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Electronic control method of variable gas inlet and exhaust system of compression ignition engine

A technology of electronic control and electronic control unit, applied in electrical control, engine control, non-mechanical actuated valves, etc., can solve the inevitable problems of high emissions of soot and NOx, reduce harmful products, reduce manufacturing costs, The effect of improving performance

Inactive Publication Date: 2009-09-09
TIANJIN UNIV
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Problems solved by technology

However, the biggest disadvantage of this traditional compression ignition internal combustion engine is that high emissions of soot and NOx in fuel combustion are almost inevitable

Method used

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  • Electronic control method of variable gas inlet and exhaust system of compression ignition engine
  • Electronic control method of variable gas inlet and exhaust system of compression ignition engine

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Embodiment

[0016] What the prototype of the present invention selects is the Landking WP12.480 heavy-duty diesel engine of Weichai Power Co., Ltd.

[0017]The electronic control method of the intake and exhaust system of the compression ignition internal combustion engine is composed of a supercharging system, an exhaust gas recirculation system, an intake valve late closing mechanism and an electronic control system; the supercharging system adopts a two-stage turbocharger, the first The variable turbocharger 1 is used in the first stage. According to the different target density requirements of the internal combustion engine, the section of the turbine nozzle ring can be controlled to change the intake pressure. At the same time, the opening and closing of the bypass valves 2 and 3 at both ends of the turbine and compressor can realize Intake low pressure and high pressure conversion; exhaust gas recirculation system includes high-pressure exhaust gas recirculation system and low-pressu...

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Abstract

The invention relates to an electronic control method of a variable gas inlet and exhaust system of a compression ignition engine, comprising a pressurization system, a waste gas recycle system, a gas intake valve late-closing mechanism and an electronic control system. The pressurization system adopts a two-level turbocharger; the waste gas recycle system comprises a high-pressure part and a low-pressure part; the gas intake late-closing mechanism is a gas intake valve push rod which is capable of adjusting the telescopic length in a self-adapting hydraulic control mode based on self motion position, and the gas intake late-closing mechanism consists of a hydraulic push rod assembly and a hydraulic auxiliary mechanism, wherein the hydraulic push rod assembly is fixed at the upper end of an internal-combustion engine cylinder head; a hydraulic oil pump is fixed on an internal-combustion engine body; an electronic control system is controlled by an electronic control unit; and the electronic control unit judges and controls the density of intake gas in real time through a pressure sensor, a temperature sensor, a rotate speed sensor, and the like in the system. The invention can control the density of intake gas in real time, improves the performance of the internal-combustion engine, greatly reduces discharged harmful product and enhances the reliability.

Description

technical field [0001] The invention relates to an internal combustion engine manufacturing technology, in particular to an electronic control method for a variable intake and exhaust system of a compression ignition internal combustion engine. Background technique [0002] The traditional compression ignition internal combustion engine belongs to the diffusion combustion of combustion spray, relying on the high temperature when the engine piston is compressed to near the end to make the mixture spontaneously ignite. For a long time, this traditional compression ignition internal combustion engine has been proved to be easy to control the combustion phase, easy to control the heat release rate, and has high thermal efficiency. However, the biggest disadvantage of this traditional compression-ignition internal combustion engine is that the high emissions of soot and NOx in fuel combustion are almost inevitable. This is because the mixing time of spray and air is very short, ...

Claims

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Application Information

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IPC IPC(8): F02D43/00F01L1/34F01L9/02F01L9/10
Inventor 苏万华裴毅强韩志强战强刘学龙
Owner TIANJIN UNIV
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