Toyota Jidosha Kabushiki Kaisha

Hideki Kamatani

Ryoji Sato

Suguru Kumazawa

Koichiro Muta

Koji Hokoi

Teruo Ishishita

Hiroyuki Obata

Takao Itoh

Masaki Okamura

Takashi Amano

Hiroki Endo

Takaya Soma

Kazuhiro Sato

Kazuma Aoki

Takeshi Kotani

Takahiro Nakano

Ryo Mano

Kenta Watanabe

Tatsuya Ito

Etsushi Taguchi

Masahiro Kagami

Sawa Higuchi

Hideaki Ishihara

Makoto Yamasaki

Yusuke Tsuzuki

A vehicle moving apparatus executes a moving control to autonomously move a vehicle by controlling power output from an internal combustion engine and an electric motor. The moving control maintains an index value expressing a moving state within a predetermined range and decelerates the vehicle by causing the vehicle to coast. The apparatus uses a second start determination value that is smaller than a first start determination value when the moving control is executed, and limits power output from the internal combustion engine until exhaust gas recirculation control starts, which allows the power to move the vehicle to be output at high energy efficiency during autonomous moving control.

Vehicle moving apparatus with engine start determination values and engine power limitation for moving control

A displaying control apparatus displays an image which represents a predetermined speed range by a displaying device of an own vehicle while executing a moving speed control, or displays an image which represents a predetermined distance range by the displaying device while executing an inter-vehicle distance control. While executing the moving speed control, the displaying control apparatus display the image representing the predetermined speed range such that the own vehicle or an image representing the own vehicle is displayed within the image representing the predetermined speed range. While executing the inter-vehicle distance control, the displaying control apparatus displays the image representing the predetermined distance range such that the own vehicle or the image representing the own vehicle is displayed within the image representing the predetermined distance range.

Displaying control apparatus

A vehicle driving assistance apparatus predicts (i) a first consumed energy amount corresponding to a consumed energy amount consumed by a driving apparatus of an own vehicle when executing a first following control and (ii) a second consumed energy amount corresponding to the consumed energy amount consumed by the driving apparatus of the own vehicle when executing the second following control. The apparatus executes the second following control when the second consumed energy amount is smaller than the first consumed energy amount. On the other hand, the apparatus executes the first following control when the second consumed energy amount is equal to or greater than the first consumed energy amount.

Vehicle driving assistance apparatus, vehicle driving assistance method, and computer-readable storage medium storing vehicle driving assistance program

While an ordinary moving assist control is executed, a vehicle driving assist apparatus stops the ordinary moving assist control and execute an ordinary moving control to accelerate an own vehicle, based on an accelerator pedal operation amount when an accelerator override state is produced due to an operation of an accelerator pedal of the own vehicle. While an economy moving assist control is executed, the vehicle driving assist apparatus accelerates the own vehicle by an optimum acceleration control when an acceleration request condition that the accelerator override state is produced, is satisfied.

Vehicle driving assist apparatus, vehicle driving assist method, vehicle driving assist program, and vehicle comprising vehicle driving assist apparatus

A vehicle driving assistance system performs traveling assistance control under which an own vehicle automatically travels with. The traveling assistance control includes first constant-speed control for automatically controlling the acceleration of the own vehicle, based on a first vehicle-speed range including a set vehicle speed, such that the vehicle speed of the own vehicle is kept equal to the set vehicle speed, and second constant-speed control for automatically controlling the acceleration of the own vehicle, based on a second vehicle-speed range including the set vehicle speed, such that the vehicle speed of the own vehicle is kept equal to the set vehicle speed. The second vehicle-speed range is set to a wider range than the first vehicle-speed range. The vehicle driving assistance system switches the traveling assistance control between the first constant-speed control and the second constant-speed control, according to the traveling state of the own vehicle.

Vehicle driving assistance system

During a hybrid drive, a hybrid vehicle sets an engine required power based on a driving required power and controls an engine to output the engine required power, while controlling a motor to drive the hybrid vehicle with the driving required power. When a catalyst temperature of an exhaust emission control device is equal to or lower than a predetermined temperature that requires warming up, in the state that an output upper limit power which a power storage device is allowed to output is equal to or larger than a predetermined power, the hybrid vehicle sets a power calculated by subtracting the output upper limit power from the driving required power, to the engine required power. In the state that the output upper limit power is smaller than the predetermined power, the hybrid vehicle sets the driving required power to the engine required power.

Hybrid vehicle catalyst warm up

When the state of charge of a power storage device is equal to or higher than a predetermined ratio in a specific acceleration time where an acceleration request is equal to or greater than a predetermined level, a hybrid vehicle controls an engine such that the rotation speed of the engine is not increased in a range of an output limit of the power storage device and that the engine is operated at an operation point on a fuel consumption priority operation line. When the state of charge of the power storage device is lower than the predetermined ratio in the specific acceleration time, the hybrid vehicle controls the engine such that the rotation speed of the engine is not increased in the range of the output limit of the power storage device and that the engine is operated at an operation point on a power priority operation line.

Hybrid vehicle

When a temperature of a catalyst in an exhaust emission control device mounted in an exhaust system of an engine is equal to or higher than a predetermined temperature at a time of a request for stopping the engine, a hybrid vehicle including the engine and a motor continues fuel injection of the engine until satisfaction of a predetermined condition and stops fuel injection of the engine on satisfaction of the predetermined condition. When the temperature of the catalyst is lower than the predetermined temperature at the time of the request for stopping the engine, on the other hand, the hybrid vehicle immediately stops fuel injection of the engine.

A hybrid vehicle comprises an engine configured to output power for driving and equipped with an exhaust emission control device in an exhaust system thereof. The hybrid vehicle further comprises a control device. In response to a predetermined rotation request for rotating the engine with no need to output power from the engine, the control device performs a control to rotate the engine with fuel injection when a catalyst temperature in the exhaust emission control device is equal to or higher than a predetermined temperature, while performing a control to rotate the engine without the fuel injection when the catalyst temperature is lower than the predetermined temperature.

A power supply apparatus of a vehicle includes: auxiliary machines electrically connected between a battery and a converter; and a control device controlling inverters and the like based on a required vehicle power including a required charge discharge amount of the battery. The control device has a continuous voltage step-up mode and an intermittent voltage step-up mode. In the continuous voltage step-up mode, the control device calculates the required charge discharge amount based on electric power supplied from the battery. In the intermittent voltage step-up mode, the control device changes a method of calculating the required charge discharge amount to a method that calculates the required charge discharge amount based on electric power passing through the converter, and makes the required charge discharge amount smaller than the required charge discharge amount in the continuous voltage step-up mode.

Power supply apparatus of vehicle

A vehicle includes an electric power storage device, an electric motor, and an electronic control unit. The electronic control unit is configured to control charging and discharging of the electric power storage device such that a state of charge becomes a target state of charge, to determine whether or not a degree of deterioration of the electric power storage device due to unevenness in salt concentration is equal to or larger than a predetermined degree, when the degree of deterioration is equal to or larger than the predetermined degree and the state of charge is equal to or less than a predetermined requested state of charge, to set the target state of charge such that the target state of charge increases monotonically, and to set an increase amount or an increase rate of the monotonic increase to be larger as the degree of deterioration is larger.

Vehicle

Provided are a power supply device for a vehicle provided with a battery, a converter, and a controller, and a method for controlling the same. The controller controls the converter in a continuous boost mode in which the converter is continuously operated and an intermittent boost mode in which the converter is intermittently operated. The controller does not control the converter in the intermittent boost mode when a control that adjusts a reference point of a resolver of a motor generator is underway.

Power supply device for vehicle and method for controlling the same

A power supply apparatus of a vehicle includes: an engine and a first MG; a battery; a converter stepping up a voltage of the battery and supplying the stepped-up voltage to an inverter of the vehicle; and a control device controlling the converter in a continuous voltage step-up mode in which the converter is continuously operated and an intermittent voltage step-up mode in which the converter is intermittently operated. The control device estimates an SOC of the battery based on battery current IB flowing into and out of the battery, and forces the battery to be charged by the engine and the first MG when an estimate value of the SOC is lower than a predetermined lower limit. The control device suppresses an operation of the converter in the intermittent voltage step-up mode to a greater extent as the estimate value of the SOC is closer to the lower limit.

When a catalyst temperature is lower than a predetermined temperature on a second or subsequent start of an engine since system activation of a vehicle, a catalyst warm-up request is output for the purpose of warming up a catalyst in a catalytic converter. An output limit Wout of a battery is not increased in response to a second or subsequent output of the catalyst warm-up request, while being increased in response to a first output of the catalyst warm-up request. Accordingly, the catalyst warm-up in response to the second or subsequent output of the catalyst warm-up request since the system activation suppresses excessive output of electric power from the battery and thereby suppresses deterioration of the battery. Catalyst warm-up is performed in response to the second or subsequent output of the catalyst warm-up request. This suppresses deterioration of emission. As a result, this configuration satisfies both (balances) suppression of deterioration of the battery and suppression of deterioration of emission.

An electric vehicle includes: a vehicle drive apparatus configured to receive electricity to generate vehicle drive power and to generate electricity; a secondary battery that selectively receives and outputs electricity from/to the vehicle drive apparatus; a current sensor that selectively detects (a) an electric current to be input into the secondary battery and (b) an electric current output from the secondary battery; and an electronic control unit configured to control charging and discharging of the secondary battery, and configured to calculate, using a detected value from the current sensor, an evaluation value indicating a degree of deterioration of the secondary battery due to non-uniformity in salt concentration in the secondary battery caused by charging and discharging of the secondary battery. The electronic control unit is configured to execute a capacity-raising control in which a remaining capacity of the secondary battery is raised when the evaluation value reaches a prescribed threshold.

Growing community of inventors

Nagoya, Japan

Hideki Kamatani