Turbocharger operation to increase brake effectiveness
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United States of America Patent
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Mar 22, 2016
Grant Date -
Jul 31, 2014
app pub date -
Aug 25, 2011
filing date -
Aug 25, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
In response to activation of a compression release brake when a motor vehicle having a turbocharged internal combustion engine is operating at some elevation above sea level and a turbocharger compressor is operating in a region of an operating map which is creating boost air in an engine intake manifold which would cause the compression release brake to decelerate the vehicle more slowly at that elevation than it would at sea level for the same operating conditions of the vehicle and engine other than altitude, the compression release brake decelerates the vehicle less slowly by causing an exhaust gas recirculation system to reduce at least one of a) mass of exhaust diverted to an intake system of the engine and b) cooling of the diverted exhaust.
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