Toyota Jidosha Kabushiki Kaisha

Fujifilm Corporation

Tetsushi Suzuki

Toshiaki Tanaka

Takanori Sasaki

Atsunori Kumagai

Eiji Ito

Motoichi Murakami

Naoto Koyamaishi

Shoichi Tateyama

Hiroyuki Suzuki

Toshiki Fujiwara

Kaoru Ito

Ippei Fukutomi

Saisuke Watanabe

Norio Inami

Tomiaki Atsumi

Masashi Takeda

Ryuji Koike

Takashi Shimura

Teru Ogawa

Hiroyuki Kawakubo

Yasushi Hamada

Noriyuki Ichikawa

A lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles is provided which can exhibit excellent fuel efficiency performance and wear resistance reliability. The lubricating oil composition includes a base oil and a complex polyester mixture. The base oil includes at least one of poly-&#x3b1;-olefin, an ester-based base oil, or a partially hydrogenated mineral oil. The complex polyester mixture includes a polyester obtained by condensing a polyhydric alcohol, a polycarboxylic acid, and a monohydric alcohol having an oxyalkylene group. The content of the complex polyester mixture is 0.01% by mass or more with respect to the total mass of the lubricating oil composition, the high-temperature shear viscosity (HTHS viscosity) at 150&#xb0; C. is 1.0 mPa&#xb7;s to 2.6 mPa&#xb7;s, and the NOACK evaporation amount is 40% or less.

Lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles

A sludge adhesion inhibiting structure for an internal combustion engine according to the present invention is characterized in that a sludge inhibiting layer inhibiting generation or adhesion of sludge is formed on a surface of an area inside the internal combustion engine into which oil as a liquid does not always spread and which is contacted by oil mist as a gas. Preferably, the sludge inhibiting layer is made up of a solid alkali substance. Furthermore, the sludge inhibiting layer is provided in a head cover and formed on an inner surface of an oil separator chamber separating the oil from a blow-by gas.

Sludge adhesion inhibiting structure for internal combustion engine

An oil mist separator () for an internal combustion engine that separates an oil component in a gas, which is introduced from a crankcase of the internal combustion engine, from the gas, includes a porous filter () that separates, from the gas, the oil component in the gas, the porous filter () being provided in a passage, through which the gas passes, and being coated with a counteragent for neutralizing an acid substance.

Oil mist separator for internal combustion engine

A cylinder head of an internal combustion engine is fitted with rocker arms. Camshafts are disposed so that the rocker arms and cams will be brought into contact with each other. The camshafts are rotatably supported by lower bearings, which supports the camshafts from below, and by upper bearings integrated with a head cover. The head cover is provided with visual observation windows that make it possible to see valve system parts through the head cover. A visual observation window covers for covering the visual observation windows are fixed to the head cover.

Camshaft support structure for internal combustion engine

A camshaft support structure of an internal combustion engine () includes a camshaft () that drives an intake valve () or an exhaust valve (); a head cover () that houses the camshaft (); an upper bearing portion () which is provided on the head cover () and supports the camshaft (); a lower bearing portion () which is attached to the head cover () and makes a pair with the upper bearing portion () to retain the camshaft (); a rocker arm () that transmits driving force from the camshaft () to the intake valve () or the exhaust valve (); and a rocker arm support portion () that inhibits the rocker arm () from falling out of position by being provided near and directly above the rocker arm ().

Camshaft support structure of an internal combustion engine

A lower cam carrier is disposed over a cylinder head and a head cover is disposed thereover. The lower cam carrier has, formed as one therewith, an outer frame superposed with the edge peripheral edge of the cylinder head, and a bridging part provided between opposing sides of the outer frame part. The bridging part has a lower bearing for supporting an intake camshaft and an exhaust camshaft. The head cover has, formed as one therewith, a flange part superposed with the outer frame part and a bearing part opposing the bridging part inside the flange part. The bearing part has an upper bearing that, together with the lower bearing, supports the intake camshaft and the exhaust camshaft.

Camshaft support structure for an internal combustion engine

A cylinder head gasket is disposed between a cylinder head and a cylinder block having different coefficients of thermal expansion. The cylinder head gasket has a bore grommet including a cylinder block side portion which is enlarged in a direction away from the cylinder bore hole on an exhaust side and on an end opposite to a chain or gear casing end.

Cylinder head gasket with areas of relatively high rigidity

In a supercharged engine, a supercharger and a throttle body disposed midway in an intake passage are located away from an engine block. A blow-by gas passage constituting a PCV apparatus is connected between a portion of the intake passage located on the upstream side of a throttle valve and a crankcase. The blow-by gas passage returns the blow-by gas collected in the crankcase to the intake passage. A cooling water passage extending from the engine block is connected to a radiator. A water passage extending from the radiator is connected to the engine block via the throttle body, which water passage encloses the blow-by gas passage in an intermediate portion thereof.

Positive crank ventilation apparatus for an engine system

A crank damper pulley structure of an internal combustion engine of a car in which the hub of a pulley, which is removably fixed to the tip of the engine crank shaft and transmits power to auxiliary machinery, such as an alternator, has therearound a damper mass and a damper rubber comprising a torsional damper. The hub has a cavity therein which opens to one end of the hub. A damper support is fixed in the cavity and a ring-like damper and a ring-like damper mass are superposed axially with the rubber being fixed to the mass and the support in order to constitute a ring-like dynamic damper disposed in the cavity which copes with bending vibration of the crank shaft.

Growing community of inventors

Mishima, Japan

Tetsushi Suzuki