Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Takashi Ando

Yu Shimizu

Masaya Amano

Takeshi Kishimoto

Yuki Hayakawa

Shinichiro Minegishi

Satoshi Nohira

Haruhiko Matsushita

Tomoyuki Shibata

Wataru Nagashima

Mitsuhiro Matsumura

Shinya Nishihata

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

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 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

When there is an abnormality in communications between a motor ECU and an HVECU in an automobile, the motor ECU controls a motor such that creep torque or a given torque larger than the creep torque is delivered from the motor. Thus, when there is an abnormality in communications between the HVECU and the motor ECU, the automobile is able to run in a limp home mode.

Automobile including motor for running the automobile

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.

Hybrid vehicle and method of controlling hybrid vehicle

When a malfunction occurs in communication between an HV-ECU and an MG-ECU, inverterless running is performed to ensure that a driving torque of a vehicle is applied, by setting inverters in a gate shutoff state and using a braking torque generated in a motor generator rotated by an engine. When the inverterless running resulting from the malfunction in communication is performed, the MG-ECU uses a converter to control a system voltage VH to a predetermined voltage. During the inverterless running resulting from the malfunction in communication, the HV-ECU sets an assumed power range of a battery based on a detected value regarding a vehicle running state and the predetermined voltage. When an actual electric power determined from the voltage and current of the battery is out of the assumed power range, the HV-ECU performs a process for stopping the vehicle from running.

A hybrid vehicle includes: an engine; a first motor; a planetary gear having three rotary elements that are connected respectively to a rotary shaft of the first motor, an output shaft of the engine, and a drive shaft coupled to an axle such that on a collinear diagram, the rotary shaft, the output shaft, and the drive shaft are arranged in that order; a second motor; a first inverter configured to drive the first motor; a second inverter configured to drive the second motor; a battery capable of exchanging power with the first and second motors via the first and second inverters; and an electronic control unit configured to control the engine such that a rotation speed of the engine increases at a predetermined time when the engine is operative, respective gates of the first and second inverters are both blocked, and an accelerator is ON.

Work W to which oil has adhered is heated in the heating furnace 28 and adhering oil is evaporated. Gas containing the evaporated oil component is burned in the combustor 35. A portion of the generated combustion gas is circulated into the heating furnace 28 through the circulating duct 38, and an amount of the circulating combustion gas is controlled in accordance with a temperature in the heating furnace 28. Processing of aluminum materials is carried out using a base oil of hydrocarbon, the maximum molecular weight M of which is not less than 282 and not more than 378, and an additive of not less than 3% by weight of alcohol or carboxylic acid, the maximum molecular weight M of which is not more than 378.

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Nisshin, Japan

Takashi Ando