Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Denso Corporation

Aisan Kogyo Kabushiki Kaisha

Aisan Industry Co., Ltd.

Susumu Kojima

Keiso Takeda

Tomojiro Sugimoto

Yusuke Suzuki

Shinji Sadakane

Hiroki Ichinose

Naoki Nakanishi

Yukihiko Ideshio

Nobuhiko Koga

Akihiro Sato

Jun Yamada

Norihiko Nakamura

Kenji Katoh

Yasuyuki Kato

Makoto Koike

Hidefumi Aikawa

Makoto Nakagawa

Hiroshi Miyagawa

Tomoji Ishikawa

Rio Shimizu

Rioh Shimizu

Masaki Ikeya

Keiji Toh

Nobuhiko Koyama

Shintaro Matsutani

Terutoshi Tomoda

Kingo Okada

Toshihiko Muramatsu

Motoki Ohtani

Fumiaki Hattori

Kiyoshi Yamazaki

Kei Masuda

Shohei Matsumoto

Hideaki Kosuge

Shinzo Kobuki

Keisuke Komori

Rui Onoda

Kosuke Suzui

Keisuke Hagiwara

Masayuki Akita

Jin Tanaka

Kazuhiro Yonesige

A control device for an engine of the invention executes an automatic stop control for stopping stop a rotation of a crank shaft when a predetermined automatic stop condition is satisfied. The device acquires a focused peak value of the engine speed appearing after a time when a rotation direction of the crank shaft first reverses while the automatic stop control has been executed, determines, based on the focused peak value, whether there will be an excessive peak value expected to depart from a predetermined permission range after the focused peak value appears, and executes a starter start control for driving the starter, restarting the fuel supply and igniting the fuel to restart an operation of the engine when a predetermined restart condition is satisfied, the engine speed is within the predetermined permission range and it has been determined that there will be no excessive peak value.

Control device for internal combustion engine

A control apparatus for a four-cycle internal combustion engine that includes a plurality of cylinders into which fuel is directly injected, includes an electronic control unit. The electronic control unit is configured to: (i) execute stop control that stops rotation of a crankshaft of the internal combustion engine by stopping fuel injection and ignition in the internal combustion engine when a predetermined stop condition is fulfilled; and (ii) carry out fuel injection and ignition in a second cylinder of the plurality of the cylinders when the stop control is executed, the second cylinder being in an exhaust stroke when the internal combustion engine is stopped, when a piston of a first cylinder of the plurality of the cylinders is estimated to stop at a top dead center.

Control apparatus and control method for internal combustion engine

A control device of a vehicle including an engine, an electric motor, and a clutch disposed on a power transmission path between the engine and the electric motor, the control device of a vehicle performing an ignition start causing combustion in a cylinder of the engine to rotate the engine at a start of the engine, the control device of a vehicle switching a cylinder in which combustion is first caused in the engine based on an actuation during a rotation stop process of the engine of an exhaust valve in a cylinder stopped in an expansion stroke, when performing the ignition start at the start of the engine.

Vehicle control device

The invention relates to a control device of a multi-cylinder internal combustion engine. The control device starts executing an ignition engine start control to restart the engine operation when a predetermined engine restart request is generated, a last signal output from a crank angel sensor corresponds to the compression TDC and a signal is output from the sensor before a time elapsing from the output of the last signal reaches a predetermined time. The control device starts executing a starter engine start control when the engine restart request is generated, the last signal output from the sensor corresponds to the compression TDC and no signal is output from the sensor before a time elapsing from the output of the last signal reaches the predetermined time. The control device sets the predetermined time on the basis of a last engine speed acquired on the basis of the last signal and a signal output from the sensor immediately before the last signal is output such that the predetermined time set when the last engine speed corresponds to a first engine speed, is longer than the predetermined time set when the last engine speed corresponds to a second engine speed larger than the first engine speed.

Control device of multi-cylinder internal combustion engine

The control device executes a first control for controlling a throttle valve opening degree to a first opening degree when a particular condition is satisfied. The particular condition is a condition that it is predicted upon a satisfaction of an engine stop condition that a level of one of noise and vibration generated in an interior of a vehicle from a source other than an engine is equal to or larger than a predetermined level when an engine rotation stops. The control device executes a second control for controlling the throttle valve opening degree to a second opening degree larger than the first opening degree without executing the first control when the particular condition is not satisfied upon the satisfaction of the engine stop condition.

A control unit according to the present invention performs an automatic stop control in which an injection of fuel from a fuel injection valve is stopped to stop a rotation of an engine when an automatic stop condition is satisfied. Furthermore, the control unit performs a first injection, in which fuel is injected from the fuel injection valve of a cylinder in an expansion stroke, and an ignition operation for igniting the fuel injected by the first injection, when a restart demand occurs after an initiation of the automatic stop control. In addition, the control unit performs a second injection, in which fuel is injected from the fuel injection valve of a cylinder in a compression stroke, and an ignition operation for igniting the fuel injected by the second injection. Then, the control unit performs a third injection, in which fuel is injected from the fuel injection valve of a cylinder in a compression stroke, when it judges that a start-up failure for which a crank angle of the cylinder which is in the compression stroke after the second injection cannot get over the compression top dead center occurs or will occur.

Control unit for a multi-cylinder internal combustion engine

The invention relates to a control device of a vehicle provided with a multi-cylinder internal combustion engine comprising a catalyst in an exhaust passage. When a state of an ignition switch has been changed from an on-state to an off-state and a rotation of the engine has stopped, the control device causes a fuel injector to inject fuel into a combustion chamber of a particular cylinder in which an intake valve is closed and an exhaust valve is open and causes an ignition device to ignite the fuel.

Control device of vehicle

When the temperature in a cylinder of an engine is low, the fuel injection amount of fuel that has a low vapor pressure and is less likely to be vaporized is increased, and the fuel injection amount of fuel that has a high vapor pressure and is more likely to be vaporized is reduced, so that the start timing of the engine can be kept constant. When the temperature in the cylinder is high, the fuel injection amount of the fuel that has a low vapor pressure and is more likely to be decomposed is reduced, and the fuel that has a high vapor pressure and is less likely to be burned (decomposed) is increased, so that the start timing of the engine can be kept constant. Thus, the start timing of the engine is kept constant irrespective of the fuel property, and deterioration of the drivability can be curbed.

Control system for internal combustion engine of vehicle

A control device according to the present invention performs an automatic stop control in which an injection of fuel from a fuel injection valve is stopped and a rotation of an engine is stopped when an automatic stop condition is satisfied. Furthermore, the control device controls an injection operation of fuel and an ignition operation to the fuel in consideration of compression when the fuel is actually ignited in an expansion stroke cylinder, when a re-start demand occurs after an initiation of the automatic stop control and the engine is to be re-started by an ignition start-up. Specifically, the control device predicts a crank angle at an actual ignition time point in a case where processing for performing the ignition start-up at the present time whenever a predetermined time period has passed. Then, the control device initiates the ignition start-up when the crank angle falls within a predetermined range in which a sufficient compression can be attained. Thereby, the engine is more certainly re-started by the ignition start-up.

Control device for an internal combustion engine

A start control device of a vehicular direct injection engine provided in a vehicle is configured to execute an ignition start to raise rotation of the direct injection engine at a start of the direct injection engine by fuel injection and multiple sparking performed for a predetermined cylinder in an expansion stroke out of multiple cylinders of the direct injection engine, the start control device of a vehicular direct injection engine reduces the number of times of sparking for the predetermined cylinder at the time of an ignition start of the direct injection engine as compared to an ignition start performed before the current ignition start based on ignition timing of the ignition start performed before the current ignition start.

Controller for starting vehicular direct-injection engine

A control apparatus for an internal combustion engine that can be a four-cycle engine including cylinders into which fuel is directly injected, the control apparatus includes an electronic control unit. The electronic control unit is configured to execute a fuel injection and an ignition for the cylinder in an expansion stroke on a condition that a stop of the piston in any one of the cylinders at vicinity of a top dead center after a compression stroke is predicted when the electronic control unit is configured to stop the fuel injection and the ignition for the internal combustion engine upon fulfillment of a predetermined stop condition.

A control device () of a cylinder direct injection type internal combustion engine () controls a fuel injection device () and an ignition device (), executes injection of the fuel and ignition over multiple times, and executes a control of varying an interval between a timing of the injection of the fuel and a timing of the ignition, at the time of an ignition start in which the fuel is injected into a combustion chamber () in an expansion stroke with rotation of an output shaft () is stopped state and the fuel is ignited to start the rotation of the output shaft (). The control device () varies the interval between the timing of the injection of the fuel and the timing of the ignition by adjusting a correlation of a pitch of the injection of the fuel over multiple times and a pitch of the ignition over multiple times. Therefore, the internal combustion engine () and the control device () have an effect of being able to enhance the starting property.

Internal combustion engine and control device of internal combustion engine

A fuel supply system for an internal combustion engine includes a heat exchanger that has a heat exchanging wall between a liquefied fuel passage and an engine coolant passage. Heated and vaporized fuel flowing out from the liquefied fuel passage of the heat exchanger is supplied to the internal combustion engine. A flow rate of liquefied fuel supplied to the liquefied fuel passage of the heat exchanger is set. A flow rate of engine coolant supplied to the engine coolant passage of the heat exchanger is determined on the basis of a temperature of the engine coolant supplied to the engine coolant passage of the heat exchanger such that nucleate boiling or transition boiling of the liquefied fuel in the set flow rate occurs near a boundary between nucleate boiling and transition boiling in the liquefied fuel passage.

Fuel supply system and fuel supply method for internal combustion engine

When a K0 clutchis interrupted to stop a direct injection engineduring vehicle running, if a stop position of a crankshaftis out of a range of a target stop range &#x3c6;target, the once interrupted K0 clutchis temporarily frictionally engaged to slightly rotate the crankshaft. As a result, the crankshaftstopped near compression TDC (top dead center) is rotated to and stopped in a minimum region of pumping energy in combination with a pumping action. Since the minimum region of the pumping energy overlaps with the target stop range &#x3c6;target suitable for ignition start associated with a small assist torque at the time of engine start, the ignition start can properly be performed at the next engine start and the assist torque at the time of engine start can be reduced.

Engine stop control device for hybrid vehicle

A control device of a vehicle drive device includes a direct injection engine, an electric motor, and a clutch selectively coupling the direct injection engine to a power transmission path from the electric motor to drive wheels, the control device slips the clutch and starts the direct injection engine by an ignition start with fuel injected into a cylinder of the direct injection engine and ignited from a start of rotation of the direct injection engine if the direct injection engine is started during a running mode using only the electric motor as a drive source, the control device weakens an engagement force of the clutch if a shaft torque of the direct injection engine goes through a first negative torque extreme value after initiation of a start of the direct injection engine and becomes zero from a negative torque as compared to before becoming the zero.

Control device for vehicle drive device

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Susono, Japan

Susumu Kojima