Engine system
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsYoshitaka Takeuchi, Hidehito Kubo, Shohei Matsumoto, Norinosuke Nakatani
Life of this patent
Estimating the term…
Abstract
An engine system includes: an ammonia engine; a reforming device that has a reforming catalyst for cracking ammonia gas into hydrogen and configured to reform ammonia gas to generate reformed gas containing hydrogen; and a control unit. The control unit includes: a purge controller configured to control a reforming injector so as to be closed and control a reforming throttle valve so as to be opened, after an ignition switch gives an instruction of a stop of the ammonia engine; and an engine stop controller configured to control main injectors so as to be closed, after the ignition switch gives the instruction of the stop of the ammonia engine.
Claims11
An engine system comprising:
- an engine;
- an intake passage through which air to be supplied to the engine flows;
- a fuel injection valve configured to inject a fuel toward the engine;
- a first throttle valve disposed in the intake passage and configured to control a flow rate of the air to be supplied to the engine;
- a reformer that has a catalyst for cracking the fuel into hydrogen and configured to reform the fuel to generate reformed gas containing hydrogen;
- an air flow passage through which air to be supplied to the reformer flows;
- a fuel supply valve configured to supply the fuel to the reformer;
- a second throttle valve disposed in the air flow passage and configured to control a flow rate of the air to be supplied to the reformer;
- a reformed gas flow passage through which the reformed gas generated by the reformer flows toward the engine;
- a stop instruction processor configured to give an instruction of a stop of the engine;
- and
- a processor configured to control the fuel injection valve, the first throttle valve, the fuel supply valve, and the second throttle valve, wherein,
- the processor includes:
- a first processor configured to execute a first control process in which one of the fuel supply valve and the second throttle valve is closed, and the other one of the fuel supply valve and the second throttle valve is opened, after the stop instruction processor gives the instruction of the stop of the engine;
- and
- a second processor configured to execute a second control process in which the fuel injection valve is closed, after the stop instruction processor gives the instruction of the stop of the engine,
- a third processor configured to execute a fourth control process in which the fuel supply valve and the second throttle valve are controlled such that amounts of fuel and air to be supplied to the reformer are reduced, when the stop instruction processor gives the instruction of the stop of the engine, before each of the first processor and the second processor executes the first control process and the second control process, respectively.
Dependencies are inferred from the claim text.