A dynamic engine deactivation reforming control method and control system thereof

A control method and engine technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems of difficult ignition and combustion, unstable combustion, etc., to stabilize the combustion process in the cylinder, avoid poor economy, reduce less economical effect

Active Publication Date: 2020-08-18
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a dynamic engine deactivation reforming control method and its control system in the same cylinder in order to overcome the difficulty of ignition and combustion of the engine under dilution conditions, and the problem of unstable combustion, so as to improve the efficiency of the engine. Fuel activity within the cylinder to optimize and control the combustion process for improved combustion stability and economy

Method used

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  • A dynamic engine deactivation reforming control method and control system thereof
  • A dynamic engine deactivation reforming control method and control system thereof
  • A dynamic engine deactivation reforming control method and control system thereof

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Embodiment approach

[0053] 1. With the combustion top dead center as 0°CA, the exhaust valve is closed at 240°CA after top dead center, and the residual exhaust gas in the cylinder is used to retain part of the residual exhaust gas in cylinder 1;

[0054] 2. Inject 25% gasoline (2.552mg) into the cylinder at 360°CA, and expand and compress together with the residual exhaust gas in the cylinder, and the valve does not open during this process;

[0055] 3. Spray 25% gasoline (2.552mg) into the cylinder at 700°CA to enhance the flow in the cylinder and the contact area between exhaust gas and fuel, and promote the reforming reaction;

[0056] 4. The piston descends, the intake valve opens at 743°CA, the cylinder begins to intake air, and enters the combustion stage;

[0057] 5. The intake valve is closed at 874°CA, and the remaining 50% gasoline (5.100mg) is injected into the cylinder at 1040°CA, and then the spark plug is ignited at 1060°CA to ignite the mixture and complete the combustion process;...

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Abstract

The invention discloses an engine dynamic cylinder deactivation reforming control method to control mixed reforming and combustions of fuels in the same cylinder. The phase and the lift of an intake valve and an exhaust valve are adjusted by a variable valve mechanism control module to control the amount and the temperature of waste gas in the cylinder. The injection time, the injection frequencyand the injection amount of pilot injection fuel oil in the cylinder are controlled by a fuel injection and ignition control module, and injection time is controlled. Closing of the exhaust valve is taken as starting time in the whole process of cylinder deactivation reforming, and opening of the intake valve is taken as finishing time. By the method, a dilution combustion process can be optimized, and running stability and economical efficiency of an engine are improved. The invention further discloses a control system implementing the method. The control system comprises an engine managementmodule, a combustion information acquisition and analysis module, the variable valve mechanism control module and the fuel injection and ignition control module. The control system finishes dynamic cylinder deactivation reforming closed-loop feedback control by real-time acquisition, transmission, calculation and feedback of signals.

Description

technical field [0001] The invention relates to an engine combustion process control method and a control system, in particular to an engine dynamic cylinder-stop reforming control method and a control system thereof. Background technique [0002] Now, high-dilution and low-temperature combustion of gasoline engines has become a research hotspot in the field of internal combustion engines. Among many high-dilution and low-temperature combustion methods, homogeneous compression ignition (HCCI) combustion technology, also known as controlled auto-ignition (CAI) combustion technology, has become the mainstream high-temperature combustion technology due to its economic and emission advantages. Dilute low-temperature combustion method; however, it has problems such as too narrow load range and lack of effective control of the combustion process, which affects the improvement of engine operation stability and economy. [0003] In order to solve the above problems, the academic ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/06
CPCF02D13/0246F02D13/06
Inventor 陈韬谢辉冯译方
Owner TIANJIN UNIV
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