks, a slider plate shiftable in the extending direction of the base frame, and a tensioner provided to straddle between the base frame and the slider plate. The slider plate is biased to elastically deform and arcuately bend the tensioner, which applies a tensile force to each of cam chains transmitting the rotation of a crankshaft. In the chain tensioner, upper securing portions are provided in an upper portion of the base frame so as to be secured to each of the front and rear banks in the bending direction of the tensioner. A lower end of the base frame extends to a position facing the inside of the crankcase to provide a lower securing portion which is secured to each of the front and rear banks perpendicularly to the bending direction of the tensioner.

Chain tensioner for internal combustion engine

A power unit includes a cam damper mechanism having a cam member reciprocally and unrotatably provided on one of a pair of bevel gears, and rotatably provided on an extended shaft; a lifter member slidably and unrotatably provided on the extended shaft in an axial direction; a damper spring configured such that one end portion thereof is supported on a first flange portion of the extended shaft, and the other end portion thereof biases the lifter member toward the cam member in an axial direction by abutting on the lifter member, and the biasing force is supported by the one bevel gear. The extended shaft has the one of the bevel gears and the cam damper mechanism between the first flange portion and a first bearing, and is accommodated in the bevel gear case so as to be fixed to a bevel gear holder along with the first bearing.

Power unit of shaft drive type vehicle

A vehicle internal combustion engine wherein the vertical height of a crankcase is made short in addition to making short the anteroposterior (front to back) length of the crankcase. A vehicle internal combustion engine is configured such that a crankshaft, a main shaft, a counter shaft and an output shaft are arranged in parallel in a crankcase with the main shaft being disposed to the rear of the crankshaft and the counter shaft is disposed to the rear of the main shaft. The output shaft is disposed below and forward of the counter shaft.

Vehicle internal combustion engine

A multi-cylinder internal combustion engine includes a one-side crank chamber and an other-side crank chamber formed by partitioning a lower crankcase by a plurality of lower support walls which are provided integrally with the lower crankcase and support a crankshaft. A plurality of oil outflow holes respectively communicate with the one-side crank chamber and the other-side crank chamber through which oil is discharged from the one-side crank chamber and the other-side crank chamber. An oil discharge port is provided along a lower support wall of the one-side crank chamber and the other-side crank chamber. A suction port of a scavenging pump for discharging the oil present in the one-side crank chamber and the other-side crank chamber is provided in an outer wall in the manner of straddling the lower support wall.

Multi-cylinder internal combustion engine

A lubricating oil feeding structure that permits an adequate amount of lubricating oil to be fed to those parts around the transmission while avoiding an excess supply of lubricating oil to the lubricating oil passage in the shaft of the transmission. The transmission has a space (as a recess to hold the shaft therein) in which is arranged the oil guide part. The oil guide part has the bottomed cylinder, with its one end opened, the flange that flares outward at the open end of the bottomed cylinder, and the oil holes that communicate between the inside and the outside of the bottomed cylinder. The oil guide part is arranged in the space in such a way that the flange comes into contact with the outer race of the bearing.

Lubricating oil feeding structure

An ignition device attachment structure for an internal combustion engine includes an ignition plug tube inserted between a cylinder head cover and an ignition device insertion hole formed in a cylinder head of the internal combustion engine. The ignition plug tube bulges from an upper end of the ignition plug tube to an intermediate portion of the ignition plug tube on a lateral surface of the ignition plug tube.

Ignition device attachment structure for internal combustion engine

An electric motor is cooled by an air flow without restricting the degree of freedom in the arrangement of an oil cooler and an oil filter by utilizing a front face of a front portion of an engine body to arrange the electric motor. The engine includes an oil cooler, an oil filter, and an starter motor for driving a crankshaft to rotate. The oil cooler and the starter motor are disposed on a front face, which is directed in an advancing direction of the vehicle, of a front portion of a lower block which forms an engine body. The oil filter is attached to an attachment seat provided on a side face of the front portion which is directed in the sideward direction. A communication oil path for communicating the oil cooler and the oil filter with each other is provided in the inside of the front portion.

Internal combustion engine for vehicle

A V-type, multicylinder internal combustion engine with multiple isolated crank chambers formed by partitioning a space inside of a crankcase with multiple support walls for supporting a crankshaft, and multiple oil outlet holes, respectively communicating with the isolated crank chambers to separately discharge oil from the multiple isolated crank chambers, uses a single scavenging pump to discharge the oil from the isolated crank chambers rather than connecting multiple scavenging pumps, respectively, to the oil outlet holes. The engine includes an oil collecting pan mounted on a bottom wall of a crank chamber covering the multiple oil outlet holes respectively communicating with the multiple isolated crank chambers for collecting the oil passed through the oil outlet holes. The oil collecting pan has an oil reservoir with an oil outlet opening, and a single scavenging pump for drawing the oil stored in the oil collecting pan through the oil outlet opening.

Multicylinder internal combustion engine

The inside of a crankcase for a four-cycle engine is divided by a bulkhead into a crank chamber and a transmission chamber. A crankshaft and a balancer shaft for suppressing engine vibrations by rotating in accompaniment with rotations of the crankshaft are rotatably attached within the crankshaft, and the balancer shaft is driven by the crankshaft via a gear set housed within the crank chamber. Meshing parts of a gear set can be sufficiently lubricated by oil mist without a special lubricating structure being required. Furthermore, the engine can be decreased in size without forming a sealed space for lubricating the gear set.

Growing community of inventors

Saitama, Japan

Koji Terada