US Patent No. 9,995,652

INDUCTION DIAGNOSTICS FOR SKIP FIRE ENGINES


Patent No. 9,995,652
Issue Date June 12, 2018
Title Induction Diagnostics For Skip Fire Engines
Inventorship Shikui Kevin Chen, San Jose, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 9,995,652

1. A method of detecting an induction fault in an internal combustion engine having an intake manifold that supplies air to at least one working chamber of the internal combustion engine, and an intake manifold pressure sensor configured to sense an air pressure within the intake manifold, the method comprising:obtaining a first pressure reading indicative of the intake manifold pressure at a time associated with a first working chamber air induction opportunity;
obtaining a second pressure reading indicative of the intake manifold pressure at a time associated with a second working chamber air induction opportunity that follows the first working chamber induction opportunity, the second air induction opportunity being the next air induction opportunity following the first air induction opportunity; and
determining whether an induction fault has occurred in association with the second air induction opportunity based at least in part on the first and second pressure readings.