Device and method for regulating the driving speed of a vehicle
First Claim
1. A method of regulating a driving speed of a vehicle having at least one electric motor/generator, as a function of at least its actual speed and the required setpoint speed, the method comprising:
- determinating the actual speed, the setpoint speed being adjustable;
comparing the actual speed with the setpoint speed;
if the actual speed is greater than the setpoint speed, decelerating the vehicle by operating the electric motor/generator as a generator;
if the actual speed is less than the setpoint speed, operating the electric motor/generator as a motor; and
wherein at least one of a short-term fluctuation and a minor fluctuation in the driving torque required to keep the vehicle at a constant speed are compensated exclusively by the at least one electric motor/generator;
whereby, after a certain period of time during which fluctuations in the driving torque are compensated exclusively by the at least one electric motor/generator, the torque of the internal combustion engine is regulated up or down via an integrator, and a contribution of the at least one electric motor/generator to a total driving torque is returned to zero.
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Accused Products
Abstract
A device and a method implementable therewith for regulating the driving speed of at least one vehicle, having an electric motor/generator connected or connectable to a drive train for at least one wheel as a function of at least its actual speed and setpoint speed. The device includes a control unit for controlling the torque of the electric motor/generator, an arrangement for driving the electric motor/generator, an arrangement for recording the actual speed of the vehicle and an arrangement for preselecting the setpoint speed of the vehicle. In the device, the electric motor/generator is usable in generator operation to generate a braking torque and in engine operation to generate a driving torque.
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Citations
7 Claims
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1. A method of regulating a driving speed of a vehicle having at least one electric motor/generator, as a function of at least its actual speed and the required setpoint speed, the method comprising:
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determinating the actual speed, the setpoint speed being adjustable; comparing the actual speed with the setpoint speed; if the actual speed is greater than the setpoint speed, decelerating the vehicle by operating the electric motor/generator as a generator; if the actual speed is less than the setpoint speed, operating the electric motor/generator as a motor; and wherein at least one of a short-term fluctuation and a minor fluctuation in the driving torque required to keep the vehicle at a constant speed are compensated exclusively by the at least one electric motor/generator; whereby, after a certain period of time during which fluctuations in the driving torque are compensated exclusively by the at least one electric motor/generator, the torque of the internal combustion engine is regulated up or down via an integrator, and a contribution of the at least one electric motor/generator to a total driving torque is returned to zero. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification