Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Toyoda Iron Works Co., Ltd.

Jms Co., Ltd.

Atsushi Kawamoto

Kiyonori Takagi

Haruhisa Suzuki

Atsushi Tabata

Hidehiko Banshoya

Tatsuya Imamura

Toshiki Kanada

Yuji Yasuda

Tooru Matsubara

Koichi Okuda

Ryuji Ibaraki

Kazuyuki Shiiba

Hiroyuki Tateno

Shigetsugu Iwata

Junji Matsushita

Hiroshi Hata

Isamu Yamasaki

Seitaro Nobuyasu

Kimiyoshi Nagai

Kuniaki Ishii

Shingo Kato

Katsutoshi Shimizu

Marina Hirata

Yuki Katayama

Junya Abe

Kazuaki Kamiya

Fumimori Imaeda

Yu Hirai

Takeshi Horie

Hidehiko Bansyoya

Hideki Matsubo

Yasushi Ueda

Toshiharu Hirai

Naoya Usami

Hidetomo Nakamoto

Eiichi Nishida

A lubrication mechanism for a vehicle drive-force transmitting apparatus including; first and second gears meshing with each other in a meshing region; and a casing storing therein the first and second gears. The lubrication mechanism includes a gutter that extends from an inner wall surface such that oil is received in the gutter and is then dropped from an end of the gutter. The gutter includes a flow-direction changing rib with which the received oil is to be collided whereby a flow direction of the received oil is changed to a direction toward the end of the gutter. The end of the gutter is located on upper side of the meshing region, between first and second vertical planes containing respective first and second axes about which the first and second gears to be rotated, and is located between opposite ends of the meshing region.

Lubrication mechanism for vehicle drive-force transmitting apparatus

A manual unlocking device for a parking lock mechanism includes an operation lever that rotates when the parking lock mechanism is switched from a locked state to an unlocked state. The operation lever is arranged outside an occupant space of a vehicle cabin and is configured that a tool can be coupled to a rotation center thereof from the occupant space. The manual unlocking device for the parking lock mechanism is configured to switch the parking lock mechanism from the locked state to the unlocked state by integral rotation of the operation lever with the tool when the tool, which is coupled to the operation lever, rotates in a state where the tool is arranged on the rotation center of the operation lever.

Manual unlocking device for parking lock mechanism

In a vehicle power transmission device including a case housing a power transmission mechanism and a cover covering a side surface of the case in a vehicle width direction, the cover includes a stepped portion with a vehicle rear-side portion projecting outward in the vehicle width direction in a horizontal cross section, a front-side extending portion extending from the stepped portion to the vehicle front side and a plate-shaped inclined rib disposed at a corner portion between the stepped portion and the front-side extending portion, and inclined toward the front-side extending portion from a leading end portion of the stepped portion to the vehicle front side.

Vehicle power transmission device

A vehicle drive device that includes a case forming a first accommodating space that accommodates a speed change device and a second accommodating space that accommodates a rotary electric machine; an storage that is disposed under the first accommodating space and stores oil; a hydraulic pump including a suction that suctions the oil from the oil storage; a first oil passage that supplies the oil discharged by the hydraulic pump to the speed change device as hydraulic oil; a second oil passage that supplies the oil discharged by the hydraulic pump to the rotary electric machine as cooling oil; and a third oil passage that returns the oil supplied to the rotary electric machine, from the second accommodating space to the oil storage, by allowing the oil to flow in a direction from the second accommodating space toward the first accommodating space.

Vehicle drive device

A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.

Hybrid vehicle

A transmission unit is able to switch between a non-neutral state where power of an engine is transmitted via a path Kand a neutral state where power of the engine is not transmitted via the path K. A clutch is able to switch between an engaged state where power is transmitted from the engine to a first MG and a released state where transmission of power from the engine to the first MG is interrupted. When the transmission unit is controlled to the non-neutral state and, at the same time, the clutch is set to the released state, a vehicle is operable in series-parallel mode. When power is transmitted via the path Kby directly coupling the engine to the first MG by the clutch and the path Kis interrupted by controlling the transmission unit to the neutral state, the vehicle is operable in series mode.

Hybrid vehicle operable in series mode and in series-parallel mode

A power transmission apparatus includes a first electric motor, a power split mechanism, a second electric motor, a case, a support wall, and a breather mechanism. The case accommodates the first electric motor, the power split mechanism, and the second electric motor. The support wall is provided between the power split mechanism and the second electric motor. The breather mechanism is located in a rotational angle range that is at least equal to 90 degrees and is smaller than 180 degrees. The breather mechanism has a through hole and a breather chamber. The breather chamber is provided at a case inner side end of the through hole and is opened in a direction that does not oppose a virtual surface that passes through the rotational axis at a rotational angle of 90 degrees of the second electric motor.

Power transmission apparatus for vehicle

A hybrid vehicle is able to select series-parallel mode by engaging a clutch (C) or a brake (B) and releasing a clutch (CS), and is able to select series mode by releasing both the clutch (C) and the brake (B) and engaging the clutch (CS). The hybrid vehicle includes a simultaneous supply prevention valve () that prevents simultaneous engagement of the clutch (CS) and at least one of the clutch (CI) or the brake (B). When a signal pressure of at least one of hydraulic pressure for engaging the clutch (C) or hydraulic pressure for engaging the brake (B) is input to the simultaneous supply prevention valve (), the simultaneous supply prevention valve () is switched to a state where supply of hydraulic pressure to the clutch (CS) is cut off.

A manual release device for a parking lock mechanism includes an operating lever, a cable and an idle motion mechanism. The idle motion mechanism includes a body portion, a lever provided on the body portion, a helical compression spring, and a contact portion provided on the shaft. The cable is coupled to the lever. A distal end of the lever is arranged below a turning center of the lever. The parking lock mechanism is configured, when the parking lock mechanism is in a locked state, to be switched into an unlocked state as the body portion contacts the contact portion to cause the shaft to turn when the lever is turned against an urging force of the urging member as a result of operation of the operating lever to cause the body portion to turn from the normal position to the actuated position.

Manual release device for parking lock mechanism

A hybrid vehicle includes an electronic control unit configured to, when the drive mode is changed from one of the series-parallel mode and the parallel mode to the other one of the series-parallel mode and the parallel mode and the speed stage is changed from one of the low speed stage and the high speed stage to the other one of the low speed stage and the high speed stage, selectively execute either one of a first control and a second control. The first control is control in which the drive mode and the speed stage are changed by passing through the series mode. The second control is control in which one of the drive mode and the speed stage is changed and then the other one of the drive mode and the speed stage is changed without passing through the series mode.

A hybrid vehicle includes an engine (), a first motor generator (MG), a second motor generator (MG), a transmission unit (power transmission unit) (), a differential unit (), a clutch (CS) and a mechanical oil pump (). The hybrid vehicle is able to switch between series-parallel mode in which power of the engine is transmitted via the transmission unit and the differential unit and series mode in which power of the engine is transmitted via the clutch. The differential unit () is a planetary gear mechanism including a sun gear (S) connected to the first motor generator (MG), a ring gear (R) connected to the second motor generator (MG), and a carrier (CA) connected to a ring gear (R) that is an output element of the transmission unit (). The mechanical oil pump () is driven by power that is transmitted from the carrier (CA) of the differential unit.

A control device performs a control process such that when there is a request in a series/parallel mode to switch the current mode to a parallel mode, and the current speed ratio also has a value faster than a Lo rotation synchronization speed ratio, the control device performs the step of switching the running mode to the parallel mode via a series mode with asynchronous switching, whereas when the current speed ratio has a value slower than the Lo rotation synchronization speed ratio, the control device performs the step of switching the running mode to the parallel mode via the series mode with synchronous switching.

A composite gear member of the power transmission device is divided into an annular first member and a second member. The annular first member is formed with an output gear. The second member is formed with internal teeth and spline-coupled to an inner portion of the first member. Therefore, the influence of the engagement reaction force generated from the output gear of the first member is decreased by the spline-coupling, and the vibration is reduced.

Power transmission device

When it is predicted that a request for a parking lock operation is likely to be received, an actuator of a parking mechanism is controlled to perform standby processing for bringing the parking mechanism into a standby state immediately preceding a lock state to wait for the request for the parking lock operation.

Growing community of inventors

Toyota, Japan

Atsushi Kawamoto