Toyota Jidosha Kabushiki Kaisha

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Kazuchika Tashima

Hiroki Tamura

Hitoshi Kamura

Kenji Goto

Hideyuki Oda

Atsuyoshi Kojima

Tomohiro Fujita

Hiromasa Suzuki

Atsushi Takeda

Masato Yoshida

Katsuhiko Miyamoto

Yuji Suzuki

Nobuaki Murakami

Kazumasa Iida

Hiromitsu Ando

Naoya Okubo

Masahiko Teraoka

Toshiro Nomura

Hiroyuki Tanaka

Katsunori Kaneko

Kenichi Nakamori

Hiroki Asayama

Takashi Ohta

Toshio Yoshidome

Hironobu Sato

Kenji Misaki

Masato Tojo

Mikiji Watanabe

Seiji Iwashita

Akihiro Hanai

Hatsuki Morinaga

Keiichi Kaneshige

The present invention provides an abnormality detection device in which the fuel property sensor is disposed in a branch flow path which is such that there is a time where the fuel in the branch flow path drops out therefrom between one start of the internal combustion engine and the next start. An output value of the fuel property sensor generated when the fuel is flowing through the branch flow path is acquired as a first sensor output value. An output value of the fuel property sensor generated when the fuel in the branch flow path drops out therefrom is acquired as a second sensor output value. The first sensor output value and the second sensor output value are used as judgment data to judge whether the fuel property sensor is abnormal.

Abnormality detection device for internal combustion engine

A fuel supply device has a main line, a fuel pump, a first return line, a second return line, a valve mechanism, a first pressure regulator, and a second pressure regulator. The fuel pump pressurizes the fuel in the fuel tank and supplies the fuel to a fuel distribution pipe via the main line. The first return line returns the fuel from the fuel distribution pipe to the fuel tank. The second return line is branched from the main line and returns the fuel from the main line to the fuel tank. The valve mechanism selectively connects and disconnects the second return line with respect to the main line. The first pressure regulator is arranged in the first return line. The second pressure regulator is provided in the second return line and adjusts fuel pressure to a lower level than the first pressure regulator does.

Fuel supply device for internal combustion engine and control device for the fuel supply device

A fuel injection control apparatus for an internal combustion engine injects fuel from a fuel injection valve in each cylinder in a fuel injection mode in which an amount of fuel in the combustion chamber corresponds to a required value for starting the internal combustion engine when fuel in the combustion chamber is combusted in each cylinder after a crankshaft angle is determined through cranking for starting the internal combustion engine. When the fuel has a high alcohol concentration and is combusted after the determination of the crankshaft angle, the control apparatus sets the fuel injection mode for fuel with a high alcohol concentration as the fuel injection mode in which the amount of fuel in the combustion chamber corresponds to the required value for starting the internal combustion engine.

Fuel injection control apparatus for internal combustion engine

When it is detected in a fuel supply device for a flexible-fuel internal combustion engine that a refueling operation has been performed for a fuel tank, a return suppression process in which fuel in a delivery pipe is prohibited from returning to the fuel tank through a high-pressure return passage is executed until a concentration learning process is started. After the concentration learning process is started, a compulsory return process in which fuel in the delivery pipe is compulsorily returned to the fuel tank through the high-pressure return passage is executed.

Fuel supply device for flexible-fuel internal combustion engine

A fuel injection controller includes a correcting section that performs a concentration learning procedure in which a concentration of the alcohol of the fuel in a fuel tank is learned as a learned concentration value based on a detection value of the oxygen concentration sensor, and also corrects a fuel injection amount of an injector connected to a delivery pipe in correspondence with the learned concentration value in such a manner that an air-fuel ratio corresponding to a stoichiometric air-fuel ratio is obtained. A refueling detecting section detects that refueling has been carried out to the fuel tank, and a restricting section performs a restricting procedure in which returning of the fuel from the delivery pipe to the fuel tank through a return passage is restricted on condition that the refueling detecting section has detected that the refueling has been performed.

Fuel injection controller of flexible fuel internal combustion engine

A high-pressure return passage returns excess fuel in a delivery pipe that is connected to an injector to a fuel tank. An upstream end of the high-pressure return passage is connected to the delivery pipe via a high-pressure regulator. A vertically lower portion of the high-pressure return passage is vertically below the upstream end and the downstream end. A low-pressure return passage returns excess fuel in a main passage to the fuel tank. The switch valve switches the open state and the closed state of the low-pressure return passage. A control section controls the switch valve to the closed state after the engine is stopped and drives the fuel pump so as to execute a forced return process that flows fuel into the high-pressure return passage.

Fuel supply system for internal combustion engine

There is provided a hybrid car which includes an internal combustion engine; an electric motor disposed coaxially with a rotary shaft of the internal combustion engine; a planetary gear mechanism which is disposed coaxially with the rotary shaft of the internal combustion engine and the rotary shaft of the electric motor, and is comprised of a sun gear, a ring gear, planetary pinions, and a carrier supporting the planetary pinions; a transmission comprising an input shaft to which power is transmitted from said internal combustion engine and said electric motor via said planetary gear mechanism and an output shaft connected to driving wheels; and a rotation restricting device that properly restricts rotation of a rotor of the electric motor.

Hybrid vehicle

A control system for a continuously variable transmission, in which a responsiveness and a generation of an excessive force in a steady state are compatible. The control system makes a belt slippage prevention and a fuel economy improvement compatible by controlling a CVT with one of two parameter values: the first parameter value which is determined from an engine RPM and an accelerator opening, i.e., a torque information quick in the output timing but poor in the precision and which indicates the engine output torque; and the second parameter value which is determined from a fuel injection rate, i.e., a torque information excellent in the precision but slow in the output timing and which indicates the engine output torque.

Control system and method for continuously variable transmission

Control apparatus for an in-cylinder injection spark-ignition internal

In order to securely prevent knocks from occurring upon starting and the like, while enhancing the compression ratio in a spark ignition type in-cylinder injection internal combustion engine which includes a fuel injection valve for directly injecting fuel into a combustion chamber, fuel is injected during a compression stroke in a specific operation region under an intermediate to high load to perform stratified combustion. Further provided is a control unit for driving and controlling the fuel injection valve such that, in the stratified combustion, prior to the fuel injection during the compression stroke, fuel is injected from the fuel injection valve during an intake stroke by such an amount that fuel fails to self-ignite.

Spark ignition type in-cylinder injection internal combustion engine

Controller of in-cylinder injection spark ignition internal combustion

When starting of an in-cylinder injection engine 1 is detected, a cylinder discrimination, which discriminates each cylinder, is effected. After each cylinder is discriminated, it is determined whether or not a water temperature detected by a water temperature sensor 16 exceeds a predetermined value. When the water temperature is below the predetermined value, fuel injection is started from the fuel injection valve 4 of a cylinder subjected to at least one compression stroke. Thereby, the cylinder discrimination is effected quickly, and it is made possible to raise the temperature within the combustion chamber 5, by means lapse of at least one compression stroke, at low water temperatures at which the starting ability tends to be deteriorated, and the starting ability of the in-cylinder injection engine 1 at low water temperatures is improved while shortening the starting time.

Control device and control method for internal-combustion engine

Fuel injection control system for in-cylinder injection internal

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Toyota, Japan

Kazuchika Tashima