System for utilizing the negative torque of a power delivery system having a continuously variable ratio transmission for braking
A system is described for controlling the operation of a power delivery system including an engine of an engine-driven vehicle and a continuously variable ratio transmission coupled to the engine for delivering power from the engine to an output shaft. The engine has fuel delivery means for delivering a variable quantity of fuel thereto. The power delivery system is controlled by command means for commanding a desired power delivery system performance. The system comprises: actual system performance measuring means for measuring the actual performance of the power delivery system; ratio control means operatively coupled to the command means and the actual system performance measuring means for controlling the ratio of the transmission as a function of the desired system performance commanded by the command means and the measured actual system performance; fuel function means defining a desired fuel requirement for the engine in relation to engine operating speed; speed measuring means for measuring the speed of the engine; fuel control means operatively coupled to the fuel function means and the fuel delivery means for controlling the fuel delivery means only in accordance with the fuel requirement defined by the fuel function means, so that the fuel delivered to the engine is determined only by the speed thereof; and fuel cutting means, separate from the fuel control means, for cutting fuel flow to the fuel delivery means below that required by the fuel function means when the system performance commanded by the command means is reduced wherein after the fuel flow is cut, the fuel control means is controlled to increase the negative torque of the system.
- Assignee:
- Aisin Seiki Kabushiki Kaisha
- Patent Number(s):
- US 4700590
- OSTI ID:
- 5853471
- Resource Relation:
- Patent File Date: Filed date 30 Sep 1985
- Country of Publication:
- United States
- Language:
- English
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