Tandem axle anti-skid system
AssigneeDana Corporation
InventorPaul D. Levering
Life of this patent
Estimating the term…
Abstract
An anti-skid system for a tandem axle vehicle including an improved vehicle suspension for opposing a selected portion of the braking torque which tends to unload the front axle during breaking to eliminate brake hop. The suspension cooperates with an anti-skid circuit to increase braking efficiency. In one embodiment, the anti-skid circuit senses a skid condition at the rear wheels on a per side basis and controls the braking of the wheels on that side in response thereto. In an alternate embodiment, the anti-skid circuit senses a skid condition at either the front or rear wheels on a per side basis and controls the braking of the wheels on that side in response thereto.
Claims14
An anti-skid system for a vehicle having a load supporting tandem axle unit, comprising:
- means for transferring a selected portion of the vehicle load to one of the axles of said tandem axle unit during braking whereby the load imposed on said one axle exceeds the load imposed on the other axle of said tandem axle unit;
- sensing means for sensing the rotational velocity of a wheel attached to said other axle and generating an output signal representative of the sensed velocity;
- control means responsive to said output signal for detecting a skid condition at said wheel attached to said other axle and generating a control signal in reponse thereto;
- and
- actuating means responsive to said control signal for modulating the brakes at said wheel attached to said other axle and a wheel attached to said one axle.
An anti-skid system for a vehicle including a load supporting tandem axle unit having a front axle proximately spaced with respect to a rear axle, wherein each of the axles has a left side wheel and a right side wheel attached thereto, comprising:
- means for transferring a selected portion of the vehicle load to said front axle during braking whereby the load imposed on said front axle exceeds the load imposed on said rear axle;
- a first sensing means for sensing the rotational velocity of said left side rear wheel and generating a first output signal representative of the sensed velocity;
- a second sensing means for sensing the rotational velocity of said right side rear wheel and generating a second output signal representative of the sensed velocity;
- control means reponsive to said first output signal for detecting a skid condition at said left side rear wheel and for generating a first control signal in response thereto and responsive to said second output signal for detecting a skid condition at said right side rear wheel and for generating a second control signal in response thereto;
- first actuating means responsive to said first control signal for modulating the brakes at said left side front wheel and said left side rear wheel;
- and
- second actuating means responsive to said second control signal for modulating the brakes at said right side front wheel and said right side rear wheel.
An anti-skid system for a vehicle including a load supporting tandem axle unit having a front axle proximately spaced with respect to a rear axle, wherein each of the axles has a left side wheel and a right side wheel attached thereto, comprising:
- means for equalizing the vehicle load between said front and rear axles during braking;
- a sensing means associated with each of said wheels for sensing the rotational velocity of said associated wheel and generating an output signal representative of the sensed velocity;
- first actuating means responsive to a first control signal for modulating the brakes at said left side wheels;
- second actuating means responsive to a second control signal for modulating the brakes at said right side wheels;
- control means reponsive to said output signals representative of the sensed velocities at said left side wheels for selecting the one of said output signals representing the slower rotational velocity, said control means being responsive to said selected output signal for detecting a skid condition at the one of said left side wheels associated with said selected output signal and for generating said first control signal in response thereto;
- and
- wherein said control means is responsive to the sensed velocities at said right side wheels for selecting the one of said output signals representing the slower rotational velocity, said control means being responsive to said selected output signal for detecting a skid condition at the one of said right side wheels associated with said selected output signal and for generating said second control signal in response thereto.
Dependencies are inferred from the claim text.