Method of controlling a torque transmission system and torque transmission system for carrying out the method of controlling

• US 20020134637A1
• Filed: 04/12/2002
• Published: 09/26/2002
• Est. Priority Date: 02/23/1994
• Status: Abandoned Application

• Current Assignee: Luk Getriebe-Systeme GmbH (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Luk Getriebe-Systeme GmbH (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Wagner, Uwe, Muller, Bruno, Wagner, Alfons, Rauser, Martin, Reuschel, Michael, Salecker, Michael
• Application Number:
  US10/121,234
• Publication Number:
  US 20020134637A1
• Time in Patent Office: Days
• US Class Current: 192/54.1
• CPC Class Codes: B60K 28/165 acting on elements of the vehicle drive train other than the propulsion unit and brakes, e.g. transmission, clutch, differential acting on brakes B60T8/17
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/101 Infinitely variable gearings
• CPC Class Codes: B60W 2050/0011 Proportional Integral Differential [PID] controller
• CPC Class Codes: B60W 2050/0031 Mathematical model of the vehicle
• CPC Class Codes: B60W 2050/0042 Transfer function lag; delays
• CPC Class Codes: B60W 2050/0052 Filtering, filters
• CPC Class Codes: B60W 2050/021 Means for detecting failure or malfunction
• CPC Class Codes: B60W 2510/0241 Clutch slip, i.e. difference between input and output speeds
• CPC Class Codes: B60W 2510/0623 Fuel flow rate
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2510/0657 Engine torque
• CPC Class Codes: B60W 2510/0671 Engine manifold pressure
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/025 Clutch slip, i.e. difference between input and output speeds
• CPC Class Codes: B60W 2710/027 Clutch torque
• CPC Class Codes: B60W 2710/105 Output torque
• CPC Class Codes: B60W 30/18 Propelling the vehicle
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: F16D 2500/1024 combined with hydraulic actuation
• CPC Class Codes: F16D 2500/1085 : Automatic transmission
• CPC Class Codes: F16D 2500/3056 : Cooling oil temperature
• CPC Class Codes: F16D 2500/306 : from the engine
• CPC Class Codes: F16D 2500/308 : from the transmission
• CPC Class Codes: F16D 2500/3144 : Accelerator pedal position
• CPC Class Codes: F16D 2500/3161 : Signal providing information about the state of engine accessories
• CPC Class Codes: F16D 2500/70217 : Pressure
• CPC Class Codes: F16D 2500/7041 : Position
• CPC Class Codes: F16D 2500/70426 : Clutch slip
• CPC Class Codes: F16D 2500/70434 : Input shaft torque
• CPC Class Codes: F16D 2500/7044 : Output shaft torque
• CPC Class Codes: F16D 2500/70615 : PI control
• CPC Class Codes: F16D 2500/70626 : PID control
• CPC Class Codes: F16D 48/06 : Control by electric or electronic means, e.g. of fluid pressure
• CPC Class Codes: F16D 48/064 : Control of electrically or electromagnetically actuated clutches F16D48/062, F16D48/068 take precedence
• CPC Class Codes: F16D 48/066 : Control of fluid pressure, e.g. using an accumulator F16D48/062, F16D48/068 take precedence
• CPC Class Codes: F16D 48/068 : using signals from a manually actuated gearshift linkage
• CPC Class Codes: F16H 2059/385 : Turbine speed
• CPC Class Codes: F16H 2061/0015 : Transmission control for optimising fuel consumptions
• CPC Class Codes: F16H 2061/0087 : Adaptive control, e.g. the control parameters adapted by learning
• CPC Class Codes: F16H 2061/145 : for controlling slip, e.g. approaching target slip value
• CPC Class Codes: F16H 45/02 : with mechanical clutches for bridging a fluid gearing of the hydrokinetic type control of torque converter lock-up clutches F16H61/14
• CPC Class Codes: F16H 59/0217 : with electric switches or sensors not for gear or range selection, e.g. for controlling auxiliary devices for gear selection F16H59/044; for range selection F16H59/105
• CPC Class Codes: F16H 59/044 : consisting of electrical switches or sensors range selectors with electric switches or sensors F16H59/105
• CPC Class Codes: F16H 59/14 : Inputs being a function of torque or torque demand
• CPC Class Codes: F16H 59/36 : Inputs being a function of speed
• CPC Class Codes: F16H 61/12 : Detecting malfunction or potential malfunction, e.g. fail safe in control of hydrostatic gearing F16H61/4192; Circumventing or fixing failures
• CPC Class Codes: F16H 61/143 : using electric control means
• CPC Class Codes: F16H 61/66 : specially adapted for continuously variable gearings control of exclusively fluid gearing F16H61/38
• CPC Class Codes: F16H 61/662 : with endless flexible members
• CPC Class Codes: F16H 61/664 : Friction gearings
• CPC Class Codes: F16H 63/46 : Signals to a clutch outside the gearbox
• CPC Class Codes: Y02T 10/40 : Engine management systems

Abstract

A method of monitoring a torque transmission system with a manually switchable gearbox in the power train of a motor vehicle involves the utilization of at least one sensor unit at the input side of the torque transmission system to ascertain relevant positions of the shift lever of the gearbox and the driving torque of the engine of the motor vehicle. The thus obtained shift lever signals are memorized, together with comparison signals which are obtained as a result of filtering of the shift lever signals, and various characteristics of such signals are recognized and identified to indicate the intention of the operator of the vehicle regarding the switching of the gearbox. The thus obtained switching intention signals are transmitted to a controlled clutch operating system.

Claims

1. A torque transmission system for transmitting torque from an input side to an output side of a drive train of a motor vehicle having an engine and a cone pulley gearbox, the torque transmission system comprising:

at least one component adapted to transmit torque, wherein the torque transmission system is controlled in such a way that the torque which can be transmitted by the torque transmission system is always less than the torque which can be transmitted by the cone pulley gearbox.

2. The torque transmission system according to claim 1, wherein the cone pulley gearbox comprises:

a variator assembled of two pairs of cone pulley sets;

an endless torque transmitting device; and

a control system, which regulates the contact pressure of the endless torque transmitting device between the pairs of cone pulley sets.

3. The torque transmission system according to claim 1, wherein the at least one component comprises at least one clutch a torque-flow path before or after the cone pulley gearbox.

4. The torque transmission system according to claim 1, wherein the torque transmission is controlled to prevent rotary oscillations originating from the engine and causing an excessive contact pressure to be exerted on the endless drive.

5. The torque transmission system according to claim 2, wherein the torque transmission system is controlled to protect the variator from torque surges at the output side.

6. The torque transmission system according to claim 1, wherein the at least one component comprises a discrete safety clutch.

7. The torque transmission system according to claim 1, wherein the at least one component comprises a lockup clutch of a torque converter.

8. The torque transmission system according to claim 1, wherein the at least one component comprises a clutch of a turning set.

9. The torque transmission system according to claim 2, wherein said torque transmission system has an additional clutch for adjusting the variator.

10. A torque transmission system for transmitting torque from an input side to an output side of a drive train of a motor vehicle having an engine and a cone pulley gearbox, the torque transmission system comprising:

at least one clutch for transmitting torque, wherein the at least one clutch is controlled in such a way that the torque which can be transmitted by the torque transmission system is always less than the torque which can be transmitted by the cone pulley gearbox.

11. The torque transmission system according to claim 10, wherein the cone pulley gearbox comprises:

a variator assembled of two pairs of cone pulley sets;

an endless torque transmitting device; and

a control system, which regulates the contact pressure of the endless torque transmitting device between the pairs of cone pulley sets.

12. The torque transmission system according to claim 10, wherein the at least one clutch is selected from the group consisting of a discrete safety clutch;

a lockup clutch of a torque converter, and a clutch of a turning set.

13. The torque transmission system according to claim 10, wherein said torque transmission system includes an additional clutch for adjusting the variator.