Toyota Jidosha Kabushiki Kaisha

Aisin Takaoka Co., Ltd.

Osamu Maeda

Koichi Yonezawa

Daigo Ando

Koichiro Muta

Kenji Itagaki

Satoshi Yoshizaki

Yoshikazu Asami

Shunsuke Oyama

Tatsuo Iida

Takahiro Sadamitsu

Tomoyuki Isogai

Kouji Nagai

Koji Nomura

Masanori Saeki

Keiichi Matsunaga

Hiroki Matsui

Atsushi Nakagaki

Satoshi Ohya

Tomoya Kato

In a hybrid vehicle, each of an engine and an MG1 is mechanically coupled to a drive wheel with a planetary gear being interposed. The planetary gear and an MG2 are configured such that motive power output from the planetary gear and motive power output from the MG2 are transmitted to the drive wheel as being combined. The engine includes a turbocharger, an EGR valve, and a WGV. When opening of the EGR valve exceeds first opening, a controller maintains opening of the WGV at second opening or larger.

Hybrid vehicle and method of engine control of hybrid vehicle

A hybrid vehicle includes: an internal combustion engine; a rotating electric machine; a planetary gear mechanism to which the internal combustion engine, the rotating electric machine and an output shaft are connected; a catalyst that purifies exhaust gas of the internal combustion engine; and a controller that controls the internal combustion engine and the rotating electric machine. The controller controls the internal combustion engine and the rotating electric machine to perform catalyst temperature control to shift an operating point on a map representing a relationship between rotation speed of the internal combustion engine and torque generated by the internal combustion engine so that the catalyst has a temperature within an appropriate temperature range. Degradation of the catalyst can be suppressed without deteriorating the function of the catalyst.

Hybrid vehicle

A vehicle includes an engine, a first MG, a planetary gear mechanism, a battery that stores power generated by the first MG and supplies the stored power to the first MG, and an HV-ECU that controls the engine and the first MG. The engine includes a turbo. A boost line is determined on a map representing a relationship between the rotation speed of the engine and torque generated by the engine, and the turbo boosts suctioned air when torque generated by the engine, as indicated by an operating point on the map, exceeds the boost line. The HV-ECU controls the engine and the first MG so that when the allowable value Wout of power output from the battery is small, the operating point exceeds the boost line at a higher rotation speed than when the allowable value Wout is large.

In a hybrid vehicle, each of an engine and an MGis mechanically coupled to a drive wheel with a planetary gear being interposed. The planetary gear and an MGare configured such that motive power output from the planetary gear and motive power output from the MGare transmitted to the drive wheel as being combined. A controller makes WGV diagnosis for diagnosing whether or not a waste gate valve is normally controllable by issuing an instruction to a WGV actuator while the controller stops combustion in the engine and controls the MGand the MGin coordination to perform motoring of the engine during traveling of the hybrid vehicle.

Hybrid vehicle and method of diagnosing abnormal condition of hybrid vehicle

When a prescribed execution condition is satisfied at the time of transition from HV traveling (that is, traveling performed by an engine and a motor with generation of traveling driving force by the engine) to EV traveling (that is, traveling performed by the motor without generation of traveling driving force by the engine), a controller of a hybrid vehicle performs motoring (or a self-sustaining operation) of an engine and thereafter stops the engine.

Hybrid vehicle and method of cooling turbocharger

An HV-ECU performs processing including calculating requested system power, calculating requested engine power when an engine activation request has been issued, setting an operating point on a predetermined operating line, setting an upper limit value of magnitude of an amount of lowering in engine rotation speed to a first value when a vehicle is in a sport running state and when the previous operating point is within a forced induction range, setting the upper limit value to a second value when the vehicle is not in the sport running state or when the previous operating point is not within the forced induction range, correcting the operating point, and outputting an engine operation state command, a first MG torque command, and a second MG torque command.

Hybrid vehicle and method of controlling hybrid vehicle

An HV-ECU calculates requested output torque Tec based on requested power and compares the requested output torque with controlled upper limit torque Teth. When requested output torque Tec has attained to controlled upper limit torque Teth, the HV-ECU restricts output torque of engine to controlled upper limit torque Teth and calculates actual output torque Ter at that time. Then, the HV-ECU calculates a difference (differential torque &#x394;Te) between controlled upper limit torque Teth and actual output torque Ter. The HV-ECU learns controlled upper limit torque Teth based on differential torque &#x394;Te.

When it is determined that control of warm-up of a catalyst is necessary at the time of start of an engine, an ECU starts warm-up control. Initially, the ECU performs first processing for a first set time period. In the first processing, the ECU sets the engine to an idle state and fully opens a waste gate valve. When the first set time period has elapsed since the first processing was started, the ECU performs second processing. In the second processing, the ECU sets the engine to a prescribed rotation speed and fully closes the waste gate valve. When a second set time period has elapsed since the second processing was started, the ECU quits the second processing and quits warm-up control.

A vehicle includes: a motor generator; an engine having a forced induction device; and a HV-ECU. An operation region of the engine includes a PM generating region in which an amount of particulate matters included in exhaust gas of the engine is more than a predetermined amount due to a load of the engine being abruptly increased during boosting by the forced induction device. The PM generating region is a low-rotation and high-torque region. When assistance by the motor generator is sufficiently obtained and the engine is operated in the PM generating region, the HV-ECU restricts an increasing rate of the torque of the engine to be less than or equal to an upper limit rate. The HV-ECU complements, by the torque of the motor generator, the torque of the engine restricted by restricting the increasing rate of the torque of the engine.

An HV-ECU performs processing including controlling an engine to be in a non-forced induction operation state when an engine has been on and when an engine stop request has been issued, performing processing for stopping the engine when a predetermined first period has elapsed, restricting forced induction and output when the engine stop request has not been issued and when a current time point is immediately after start of the engine, canceling restriction when a predetermined second period has elapsed, and controlling the engine with a position on a higher rotation speed side than a current operating point along an equal power line being set as an operating point when the current time point is not immediately after start of the engine and when a negative pressure is insufficient.

An HV-ECU performs processing including calculating requested system power, calculating requested engine power when an engine activation request has been issued, obtaining a turbo temperature, setting an operating point on a predetermined operating line when the turbo temperature is equal to or lower than a threshold value Ta, setting as the operating point, a position on a higher rotation speed side by a predetermined value along an equal power line when the turbo temperature is higher than the threshold value Ta, carrying out engine control, and carrying out MG control.

A vehicle includes an engine including a forced induction device, a knock sensor and a crank angle sensor that detect an occurrence of LSPI, a battery that supplies electric power to a second motor generator, and an ECU. When an occurrence of the LSPI is detected, the ECU restricts a maximum torque, which can be output by the engine with the forced induction device, more than when an occurrence of the LSPI is not detected to prevent an engine operating point from being included in an LSPI area, and when an output of the engine becomes insufficient along with the restriction on the maximum torque, the engine compensates for an amount of the insufficient output with electric power supplied from the battery.

Hybrid vehicle and method of controlling the same

A vehicle includes an engine including an injector of cylinder injection type and a forced induction device, a second motor generator that generates electric power with an output torque of the engine, and an ECU that controls the engine and the second motor generator. When an amount of intake air and a fuel pressure of the engine decrease in boosting of suctioned air by the forced induction device, the ECU reduces a decrease in the amount of intake air during a period in which an injection amount is equal to a minimum injection amount, and when an excessive torque is generated in the output torque of the engine along with reducing a decrease in the amount of intake air, the ECU absorbs the excessive torque by a power generation operation of the second motor generator.

A hybrid vehicle includes an engine, a first MG, a second MG, a planetary gear mechanism, and an HV-ECU. The engine includes a supercharger and a purge device. The purge device introduces fuel vapor into an intake passage of the engine. Upon request for fuel purge, when an operating point of the engine is included in an area A, the HV-ECU controls the engine and the first MG to move the operating point to outside of the area A.

In a hybrid vehicle, each of an engine and an MGis mechanically coupled to a drive wheel with a planetary gear being interposed. The planetary gear and an MGare configured such that motive power output from the planetary gear and motive power output from the MGare transmitted to the drive wheel as being combined. When a first condition is satisfied during traveling of the vehicle, a controller stops combustion in the engine and performs motoring by the MGsuch that the planetary gear outputs deceleration torque. When a second condition in addition to the first condition is satisfied (YES in S) during deceleration of the hybrid vehicle with deceleration torque, the controller performs motoring with throttle opening being set to first opening or larger and WGV opening being set to second opening or smaller.

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Toyota, Japan

Osamu Maeda