ON-BOARD METHOD TO SMOKE TEST A VEHICLE'S EVAP SYSTEM USING EXHAUST GAS

摘要

Systems and methods for smoke testing an evaporative emissions control system of a vehicle using exhaust gas are disclosed. In one example, a method for an engine comprises: during a first condition, routing exhaust gas to a sealed fuel system; and pressurizing the fuel system with the exhaust gas such that exhaust gas will escape from a leak in the fuel system. In this way, the location and the size of an evap system leak may be determined without the need for, and without using, expensive off-board testing equipment.

主权项

1. A method for an engine, comprising:
during a first condition, routing exhaust gas to a sealed fuel system; and pressurizing the fuel system with the exhaust gas such that exhaust gas will escape from a leak in the fuel system.