Method and system for electronic simulation of a freewheel

US4231092A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ferdinand Grob · Besigheim, DE
• Friedrich Rabus · Schwieberdingen, DE

Key dates

• Filing date: Dec 4, 1978
• Grant date: Oct 28, 1980
• Expiry date: Dec 4, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2059/467
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

To simulate freewheel operation, that is to allow torque transmission in one direction only, the variation with respect to time of the torque transmitted by a friction coupling clutch or brake band) is computed and the coupling is released when the transmitted torque passes through zero. When the coupling is slipping, the time at which the torque passed through zero is taken to be the time at which the input and output speed of the coupling are the same. When a slipping and a fully engaged coupling are connected in parallel, the torque transmitted by the fully engaged coupling is computed from a set of equations utilizing only parameters sensed in any case in a standard drive system. Speed sensors and a torsiometer furnish signals required for the computations. Preferably, the computations are implemented by a microprocessor.