System and method for braking a towed conveyance

• US 6,516,925 B1
• Filed: 09/28/2000
• Issued: 02/11/2003
• Est. Priority Date: 09/28/2000
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Crombez, Dale Scott, Napier, Steven Lee
• Primary Examiner(s): RODRIGUEZ, PAMELA
• Application Number:
  US09/672,441
• Time in Patent Office: 866 Days
• Field of Search: 303/3, 303/7, 303/15, 303/17, 303/20, 303/29, 198/112.A, 198/112.R
• US Class Current: 188/112.00A
• CPC Class Codes: B60L 2200/28 Trailers
• CPC Class Codes: B60L 7/10 Dynamic electric regenerative braking B60L7/22 takes precedence
• CPC Class Codes: B60T 1/10 by utilising wheel movement for accumulating energy, e.g. driving air compressors
• CPC Class Codes: B60T 13/662 characterised by specified functions of the control system components
• CPC Class Codes: B60T 2230/06 Tractor-trailer swaying
• CPC Class Codes: B60T 2270/613 ESP features related thereto
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B60T 8/1708 for lorries or tractor-trailer combinations
• CPC Class Codes: B60T 8/246 Change of direction
• CPC Class Codes: B60T 8/248 Trailer sway, e.g. for preventing jackknifing

Abstract

A system and method for braking a towed conveyance. In one embodiment, a system is provided for use on a trailer (102) having an axle assembly (108). The system (100) includes a motor controller (124), a pair of electric motor/generators (120), a battery (122), a battery controller (126), and sensors (128). Controller (124) monitors the yaw rate of trailer (102) by use of sensors (128). Based upon the monitored yaw rate, controller (124) selectively activates motor/generators (120) which provide a regenerative braking torque to axle assembly (108), thereby braking trailer (102) and generating electrical energy which may be used to recharge battery (122).

Claims

1. A method for towing a first automobile by the use of a second automobile wherein said first and said second automobiles each being of the type having a braking system and a controller which is coupled to said braking system, said method comprising:

generating a brake request signal in said second automobile;

communicating said generated brake request signal to said controller which is resident within said second automobile;

causing said controller within said second automobile to activate said braking system of said second automobile upon receipt of said brake request signal, thereby braking said second automobile by a certain first amount;

causing said controller of said second automobile to generate a brake request signal to said controller of said first automobile;

causing said controller of said first automobile to activate said braking system of said first automobile upon receipt of said brake request signal emanating from said controller of said second automobile, thereby braking said first automobile by a certain second amount which is less than said first amount, thereby causing said braking system of said first automobile to augment said braking system of said second automobile by supplementing the amount of braking provided by said braking system of said first automobile.

2. The method of claim 1 further comprising the step of causing said first automobile to begin braking shortly after said second automobile has begun braking.

3. The method of claim 2 wherein said controller of said second automobile activates said braking system by applying a certain magnitude of voltage to said braking system in response to a certain depression of a brake pedal resident within said second automobile and wherein said step of braking said first automobile by a certain second amount which is less than said first amount further comprises the steps of:

activating said braking system of said second automobile by applying said certain magnitude of voltage from said controller of said second automobile to said braking system in response to said certain depression of said brake pedal;

calculating a predetermined percentage of said certain magnitude of voltage; and

communicating said calculated percentage of said certain magnitude of voltage to said controller of said first automobile, thereby allowing the braking force which was applied to said first automobile to supplement the braking force which was applied to said second automobile.

4. A method for towing a first automobile by the use of a second automobile wherein said first and said second automobiles each being of the type having at least one driver operated assembly and a controller which is coupled to said at least one driver operated assembly, said method comprising:

generating a driver operated control signal in said second automobile;

communicating said generated driver operated control signal to said controller which is resident within said first automobile;

causing said controller within said second automobile to activate said at least one driver operated assembly within said second automobile upon receipt of said driver operated control signal;

causing said controller of said second automobile to generate a driver operated control request signal to said controller of said first automobile; and

causing said controller of said first automobile to activate said at least one driver operated assembly of said first automobile upon receipt of said driver operated control request signal emanating from said controller of said second automobile.

5. The method of claim 4 further comprising the step of causing said first automobile to activate said at least one driver operated assembly shortly after said second automobile has activated said at least one driver operated assembly.

6. The method of claim 5 wherein said at least one driver operated assembly of said first and said second automobiles comprises a left hand turn indicator.

7. The method of claim 6 wherein said left hand turn indicator of said first and said second automobiles further comprises a blinking left hand turn signal light.

8. The method of claim 5 wherein said at least one driver operated assembly of said first and said second automobiles comprises a right hand turn indicator.

9. The method of claim 8 wherein said right hand turn indicator of said first and said second automobiles further comprises a blinking right hand turn signal light.

10. A method for towing a first automobile by the use of a second automobile wherein said first and said second automobiles each being of the type having a braking system, at least one driver operated assembly, and a controller which is coupled to said braking system and said at least one driver operated assembly, said method comprising:

generating a brake request signal in said second automobile;

generating a driver operated control signal in said second automobile;

communicating said generated brake request signal to said controller which is resident within said second automobile;

communicating said generated driver operated control signal to said controller which is resident within said second automobile;

causing said controller within said second automobile to activate said braking system of said second automobile upon receipt of said brake request signal, thereby braking said second automobile by a certain first amount;

causing said controller within said second automobile to activate said at least one driver operated assembly of said second automobile upon receipt of said driver operated control signal;

causing said controller of said second automobile to generate a brake request signal to said controller of said first automobile;

causing said controller of said second automobile to generate a driver operated control request signal to said controller of said first automobile;

causing said controller of said first automobile to activate said braking system of said first automobile upon receipt of said brake request signal emanating from said controller of said second automobile, thereby braking said first automobile by a certain second amount which is less than said first amount, thereby causing said braking system of said second automobile to augment said braking system of said first automobile by supplementing the amount of braking provided by said braking system of said first automobile; and

causing said controller of said first automobile to activate said at least one driver operated assembly of said first automobile upon receipt of said driver operated control request signal emanating from said controller of said second automobile.

11. The method of claim 10 further comprising the step of causing said first automobile to activate said at least one driver operated assembly shortly after said second automobile has activated said at least one driver operated assembly.

12. The method of claim 11 further comprising the step of causing said first automobile to begin braking shortly after said second automobile has begun braking.

13. The method of claim 10 wherein said controller of said second automobile activates said braking system by applying a certain magnitude of voltage to said braking system in response to a certain depression of a brake pedal resident within said second automobile and wherein said step of braking said first automobile by a certain second amount which is less than said first amount further comprises the steps of:

activating said braking system of said second automobile by applying said certain magnitude of voltage from said controller of said second automobile to said braking system in response to said certain depression strength of said brake pedal;

calculating a predetermined percentage of said certain magnitude of voltage; and

communicating said calculated percentage of said certain magnitude of voltage to said controller of said first automobile, effective to cause said controller of said first automobile to activate said braking system of said first automobile, thereby allowing the braking force which was applied to said first automobile to supplement the braking force which was applied to said second automobile.

14. The method of claim 10 wherein said at least one driver operated assembly of said first and said second automobiles comprises a left hand turn indicator.

15. The method of claim 14 wherein said left hand turn indicator of said first and said second automobiles further comprises a blinking left hand turn signal light.

16. The method of claim 10 wherein said at least one driver operated assembly of said first and said second automobiles comprises a right hand turn indicator.

17. The method of claim 16 wherein said right hand turn indicator of said first and said second automobiles further comprises a blinking right hand turn signal light.