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Diesel and methanol combined combustion engine and control method thereof

A technology for combustion engines and diesel engines, which is applied in engine control, combustion engines, internal combustion piston engines, etc., can solve the problems of heavy-duty vehicles such as excessive smoke emissions, and achieve the effects of reducing diesel consumption, clean emissions, and reducing diesel injection volume

Active Publication Date: 2021-02-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above reasons, it is necessary to develop a technical solution that can solve the problem of heavy-duty vehicle smoke (PM) emission exceeding the limit, and can also greatly reduce the fuel cost of the vehicle owner.

Method used

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  • Diesel and methanol combined combustion engine and control method thereof
  • Diesel and methanol combined combustion engine and control method thereof
  • Diesel and methanol combined combustion engine and control method thereof

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Embodiment 1

[0060] For mechanical pump engines, this kind of application is mainly non-road engines, including marine engines, diesel generator sets, construction machinery, etc., and also includes road vehicles with emission standards of China II and below.

[0061] Diesel-methanol combined combustion engine, including: a diesel engine that can only use diesel fuel, the diesel engine of the diesel engine adopts the direct injection method in the cylinder, and also includes: a methanol injection system located on the intake port of the diesel engine, and a methanol electric motor connected to the methanol injection system Control unit and methanol supply system, post-processor combination, accelerator position sensor, water temperature sensor, speed sensor, methanol liquid level sensor, methanol injector arranged in the exhaust pipe; methanol injection system includes: methanol nozzle and methanol injector ;

[0062] Methanol supply system such as Figure 8 As shown, it mainly includes m...

Embodiment 2

[0104] For diesel engines with National IV and above emission standards, an electronically controlled high-voltage common rail electronic control unit (ECU) is used, and the ECU supports Controllable Area Net (CAN) communication. For this kind of engine, it is not necessary to install an accelerator position sensor, a water temperature sensor and a rotational speed sensor when the diesel methanol combined combustion technology is installed. For the specific schematic diagram, see Figure 4 . It can be seen from the figure that the methanol electronic control unit obtains the speed, accelerator pedal, cooling water temperature and intake air temperature and pressure signals from the diesel ECU CAN message. Among them, the speed and accelerator pedal signals are used for interpolation to calculate the methanol MAP, and the cooling water temperature signal and the intake air temperature and pressure signal are used to correct the methanol MAP. The methanol electronic control uni...

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Abstract

A diesel and methanol combined combustion engine comprises a diesel engine, a methanol injection system, a methanol electric control unit, a methanol supply system and a postprocessor combination. Themethanol injection system is located on an engine air inlet channel. The methanol electric control unit and the methanol supply system are connected with the methanol injection system; the postprocessor combination comprises a special selective catalytic reduction system for methanol, a diesel particulate filter and a diesel oxidation catalyst, the special selective catalytic reduction system formethanol and the diesel particulate filter are controlled by the methanol electric control unit, and the postprocessor combination is mounted on an engine exhaust pipe. Through the diesel and methanol combined combustion technology, efficient combustion of the diesel engine can be achieved, and the heat efficiency of the engine can be remarkably improved especially under medium-large load workingconditions; the diesel and methanol combined combustion technology can reduce NOx and soot emissions without urea assistance at the same time. The invention further relates to a control method of a diesel and methanol combined combustion engine.

Description

technical field [0001] The invention belongs to the field of engines, and in particular relates to a diesel-methanol combined combustion engine and a control method thereof. Background technique [0002] Methanol vehicles are divided into ignition-type methanol passenger cars and commercial vehicles and compression-ignition methanol commercial vehicles. The technical route adopted by ignition-type methanol passenger cars and commercial vehicles is similar to that of traditional gasoline engines, but due to the high latent heat of vaporization of methanol makes the engine cold It is difficult to start, so gasoline is needed to start. When the engine is fully warmed up, methanol fuel is completely used to form a homogeneous mixture in the intake port, and then the premixed mixture is ignited by the spark plug. The technical route adopted by ignition-type methanol commercial vehicles is similar to that of methanol passenger vehicles. The technical route of compression-ignition...

Claims

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Application Information

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IPC IPC(8): F02M21/02F02D41/30F01N13/08
CPCF01N13/08F02D41/30F02M21/02Y02T10/30
Inventor 姚春德姚安仁王斌吴涛阳胡江涛陈超高健
Owner TIANJIN UNIV