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

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.
Inventors:
 [1]
  1. (1034 Hillside Ave., Madison, WI 53705)
Issue Date:
OSTI Identifier:
865076
Assignee:
Frank, Andrew A. (1034 Hillside Ave., Madison, WI 53705) LLNL
Patent Number(s):
US 4458561
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
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; /477/