公开(公告)号：US20170152813A1

公开(公告)日：2017-06-01

申请号：US15251709

申请日：2016-08-30

Applicant: GM Global Technology Operations LLC

Inventor： Martino CASETTI ,  Darrell W. BURLEIGH ,  Bruce A. CHURCH

IPC: F02M25/08 ,  B01D53/04 ,  F02D41/00 ,  F02D41/14 ,  F02D41/22 ,  G07C5/08

CPC classification number: F02M25/0809 ,  B01D53/0407 ,  B01D2257/7022 ,  B01D2259/4516 ,  F02D41/0032 ,  F02D41/1401 ,  F02D41/222 ,  F02D2041/1409 ,  F02D2041/141 ,  F02D2041/223 ,  G07C5/006 ,  G07C5/0808 ,  G07C5/0825 ,  Y02T10/40

Abstract: A fuel vapor system for a vehicle includes a fuel vapor canister that traps fuel vapor from a fuel tank of the vehicle. A purge valve opens to allow fuel vapor flow to an intake system of an engine and closes to prevent fuel vapor flow to the intake system of the engine. An electrical pump pumps fuel vapor from the fuel vapor canister to the purge valve. A diagnostic module (a) selectively diagnoses a fault in the fuel vapor system based on at least one of: (i) a speed of the electrical pump measured using a pump speed sensor; and (ii) a pressure at a location between the electrical pump and the purge valve, and (b) illuminates a malfunction indicator lamp (MIL) within a passenger cabin of the vehicle when the fault is diagnosed.