Failure diagnosis device for exhaust brake
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United States of America Patent
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Aug 8, 2017
Grant Date -
Mar 24, 2016
app pub date -
Jul 8, 2014
filing date -
Jul 10, 2013
priority date (Note) -
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Abstract
On the basis of absolute values α and β of variations, before and after actuation of an exhaust brake, of fuel-injection and intake-air amounts, respectively, an exhaust brake is determined to normally operate when the absolute values α and β of the variations of the fuel-injection and intake-air amounts are not less than fuel-injection and intake-air variation thresholds, respectively; the exhaust brake is determined to have failure when the absolute values α and β of the variations of the fuel-injection and intake-air amounts are less than the fuel-injection and intake-air variation thresholds, respectively.
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