System for controlling motor vehicle driving force

Claim 3

The system of claim 1, further including means for calculating an acceleration of the driving wheel and means for comparing said driving wheel acceleration to a predetermined value, wherein said brake pressure controlling means is operable for selectively increasing, decreasing and maintaining said brake pressure in response to at least one of the conditions of an increase in said driving wheel acceleration greater than or equal to said predetermined value and an increase in speed of the driving wheel of greater than or equal to said first threshold speed value.

Claim 4

The system of claim 2, including means for detecting whether the driving wheel speed is increasing.

Claim 5

The system of claim 3, wherein the brake pressure controlling means decreases the brake pressure on the driving wheel in response to at least one of the conditions of said driving wheel having a speed which is not increasing at times when the driving wheel speed is greater than said second threshold speed value and the driving wheel speed being less than said first threshold speed value.

Claim 6

The system of claim 3, wherein said brake pressure controlling means maintains the brake pressure on the driving wheel in response to the condition of said driving wheel having a speed which is not increasing at times when said driving wheel speed is greater than or equal to said first threshold speed value and less than said second threshold speed value.

Claim 7

The system of claim 2, wherein said brake pressure control means increases the brake pressure of the driving wheel in response to the condition of increasing driving wheel speed and at times when said driving wheel speed is greater than or equal to said first threshold speed value.

Claim 8

In a vehicle for traveling over a surface, the vehicle having a driving wheel and a driven wheel, the driving wheel disposed to be accelerated by a motor vehicle engine and subjected to variable pressure from a braking means, a method for accelerating the vehicle while controlling slippage of the driving wheel comprising the steps of: detecting a rotation speed of the driven wheel, while accelerating the driving wheel with the motor vehicle engine; detecting a rotation speed of the driving wheel, while accelerating the driving wheel with the moor vehicle engine; determining whether the rotation speed of the driving wheel exceeds a first sum corresponding to the rotation speed of the driven wheel and a first positive value, while accelerating the driving wheel with the motor vehicle engine; determining whether the rotation speed of the driving wheel exceeds a second sum corresponding to the rotation speed of the driven wheel and a second positive value, while accelerating the driving wheel with the motor vehicle engine, the second positive value being larger than the first positive value; determining whether the rotation speed of the driving wheel is increasing, while accelerating the driving wheel with the motor vehicle engine; increasing the amount of pressure at times when the rotation speed is increasing and exceeds the first sum, while accelerating the driving wheel with the motor vehicle engine; decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and exceeds the second sum; and decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and does not exceed the first sum.

Claim 9

In a vehicle for traveling over a surface, the vehicle having a driving wheel and a driven wheel, the driving wheel disposed to be accelerated by a motor vehicle engine and subjected to variable pressure from a braking means, a method for accelerating the vehicle while controlling slippage of the driving wheel comprising the steps of: detecting a rotation speed of the driven wheel, while accelerating the driving wheel with the motor vehicle engine; detecting a rotation speed of the driving wheel, while accelerating the driving wheel with the moor vehicle engine; determining whether the rotation speed of the driving wheel exceeds a first sum corresponding to the rotation speed of the driven wheel and a first positive value, while accelerating the driving wheel with the motor vehicle engine; determining whether the rotation speed of the driving wheel exceeds a second sum corresponding to the rotation speed of the driven wheel and a second positive value, while accelerating the driving wheel with the motor vehicle engine, the second positive value being larger than the first positive value; determining whether the rotation speed of the driving wheel is increasing, while accelerating the driving wheel with the motor vehicle engine; increasing the amount of pressure at times when the rotation speed is increasing and exceeds the first sum, while accelerating the driving wheel with the motor vehicle engine; decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and exceeds the second sum; and decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and does not exceed the first sum.

Claim 10

A method according to claim 7, wherein the step of determining whether the rotation speed is increasing includes the substep of comparing, responsive to the step of detecting a rotation speed of the driving wheel, the rotation speed of the driving wheel at 2 successive points in time.

Claim 11

A method according to claim 7, further including the step of setting the first positive value to a constant.

Claim 12

A method according to claim 9, further including the step of setting the second positive value to a constant.

Claim 13

A method according to claim 7, further including the step of setting the first positive value in accordance with the speed of the driven wheel.

Claim 14

A method according to claim 11, further including the step of setting the second positive value in accordance with the speed of the driven wheel.

Claim 15

In a vehicle for traveling over a surface, the vehicle having a driving wheel and a driven wheel, the driving wheel disposed to be accelerated by a motor vehicle engine and subjected to variable pressure from a braking means, a system for accelerating the vehicle while controlling slippage of the driving wheel comprising: first detecting means for detecting a rotation speed of the driven wheel; second detecting means for detecting a rotation speed of the driving wheel; first determining means, coupled to the first detecting means and to the second detecting means, for determining whether the rotation speed of the driving wheel exceeds a first sum corresponding to the rotation speed of the driven wheel and a first positive value; second determining means, coupled to the first detecting means and to the second detecting means, for determining whether the rotation speed of the driving wheel exceeds a second sum corresponding to the rotation speed of the driven wheel and a second positive value, the second positive value being larger than the first positive value; third determining means, coupled to the first detecting means, for determining whether to rotation speed of the driving wheel is increasing; means, coupled to the first determining means and to the third determining means, for increasing the amount of pressure, during acceleration of the driving wheel by the motor vehicle engine, at times when the rotation speed of the driving wheel is increasing and exceeds the first sum; means, coupled to the second determining means and to the third determining means, for decreasing the amount of pressure at time when the rotation speed of the driving wheel is both not increasing and exceeds the second sum; means, coupled to the first determining means and to the third determining means, for decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and does not exceed the first sum.

Claim 16

In a vehicle for traveling over a surface, the vehicle having a driving wheel and a driven wheel, the driving wheel disposed to be accelerated by a motor vehicle engine and subjected to variable pressure from a braking means, a system for accelerating the vehicle while controlling slippage of the driving wheel comprising: first detecting means for detecting a rotation speed of the driven wheel; second detecting means for detecting a rotation speed of the driving wheel; first determining means, coupled to the first detecting means and to the second detecting means, for determining whether the rotation speed of the driving wheel exceeds a first sum corresponding to the rotation speed of the driven wheel and a first positive value; second determining means, coupled to the first detecting means and to the second detecting means, for determining whether the rotation speed of the driving wheel exceeds a second sum corresponding to the rotation speed of the driven wheel and a second positive value, the second positive value being larger than the first positive value; third determining means, coupled to the first detecting means, for determining whether to rotation speed of the driving wheel is increasing; means, coupled to the first determining means and to the third determining means, for increasing the amount of pressure, during acceleration of the driving wheel by the motor vehicle engine, at times when the rotation speed of the driving wheel is increasing and exceeds the first sum; means, coupled to the second determining means and to the third determining means, for decreasing the amount of pressure at time when the rotation speed of the driving wheel is both not increasing and exceeds the second sum; means, coupled to the first determining means and to the third determining means, for decreasing the amount of pressure at times when the rotation speed of the driving wheel is both not increasing and does not exceed the first sum.

Claim 17

A system according to claim 13, further including fluid pressure supplying means, wherein the means for increasing the pressure includes a first valve means connected in series between the fluid pressure supplying means and the driving wheel.

Claim 18

A system according to claim 13, further including fluid reservoir means, wherein the means for decreasing the pressure includes a second valve means connected in series between the fluid reservoir means and the driving wheel.

Claim 19

A system according to claim 15, further including a brake actuator, coupled to the driving wheel in parallel with the pressure increasing means, and means for coupling the brake actuator to a brake pedal.

Claim 20

A system according to claim 16, further including means for detecting an acceleration of the driving wheel greater than a predetermined acceleration; third valve means, connected in series between the brake actuator and the driving wheel; and means, coupled to the acceleration detecting means, for closing the third valve means in response to the detected acceleration being greater than said predetermined acceleration.

Claim 21

A system according to claim 13, further including means for detecting an acceleration of the driving wheel greater than a predetermined acceleration; means, coupled to the first determining means and to the acceleration detecting means, for opening a first valve for a predetermined period of time in response to the speed of the driving wheel being less than the first sum and the acceleration of the driving wheel being greater than the predetermined acceleration.

Claim 22

A system according to claim 13, wherein the means for determining whether the rotational speed of the driving wheel is increasing includes means, coupled to the means for detecting a rotation speed of the driving wheel, for comparing the rotation speed of the driving wheel at 2 successive points in time.

Claim 23

A system according to claim 13, further including means for setting the first positive value to a constant.

Claim 24

A system according to claim 20, further including means for setting the second positive value to a constant.

Claim 25

A system according to claim 13, further including means for setting the first positive value in accordance with the speed of the driven wheel.

Claim 26

A system according to claim 20, further including means for setting the second positive value in accordance with the speed of the driven wheel.