A vehicle includes an electric motor and an engine selectively coupled to the electric motor. The vehicle has an electric motor controller configured to, in response to (i) an absence of receiving a motor command signal within a predetermined time, (ii) a battery voltage being below a first threshold and (iii) a motor speed exceeding a second threshold, restrict operation of the electric motor to a limited operating mode and control the electric motor to generate a charging torque for a battery.

A vehicle travel assist device installed on a vehicle includes: a vehicle travel control device that controls travel of the vehicle; and a travel state acquisition device that acquires travel state information indicating a travel state of the vehicle. The vehicle travel control device: detects that a first wheel of the vehicle climbs over a difference-in-level, based on the travel state information; acquires a first driving force required for the first wheel to climb over the difference-in-level or a change in the travel state when the first wheel passes the difference-in-level, as reference information, based on the travel state information; estimates a second driving force required for a second wheel of the vehicle to climb over the difference-in-level, based on the reference information; and generates the estimated second driving force when the second wheel passes the difference-in-level after the first wheel.

An autonomous parking control device executes vehicle traveling control that calculates a command value of a propulsive force based on an operating state, and moves the vehicle to a target position autonomously by controlling a propulsive force generating device in accordance with the command value. The control device executes an additional command value varying process of adding a predetermined additional command value to the command value when the vehicle stops due to the propulsive force being insufficient during the vehicle traveling control, and decreasing or keeping the additional command value by a predetermined degree of suppression, when the vehicle which is stopped is started. Here, when executing the additional command value varying process in the first position far from the target position, the degree of suppression is set to be smaller as compared with a case of executing the process in a second position close to the target position.

A hybrid vehicle includes an engine, a first motor, a planetary gear mechanism, a second motor, a battery, and an electronic control unit. The electronic control unit is configured to: set a shift stage based on a depression amount of an accelerator and a vehicle speed or a driver's operation; set a base driving force based on the degree of the depression amount of the accelerator, the vehicle speed, and a target rotation speed; set a correction driving force such that the correction driving force increases with an increase in elapsed time after upshifting or an increase in the vehicle speed after upshifting when the shift stage upshifts; and control the engine, the first motor, and the second motor such that a driving force obtained by correcting the base driving force using the correction driving force is output to the drive shaft.

A device for optimizing the electrical power generated by an electric machine in the coasting mode of a vehicle includes a module for computing a total regenerative torque or a variable proportional thereto, on the basis of which the electric machine is operated in generator mode. The module is configured to: compare the wheel slip that is present at at least one wheel of the vehicle to a predefined threshold value; reduce the total regenerative torque by a small amount when the ascertained wheel slip is less than the predefined threshold value; and increase the total regenerative torque by a small amount when the ascertained wheel slip is greater than the predefined threshold value. The reduction or increase takes place iteratively with multiple successive iteration steps.

A hybrid electric vehicle system comprises an internal combustion (IC) engine and an electric engine providing power to a drive shaft of the vehicle. The IC engine receives a fuel from a fuel tank. Exhaust gases from the IC engine are treated at an exhaust treatment apparatus including a reagent tank containing a reagent. A controller monitors a quality of the fuel in the fuel tank and the reagent in the reagent tank and if needed, initiates fuel degradation reduction event or a reagent degradation reduction event. These events can include running the IC engine even if a battery supplying power to the motor is not discharged. The fuel degradation reduction event includes dosing the fuel tank with an antioxidant to reduce the rate of degradation of the fuel.

An electric drive direction confirmation system and method for a vehicle are provided. The system and method include receiving a gear selector input signal corresponding to a gear selection from an electronic gear selector on the vehicle, and sending a drive command to temporarily urge the vehicle in a direction corresponding to the gear selection.

A vehicle traveling control method includes determining a driver's intention for acceleration during vehicle traveling, predicting, when a determination is made that the driver has no intention for acceleration, which is superior between a first fuel consumption reduction effect by inertial traveling and a second fuel consumption reduction effect by deceleration energy regeneration, the inertial traveling making the vehicle travel, with power transmission disconnected between an engine and a drive wheel of the vehicle, and the deceleration energy regeneration inputting rotational power of the drive wheel of the vehicle to an electric motor, and performing inertial traveling when a prediction is made that the first fuel consumption reduction effect by inertial traveling is superior to the second fuel consumption reduction effect by deceleration energy regeneration.

Provided is a control device for a hybrid vehicle including a controller that performs a control of the hybrid vehicle including an engine and an electric motor that serve as driving sources, a transmission, and first and second clutches. The first clutch is provided between the engine and the transmission. The second clutch is provided between the transmission and driving wheels. The controller includes first and second control units. The first control unit performs a control, in a motor traveling mode, to bring the first clutch to a disengaged state. The motor traveling mode includes traveling solely with the electric motor being driven. The second control unit performs a control, in the motor traveling mode, to bring the second clutch to a mildly engaged state in which input, from the driving-wheel side, of torque larger than driving torque causes the second clutch to slide.

A range extender for a vehicle, comprises an electric machine; an engine; and a controller, wherein the controller is configured to control fuelling of the engine, and is configured to control the electric machine to charge a battery of the vehicle using power from the engine and at other times to control the electric machine to drive the engine using power from the battery, wherein the controller is configured to increase the engine speed by controlling the electric machine to drive the engine using power from the battery whilst substantially not fuelling the engine.