Engine device

Abstract

This engine device runs on a fuel containing a toxic substance. The engine device includes: an exhaust passage that causes an exhaust substance that is discharged from an engine, such as an exhaust gas or a blow-by gas, to flow through; a plurality of treatment devices having different functions that are disposed in the exhaust passage as devices that perform a treatment of the exhaust substance; and a path switching valve that is disposed in the exhaust passage, and switches, from among the plurality of treatment devices, to the treatment device that performs the treatment of the exhaust substance. The toxic substance contained in the fuel is ammonia or methanol. The engine device includes an external drive pump that causes a blow-by gas to flow through a blow-by path, and also includes, as the plurality of treatment devices, an exhaust purification catalyst device, an abatement device, and an intake return device.

Dependencies are inferred from the claim text.