Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Denso Corporation

Kiyoshiro Ueoka

Katsuhiko Yamaguchi

Takahiro Nishigaki

Osamu Harada

Mamoru Tomatsuri

Yukio Kobayashi

Yoichi Tajima

Masaya Yamamoto

Kazuomi Okasaka

Kensuke Kamichi

Takeshi Aoki

Koichiro Muta

Noriaki Ikemoto

Makoto Yamazaki

Akihiro Kimura

Kazuhiro Ichimoto

Yasuhiro Kaya

Toshiya Hashimoto

Shunsuke Oyama

Koji Yamamoto

Masaki Nomura

Yusuke Kamijo

Atsushi Takara

Yu Nakao

Kenji Oonishi

Hiroki Tsutsumi

Norihiro Iwase

When an EV cancellation switch is turned on while a control mode is a CD mode and a traveling mode is an EV traveling mode, when a catalyst temperature is lower than a threshold and when a vehicle speed is lower than a threshold, a controller executes control processing including a step of executing first VVT control, a step of, when the catalyst temperature is higher than or equal to the threshold or when the vehicle speed is higher than or equal to the threshold, executing second VVT control and a step of switching the control mode into a CS mode.

Hybrid vehicle

When the driver steps on an accelerator peal to a certain depth and practically keeps the accelerator pedal at the certain depth to maintain a substantially constant accelerator opening, a target additional torque, a maximum reflection rate, and an increment of a reflection rate are set based on the accelerator opening and a vehicle speed. The reflection rate is gradually increased by the increment to the maximum reflection rate after elapse of a preset time period since a start of decreasing a base torque demand affected by the accelerator opening and the vehicle speed. An object torque demand is computed as the sum of the base torque demand and an additional torque, which is given as the product of the target additional torque and the gradually increasing reflection rate. The operations of an engine and two motors are then controlled with the setting of the object torque demand.

Vehicle and control method thereof

An ECU executes a program including the steps of: setting a creep torque reflection ratio; if brake is applied and the vehicle is currently stopped, updating the creep torque reflection ratio to 0; if brake is not applied and despite that the brake fluid's pressure is larger than a hydraulic pressure value, determining that brake hold control is currently exerted, and reducing the creep torque reflection ratio, as based on a map having the brake fluid's pressure as a parameter, to update the creep torque reflection ratio.

Vehicular control device, method of controlling a vehicle, and a storage medium having stored therein a program that implements the method

On condition that output of a torque of not lower than a preset reference torque from a motor continues for at least a predetermined time period in a vehicle stop state with output of a corresponding torque from the a second motor based on a detected accelerator opening, a torque command of the second motor is set to decrease the output torque of said motor by a torque decrease rate, which is set according to the corresponding torque and the accelerator opening in the vehicle stop state (initial accelerator opening). After a changeover of a current crowding phase in the second motor, the torque command of said motor is set to increase the output torque of said motor by a torque increase rate, which is set according to the accelerator opening in the vehicle stop state.

Vehicle and driving system for vehicle installation

When the change speed is instructed, without changing value of a suppressing vibration flag set to value 1 as initial value, a fast fill as the preparation of a brake to be engaged when the change speed is executed and low pressure standby of hydraulic pressure to set the brake in a half-engaged state. Then the suppressing vibration flag is set to value 0 when a predetermined time passed since the change speed is instructed, a sum of a drive torque required for driving and a suppressing vibration torque, which is in the same direction as suppressing rotational fluctuation of a drive shaft, is output from a motor when the suppressing vibration flag is set to value 1.

Vehicle driving apparatus, and control methods thereof

An ECU executes a program including the steps of: if brake hold control is currently exerted , setting at zero a controlled value of a degree of operation of an accelerator pedal used as a controlled value of a degree of a request made by a driver for acceleration, to control a force output to drive the vehicle; if an actual value of the degree of operation of the accelerator pedal serving as an actual value of the degree of the request made by the driver for acceleration is larger than a predetermined degree, determining that there is a request from the driver for acceleration; outputting a command to cancel the brake hold control; and converging the controlled value of the degree of operation of the accelerator pedal to the actual value of the degree of operation of the accelerator pedal.

Vehicular control device, method of controlling a vehicle, and storage medium having stored therein a program that implements the method

In response to a driver's braking request operation, for example, the driver's depression of a brake pedal, a hybrid vehiclesets a fraction of a regenerative braking torque by a motor MGand a fraction of a braking torque by a brake unitrelative to a preset braking torque demand Tr* according to the setting of a speed change ratio in a transmission(steps S, S, S, S, S, and S). The hybrid vehiclecontrols the motor MGto output the regenerative braking torque based on the preset braking torque demand Tr* and the set fraction of the regenerative braking torque, while controlling the brake unitto enable the braking torque based on the preset braking force demand Tr* and the regenerative braking torque by the motor MGto be applied in a distributive manner at a preset front-rear braking torque distribution ratio 'd' to front wheelsandand to rear wheelsand

Vehicle and control method thereof, power output apparatus and control method thereof, and driving system and control method thereof

An ECU releases brake hold control when an actual accelerator pedal position A exceeds a predetermined position A() while the brake hold control is being executed. Further, the ECU determines whether or not the actual accelerator pedal position A is larger than a position A(), which is a value smaller than the predetermined position A(), and if it is larger than the predetermined position A(), executes a process for increasing a creep torque reflection ratio R to recover creep force that has been stopped.

Vehicle controller and control method

In a vehicle, it is determined whether a driver has requested increased driving force based on an accelerator opening degree. If the driver has requested increased driving force, a vehicle speed at the time of the request for increased driving force is derived. Three-dimensional map which corresponds to different vehicle speed and which shows a predetermined relationship of the accelerator opening degree (Acc), the vehicle speed and a required torque are then used to set the required torque. The maps are set such that the required torque increases with respect to the accelerator opening degree when the vehicle speed is low. Further, the maps are set such that when the vehicle speed is high, (i) even if the accelerator opening degree changes a little, the required driving force does not change a large amount, and (ii) the required driving force remains substantially constant when the vehicle speed is in a high speed region. By adopting this configuration, the driver's request is closely correlated with the vehicle speed at the time of the request for increased driving force, and thus the vehicle can be driven with a driving force that accords with the driver's request.

Power output device, control method for the same, and vehicle equipped therewith

During a standstill, a prescribed rotation speed N, which is lower than a prescribed rotation speed Nused during a travel at a low vehicle speed, is set as a minimum rotation speed Nemin (S), and when a demand for an idle operation has been made (S), the minimum rotation speed Nemin is set as a target rotation speed Ne* and the value 0 is set as a target torque Te* (S), whereby an engine is controlled. As a result of this, it is possible to improve the fuel consumption of a vehicle when the engine is operated at idle at standstill compared to a case where the engine is operated at idle at the minimum rotation speed Nemin for which the prescribed rotation speed Nis set regardless of whether or not the vehicle is at a standstill.

Vehicle, driving apparatus and control method of both

In a hybrid vehicle according to the invention, upon satisfaction of a predetermined condition with regard to a gearshift position or a drive mode, a virtual gearshift position according to a driving condition is set to a tentative target gearshift position SPtmp (steps Sand S). An object gearshift position SP* is set based on the tentative target gearshift position SPtmp and a boundary value Srt to have a gentle change with a variation of smaller than 1 (step S). A torque demand Tr* and a target rotation speed Ne* of an engine corresponding to the object gearshift position SP* are then set based on tentative torque demands Tra and Trb and tentative rotation speeds Nea and Neb in correlation to virtual gearshift positions immediately below and immediately above the object gearshift position SP* (steps Sto S)

Hybrid vehicle and control method thereof

In a drive system, where power from a motor is transmitted to a drive shaft and a transmission ratio is changed by a transmission, if the absolute value of the difference between the reference torque Tmr, which is the drive shaft side torque Tmr at the onset of a change in the shift speed of the transmission, and the driving shaft side torque Tmr during the change is less than the threshold value &#x3b1; until the end of the change (S), the application state of a brake in the transmission during the change and the state of the hydraulic pressure supplied to the brake are learned (S). During the change, and actuator of the transmission is controlled using those learned results. Accordingly, any deviations that may have occurred due to changes over time in the transmission, etc. are corrected and the shift speed of the transmission is changed more appropriately.

Drive system, power output system incorporating the drive system, a vehicle equipped with the power output system, and control method for a drive system

In the presence of a torque change request (step S) for changing a torque Tmof one motor MGto enable a smooth gearshift of a transmission interposed between a motor and a driveshaft, when the change of the torque Tmis unattainable within the range of an input limit Win and an output limit Wout of a battery (step S), the power output apparatus of the invention resets a torque command Tm* of the other motor MGto be within the input limit Win and the output limit Wout of the battery (steps Sand S). The power output apparatus also resets an engine power demand Pe* to make a rotation speed Ne of an engine approximately equal to a target rotation speed Ne* (steps Sand S). This arrangement ensures a smooth gearshift of the transmission.

Power output apparatus

A control method of a vehicle includes a step of running the vehicle in an EV running mode in accordance with an operation of a driver, a step of performing a warming-up running, when it is determined that warming up is required, and a step of prohibiting the EV running mode such that the warming up running can be performed.

Control apparatus and control method of vehicle

A delay time for delaying starting of an internal combustion engine in a hybrid vehicle is set to a predetermined time based on an engine coolant temperature and a state of an air conditioner switch. Starting of the engine is delayed for the predetermined time if it is determined that a vehicle can run using only a motor based on a required torque, a required power and an SOC of the battery. The predetermined time is determined based on a time necessary for completing preheating of an engine by a preheating device, preparations of sensors such as an air-furl ratio sensor, and warming-up of an exhaust gas purifying device. As a result, it is possible to efficiently perform start of the engine and operation immediately after the engine start, and to make control at the engine start time simple.

Growing community of inventors

Nisshin, Japan

Kiyoshiro Ueoka