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System and method for controlling thermal load of high-pressure direct injector in trace diesel ignition cylinder

A control system and injector technology, applied in the direction of fuel injection device, charging system, machine/engine, etc., can solve the problems of injector burnout and high heat load, prevent excessive temperature, improve reliability, overcome heat The effect of overloading

Active Publication Date: 2015-08-12
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems, and propose a thermal load control system and method for high-pressure direct-injection injectors in cylinders with trace diesel ignition. improve engine reliability, economy and emissions

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  • System and method for controlling thermal load of high-pressure direct injector in trace diesel ignition cylinder
  • System and method for controlling thermal load of high-pressure direct injector in trace diesel ignition cylinder
  • System and method for controlling thermal load of high-pressure direct injector in trace diesel ignition cylinder

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0034] figure 1 A specific embodiment of a thermal load control system for a micro-quantity diesel pilot in-cylinder high-pressure direct injection injector is given, including:

[0035] Engine 101, engine temperature sensor 102, exhaust temperature sensor 103, cylinder temperature sensor 104, electronic control system ECU 105, high-pressure natural gas supply pipeline 106, diesel / natural gas injector 107, natural gas injection control solenoid valve 108, diesel injection control solenoid Valve 109, cooling diesel oil volume control valve 110, diesel oil return sensor 111, diesel oil return pipeline 112, high pressure diesel oil supply pipeline 113 and intake air flow sensor 114;

[0036] Electronic control system ECU105, natural gas injection control solenoid valve 108, diesel injection control solenoid valve 109, cooling diesel oil quantity control valve 1...

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Abstract

The invention discloses a system and a method for controlling a thermal load of a high-pressure direct injector in a trace diesel ignition cylinder. The method comprises the following steps of an ECU (Electronic Control Unit) is respectively connected to a natural gas injection control electromagnetic valve, a diesel injection control electromagnetic valve, a cooling diesel quantity control valve and an injector thermal load monitoring feedback system; the diesel / natural gas injector is respectively connected to the natural gas injection control electromagnetic valve and the diesel injection control electromagnetic valve; an annular cooling oil cavity is arranged in a needle valve body of the diesel / natural gas injector; after the cooling diesel enters the annular cooling oil cavity to cool the needle valve body of the injector, the cooling diesel flows into a diesel return pipeline. The system and the method have the beneficial effects that the thermal load of the needle valve body of the direct injector can be effectively controlled to prevent faults, such as burning loss, blockage and coking, of the needle valve body of the injector due to the excess temperature of the needle valve body of the direct injector.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a thermal load control system and method for a high-pressure direct-injection injector in a trace diesel pilot combustion cylinder. Background technique [0002] A trace amount of diesel ignites the in-cylinder high-pressure direct-injection natural gas engine. Due to the natural gas diffusion combustion method, the combustion speed is fast and the knocking tendency is small. Valve structure, small throttling loss, high charge coefficient; using natural gas as the main fuel, low C / H ratio, reducing particulate matter and greenhouse gas emissions, low adiabatic flame temperature, NO x The emission control is relatively easy, almost no fuel enters the exhaust system during the scavenging process, and the HC emission is low. Therefore, this type of engine can achieve better emission performance without sacrificing power, and has good application value. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M53/04F02M43/04F02M51/06
Inventor 李孟涵张强李国祥
Owner SHANDONG UNIV
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