Patent ID: 9664078
Date: 2017-05-30
CPC Classifications: F01M,F02D,F02M,Y02T

Claim:
1. A PCV channel disconnect detection device for an internal combustion engine having a crankcase, an intake system for delivering metered air to the internal combustion engine and including a low vacuum pre-throttle portion and a high vacuum post-throttle portion, a PCV system, and an engine diagnostic system, the PCV channel disconnect detection device comprising: a PCV channel configured to contain PCV gas flow between the crankcase and the pre-throttle portion of the intake system and having a first end connectable to the crankcase and a second end connectable to the pre-throttle portion of the intake system and a detection channel that supplies unmetered air surrounding one of the ends of the PCV channel to the post-throttle portion of the intake system; wherein the detection channel is configured to be inoperable in response to the vacuum in the post-throttle portion of the intake system when the one of the ends of the PCV channel is connected; and wherein the detection channel is configured to be operable in response to the vacuum in the post-throttle portion of the intake system when the one of the ends of the PCV channel is disconnected such that sufficient unmetered air is supplied to the post-throttle portion of the intake system to be detected by the engine diagnostic system.