Transmission for four-wheel drive vehicles

Patent · Tue Jul 07 04:00:00 EDT 1987

OSTI ID:6041404

Furusawa, C; Ishiguro, T

An apparatus is described for controlling a transmission mechanism comprising a power transmission assembly for transmitting power from an engine as follows: an input member connected to an output side of the power transmission assembly; a first power train operatively connected to the input member and providing at least two different speed-change ratios; a second power train communicating with the first power train and including a dog clutch for cutting off and changing over power; a brake assembly for locking the input member, and a clutch assembly for operatively engaging and disengaging the input member with the first power train. The apparatus includes means for engaging the brake assembly in response to a signal indicative of changing-over of the second power train when the clutch assembly is in a disengaged state; the means for engaging the brake assembly includes a system for controlling the brake assembly and a clutch assembly, the system includes: (a) a shift position sensor for sensing the selected shift position of the first power train and providing a signal; (b) changing-over sensing means for sensing the changing-over action in the second power train and providing the signal indicative of changing-over of the second power train; and (c) a CPU receiving two input signals of the shift position sensor and the changing-over sensing means, and providing an output signal actuating the brake assembly.

• Assignee: Aisin Seiki Kabushiki Kaisha, Aichi
• Patent Number(s): US 4677879
• OSTI ID: 6041404
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
BRAKES
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
EQUIPMENT
MACHINE PARTS
MECHANICAL TRANSMISSIONS
OPERATION
SIGNALS
SPEED REGULATORS
VEHICLES
VELOCITY