System for engaging an electromagnetic clutch upon acceleration of an engine

Patent · Tue Jul 14 04:00:00 EDT 1987

OSTI ID:6340883

Sakakiyama, R

A system is described for controlling clutch torque for a vehicle having an engine, a transmission, and an electromagnetic clutch between the engine and the transmission. The clutch has a drive member and a member driven when the clutch is engaged automatically, completely disengaged when vehicle speed decreases below a predetermined value. The improvement comprises: means for controlling the clutch when accelerating the vehicle, after deceleration, from a low speed driving condition where the vehicle speed is below the predetermined value where the clutch is completely disengaged. The clutch remains completely disengaged until the controlling means completely engages the clutch when engine speed substantially equals speed of the driven member of the clutch, comprising: first means for determining engine speed; second means for determining the speed of the driven member of the electromagnetic clutch of a completely disengaged condition of the clutch; third means for detecting acceleration of the vehicle and producing an acceleration signal when the acceleration is detected; fourth means for comparing the engine speed with the speed of the driven member and producing an output when both the speeds substantially coincide with each other; and fifth means responsive to occurrence simultaneously of the acceleration signal and the output for completely engaging the electromagnetic clutch which is completely disengaged.

• Assignee: Fuji Jukogyo Kabushiki Kaisha, Tokyo, and Van Doorne's Transmissie B.V., Tilburg
• Patent Number(s): US 4679674
• OSTI ID: 6340883
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
ACCELERATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENGINES
EQUIPMENT
MACHINE PARTS
MAGNETS
MEASURING INSTRUMENTS
MECHANICAL TRANSMISSIONS
SPEED REGULATORS
TORQUE
VEHICLES
VELOCIMETERS
VELOCITY