Toyota Jidosha Kabushiki Kaisha

Taiho Kogyo Co., Ltd.

Nippondenso Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Koyo Seiko Kabushiki Kaisha

Nihon Metal Gasket Kabushiki Kaisha

Toyota Jidosha Kogyo K.k.

Yukio Kawai

Takeshi Kitamura

Osamu Jinno

Yoshiyuki Hagiwara

Kenichi Yamaguchi

Akio Kuramoto

Hirotaka Kakuta

Toshihisa Ogawa

Hiromi Otsuki

Seietsu Yoshida

Takashi Kondo

Hiroshi Okano

Kazuya Yoshijima

Yoshikazu Shinpo

Yasuhiro Kawabata

Kosaku Ueta

Shoji Ito

Akira Ii

Kazuya Nakata

Michio Morishita

Ryosuke Fujiki

Masao Ito

Mitsunori Sasano

Seiji Ohmura

Fusaji Ohmura

Masahiko Nakada

Masaharu Adachi

Yoshiki Maruchi

In a cooling unit for an engine comprising a cylinder blockhaving a water jacketwhich opens into the surface of the cylinder blockand which circulates a cooling water in surrounding relationship with a cylinder bore, and a gasketheld sandwiched between the cylinder head and the cylinder blockto seal therebetween, the gasketis provided with a control boardwhich project into the water jacketfor controlling a flow of the cooling water, the control boardbeing formed to be arcuate in conformity to the profile of the water jacketand disposed toward the intake port.

Engine cooling device

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurarity of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may be disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

Metal gasket

A metal gasket having first and second base plates made of metal. In each base plate, at least an opening is defined and a bead is formed around the opening. The second base plate is disposed in parallel with the first base plate with the tip ends of the beads of the first and second base plates facing each other. An annular metallic shim is secured to the first base plate at the side of the bead between the inner periphery of the bead and the opening. And, a resilient sealing member is deposited on the second base plate at the side of the bead around the outer periphery of the bead. A non-vulcanized coating layer of fluoro rubber containing no vulcanizing agent may be deposited on the entire surface of the second base plate at the side of the bead. A vulcanized fluoro rubber may be deposited on the non-vulcanized coating layer at the side of the bead around the outer periphery of the bead.

Metal gasket with base plate having coatings of diverse thicknesses

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurality of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may be disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

The invention is directed to an arrangement for sealing a clearance between a cylinder head and a cylinder block of an engine with a metal gasket clamped therebetween. The metal gasket is formed of a metallic base plate which has a plurality of openings and beads formed therearound. The base plate may include annular shims welded on the base plate around the openings and a resilient sealing member deposited on the base plate surrounding the openings. The gasket may De disposed in such a manner as to place tip ends of the beads toward the cylinder block which causes a smaller displacement relative to the beads in comparison with the cylinder head. The resilient sealing member may be arranged to have a section of different dimension between a portion located at a side facing the beads and other portion at the opposite side thereof, or between a portion located at a junction where two of the beads meet and other portion.

Metal gasket with welded shim

A main metallic gasket body is formed by interposing an intermediate plate between two elastic metallic plates, each of which have a bead formed around combustion chambers. The intermediate plate is divided into two pieces, steps are formed by the two pieces, and spaced formed between the pieces are provided with thermal spray stoppers.

Metallic gasket

An electromagnetic fluid flow control valve mechanism has a hollow slide valve linearly movable on and along a core in response to energization of a coil disposed around the slide valve for selective fluid communication between a inlet port and first and second outlet ports through a chamber in a casing. The ratio of a cross-sectional area of the inlet port to that of each of the first and second outlet ports is selected such that the chamber will develop a relatively small vacuum such as of 20 mmAg at maximum. Preferably, the ratio is 6.5 or greater. This arrangement prevents a fluid, typically air, from flowing from the second outlet port back into the chamber.

Electromagnetically operable fluid flow control valve mechanism

Disclosed is a suction pipe pressure detection apparatus for detecting suction pipe pressure of a multi-cylinder type internal combustion engine provided with a throttle valve in the suction pipe of each of the cylinders, or a so-called independent suction type internal combustion engine. The apparatus detects the suction pipe pressure for just a few cylinders out of the total number of cylinders, makes proper corrections to the detected data in accordance with the throttle valve opening, engine speed of the internal combustion engine, etc., and, during the period before the next detection of the suction pipe pressure is made, accurately computes, using the above data, the suction pipe pressure for the cylinders, under the suction stroke, for which the pressure is not actually detected. That is, the throttle opening and the engine speed of the internal combustion engine are detected at intervals of shorter periods of time than those intervals at which the suction pipe pressure is actually detected, and correction is continuously made to the earlier detected suction pipe pressure according to the above detected data. The present invention enables a high-degree controlling of the internal combustion engine by making highly accurate suction pipe pressure data available at rather high frequency, and by further continually providing the intake air quantity, and the fuel injection amount, with considerable high accuracy.

Suction pipe pressure detection apparatus

An air-fuel ratio compensating apparatus for the carburetor of an internal combustion engine has first and second valves having equal control (input) current-opening characteristics and provided in main and slow system air bleed paths respectively to control sectional area of flow in the main and slow system air bleed paths in relation to the output of an air-fuel ratio sensor, electronic control circuit which sends the control current to the first and second valves in such a way that the opening of the second valve is always larger than that of the first valve. Thus, flow of the main system air bleed is restrained during the initial part of the acceleration period so as to reduce the amount of noxious component in the exhaust gas.

Air-fuel ratio compensating apparatus for internal combustion engine

An air flow control valve means for controlling air bleed of internal combustion engine. The air flow control valve means includes a valve housing, an air cleaner means attached to the valve housing, and a valve element adapted for opening and closing the air passage communicated with the air bleed passage. The valve housing is provided with tubular portions projected to the upstream side as viewed in the direction of flow of air introduced into the valve housing. The tubular portion has therein a bypass air passage which open at the end portion of the tubular portion. According to this arrangement, it is possible to avoid any foreign matters from coming into the bypass passage.

Air flow control valve means

A fluid control valve assembly for controlling the flow of fluid passing through a fluid passageway defined in a valve body and having an inlet end and an outlet end. A bellows formed of low tackiness material has fixed one end wall secured to the valve body and the other movable end wall connected to a valve stem. The valve stem is actuated by an actuator to move the other movable end wall of the bellows between a closed position in which the other movable end wall is brought into direct contact with a valve seat located in the fluid passageway and an open position in which the other movable end wall is brought out of engagement with the valve seat.

Fluid control valve assembly

A device for controlling air-fuel ratio for an internal combustion engine with a use of the signal from an oxygen sensor adjacent to a three-way catalytic converter, the device comprising throttle sensor for detecting the transient running state of the engine and supplying the detected signal to a controller, integration by an integration circuit in the controller being commenced at a predetermined value produced in an initial voltage setting circuit in the controller, regardless of the preceding value of the output of the integration circuit, in such a transient state as a sudden deceleration.

Device for controlling air-fuel ratio for internal combustion engines

An oil seal apparatus, particularly for use with a vehicle engine, wherein an oil seal coacts between a stationary casing and a rotatable shaft which projects through the casing. The oil seal apparatus includes an annular elastomeric seal member having a pair of axially spaced annular lip portions disposed for engagement with the shaft. One lip portion is positioned innermost for creating an oil seal, and the other lip portion is positioned outermost for creating a dust seal. This other lip portion is provided with a auxiliary annular lip which projects axially outwardly along the shaft. The auxiliary lip has an annular groove around its periphery to facilitate transfer of water around the seal member and prevent the water from flowing axially inwardly along the shaft past the dust seal.

Growing community of inventors

Toyota, Japan

Yukio Kawai