Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Yu Shimizu

Takashi Ando

Masaya Amano

Takeshi Kishimoto

Toru Ando

Yamato Niwa

Toshihiko Minamii

Daisuke Kamikihara

Fumiyoshi Kuribara

Daiki Takayama

Akira Umemoto

Yuki Hayakawa

Takuya Itoh

Tomoyuki Shibata

Ippei Takesue

Tomohiro Narematsu

Wataru Nagashima

Mitsuhiro Matsumura

Tomoya Aoki

Yasuyuki Morishita

Toshiki Miyazaki

A vehicle configured such that an on-board battery is chargeable by receiving electric power from a power supply outside the vehicle includes an inlet, a voltage sensor that detects an input voltage that is a voltage input from the power supply to the inlet, and a control device configured to execute a detection process when connected to the inlet. The detection process includes a first process that suspends charging when a difference between the input voltage before a start of the charging and the input voltage after the start of the charging is equal to or larger than a threshold value, and a second process that stops the charging when a difference between the input voltage during suspension of the charging in the first process and the input voltage after resumption of the charging is equal to or larger than the threshold value.

Detecting an impedance abnormality in a charging path

A relay drive control device is configured to control drive of a relay for connecting a battery mounted on a vehicle and an external power supply. The relay drive control device includes a controller configured to, when driving the relay, supply an output voltage of the battery to the relay after increasing the output voltage to a voltage value at which the relay is drivable.

Relay drive control device, control method, and storage medium

There is provided a hybrid vehicle comprising an engine; a first motor configured to generate a reverse voltage by rotation; a planetary gear mechanism configured such that three rotational elements are respectively connected with a driveshaft coupled with an axle, with the engine, and with the first motor; a second motor configured to input and output power from and to the driveshaft; a first inverter configured to drive the first motor; a second inverter configured to drive the second motor; a power storage device; and a converter placed between the power storage device and the first inverter along with the second inverter. In an evacuation travel with an accelerator-on operation during an inverter failure, the hybrid vehicle shuts off gates of the first inverter and the second inverter, controls a rotation speed of the engine such as to rotate the first motor at a predetermined rotation speed, and controls a voltage of a second power line such as to maximize an inter-line current that flows from the second power line to a first power line via the converter.

Hybrid vehicle

When a shift position is changed from a non-forward operating position to a forward operating position during a predetermined operation that shuts off gates of a first inverter and a second inverter and operates an engine, a step-up/down converter is controlled to gradually change the voltage of a high voltage-side power line toward a required voltage that is lower than a reverse voltage of a first motor.

An electronic control unit of a hybrid vehicle controls an engine and an inverter to execute inverterless traveling. The inverterless traveling is a traveling state where the inverter is set to a gate blocking state, and where a reaction force of a torque that is output by a rotating electric device when the rotating electric device to be rotated by output of the engine generates electric power is applied to an output shaft. The electronic control unit controls a converter to adjust a voltage of an electric power line to a predetermined maximum voltage or a voltage within a predetermined range from the maximum voltage when a shift range of the hybrid vehicle is switched to a non-forward range from a forward range during the inverterless traveling.

Hybrid vehicle and method of controlling the same

A hybrid vehicle may include an engine, a first rotating electric machine, an output shaft, a planetary gear mechanism, a second rotating electric machine, a battery, an inverter and an electronic control unit. The electronic control unit may be programmed to perform inverterless traveling control. The inverterless traveling control may be control for causing the hybrid vehicle to travel by placing the inverter in a gate cut-off state, and driving the engine. The electronic control unit also may be programmed to interrupt current flowing between the first rotating electric machine and the battery when a shift range other than a forward range is selected, during the inverterless traveling control.

During a predetermined drive in which a hybrid vehicle is driven with shutting off gates of a first inverter and a second inverter and operating an engine, the hybrid vehicle controls the engine and a step-up/down converter, such that a reverse voltage of a first motor is higher than a voltage of a high voltage-side power line. In the event of an increase in an operation amount of an accelerator during the predetermined drive, the hybrid vehicle controls the engine and the step-up/down converter to limit an increment of a difference between the reverse voltage of the first motor and the voltage of the high voltage-side power line when a temperature of the step-up/down converter is equal to or higher than a predetermined temperature, compared with an increment of the difference when the temperature of the step-up/down converter is lower than the predetermined temperature.

During a predetermined drive in which the hybrid vehicle is driven with operation of the engine in such a state that the first inverter and the second inverter are shut down, the hybrid vehicle controls the engine and the step-up/down converter such that the hybrid vehicle is driven with output of a torque from a first motor to a driveshaft via a planetary gear by decreasing the voltage of the high voltage-side power line to be lower than a reverse voltage of the first motor in the range of not lower than a lower limit control voltage that is higher than an allowable lower limit voltage. The hybrid vehicle increases the lower limit control voltage during the predetermined drive, compared with the lower limit control voltage during a drive other than the predetermined drive.

A vehicle includes an engine, an MG (motor generator), an MG, a planetary gear device mechanically coupled to the engine and MGand MG, a battery, a converter configured to boost a voltage from the battery, an inverter configured to perform a power conversion between the converter and MGor between the converter and MG, and a controller. MGgenerates a counter-electromotive voltage when rotated by the engine, and a braking torque is generated as the counter-electromotive voltage becomes greater than the output voltage of the converter. During an inverter-less running control where the inverter is put into a gate shut-off state and the engine is driven to cause MGto generate the counter-electromotive torque, the controller decreases a voltage difference between the counter-electromotive voltage and the output voltage of the converter when a chargeable power of the battery is lower than a predetermined value.

In a hybrid vehicle including an engine; a first motor configured to generate reverse voltage by rotation; a planetary gear mechanism configured to have three rotational elements connected with a drive shaft coupled with an axle, the engine and the first motor; a second motor configured to input and output power from and to the driveshaft; first and second inverters configured to drive the first and second motors respectively; and an electric storage device, a first control controlling a rotational speed of the engine such that a first electric current to flow through the electric storage device is maximized in a state of gate interruption of the first and second inverters is executed at the time of an evacuation travelling being performed when an ON operation of an accelerator is performed during an inverter failure in which the first and second inverters cannot be normally actuated.

An electronic control unit is configured to control an engine such that in specified traveling where the vehicle travels while operating the engine with a first inverter and a second inverter kept in a shutdown state, a first motor is rotated at a speed that causes a counter-electromotive voltage of the first motor to be higher than direct current-side voltages of the first inverter and the second inverter, and the first motor outputs torque to a driving shaft through a planetary gear. The electronic control units are configured to interrupt electric power supply from the side of the first inverter and the second inverter to the side of an electric storage device when an accelerator operating amount becomes equal to or below a specified operating amount in the specified traveling.

Hybrid vehicle and control method for hybrid vehicle

A vehicle includes an engine, an MG (motor generator) an MG, a planetary gear device mechanically coupled to the engine and MGand MG, a battery, an inverter configured to perform a power conversion between the battery and MGand between the battery and MG, and a controller. MGgenerates a counter-electromotive torque when rotated by the engine. During an inverter-less running control where the inverter is put into a gate shut-off state and the engine is driven to cause MGto generate the counter-electromotive torque, the controller decreases a engine target rotation speed Netag when an integrated value of battery charging current (deterioration evaluation value D) is greater than a predetermined value (threshold value D) smaller than the engine target rotation speed Netag when the deterioration evaluation value D is equal to or smaller than the threshold value D

Inverterless running control is control in which an inverter is set to a gate cut-off state, an engine is driven to mechanically rotate a motor-generator and to generate in the motor-generator, counter-electromotive torque in accordance with a difference between a counter-electromotive voltage of the motor-generator and a system voltage, and a vehicle runs with drive torque applied to an output shaft as reaction force of the counter-electromotive torque. An ECU controls drive torque to produce driving force determined by an accelerator position by raising or lowering the system voltage during inverterless running control.

Hybrid vehicle and method for controlling the same

When at least one of motor generators is not under normal control and where the MGtemperature is less than an upper limit value, an ECU is configured to perform an inverter-less running control. In the inverter-less running control, an inverter is brought into a gate shutoff state and an engine is driven to cause the motor generator to generate a counter-electromotive voltage which consequently produces a counter-electromotive torque. During the inverter-less running control, the ECU makes a voltage difference between the counter-electromotive voltage and the voltage of a power line connecting a converter and an inverter when the MGtemperature is equal to or greater than a predetermined value smaller than the voltage difference when the MGtemperature is less than the predetermined value.

An ECU performs control processing including setting an inverter to a gate blocking state when an abnormal condition of the inverter occurs, activating a converter, driving an engine, carrying out first suppression control when an abnormal condition of a resolver occurs and when an MGrotation speed immediately before occurrence of the abnormal condition is equal to or smaller than a first speed threshold value, and carrying out second suppression control when the MGrotation speed immediately before occurrence of the abnormal condition is greater than the first speed threshold value and when there is no record of stop.

Growing community of inventors

Nagakute, Japan

Yu Shimizu