Steering systems including locking controls for a motor vehicle, and motor vehicles including steering systems

Patent metadata

Field	Value
Publication number	US-9567002-B2
Application number	US-201514639547-A
Country	US
Kind code	B2
Filing date	Mar 5, 2015
Priority date	Mar 5, 2015
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A steering locking system is provided for a motor vehicle that includes a pin, a locking disc to receive the pin, an actuation device, and a control unit. The actuation device is configured to control movement of the pin. The control unit is configured to control rotation of the locking disc and movement of the pin via the actuation device. Further, the control unit is configured to permit movement of the pin into the pocket after the occurrence of a predetermined event. The steering locking system can further include a motor operatively associated with the locking disc. The control unit may be configured to control the motor at a first power level to maintain the motor in a state of readiness and to control the motor at a second power level, different from the first power level, when the locking system detects a torque applied to the steering system.

First claim

What is claimed is:

1. A steering locking system, comprising:
a pin;
a locking disc comprising first and second pockets adjacent to and separated by a plateau and configured to receive the pin; and
a control unit configured to control rotation of the locking disc and movement of the pin via an actuation device,
wherein the control unit is configured to move the pin into one of the first and second pockets after the occurrence of a predetermined event.

2. The locking system of claim 1 , wherein, during a first stage of a locking process, the control unit is configured to control rotation of the locking disc relative to the pin so the pin engages the plateau of the locking disc between the first and second pockets of the locking disc.

3. The locking system of claim 2 , further comprising a motor operatively associated with the locking disc, wherein the motor is configured to receive signals from the control unit and to rotate the locking disc relative to the pin based on the received signals.

4. The locking system of claim 3 , wherein, in the first stage of the locking process, and prior to occurrence of the predetermined event, the control unit is configured to control power supplied to the motor in order to resist movement of the locking disc relative to the pin.

5. The locking system of claim 4 , wherein the control unit is configured to control the power supplied to the motor to provide a second torque in a direction opposite to a first torque applied to a steering wheel of the steering system that causes the movement of the locking disc relative to the pin.

6. The locking system of claim 2 , wherein, after occurrence of the predetermined event, the control unit controls rotation of the locking disc relative to the pin so one of the first and second pockets is aligned with the pin to initiate a second stage of the locking process in which the pin is received within the pocket the pin is aligned with.

7. The locking system of claim 1 , wherein the predetermined event includes one of: opening a driver's door of a motor vehicle including the locking system, closing the driver's door, activation of a security system of the motor vehicle, engagement of door locks of the motor vehicle, and a weight sensor in a driver seat of the motor vehicle transitioning from detecting a weight greater than a predetermined threshold to not detecting the weight greater than the predetermined threshold.

8. The locking system of claim 1 , wherein the predetermined event is a passing of a predetermined amount of time after an engine of a motor vehicle including the locking system has been shut down.

9. The locking system of claim 1 , wherein the actuation device comprises a solenoid.

10. The locking system of claim 1 , wherein the control unit is configured to move the pin into the pocket prior to occurrence of the predetermined event when a battery of a motor vehicle having the locking system is at a baseline level.

11. An adaptive steering system for a motor vehicle, comprising a steering column and the locking system of claim 1 .

12. A steering locking system for a motor vehicle, comprising:
a pin;
a locking disc comprising at least one pocket configured to receive the pin;
an actuation device configured to control movement of the pin;
a motor operatively associated with the locking disc; and
a control unit configured to communicate with the motor, wherein the motor is configured to rotate the locking disc relative to the pin based on signals received from the control unit;
wherein the control unit is configured to control the motor at a first power level to maintain the motor in a state of readiness and to control the motor at a second power level, different from the first power level, when the locking system detects a torque applied to the steering system.

13. The locking system of claim 12 , wherein the control unit is configured to control power to the motor at the first power level when the locking disc does not move relative to the pin and, when the locking system detects the torque applied to the steering system, the control unit is configured to control the power to the motor at the second power level to control rotation of the locking disc so that movement of the locking disc relative to the pin is resisted, and
wherein the second power level is greater than the first power level and the second power level is less when an engine of the motor vehicle is off than when the engine is on.

14. The locking system of claim 13 , wherein the control unit is configured to control the power to the motor at the second power level to provide a second torque in a direction opposite to a first torque applied to a steering wheel of the steering system that causes the movement of the locking disc relative to the pin.

15. The locking system of claim 12 , wherein the at least one pocket of the locking disc comprises two pockets having bottoms with a first height,
wherein the locking disc comprises a plateau between the two pockets, the plateau having a second height greater than the first height,
wherein the locking disc further shoulders laterally to the two pockets, the shoulders having a third height, wherein the third height is greater than the first and second heights.

16. The steering locking system of claim 12 , wherein the control unit is configured to control the rotation of the locking disc in the first stage of the locking process to prevent the pin moving into the pocket until the occurrence of a predetermined event.

17. The locking system of claim 16 , wherein the predetermined event includes one of: opening a driver's door of a motor vehicle including the locking system, closing the driver's door, activation of a security system of the motor vehicle, engagement of door locks of the motor vehicle, and a weight sensor in a driver seat of the motor vehicle transitioning from detecting a weight greater than a predetermined threshold to not detecting the weight greater than the predetermined threshold.

18. A method of controlling a locking unit of a motor vehicle steering system, comprising:
receiving, at a control unit of the locking unit, a signal indicative of an engine of a motor vehicle shutting down; and
controlling, via the control unit, positioning of a pin relative to at least one pocket of a locking disc, to prevent the pin being placed into the at least one pocket until after the occurrence of a predetermined event.

19. The method of claim 18 , wherein the at least one pocket of the locking disc comprises two pockets and, further comprising, during a first stage of a locking process, controlling rotation of the locking disc relative to the pin via the control unit so the pin engages a plateau of the locking disc located between the two pockets.

20. The method of claim 19 , wherein controlling rotation of the locking disc includes powering a motor operatively associated with the locking disc.

21. The method of claim 20 , further comprising controlling the motor at a first power level to maintain the motor in a state of readiness during a first stage of a locking process and controlling the motor at a second power level, different from the first power level, to resist torque applied to the steering system when the locking system detects a torque applied to the steering system during the first stage of the locking process.

22. The method of claim 21 , wherein the second power level is greater than the first power level and the second power level has a first value when the engine is o

Assignees

• Ford Global Tech Llc

Inventors

• Rawlings Jeremy Alan
• Nehls Oliver
• Wijffels Lodewijk
• Guerra Joshua

Classifications

• B62D5/0475 Primary

  Controlling other elements · CPC title

• B62D3/02

  mechanical · CPC title

• B62D5/008

  Changing the transfer ratio between the steering wheel and the steering gear by variable supply of energy, e.g. by using a superposition gear · CPC title

• B62D5/0481

  monitoring the steering system, e.g. failures · CPC title

• B62D15/027

  Parking aids, e.g. instruction means · CPC title