BorgWarner suggests Valve-Event Modulated Boost system can offer 6-17% fuel economy benefit over already downsized and turbocharged engines
Green Car Congress
MAY 9, 2012
The concentric camshaft features one set of lobes connected to the phaser sprocket, and a second set next to it is connected to phaser. Turbo boost can be controlled by changing the timing of the exhaust valves—no waste gate is required. The company also has demonstrated the potential to increase compression ratios by 1.5
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