Toyota Jidosha Kabushiki Kaisha

Other

Denso Corporation

Toshio Imamura

Yuu Yokoyama

Yoshiaki Miyazato

Masaki Numakura

Yoshiki Endo

Kenji Kanehara

Shinji Sadakane

Tohru Yoshinaga

Akihiko Takenaka

Hiroyuki Ishii

Masaki Takeyama

Takanobu Kawano

Motoki Ohtani

Fumio Takamiya

Katsuyuki Tanaka

Yoshihiro Nakase

Katsuhiko Aoyama

Yoichi Sugiura

Yuu Ueda

Yukihisa Hirano

Syouzo Kobayashi

Satoshi Yoshi

Ishii Hiroyuki

Yasushi Hibino

When a start-up failure occurs wherein an internal combustion engine equipped with a variable valve device does not transition to complete combustion before a first prescribed period &#x3b1; elapses from the start of cranking in conjunction with fuel injection, a control unit for the internal combustion engine executes a start-up failure process addressing a state wherein the valve timing is different from a specific timing.

Control device for internal combustion engine

A variable valve actuation device for an internal combustion engine includes a variable valve timing mechanism and a valve timing restricting mechanism. When the operating state of the variable valve timing mechanism is in the phase restricting state and the operating state of the variable valve timing mechanism is changed to the phase releasing state on the basis of pressing the accelerator pedal, a torque limiting control is then performed to limit an increase in the torque of the internal combustion engine. With this control the rate of increase of the torque is set less than the rate of increase of the torque corresponding to the operation of pressing the accelerator pedal by retarding and correcting the ignition timing. Thus, when the operating state of the variable valve timing mechanism is changed from the phase restricting state to the phase releasing state, thereby reducing discomfort experienced by the driver.

Variable valve device for internal combustion engine

An IIS system that performs control related to intermittent stopping of engine operation by idling stop control is applied to an internal combustion engine including a VVT mechanism that makes the valve timing of an engine valve variable and has an intermediate lock mechanism that mechanically locks the valve timing at an intermediate lock position between a most retarded position and a most advanced position. The IIS system is configured to inhibit the engine operation from being intermittently stopped at the occurrence of a failure of the VVT mechanism to avoid the internal combustion engine from being prevented from being restarted after the intermittent stop depending on the occurrence of the failure of the VVT mechanism.

Control apparatus for internal combustion engine

A variable valve timing device for an internal combustion engine includes: a variable valve timing mechanism that changes a valve timing; and a phase limiting mechanism that locks a rotational phase between a housing rotor and a vane rotor at an intermediate phase. The phase limiting mechanism engages a first limiting pin with a first engaging groove and engages a second limiting pin with a second engaging groove to lock the housing rotor to the vane rotor. A retard-side side surface of an engaging hole is configured so as to be able to adjust a clearance between the second limiting pin and the retard-side side surface when the first limiting pin is engaged with a first advance end portion.

Variable valve timing device for internal combustion engine and manufacturing method therefor

In a V-type 8-cylinder engine in which the torque for rotating an intake camshaft is higher when intake valves of a #1 cylinder and a #3 cylinder in a left bank are closed, respective noses of a cam for opening and closing the intake valve of the #1 cylinder and a cam for opening and closing the intake valve of the #3 cylinder are each formed at a phase position displaced by X&#xb0; (X&#x3e;0) in the advance direction further from the phase position displaced in the advance direction by 90&#xb0; with respect to the nose of a cam for opening and closing the intake valve of a cylinder fired after a delay of 180&#xb0; in crank angle.

Engine with intake valves operated by camshaft

A valve system of a V-type engine in which a camshaft provided in each bank is formed with valve cams that open and close engine valves and a pump cam for driving a fuel pump, the phase of the pump cam relative to the valve cams is set such that the crank angle at which driving torque of the pump cam is maximized does not coincide with the crank angle at which driving torque of each of the valve cams is maximized.

Valve system of V-type engine

A damping chamber is formed in a pressure relaxation device connected to a high pressure fuel pipe. Valve bodies are provided at openings of partitions, and a spring force is applied to the valve bodies by a spring in a valve closing direction. When a high pressure portion reaches an inlet of the damping chamber, the valve body opens to hold and absorb the high pressure portion in the damping chamber. When a low pressure portion reaches the inlet of the damping chamber, the high pressure portion held in the damping chamber is gradually released via a restricted orifice to cancel the low pressure portion, thereby reducing the pressure pulsation of fuel.

Fuel supply system for relieving fuel pressure pulsations and designing method thereof

A cam for use in an overhead-type internal combustion engine which linearly decreases the force holding the valve against the valve seat during the valve closing to valve opening transition, with the cam having lobes for opening the engine valve and a base circle portion for closing the engine valve.

Engine cam for use in internal combustion engine

Growing community of inventors

Okazaki, Japan

Toshio Imamura