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

Patent · Sat Dec 31 23:00:00 EST 1983

OSTI ID:865076

Frank, Andrew A ^[1]

---

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
• 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

/477/
accordance
adjusted
automotive
automotive vehicle
characteristic
commanded
commanded power
consumption
continuously
continuously variable
control
controlled
coupled
cvt
delivery
desired
enable
engine
engine coupled
engine speed
follow
fuel
fuel consumption
function
ideal
independent
independent control
line
load
measured
method
minimum
operating
operating characteristic
placed
position
power
power delivery
precisely
ratio
ratio transmission
requirements
speed
strictly
throttle
torque
totally
transmission
variable
variable ratio
vehicle