The electric vehicle control method is a control method that includes the motor that gives braking force or driving force to a vehicle in accordance with an accelerator operation, by which the braking force is controlled when an accelerator operation amount is smaller than a given value and the driving force is controlled when the accelerator operation amount is the given value or larger. The electric vehicle control device estimates disturbance torque that acts on the motor as resistance component relating to a gradient and executes correction by which the braking force or the driving force is increased or decreased so as to cancel the resistance component in accordance with a disturbance torque estimated value Td. Then, on a downhill road at a given gradient or more, a correction amount of the braking force or the driving force is reduced.

An auto-balance hill-hold apparatus and method for arresting unintentional roll after coming to a stop on a hill or slope in vehicles powered by magnetic synchronous motors by automatically determining and rapidly applying the appropriate balancing counter-torque required to negate torque caused by the acceleration of gravity, and subsequently communicating the magnitude of the determined counter-torque to a speed controller so that it may seamlessly transition to an alternative and more efficient method of generating the equivalent balancing counter-torque and provide a smoother transition to operation mode.

A control method for an electric vehicle controls braking force when the accelerator operation amount is less than a prescribed value and controls drive force when the accelerator operation amount is at least a prescribed value. The electric vehicle control method estimates disturbance torque that acts on the motor as a resistance component relating to gradient; and executes correction whereby the braking force or the drive force is increased/decreased on the basis of the disturbance torque estimated value, such that the resistance component is negated. A determination is made regarding whether or not the accelerator operation amount is a partial equivalent amount and, if at least either the accelerator operation amount on a downhill road is greater than the partial equivalent amount or the accelerator operation amount on an uphill road is less than the partial equivalent amount, the correction amount is reduced.

A control method for an electric vehicle controls braking force when the accelerator operation amount is less than a prescribed value and controls drive force when the accelerator operation amount is at least a prescribed value. The electric vehicle control method estimates disturbance torque that acts on the motor as a resistance component relating to gradient; and executes correction whereby the braking force or the drive force is increased/decreased on the basis of the disturbance torque estimated value, such that the resistance component is negated. A determination is made regarding whether or not the accelerator operation amount is a partial equivalent amount and, if at least either the accelerator operation amount on a downhill road is greater than the partial equivalent amount or the accelerator operation amount on an uphill road is less than the partial equivalent amount, the correction amount is reduced.

A vehicle having a drive axle system and a method of control. Electrical energy is provided from an electric power source to an electric motor to offset regenerative power generated by the electric motor when the vehicle is in motion and braking and acceleration of the vehicle are not requested.

A through the road (TTR) hybridization strategy is proposed to facilitate introduction of hybrid electric vehicle technology in a significant portion of current and expected trucking fleets. In some cases, the technologies can be retrofitted onto an existing vehicle (e.g., a truck, a tractor unit, a trailer, a tractor-trailer configuration, at a tandem, etc.). In some cases, the technologies can be built into new vehicles. In some cases, one vehicle may be built or retrofitted to operate in tandem with another and provide the hybridization benefits contemplated herein. By supplementing motive forces delivered through a primary drivetrain and fuel-fed engine with supplemental torque delivered at one or more electrically-powered drive axles, improvements in overall fuel efficiency and performance may be delivered, typically without significant redesign of existing components and systems that have been proven in the trucking industry.

Includes electric motor (330) driving driving wheel (610) , speed control unit (300) controlling driving of electric motor (330) based on instructed speed .sub.r*, brake control unit (400) controlling hydraulic brake (500) applying mechanical braking to an electromotive vehicle, speed sensor (340) detecting traveling speed .sub.r of the electromotive vehicle, and determination unit (200) determining whether the mechanical braking needs to be applied in response to the difference between instructed speed .sub.r* and traveling speed .sub.r, and controlling operation of brake control unit (400) based on the determination result. Determination unit (200) determines that mechanical braking needs to be applied when instructed speed .sub.r* indicates deceleration and traveling speed .sub.r is higher than instructed speed .sub.r* , and performs control so that brake control unit (400) works hydraulic brake (500).

A smart braking system for a vehicle is provided. The smart braking system selectively activates a braking system of the vehicle when the smart braking system detects a scenario in which it is likely that a constant vehicle speed, rather than an increasing vehicle speed, would be desired by a driver. In one example, a driver releases an accelerator while the vehicle is on a decline but the vehicle accelerates anyway. In this instance, the smart braking system records the speed of the vehicle when the accelerator is released and applies the braking system to maintain the speed of the vehicle at the recorded speed while the vehicle is on the decline. The smart braking system stops activating the braking system upon detecting that braking is no longer needed to slow down the vehicle.

A system for maintaining a selected speed of a vehicle is provided. The vehicle is powered in part by an electric motor and a battery. The electric motor is operable to drive in either a driving state or a charging state. In the charging state the polarity of the electric motor is modified so as to slow the vehicle down and supply power to the battery. A load bank is provided. The load bank is in electrical communication with the electric motor. The controller is further operable to direct power from the electric motor to the load bank when the electric motor is in the charging state.

A control device for a transport vehicle configured to travel with a driving force output from an electric motor is provided. When the transport vehicle is driven by a driving force of the electric motor and a variation rate is equal to or less than a predetermined value while a parameter relating to a traveling speed of the transport vehicle is less than a first predetermined value, the control device sets a threshold value, at which an output limit of the electric motor is started based on a parameter relating to a temperature of the electric motor or a temperature of an electric device for driving the electric motor, to a variable value corresponding to a required driving force to the transport