Control system and method for a power delivery system having a continuously variable ratio transmission

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865076

Frank, Andrew A ^[1]

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1. 1034 Hillside Ave., Madison, WI 53705

A control system and method for a power delivery system, such as in an automotive vehicle, having an engine coupled to a continuously variable ratio transmission (CVT). Totally independent control of engine and transmission enable the engine to precisely follow a desired operating characteristic, such as the ideal operating line for minimum fuel consumption. CVT ratio is controlled as a function of commanded power or torque and measured load, while engine fuel requirements (e.g., throttle position) are strictly a function of measured engine speed. Fuel requirements are therefore precisely adjusted in accordance with the ideal characteristic for any load placed on the engine.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Frank, Andrew A. (1034 Hillside Ave., Madison, WI 53705)
• Patent Number(s): US 4458561
• OSTI ID: 865076
• Country of Publication: United States
• Language: English

Related Subjects

control
method
power
delivery
continuously
variable
ratio
transmission
automotive
vehicle
engine
coupled
cvt
totally
independent
enable
precisely
follow
desired
operating
characteristic
ideal
line
minimum
fuel
consumption
controlled
function
commanded
torque
measured
load
requirements
throttle
position
strictly
speed
adjusted
accordance
placed
ratio transmission
automotive vehicle
variable ratio
continuously variable
commanded power
engine speed
fuel consumption
independent control
engine coupled
operating characteristic
power delivery
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