GASEOUS FUEL SUPPLY DEVICE

摘要

To exert combustion control using a CNG injector, a first cutoff valve is opened. On condition that the first cutoff valve is opened, the presence or absence of fuel leakage in a high-pressure side path is determined based on a drop in a detected value of a pressure in the high-pressure side path (high-pressure side detected value PH). Inserting a nozzle for CNG filling into a filling opening causes a phenomenon where the high-pressure side detected value PH rises once and then drops. If the high-pressure side detected value PH rises at a specified rate or more, a CPU stops determination as to the presence or absence of a fuel leakage malfunction for a specified period of time.

主权项

1. A gaseous fuel supply device comprising:
a storage chamber storing gaseous fuel; an injector used for supplying the gaseous fuel to a combustion chamber of an internal combustion engine; a pressure detector that detects a pressure in a fuel supply path between the storage chamber and the injector; a malfunction detector that detects a malfunction based on a drop in the pressure detected by the pressure detector; a fail-safe implementing part that implements a fail-safe process if the malfunction detector detects a malfunction; and a stop processor that stops malfunction detection for implementing the fail-safe process for a specified period of time if the pressure is determined to rise at a specified rate or more.