Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Koyo Seiko Company, Ltd.

Masatoshi Ito

Hiroatsu Endo

Hidehiro Oba

Kazumi Hoshiya

Tatsuya Ozeki

Koji Hayashi

Takeshi Kanayama

Taku Harada

Tsuyoshi Mikami

Kazuyuki Shiiba

Koki Ueno

Shunsuke Oyama

Masataka Sugiyama

Taiyo Uejima

Daiki Sato

Masaki Nomura

Takuya Kodama

Tomokazu Nomura

Masaharu Ohba

Shohei Nagata

Kazuaki Kamiya

Sadayoshi Koyari

In a control device of a hybrid vehicle including an engine, a rotating machine, a power transmission device, and an electric oil pump, the control device comprising: a state determining portion; an electric oil pump control portion performing a test operation of the electric oil pump for determining whether the electric oil pump operates normally when it is determined that the measured temperature of the oil allows the electric oil pump to operate normally; and an engine control portion, the electric oil pump control portion performs the test operation of the electric oil pump in a predetermined period after a power supply state of the hybrid vehicle is switched to a power-on state enabling the vehicle to run and before the hybrid vehicle actually starts running, and when the test operation of the electric oil pump is performed in the predetermined period, the engine control portion starts the engine.

Control device of hybrid vehicle

A control device of a hybrid vehicle causing a first electric motor to apply an engine reduction torque for reducing a rotation speed of an engine at the time of stopping a rotation of the engine, when it is determined that an output torque of a second electric motor is in a predetermined torque range near zero including zero during transition to stopping the rotation of the engine with the engine reduction torque applied by a first electric motor at the time of stopping the rotation of the engine being set to a predetermined engine reduction torque, the engine reduction torque is changed from the predetermined engine reduction torque.

A control apparatus for a hybrid vehicle drive system, which permits effective reduction of deterioration of the drivability of the hybrid vehicle. The control apparatus includes a drive mode switching portionconfigured to switch the hybrid vehicle drive system from a hybrid drive mode to a first EV drive mode if an electric energy amount stored in a battery is smaller than a predetermined threshold value &#x3b1; or if a vehicle drive force required to be generated by the hybrid vehicle drive system is smaller than a predetermined threshold value &#x3b2;, and to a second EV drive mode if the electric energy amount stored in the battery is equal to or larger than the threshold value &#x3b1; and if the drive force required to drive the hybrid vehicle is equal to or larger than the threshold value &#x3b2;, when the drive mode switching portion has determined that the hybrid vehicle drive system should be switched from the hybrid drive mode to the first or second EV drive mode.

Control apparatus for a hybrid vehicle drive system

In a hybrid vehicle, a criterion temperature for locking a first electric motor/generator is set to a first temperature when the engine is in a reduced-cylinder operation. The criterion temperature is set to a second temperature that is lower than the first temperature, when the engine is in an all-cylinder operation. If the temperature of the first electric motor/generator is higher than the criterion temperature, the first electric motor/generator is set to a locked state.

Hybrid vehicle and control method therefor

In order to provide a hybrid drive system that suppresses a useless change of a pump driving path and that has a high durability, a plurality of drive sources, an output mechanism that outputs rotational power to an outside on the basis of those operation states, a control device that controls the operation states of the drive sources, an oil pump, and a pump input selecting mechanism that causes the oil pump to be driven with one of a plurality of rotary shafts to which power from the corresponding drive sources is inputable, are included, and the control device controls the rotation speeds (V, V) of the plurality of rotary shafts to unequal speeds by controlling the operation state of one of the plurality of drive sources.

Hybrid drive system

Providing a control device of a hybrid vehicle capable of reducing a rattling noise without changing an engine rotation speed. If the second electric motor torque Tis within the rattling noise occurrence region G, the engine rotation fluctuation suppression control (at least one of the EGR amount suppression control, the self-EGR amount suppression control, the lean-burn control, and the ignition delay control) is provided to suppress the engine rotation fluctuations as compared to during normal running while the second electric motor torque Tis out of the rattling noise occurrence region G and, therefore, the engine rotation fluctuations can be suppressed to reduce the a rattling noise without changing an engine rotation speed N. Thus, the rattling noise can be reduced without giving an uncomfortable feeling to a user due to a change in the engine rotation speed N.

A control device for a vehicle hydraulic control circuit having a hydraulic switch disposed on a hydraulic control circuit of an automatic transmission, includes: a malfunction detecting portion configured to detect a malfunction of the hydraulic switch; and a malfunction removing portion configured to execute an operation for restoring a contact of the hydraulic switch when a malfunction of the hydraulic switch is detected.

Control device for vehicle hydraulic control circuit

Due to the reduction of a discharge amount of a mechanical oil pump by a lowering of the idling rotation speed, a slip in a hydraulic power transmission apparatus and a blow up of an electric motor for running due to a delay of the rising of the oil pressure upon the sudden start and the like are prevented. While avoiding the slip and the blow up, the idling rotation speed is lowered so as to make the engine noise small. When the return determination from the idling state is performed based on the shift operation from P to D, at step S, a torque TMGof a second motor/generator MGis temporarily restricted. As a result, upon the sudden start from the idling state, even when the rising of the oil pressure delays, the second brake Bengaged upon the starting is prevented from slipping, and the second motor/generator MGis prevented from blowing up. As a result, while avoiding the slip of the second brake Band the blow up of the second motor/generator MGdue to the hydraulic response delay, an idling rotation speed N Eidl is lowered so that the engine noise can be reduced.

Drive control device for hybrid vehicle

It is provided a control device for a vehicular power transmitting apparatus provided with a transmission disposed in a power transmitting path between an electric motor and drive wheels, the control device switching a synchronizing control method of the transmission in a kickdown shifting performed in the transmission to either one of a rotation-synchronization control by a hydraulic pressure control of the transmission and a rotation-synchronization control by the electric motor, depending on an input torque applied to the transmission at the beginning of the shifting.

Control device for vehicular power transmitting apparatus

When an engine is in operation an ignition switch is turned off by a driver an ECU executes a program including the step of actuating an electric motor driven oil pump.

Vehicular control device and method

A control device causes a motor-generator to stop while a shift lever is set to a neutral position, and changes the rotation speed of an electric oil pump from a first rotation speed to a second rotation speed lower than the first rotation speed if a state of the electric oil pump in a hydraulic pressure control device enters a state where it is not preferable to continue operation at the first rotation speed. Preferably, the control device warns a driver to change the shift lever position from the neutral-position to another position if the vehicle satisfies a prescribed warning condition. Further preferably, the control device sets the vehicle to a running non-permitted state if the shift lever position is not changed from the neutral position to another position after warning.

Control device of vehicle, vehicle, and method of controlling vehicle

A control system for hybrid vehicles, in which a second prime mover is connected to an output member to which a power is transmitted from a first prime mover through a transmission in which a torque capacity is varied in accordance with an oil pressure, and which has a first hydraulic pump driven by the first prime mover for establishing an oil pressure to be fed to the transmission, and a second hydraulic pump arranged in parallel with the first hydraulic pump and driven by an electric motor. A torque limiter limits an output torque of the second prime mover temporarily to a predetermined torque which is lower than a maximum output torque, at a starting time of the first prime mover.

Control system for hybrid vehicles

A control system for a hybrid vehicle, in which an engine is connected to a first motor generator and to an output shaft through a power distributing mechanism (), in which a second motor generator is connected to the output shaft through a transmission () wherein a torque capacity is varied in accordance with an oil pressure, and which has an electric oil pump (OPM) for generating an oil pressure, comprising: an oil pressure judging means for judging whether or not the oil pressure established by operating OPM is raised higher than a preset value; an electric oil pump output lowering device for lowering an output of OPM in case the oil pressure judging device judges that the oil pressure is raised higher than the preset value; and a cranking device for carrying out a cranking of E/G by the first motor generator.

A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed has exceeded the motor speed.

Growing community of inventors

Okazaki, Japan

Masatoshi Ito