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Torqueboost CamInCam~New Concept for Optimizing Transient Torque Response and Fuel Economy of Turbocharged Gasoline Engines
Technical Paper
2010-08-0215
Sector:
Event:
JSAE Spring Conference
Language:
Japanese
Abstract
This paper shows the torque characteristic benefits from the combination of a continuously variable exhaust valve train with single stage turbocharging. The variable exhaust cam duration is realized by a simple and cost-effective CamInCam (CIC) exhaust camshaft in a DOHC application. In comparison to the state-of-the-art technology for turbocharged gasoline engines, i.e., direct injection and dual independent cam phasing, the CIC functionality allows for significant stationary torque as well as transient torque response improvements. Despite this torque improvement by using the CIC technology the specific output of 90 kW/l can be maintained at a similar fuel consumption.