Claims
- 1. A process for treatment of variator slip in a continuously variable automatic transmission, the process comprising the steps of, upon detection of variator slip, increasing a characteristic field (1) of a slip meter according to a ratio value (iv) of a variator and to an engine torque (M_mot) of a prime mover and simultaneously an evaluated slip meter (2) of an evaluation module (3), likewise according to the ratio value (iv) of the variator and to the engine torque (M_mot), is increased, assessing the variator slip according to a duration and an intensity by the evaluation module (3), and increasing a characteristic field (4) of a slip status meter connected with said evaluated slip meter (2) together with said evaluated slip meter (2), passing a signal to an error memory (5) in such a manner that, with the entry of an error, the slip, an evaluated slip and a slip-status meter are entered in said error memory (5) as environmental conditions and, depending on the characteristic field (4) of the slip-status meter, a contact pressure security of said variator is locally varied as a function of the variator ratio (iv) and the engine torque (M_mot), and deleting the error entry by deletion of the error memory (5), and said characteristic field (4) of said slip status meter being deleted independently and separately of said error memory.
- 2. The process according to claim 1, further comprising the step of locally decreasing the characteristic field (4) of the slip-status meter once a desired behavior of the transmission is achieved.
- 3. The process according to claim 1, further comprising the step of testing whether a whole contact pressure security of the variator exceeds a specific level and, if the contact pressure security of the variator exceeds the specific level, entering a second error information in said error memory (5) and allowing a system to react with a substitute function in order to protect the system.
Priority Claims (1)
Number |
Date |
Country |
Kind |
199 37 472 |
Aug 1999 |
DE |
|
Parent Case Info
The invention concerns a process for variator slip control in continuously variable automatic transmissions.
US Referenced Citations (9)
Foreign Referenced Citations (3)
Number |
Date |
Country |
44 11 628 |
Oct 1995 |
DE |
195 05 561 |
Aug 1996 |
DE |
404064760 |
Feb 1992 |
JP |