GEAR BLOCKOUT FOR A MANUAL TRANSMISSION

• US 20140373661A1
• Filed: 06/18/2014
• Published: 12/25/2014
• Est. Priority Date: 06/19/2013
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Eugene H. Polan Jr
• Inventors: Benson, Robert A., Laba, Lawrence K., Polan, Eugene H. Jr.
• Granted Patent: US 9,506,557 B2
• Time in Patent Office: Days
• US Class Current: 74/473.21
• CPC Class Codes: F16H 2061/166 Preventing or initiating shifts for preventing stall or overspeed of engine
• CPC Class Codes: F16H 59/04 Ratio selector apparatus
• CPC Class Codes: F16H 59/042 comprising a final actuating mechanism multiple final output mechanism in a gearbox F16H63/08
• CPC Class Codes: F16H 61/18 Preventing unintentional or unsafe shift , e.g. preventing manual shift from highest gear to reverse gear
• CPC Class Codes: F16H 61/22 Locking of the control input devices constructional features of locking or disabling mechanisms F16H63/34
• CPC Class Codes: Y10T 74/20085 Restriction of shift, gear selection, or gear engagement

Abstract

A shifter assembly for a manual transmission includes a shifter housing, a shift lever and a gear blockout. The shift lever includes a shift plane select member configured to move to a first and second gear shift plane and a gear engagement member configured to move along the first and second gear shift plane to a first gear position. The shift plane select member and the gear engagement member are each operatively coupled to the transmission. The gear blockout is positioned within the shifter housing and configured to be selectively actuated to (i) block movement of the shift plane select member to the shift plane position thereby preventing the manual transmission from being shifted into first and second gears, and (ii) block movement of the gear engagement member to the first gear position thereby preventing the manual transmission from being shifted into first gear.

Claims

1. A shifter assembly for a manual transmission, comprising:

a shifter housing adapted to be positioned remote from the manual transmission in an interior of a vehicle;

a shift lever pivotably supported relative to the housing, the shift lever including a shift plane select member and a gear engagement member each adapted to be operably coupled to the manual transmission, the shift plane select member adapted to, upon movement of the shift lever in a first direction to a first and second gear shift plane, move to a shift plane position to facilitate the transmission shifting into first or second gear, and the gear engagement member adapted to, upon movement of the shift lever in a second direction along the first and second gear shift plane to a first gear position, shift the transmission into first gear; and

a gear blockout positioned within the shifter housing, the gear blockout configured to be selectively actuated to (i) block movement of the shift plane select member to the shift plane position thereby preventing the manual transmission from being shifted into first and second gears, and (ii) block movement of the gear engagement member to the first gear position thereby preventing the manual transmission from being shifted into first gear.

2. The shifter assembly of claim 1, wherein the gear blockout is configured to be selectively actuated to (i) block movement of the shift plane select member to the shift plane position thereby preventing the manual transmission from being shifted into first and second gears based on an upper predetermined speed threshold, and (ii) block movement of the gear engagement member to the first gear position while allowing movement to a second gear position thereby preventing the manual transmission from being shifted into first gear based on a lower predetermined speed threshold less than the upper predetermined threshold.

3. The shifter assembly of claim 2, wherein the gear blockout includes a shift plane blockout device and a gear engagement blockout device, the shift plane blockout device configured to be actuated at the upper predetermined speed threshold to block the movement of the shift plane select member to the shift plane position, and wherein the gear engagement blockout device is configured to be actuated at the lower predetermined speed threshold to block the movement of the gear engagement member to the first gear position while allowing movement to the second gear position.

4. The shifter assembly of claim 3, wherein the gear engagement blockout device is configured to be actuated while the shift plane blockout device is configured to be deactuated at the lower predetermined speed threshold thereby permitting the shift lever to move to the first and second gear shift plane and the shift plane select member to move to the shift plane position and permitting the shift lever to move to the second gear position while preventing the shift lever from moving to the first gear position.

5. The shifter assembly of claim 3, wherein the shift plane and gear engagement blackout devices comprise electromechanical devices.

6. The shifter assembly of claim 5, wherein the electromechanical devices comprise solenoid devices.

7. The shifter assembly of claim 5, wherein the electromechanical devices comprise electromechanical cam devices.

8. The shifter assembly of claim 2, wherein the upper predetermined speed threshold is an upper vehicle speed threshold and the lower predetermined speed threshold is a lower vehicle speed threshold.

9. The shifter assembly of claim 2, wherein the upper predetermined speed threshold is an upper engine speed threshold and the lower predetermined speed threshold is a lower engine speed threshold.

10. A system for preventing selection of gears of a manual transmission, the system comprising:

a shifter housing adapted to be positioned remote from the manual transmission in an interior of a vehicle;

a shift lever pivotably supported relative to the housing, the shift lever including a shift plane select member and a gear engagement member each adapted to be operably coupled to the manual transmission, the shift plane select member adapted to, upon movement of the shift lever in a first direction to a first and second gear shift plane, move to a shift plane position to facilitate the transmission shifting into first or second gear, and the gear engagement member adapted to, upon movement of the shift lever in a second direction along the first and second gear shift plane to a first gear position, shift the transmission into first gear;

a gear blockout positioned within the shifter housing; and

a controller configured to control the gear blockout to be selectively actuated to (i) block movement of the shift plane select member to the shift plane position thereby preventing the manual transmission from being shifted into first and second gears, and (ii) block movement of the gear engagement member to the first gear position thereby preventing the manual transmission from being shifted into first gear.

11. The system of claim 10, wherein the controller is configured to selectively actuate the gear blockout based on:

(i) an upper predetermined speed threshold to block movement of the shift plane select member to the shift plane position thereby preventing the manual transmission from being shifted into first and second gears, and (ii) a lower predetermined speed threshold less than the upper predetermined threshold to block movement of the gear engagement member to the first gear position while allowing movement to a second gear position thereby preventing the manual transmission from being shifted into first gear.

12. The shifter assembly of claim 11, wherein the gear blockout includes a shift plane blockout device and a gear engagement blockout device;

and

wherein the controller is configured to;

(i) selectively actuate the shift plane blockout device at the upper predetermined speed threshold to block the movement of the shift plane select member to the shift plane position, and (ii) selectively actuate gear engagement blockout device at the lower predetermined speed threshold to block the movement of the gear engagement member to the first gear position while allowing movement to the second gear position.

13. The shifter assembly of claim 12, wherein controller is configured to, at the lower predetermined speed threshold, selectively actuate the gear engagement blockout device while controlling the shift plane blockout device to be deactuated thereby permitting the shift lever to move to the first and second gear shift plane and the shift plane select member to move to the shift plane position and permitting the shift lever to move to the second gear position while preventing the shift lever from moving to the first gear position.

14. The shifter assembly of claim 12, wherein the shift plane and gear engagement blockout devices comprise electromechanical devices.

15. The shifter assembly of claim 14, wherein the electromechanical devices comprise solenoid devices or electromechanical cam devices.

16. The shifter assembly of claim 11, wherein the upper predetermined speed threshold is an upper vehicle speed threshold and the lower predetermined threshold is a lower vehicle speed threshold.

17. The shifter assembly of claim 11, wherein the lower predetermined speed threshold is an upper engine speed threshold and the lower predetermined speed threshold is a lower engine speed threshold.

18. The shifter assembly of claim 11, wherein the controller is configured to selectively actuate the gear blockout based on:

(i) the upper predetermined speed threshold and a signal from a clutch position sensor or a shift lever position sensor indicative of an upcoming transmission shift, and (ii) the lower predetermined speed threshold less than the upper predetermined threshold and the signal from the clutch position sensor or the shift lever position sensor indicative of an upcoming transmission shift.