NEGATIVE PRESSURE ABNORMALITY DETECTION APPARATUS AND CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

摘要

A negative pressure detection part detects a negative pressure from a signal of a negative pressure sensor detecting a negative pressure generated due to rotation of an internal combustion engine. The negative pressure is used to assist a vehicle driver's braking operation. An abnormality determination part determines, during continuation of the internal combustion engine stopped state, that the negative pressure sensor is in an abnormal condition if the detected negative pressure is out of a normal range near an atmospheric pressure to a vacuum pressure side when an operation of decreasing the negative pressure is performed on a brake pedal greater than or equal to a predetermined number of times or greater than or equal to a predetermined period of time or when a total operation amount of the decreasing operation is greater than or equal to a predetermined amount.

主权项

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 a negative pressure decreasing operation of decreasing the negative pressure has been performed on the brake pedal greater than or equal to a predetermined number of times or greater than or equal to a predetermined period of time or under the condition where a total operation amount of the negative pressure decreasing operation is greater than or equal to a predetermined amount.