Microprocessor controlled system and method for reducing the fuel flow to the prime mover of a power delivery system having a continuously variable ratio transmission upon a commanded decrease in power delivery

Patent · Tue Apr 08 04:00:00 EST 1986

OSTI ID:5702192

Omitsu, T

This patent describes a system 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 which consists of: 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 and the measured actual system performance, the speed of the engine varying as a function of transmission ratio; 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, so that the fuel delivered to the engine is determined only by the speed thereof; and microprocessor controlled fuel cutting means, separate from the fuel control means. The fuel cutting means consists of: input means for inputting to the microprocessor first and second system performance commands, the microprocessor processing the first and second system performance commands to arrive at a change in commanded system performance; and fuel flow means for controlling the fuel flow to the fuel delivery means at a duty cycle which is inversely proportional to the change in commanded system performance.

• Assignee: Aisin Seiki Kabushiki Kaisha
• Patent Number(s): US 4580465
• OSTI ID: 5702192
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
PERFORMANCE
SHAFTS
SPEED REGULATORS
VEHICLES
VELOCITY