Internal combustion engine with fuels being mixed and ignited on the spot and control method thereof

An internal combustion engine and fuel technology, which is used in fuel injection control, engine control, electrical control, etc., and can solve problems such as easy knocking, narrow operating conditions, and easy fire.

Active Publication Date: 2010-02-17
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems of difficult control of ignition timing, easy fire at low load, easy detonation at high load, and narrow operating conditions, s

Method used

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  • Internal combustion engine with fuels being mixed and ignited on the spot and control method thereof

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Experimental program
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Embodiment Construction

[0028] This embodiment has done following experiment to various working conditions:

[0029] The experimental internal combustion engine is an in-line 4-cylinder 1.6L EFI gasoline engine, according to figure 1 Shown is an ignition engine retrofitted to high cetane and high octane fuel field mix. The high cetane number fuel used in the experiment is dimethyl ether (C 2 h 6 O), the high-octane fuel is propane (C 3 h 8 ). Use a Horiba-7100DEGR emission analyzer produced by Horiba Co., Ltd. to measure HC, CO and NO in each operating condition of the internal combustion engine x emission.

[0030] 1) Start experiment

[0031] The mixed fuel electronic control unit 8 according to the cooling water temperature T w Determine the mix ratio for high cetane and high octane fuels. The electronic control unit 8 drives the high-octane number fuel nozzle 13 to inject the high-octane number fuel and the high cetane number fuel nozzle 14 with the fuel injection quantity of 0.007g / cycl...

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PUM

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Abstract

The invention provides an internal combustion engine with fuels being mixed and ignited on the spot and a control method thereof, in particular preparation, feeding and combustion control of fuels ofa combustion engine. A set of high-cetane and high-octane fuel feed and control system is additionally arranged in the internal combustion engine, and the system comprises a mixed fuel electronic control unit (8), a high-octane fuel box (9), a high-octane fuel pressure regulator (10), a high-octane fuel nozzle (13), a high-cetane fuel nozzle (14), a high-cetane fuel pressure regulator (17) and a high-cetane fuel box (18); and by controlling the high-octane flue nozzle, the high-cetane fuel nozzle and an ignition module, the spot mixing, the mixing ratio control, the excess air coefficient control and the ignition control of high-octane fuel and high-cetane fuel are achieved. The invention avoids accidental fire of the traditional single-fuel spark-ignition internal combustion engine in a cold starting process, improves the idling performance and the intermediate-speed and high-speed performance of the internal combustion engine effectively, and achieves the aims of energy saving and emission reduction of all working conditions of the internal combustion engine.

Description

technical field [0001] The invention provides an on-site fuel mixing ignition internal combustion engine and a control method thereof, in particular to fuel preparation, supply and combustion control of a combustion internal combustion engine. Background technique [0002] Since the 1970s, with the widespread application of electronic technology and exhaust gas after-treatment technology, the fuel consumption and harmful emissions of internal combustion engines have been greatly reduced. The traditional gasoline engine belongs to premixed homogeneous combustion. Due to the limitation of many factors such as knocking, the compression ratio is low and the thermal efficiency is low. The use of electronic control and exhaust after-treatment devices can make the gasoline engine achieve extremely low emissions. Compared with gasoline engines, diesel engines have higher compression ratio, higher thermal efficiency and superior fuel economy. However, the combustion of traditional di...

Claims

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Application Information

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IPC IPC(8): F02D41/04F02D43/00F02D19/08
Inventor 纪常伟
Owner BEIJING UNIV OF TECH
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