Fuel on-site mixing and compressed ignition internal combustion engine and control method

An internal combustion engine and fuel technology, applied in engine control, electrical control, mechanical equipment, etc., can solve the problems of long intake air preheating time, difficult to popularize and use, and expensive technology.

Inactive Publication Date: 2008-07-09
BEIJING UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

High-pressure common rail, variable compression ratio, variable valve timing, intake air preheating and other technical means can effectively broaden the operating range of homogeneous premixed compression ignition engines, but high-pressure common rail, variable compression ratio, var

Method used

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  • Fuel on-site mixing and compressed ignition internal combustion engine and control method
  • Fuel on-site mixing and compressed ignition internal combustion engine and control method
  • Fuel on-site mixing and compressed ignition internal combustion engine and control method

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Embodiment Construction

[0049] This embodiment will be described in detail below in conjunction with the accompanying drawings.

[0050] As shown in Figure 1, this embodiment includes an internal combustion engine electronic control unit 1, a load sensor 2, an X58 gear 3, a crank angle sensor 4, a cylinder block 5, a cooling water jacket 6, a cooling water temperature sensor 7, a connecting rod 8, and a piston 9. Knock sensor 10, linear oxygen sensor 11, exhaust pipe 12, cylinder head 13, exhaust valve 14, exhaust cam 15, spark plug type cylinder pressure sensor 16, ignition coil and ignition module 17, charge amplifier 18, intake Valve 19, Camshaft Position Sensor 20, Intake Cam 21, High Octane Fuel Injector 22, High Octane Fuel Regulator 23, High Octane Fuel Tank 24, High Octane Fuel Pressure Regulator 25 , intake air temperature sensor 26, intake pipe 27, intake air pressure sensor 28, high cetane fuel pressure regulator 29, high cetane fuel tank 30, high cetane fuel regulator 31, high cetane Hex...

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Abstract

The invention provides a fuel field mixing compression ignition internal combustion engine and a control method thereof, in particular relates to fuel preparation, supply and combustion control of a combustion engine. The invention adopts a high-octane and high-cetane fuel field mixing and auxiliary ignition technology, and can meet the requirement that the internal combustion engine makes use of the fuel of different octane numbers under different loads, namely, more high-cetane fuel is mixed in the high-octane fuel under low load or ignition is assisted in, to improve the ignition property of the mixed fuel so that the mixed fuel can be fired reliably under low load and temperature with the firing time controllable. The quantity of high-cetane fuel to be mixed in is reduced under medium load; a signal high-octane fuel is adopted under large load to avoid engine detonation. By adopting the fuel field mixing compression ignition combustion mode, not only an even premixing compression ignition engine is prevented from being on fire under low load, but also the working condition range under large load can be widened. In addition, the power performance of the engine is improved. In this way, the even premixing compression ignition engine is practical.

Description

technical field [0001] The invention provides a fuel on-site mixed compression ignition internal combustion engine and a control method, in particular to fuel preparation, supply and combustion control of a 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 diesel engines is th...

Claims

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Application Information

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