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Transmission-Torque Control for Gear Shifting with Engine Control
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English
Abstract
By using engine controlled gear shifting, a manual transmission can be automated without using the clutch during the shift event.
The main contribution of this paper is a novel extension of the existing system using active handling of driveline resonances. The strategy is based on a model of the transmission torque, which is derived by using experimental data from a heavy truck. A key step is the design of a criterion for a controller that drives the transmission torque to zero with damped resonances and with a control signal realizable by the engine.
The proposed solution offers a possibility to optimize the time needed for a gear shift, which is important since the vehicle is free rolling when in gear-shift condition. Furthermore, neutral gear can successfully be engaged also when facing initial driveline oscillations and load disturbances.
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Authors
Citation
Pettersson, M., Nielsen, L., and Hedström, L., "Transmission-Torque Control for Gear Shifting with Engine Control," SAE Technical Paper 970864, 1997, https://doi.org/10.4271/970864.Also In
References
- Maciejowski Jan Marian Multivariable Feedback Design Addison-Wesley 1989
- Nordgård Knut Hoonhorst Hans Developments in automated clutch management systems SAE Paper 950896 1995
- Orehall Lars Scania opticruise: Mechanical gearchanging with engine control Truck and Commercial Vehicle International '95 1995
- Pettersson Magnus Driveline modeling and principles for speed control and gear-shift control 91-7871-744-2 1996
- Pettersson Magnus Nielsen Lars Sensor placement for driveline control Preprint of the IFAC-Workshop on Advances in Automotive Control Ascona, Switzerland 1995