Engine system

Abstract

[Problem] To prevent an abnormality of an engine that may occur due to switching from a first fuel to a second fuel. [Solution] The engine system 100 includes an engine 1 that is capable of switching between a first mode in which a first fuel is combusted and a second mode in which at least a second fuel out of the first fuel and the second fuel is combusted, a first fuel supplier 6 that supplies the first fuel to the engine 1, a second fuel injection device 43 that supplies the second fuel to the engine 1, an air-fuel ratio controller 23 that controls the air-fuel ratio, a controller 7 that controls the first fuel supplier 6, the second fuel injection device 43, and the air-fuel ratio controller 23, and an acceptor 92 that accepts an instruction for the controller 7. When the acceptor 92 accepts an instruction for transition from the first mode to the second mode, the controller 7 executes self-diagnosis of at least one of the first fuel supplier 6, the second fuel injection device 43, and the air-fuel ratio controller 23 while maintaining the operation in the first mode, and determines whether to transition to the second mode based on a result of the self-diagnosis.

Dependencies are inferred from the claim text.