Multifuel internal-combustion engine

An internal combustion engine, multi-fuel technology, applied in liquid fuel feeders, internal combustion piston engines, combustion engines, etc., can solve the problems of increased PM and soot generation, and achieve noise suppression, torque fluctuation suppression, NOx suppression The effect of increasing the amount of production
CN102016275AInactive Publication Date: 2011-04-13TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

A multifuel internal-combustion engine which improves the ignitability of low-compressed ignitable fuels inside a combustion chamber (CC) at the time of a compressed self ignition diffusive combustion mode of operation. The multifuel internal-combustion engine is operated in a manner that at least one of not less than two kinds of fuels (F1, F2) of different nature is guided into the combustion chamber (CC) or a mixed fuel composed of not less than two kinds of fuels (F1, F2) is guided into the combustion chamber (CC). An electronic controller unit (1) has a fuel characteristics detection means to detect a ignitability index value indexed for compressed ignitability of a fuel itself guided into the combustion chamber (CC), and a fuel injection control means to inject a fuel inside the combustion chamber (CC) which is judged to be low-compressed ignitable based on detected ignitability index value prior to a given time during a period from intake stroke to compression stroke at the time of the compressed self ignition diffusive combustion using such a fuel, and to guide a low-compressed ignitable fuel into the combustion chamber (CC) by subsequent main injection.
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Description

technical field

[0001] The present invention relates to a multi-fuel internal combustion engine. The multi-fuel internal combustion engine operates by introducing at least one fuel of at least two fuels with different properties into a combustion chamber, or introducing a mixed fuel composed of the at least two fuels into a combustion chamber. run. Background technique

[0002] In the past, a so-called multi-fuel internal combustion engine that operates on a plurality of fuels with different properties has been known. For example, in Patent Document 1 described below, a multi-fuel internal combustion engine is disclosed that injects low-octane fuel into a mixture of high-octane fuel injected by an intake pump to The self-ignition of the low-octane fuel serves as a starting point, and the flame-propagation combustion of the high-octane fuel mixture can thereby increase the combustion speed and shorten the time until the combustion is completed, so knocking can be prevented. ...

Claims

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