Multifuel internal-combustion engine

An internal combustion engine and multi-fuel technology, which is applied to liquid fuel feeders, internal combustion piston engines, combustion engines, etc., can solve the problems of increased PM and smoke generation, and achieve suppression of noise, suppression of thermal efficiency deterioration, and suppression of torque The effect of the change
CN102016275BInactive Publication Date: 2013-12-11TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2013-12-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

To improve an ignitability to a fuel having a low compressed ignitability in a combustion chamber (CC) in a compressed self-ignition diffusive combustion mode operation. In a multi-fuel internal combustion engine operated by introducing at least one type of fuel among at least two types of fuels (F1, F2) having different properties into a combustion chamber (CC) or introducing a mixed fuel composed of at least the two types of fuels (F1, F2) into the combustion chamber (CC), an electronic control unit (1) is provided with a fuel characteristics detection means that detects an ignitability index value as an index showing a compressed ignitability of a fuel itself introduced into the combustion chamber (CC), and a fuel injection control means that previously injects, when a compressed self-ignition diffusive combustion is performed using a fuel in the combustion chamber, which is determined to have a low compressed ignitability based on the ignitability index value, the fuel at a predetermined timing in a period from an intake stroke to a compression stroke, and thereafter mainly injects the fuel and introduces the fuel having the low compressed ignitability into the combustion chamber (CC).
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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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