Electro-mechanical automatic transmission having a hill holder function

• US 6,021,880 A
• Filed: 09/15/1998
• Issued: 02/08/2000
• Est. Priority Date: 09/15/1998
• Status: Expired due to Term

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Chrysler Corporation (Stellantis NV)
• Inventors: Carriere, Donald L., Reed, Richard G. Jr.
• Primary Examiner(s): Ta, Khoi Q.
• Application Number:
  US09/153,173
• Time in Patent Office: 511 Days
• Field of Search: 192/219.3, 74/335, 477/195
• US Class Current: 192/219.3
• CPC Class Codes: B60K 17/26 characterised by arrangement, location, of type of freewheel device
• CPC Class Codes: F16H 3/006 power being selectively transmitted by either one of the parallel flow paths
• CPC Class Codes: F16H 63/30 Constructional features of the final output mechanisms
• CPC Class Codes: Y10T 74/19251 Control mechanism

Abstract

A transmission is provided with a hill holder device including an overrunning one-way clutch mounted on a driveshaft of the transmission for selective engagement by a transmission controller in order to prevent the vehicle from rolling backward on a hill.

Claims

1. A transmission for use with a vehicle, comprising:

a housing;

a driveshaft supported within said housing and having a plurality of drive gears rotatably mounted thereon for selective engagement with said driveshaft;

a driven shaft supported within said housing in parallel to said drive shaft and including a plurality of driven gears fixedly mounted to said driven shaft in meshing engagement with corresponding ones of said drive gears mounted to said driveshaft;

synchronizer means for selectively engaging said plurality of drive gears with said driveshaft; and

a hill holder device including an overrunning one-way clutch mechanism mounted on said driveshaft and engagable by said synchronizer means.

2. The transmission according to claim 1, further comprising a friction clutch device for transmitting torque from an engine to said driveshaft.

3. The transmission according to claim 2, wherein said hill holder device is engaged along with a drive gear in order to prevent a vehicle from rolling backward when the vehicle is on a hill.

4. An electro-mechanically controlled automatic transmission, comprising:

a housing;

a first driveshaft supported within said housing and having a plurality of drive gears rotatably mounted thereon for selective engagement with said first driveshaft;

a second drive shaft concentric with said first drive shaft and having a plurality of drive gears rotatably mounted thereon for selective engagement with said second drive shaft;

a driven shaft supported within said housing in parallel to said first and second drive shafts and including a plurality of driven gears fixedly mounted to said driven shaft in meshing engagement with corresponding ones of said drive gears mounted to said first and second drive shafts;

synchronizer means for selectively engaging said plurality of drive gears with said first and second drive shafts; and

a hill holder device including an overrunning one-way clutch mechanism mounted on said second drive shaft and engagable by said synchronizer means, said hill holder device being engaged along with a drive gear in order to prevent a vehicle from rolling backward when the vehicle is on a hill.