Ammonia burning internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsRyo Michikawauchi, Yasushi Ito, Kazuki Iwatani, Shiro Tanno
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Abstract
An ammonia burning internal combustion engine can feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber. When the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the operating parameters of the internal combustion engine are controlled so the air-fuel mixture fed into the combustion chamber is made easier to burn. As a result, an ammonia burning internal combustion engine designed to suppress a drop in combustibility of auxiliary fuel due to ammonia, can be provided.
Claims13
An ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber,
- wherein when the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, operating parameters of the internal combustion engine are controlled so that the temperature of the intake gas in the combustion chamber when a piston is at compression top dead center becomes higher.
An ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber, comprising:
- an EGR mechanism feeding part of the exhaust gas as EGR gas to the combustion chamber again,
- wherein when the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the EGR mechanism is controlled so that the ratio of the EGR gas in the intake gas fed into the combustion chamber is decreased.
An ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber, comprising:
- an air flow control system controlling turbulence of the air flow in the combustion chamber,
- wherein when the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the air flow control system is controlled so that the turbulence of the air flow occurring in the air-fuel mixture in the combustion chamber is made greater.
An ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber, comprising:
- a highly combustible substance injector injecting the highly combustible substance directly into the combustion chamber,
- wherein when the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the injection pressure of the highly combustible substance from the highly combustible substance injector is made higher.
An ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber, wherein at the time of normal operation of the engine, the air-fuel ratio of the air-fuel mixture fed into the combustion chamber is made lean and, when the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the air amount fed into the combustion chamber is controlled so that the air-fuel ratio of the air-fuel mixture fed into the combustion chamber is made to approach the stoichiometric air-fuel ratio.
A compression ignition type ammonia burning internal combustion engine able to feed ammonia and a highly combustible substance burning easier than ammonia, to a combustion chamber, comprising:
- an ammonia injector directly injecting ammonia into the combustion chamber and a highly combustible substance injector directly injecting the highly combustible substance into the combustion chamber,
- wherein the highly combustible substance is injected before the ammonia, and the ammonia is injected after the highly combustible substance self ignites.
Dependencies are inferred from the claim text.