×

Crankcase integrity breach detection

  • US 9,714,590 B2
  • Filed: 04/19/2016
  • Issued: 07/25/2017
  • Est. Priority Date: 09/14/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method for an engine, comprising:

  • boosting intake air with a compressor;

    during engine cranking, while manifold airflow is lower than a threshold, increasing intake throttle opening of a throttle positioned downstream of the compressor; and

    indicating crankcase ventilation system degradation based on a transient dip in crankcase vent tube pressure estimated by a sensor positioned within a crankcase vent tube following the intake throttle opening, the crankcase vent tube coupled upstream of the compressor.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×