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Model-based controller for auto-ignition optimization in a diesel engine

A diesel engine, self-ignition technology, applied in the direction of engine control, electrical control, machine/engine, etc., can solve the problems of engine deflagration, power loss, etc., and achieve the effect of reducing emissions

Inactive Publication Date: 2008-10-01
INT ENGINE INTPROP CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Premature self-ignition can have some undesirable consequences, such as potentially harmful engine knock
Late self-ignition can lead to power loss

Method used

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  • Model-based controller for auto-ignition optimization in a diesel engine
  • Model-based controller for auto-ignition optimization in a diesel engine
  • Model-based controller for auto-ignition optimization in a diesel engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] Figure 1 shows an exemplary internal combustion engine 10 embodying the principles of the present invention. The engine 10 includes an intake system 12 through which charge air for combustion enters the engine, and an exhaust system 14 through which exhaust gas generated by combustion exits the engine. Engine 10 operates on the compression ignition principle and is turbocharged by a turbocharger 16 having a turbine 16T located in exhaust system 14 and a compressor 16C located in intake system 12 . When the engine is used as a motive force for a motor vehicle, such as a truck, engine 10 may be coupled through transmission 18 to driven wheels that propel the vehicle.

[0040] Engine 10 includes a plurality of cylinders 20 (either in an in-line configuration or in a V-configuration) forming combustion chambers into which fuel injectors 22, which are elements of a fuel management system 23, inject fuel to contrast with the 12 incoming charge air mix. Pistons reciprocating...

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Abstract

A diesel engine (10) operates by alternative diesel combustion. Formation of fuel and charge air mixtures is controlled by processing a particular set of values for certain input data according to a predictor algorithm model (50) to develop data values for predicted time of auto-ignition thetaAI and resulting torque TQAI , and also develop data values for control of fuel and air that will produce the predicted time of auto-ignition thetaAI and resulting torque TQAI. The data values developed by the predictor algorithm and data values for at least some of the input data are processed according to a control algorithm (52) that compensates for any disturbance deltaIMT, deltaEGR introduced into any of the data values for at least some of the input data being processed by the control algorithm.; This causes the systems to be controlled by compensated data values IVC, Mf that produce predicted time thetaAI of auto-ignition and resulting torque TQAI in the presence of any such disturbance deltaIMT, deltaEGR.

Description

technical field [0001] The present invention relates to diesel engines operating from time to time through an alternate diesel combustion (ADC) process such as HCCI, CAI, DCCS or HPCS to cause self-ignition of the air-fuel mixture as it is compressed in the engine cylinders. Background technique [0002] HCCI (Homogeneous Charge Compression Ignition) is a recognized process for fueling a diesel engine in such a way that a substantially homogeneous air-fuel charge is formed within the engine cylinders during the compression stroke of the engine cycle . After the required fuel for the charge is injected into the cylinder to create an approximately homogeneous air-fuel mixture, increasing the compression of the charge through the upward stroke of the piston creates a high enough temperature to be at or near top dead center (TDC) Light on to make the charge self-ignite. Self-ignition occurs when evaporated fuel at different locations within the mixture spontaneously combusts s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/04F02D41/14
CPCF02D41/3035F02B1/12F02D35/028F02D41/008F02D41/1401F02D2041/1433F02D2200/0414F02D2200/1002Y02T10/42F02D41/04F02D41/14F02D43/04F02D45/00
Inventor W·德奥捷达
Owner INT ENGINE INTPROP CO LLC
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