Patent ID: 9665996
Date: 2017-05-30
CPC Classifications: B60T,F02D,F02N,G07C,Y02T

Claim:
1. A negative pressure abnormality detection apparatus comprising: a negative pressure sensor that outputs a signal corresponding to a negative pressure that a negative pressure generation part generates through rotation of an internal combustion engine, the negative pressure assisting a vehicle driver's tread operation onto a brake pedal; a negative pressure detection part that detects the negative pressure based on the signal that is output by the negative pressure sensor; and an abnormality determination part that determines, during a period of time when a stopped state of the internal combustion engine is being continued, that the negative pressure sensor is in an abnormal condition if the negative pressure detected by the negative pressure detection part is out of a normal range near an atmospheric pressure to a vacuum pressure side under the condition where: