US 5,457,363 A · Driving-force regulating apparatus for electric vehicle

Abstract

A driving-force regulating apparatus for an electric vehicle, including a first device which regulates, when the accelerator is operated, an output torque of the electric motor to a running torque corresponding to (A1) an operation amount of the accelerator and (A2) a rotation speed of the motor; a second device which regulates, when the vehicle satisfies a predetermined condition, the output torque of the electric motor to a creep torque corresponding to (B) one or more conditions of the vehicle; and a third device which regulates, when the accelerator is operated after termination of the creep torque regulation, the output torque of the motor to an after-creep torque corresponding to (B) the one or more conditions of the vehicle, (C1) an after-creep operation amount of the accelerator, and (C2) an after-creep rotation speed of the electric motor, the third device regulating the output torque of the motor such that the after-creep torque is different from a running torque to which the output torque of the motor is regulated in response to a same operation amount of the accelerator as the after-creep operation amount and a same rotation speed of the motor as the after-creep rotation speed.

Claims26

Dependent claims

A driving-force regulating apparatus for an electric vehicle which is driven by an electric motor, comprising:

first regulating means for regulating, when an accelerator of the electric vehicle is operated, an output torque of the electric motor to a running torque corresponding to (A1) an operation amount of the accelerator and (A2) a rotation speed of the electric motor when the accelerator is operated;
second regulating means for regulating, when the electric vehicle satisfies a predetermined condition, said output torque of the electric motor to a creep torque corresponding to (B) at least one condition of the vehicle different from an operation amount of the accelerator;
and
third regulating means for regulating, when the accelerator is operated after termination of the creep torque regulation by said second regulating means, said output torque of the electric motor to an after-creep torque corresponding to (B) said at least one condition of the vehicle when the vehicle satisfies said predetermined condition, (C1) an after-creep operation amount of the accelerator after said termination of said creep torque regulation, and (C2) an after-creep rotation speed of the electric motor when the accelerator is operated after said termination of said creep torque regulation,
said third regulating means regulating said output torque of the electric motor to said after-creep torque such that said after-creep torque is different from a running torque to which said output torque of the motor is regulated by said first regulating means in response to a same operation amount of the accelerator as said after-creep operation amount thereof and a same rotation speed of the motor as said after-creep rotation speed thereof.

2 more elements

A driving-force regulating apparatus for an electric vehicle which is driven by an electric motor, comprising:

a memory which stores data indicative of a relationship between creep torque and at least one parameter indicative of at least one condition of the electric vehicle;
torque regulating means for determining, when a running speed of the electric vehicle is around zero, a creep torque corresponding to at least one actual value of said at least one parameter, according to said data stored in said memory, and regulating an output torque of the electric motor to the determined creep torque;
torque adjusting means for adjusting said output torque of the electric motor from said determined creep torque to an adjusted creep torque, so that with said adjusted creep torque the electric vehicle is driven at a predetermined running speed around zero;
and
data updating means for updating said data stored in said memory, based on said adjusted creep torque.

2 more elements

A driving-force regulating apparatus for an electric vehicle which is driven by an electric motor, comprising:

a brake switch which detects operation of a brake device of the electric vehicle for braking the vehicle;
a braking-force detector which detects a braking force applied to the brake device, when said brake switch detects said operation of the brake device and simultaneously when a running speed of the vehicle is around zero;
and
torque regulating means for regulating, when said brake switch detects termination of said operation of the brake device, an output torque of the electric motor to a creep torque corresponding to the braking force detected by said braking-force detector, so that said running speed of the electric vehicle is maintained at around zero.

1 more element

Dependencies are inferred from the claim text.

Driving-force regulating apparatus for electric vehicle

Life of this patent

Driving-force regulating apparatus for electric vehicle

Life of this patent

Abstract

Claims26