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Control system for multiple-fuel internal combustion engine

A control system, a technology for an internal combustion engine, applied in the directions of fuel injection control, engine control, internal combustion piston engine, etc., can solve problems such as restrictions, and achieve the effect of suppressing the occurrence of misfire

Inactive Publication Date: 2014-04-23
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the amount of main fuel injected into the cylinder is limited to prevent knocking

Method used

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  • Control system for multiple-fuel internal combustion engine
  • Control system for multiple-fuel internal combustion engine
  • Control system for multiple-fuel internal combustion engine

Examples

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Effect test

Embodiment 1

[0033] [Summary structure]

[0034] figure 1 It is a diagram showing a schematic configuration of an internal combustion engine, its fuel system, and an intake and exhaust system according to the present embodiment. The internal combustion engine 1 is an engine for driving a vehicle that can use light oil and compressed natural gas (hereinafter referred to as CNG) as fuel. The internal combustion engine 1 is a compression ignition type engine. The internal combustion engine 1 can be operated by combusting light oil and CNG, and can also be operated by burning only light oil. In addition, in this example, light oil corresponds to the liquid fuel according to the present invention, and CNG corresponds to the gaseous fuel according to the present invention.

[0035] Internal combustion engine 1 has four cylinders 2 . An intake port 4 and an exhaust port (not shown) are connected to an upper combustion chamber in the cylinder 2 . The opening of the intake port 4 to the combus...

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PUM

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Abstract

The purpose of the present invention is to prevent misfire from occurring and the exhaust amount of HC from increasing in a compression ignition type multiple-fuel internal combustion engine in which a liquid fuel capable of compression self-ignition and a gas fuel less ignitable than the liquid fuel are used as fuels. According to the present invention, under identical driving conditions, when the liquid fuel and the gas fuel are combusted using the liquid fuel as an ignition source, the equivalent ratio of an air-fuel mixture in a cylinder is increased as compared with when only the liquid fuel is combusted. In addition, when an engine load is low and when engine rotational speed is low, the increasing rate of the equivalent ratio with respect to when only the liquid fuel is combusted is decreased as compared with when the engine load is high and when the engine rotational speed is high, respectively.

Description

technical field [0001] The present invention relates to a control system of a compression-ignition multi-fuel internal combustion engine capable of mixed combustion of various fuels. Background technique [0002] Conventionally, a multi-fuel internal combustion engine capable of mixed combustion of various fuels such as liquid fuel (for example, light oil, gasoline, etc.) and gaseous fuel (for example, compressed natural gas, hydrogen, etc.) has been developed. [0003] For example, Patent Document 1 discloses a compression ignition type internal combustion engine that uses gaseous fuel such as natural gas, propane, biogas, landfill gas, or hydrogen as the main fuel, and is easier to use than the main fuel. Pyrophoric diesel fuel or dimethyl ether is used as pilot fuel. In the compression ignition type internal combustion engine described in Patent Document 1, main fuel is injected into the cylinder at the beginning of an intake stroke or a compression stroke, and a premixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/08F02D41/30
CPCF02D19/024F02D19/0647F02D2200/0611F02D41/30F02D41/0027Y02T10/32Y02T10/18F02D19/081F02D19/0692F02D41/0025F02D41/1475F02D2200/101F02D2200/1015F02D13/0238Y02T10/12Y02T10/30F02D41/403
Inventor 增渕匡彦
Owner TOYOTA JIDOSHA KK
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