Nissan Motor Company Limited

New H Powertrain Holding, S.l.u.

Takeshi Hirata

Tsuyoshi Yamanaka

Hiroshi Abe

Munetoshi Ueno

Takanobu Sawada

Hiroshi Kaneko

Yusuke Nakane

Kaori Tanishima

Takeshi Ohno

Yuji Nakada

Toshio Honda

A method for controlling a hybrid vehicle executes control in which a state of charge of the battery at a time point at which the hybrid vehicle reaches a destination is lower than an upper limit state of charge by executing an EV mode until the hybrid vehicle reaches the destination. During execution of the control, if an estimated value of a lowest temperature of an engine coolant until the hybrid vehicle reaches the destination is equal to or higher than a first threshold value, the EV mode is started when the EV mode is continuable to the destination, and if the estimated value of the lowest temperature is lower than the first threshold value, a section for executing the EV mode is shortened compared to when the estimated value of the lowest temperature is equal to or higher than the first threshold value.

Method for controlling hybrid vehicle and device for controlling hybrid vehicle

A vehicle control method for controlling a vehicle in which a sailing control for traveling under inertia is executed when a vehicle is traveling. Each time the sailing control is executed, a history of sailing control is stored as history information classified according to situations in which sailing control was canceled. Also, a current travel situation is specified, history information corresponding to a current travel situation is specified from the stored history information, and whether to allow or disallow sailing control is determined based on the specified history information.

Vehicle control method and control device

A vehicle control method for executing a sailing stop control when a drive source stop condition is established while a vehicle is traveling. The sailing stop control stops a drive source of the vehicle and releases an engaging element provided between the drive source and a drive wheel such that the vehicle travels under inertia. The vehicle control method acquires information on a road on which the vehicle will travel, and then determines whether there is a section on a route where the sailing stop control can be executed based on the information. Upon determining a section exist capable of the sailing stop control, the vehicle control method estimates a power shortage amount, which is a shortage amount of power during sailing stop control, based on the information, and charges a battery with power required to cover the power shortage amount prior to starting the sailing stop control.

A regenerative braking control device for a vehicle includes: a driver request braking torque computation unit configured to compute a driver request braking torque based on brake pedaling of a driver; and a regenerative braking torque computation unit configured to compute a regenerative braking torque by restricting a response time of the regenerative braking torque to match a braking rate of a frictional brake based on a vehicle speed and the computed driver request braking torque, and compute the regenerative braking torque by releasing restriction on the response time of the regenerative braking torque in a case where the driver request braking torque decreases.

Regenerative braking control device for vehicle

A vehicle control system of the electrically driven vehicle, wherein the engagement element slip process is carried out for the slipping of the transmission engagement element on the basis of the detection by the detecting section; and the control system has a clutch torque control section that is programmed to work as follows: during the engagement element slip process, the target motor/generator torque, which is increased from the drive torque of the motor/generator by a clutch slip accelerating torque portion for accelerating the slipping of the drive transmission engagement element for the drive torque of the motor/generator, is output from the motor/generator. In addition, when the preset slip accelerating torque suppression condition is met, the torque control for decreasing the drive torque of the motor/generator is carried out.

Vehicle control system for electrically driven vehicle

A hybrid vehicle includes an engine, a motor, the engine and the motor being driving sources, a first traveling mode in which the vehicle is driven utilizing an output of the engine, and a second traveling mode in which the vehicle is driven through an output of the motor with the engine stopped. The hybrid vehicle further includes an air density detecting section configured to detect an air density of an environment under which the vehicle travels and, in a case where the detected air density is reduced with respect to a standard air density, the motor output in the second traveling mode is reduced with respect to the motor output in a standard air density such that a driving force of the vehicle in the second traveling mode when the traveling mode is switched approaches the driving force of the vehicle in the first traveling mode.

Hybrid vehicle

Disclosed herein are embodiments of a drive control apparatus for hybrid vehicles and methods of driving control. In one such embodiment, a drive controller is configured to calculate a basic motor-generator torque value based on the basic engine torque value and the target driving torque value, set a target engine torque to be the basic engine torque value and set a target motor-generator torque as the basic motor-generator torque value when the state of charge of the battery is within an allowable range, set the allowable range of the battery to be smaller when the transmission is performing the shift change operation and execute a basic value shift process when the battery is deviated from the allowable range. The basic value shift process suppresses deviation of the battery by shifting the target engine torque from the basic engine torque value and the target motor-generator torque from the basic motor-generator torque value.

Drive control apparatus and drive control method for hybrid vehicle

An apparatus and method for controlling a braking-force distribution in a vehicle collision is used in a vehicle including at least one electric storage device and at least one motor-generator for driving and braking. When the vehicle decelerates or stops in response to a brake operation, regenerative cooperative brake control is performed in which a braking force of a frictional brake is reduced or eliminated while a braking force of a regenerative brake applied by the motor-generator is increased by an amount corresponding to the reduction in the braking force of the friction brake. When the vehicle collides, the apparatus reduces the braking force of the regenerative brake applied by the motor-generator and increases the braking force of the friction brake.

Apparatus and method for controlling braking-force distribution in vehicle collision

A hybrid vehicle control system for cutting off fuel to an internal combustion engine of hybrid vehicle while providing smooth transitions from a hybrid drive mode to an electric drive mode is provided. The hybrid vehicle control system includes an integrated controller configured to receive inputs corresponding to vehicle speed and an indicated driving force, and to select an appropriate mode transition pattern from a group of mode transition patters according to the change in indicated driving force.

Control unit for controlling an engine stop of a hybrid vehicle

A control apparatus and method for a hybrid vehicle having a first engagement element between an engine and a motor-generator and a second engagement element between the motor-generator and a drive wheel. During EV drive mode, the first engagement element disengages and the second engagement element engages to drive the vehicle using the motor-generator. During HEV drive mode, the first and second engagement elements engage to drive the vehicle using both power sources. During a third drive mode, the first engagement element engages and the second engagement element slip-engages to drive the vehicle by both power sources. When a detected temperature of the second engagement element is too high during low-speed driving, the EV drive mode is selected to enhance durability of the second engagement element.

Control apparatus and method for hybrid vehicle

A vehicle drive control for a wheeled vehicle including a first motor generator, and a second motor generator. A planetary gear set includes a first rotating element connected to the first motor generator, a second rotating element connected to the second motor generator, and a third rotating element connected to a drive wheel. A rotation control mechanism selectively restricts rotation of one of the first and second rotating elements of the planetary gear set to establish a fixed speed ratio mode, and releases the one of the first and second rotating elements to establish a variable speed ratio mode. A control unit is configured to control each operating state of the rotation control mechanism, the first motor generator, and the second motor generator, and configured to establish the variable speed ratio mode when a slip state of the drive wheel is detected in the fixed speed ratio mode.

Vehicle drive control apparatus and method

A state of charge of a battery () that drives a motor () is computed based on a discharge current measured by a current sensor () when the discharge current of the battery () does not exceed a rated discharge range of the battery (). When the discharge current of the battery () exceeds the rated discharge range, the state of charge of the battery () is computed by estimating the discharge current of the battery () from a motor control signal, whereby current changes over a wide range can be found with good precision using the sensor (), which has a narrow but high resolution measurable range, and the state of charge can be accurately detected.

Growing community of inventors

Zama, Japan

Takeshi Hirata