Mazda Motor Corporation

Yusuke Higuchi

Daisuke Tanaka

Hidetoshi Hashimoto

Takayuki Kikuchi

Tomohiro Ueno

An anomaly determination device for an evaporated fuel processing device comprises: an evaporated fuel processing device () including a canister (), a purge passage () and a purge valve (); a first pressure sensor () and/or a second pressure sensor () for acquiring a purge downstream pressure, a third pressure sensor () for acquiring a canister internal pressure, and a PCM () that calculates a purge flow rate per unit time based on the purge downstream pressure and an opening degree of the purge valve (), and calculates an integrated purge flow rate by integrating the purge flow rate, so as to perform an anomaly determination for the evaporated fuel processing device () based on the canister internal pressure and the integrated purge flow rate. The PCM () uses the canister internal pressure when the integrated purge flow rate becomes a predetermined flow rate or more.

Anomaly determination device for evaporated fuel processing device

A PCM () performs a catalyst early warming control (AWS control) for accelerating warm-up of a catalytic device. When the catalytic device () is not in an activated state and a vehicle is traveling, the PCM () is configured to perform: a fuel injection control to inject fuel such that a homogeneous fuel-air mixture can be formed in a combustion chamber () of an engine () so as to generate a homogeneous combustion; an intake air amount control to increase intake air amount; and an ignition control to retard ignition timing from a reference ignition timing. In addition, the PCM () is configured to vary ignition timing retard amount corresponding to a difference between the ignition timing retarded by the ignition timing control and the reference ignition timing, in accordance with engine speed and/or engine load.

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Hiroshima, Japan

Yusuke Higuchi