New engine controls have been developed for the turbocharged Lexus NX200t to improve driving power by reducing engine torque output lag. Drive power management functions have been centralized in an integrated drive power control system. The newly developed controls minimize the potential reduction in drivability associated with the adoption of a turbocharged engine while improving fuel efficiency.General driveability issues commonly associated with a turbocharged engine include sudden increases in drive power due to the response lag of the turbocharger, and higher shifting frequencies if this response lag triggers a disturbed accelerator operation pattern by the driver. The developed technologies detect and control sudden increases in drive power to create the optimum drive power map, and reduce unnecessary shifts even if the driver's accelerator operation is disturbed.This paper describes an outline of the integrated drive power control system and its representative technologies, which helped to ensure the product appeal of the Lexus NX200t.
Toyota's Integrated Drive Power Control System for Downsized Turbocharged Engine
Sae Int. J. Engines
SAE 2015 World Congress & Exhibition ; 2015
Sae International Journal of Engines ; 8 , 4 ; 1687-1691
2015-04-14
5 pages
Conference paper
English
Toyota's Integrated Drive Power Control System for Downsized Turbocharged Engine
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