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Combustion chamber of n-caprylic alcohol combusting internal combustion engine

A combustion chamber and n-octanol technology, which is applied in the field of combustion chambers of compression ignition internal combustion engines, can solve problems such as differences in properties of biofuels, diesel oil, and gasoline, and achieve the effects of reduced emissions, high combustion efficiency, and high combustion efficiency

Pending Publication Date: 2020-10-02
NANJING UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Although many studies on the controllable parameters of biofuels are carried out in diesel engines or gasoline engines, there are qualitative differences between biofuels, diesel and gasoline.

Method used

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  • Combustion chamber of n-caprylic alcohol combusting internal combustion engine
  • Combustion chamber of n-caprylic alcohol combusting internal combustion engine
  • Combustion chamber of n-caprylic alcohol combusting internal combustion engine

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Embodiment

[0022] Example: see figure 1 , 2 , 4, a combustion chamber structure size diagram of a n-octanol internal combustion engine, the gas movement in the combustion chamber is mainly the movement of air and the formation of mixed combustion gas, and a deeper "ω" type is set on the top of the piston diameter 1 Dimple, forming throat D2, combustion chamber depth H8, bowl diameter T9 and necking angle θ6. The design of the combustion chamber "throat" is directly related to the depth of the combustion chamber. The "throat" is wide, and the combustion chamber is too deep, resulting in low maximum combustion pressure and pressure rise rate, and "rough" work, more noise, vibration and nitrogen oxide emissions, and a greater load on the overall machinery; " Throat" is narrow, and the combustion chamber oversubmerged cannot be applied to high-speed internal combustion engines, and the applicable area is narrow.

[0023] The piston diameter 1 is designed to be 75mm. The upper part of the ...

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Abstract

The invention provides a combustion chamber structure of a n-caprylic alcohol combusting internal combustion engine and an oil injector according to physical and chemical characteristics of bio-fuel n-caprylic alcohol. An omega-shaped pit is formed in the top of a plunger to form a combustion chamber, the oil injector is arranged on a central position over the plunger, and an oil injection track of the oil injector is matched with the shape of the combustion chamber. The diameter of the omega-shaped pit is a throat diameter, the longest diameter of a bottom bowl shape is a bowl-shaped diameter, the depth of the combustion chamber is the height from a top end of the omega-shaped pit to a bowl-shaped bottom end, a necking angle is an inclined angle theta between a bowl-shaped contour and anaperture position, injection timing is an angle of a crankshaft when fuel starts to be combusted, and an injection taper angle is an inclined angle alpha formed between an injection direction and a cylinder axis in an XY plane. The shape of the combustion chamber and an oil injector are combined to control the oil injection track so that injected fuel oil can be combusted to the largest extent.

Description

technical field [0001] The invention belongs to the field of internal combustion engines, and in particular relates to a set of compression ignition internal combustion engine combustion chambers tailored for biofuel n-octanol. Background technique [0002] Due to the non-renewability of fossil fuels, limited reserves, and high environmental pollution, efficient alternative fuels have been extensively studied. Most of these studies can be divided into two categories: research on fuel characteristics and research on combustion emission characteristics of internal combustion engine controllable parameters, and strive to improve combustion efficiency and reduce pollutant emissions. [0003] Although many studies on the controllable parameters of biofuels are carried out in diesel engines or gasoline engines, there are qualitative differences between biofuels, diesel and gasoline. Aiming at the physical and chemical characteristics of environmental-friendly biofuel n-octanol, t...

Claims

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Application Information

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IPC IPC(8): F02B23/06
CPCF02B23/0672F02B23/0624F02B23/0645Y02T10/12
Inventor 李晶于笑刘陈史瑞鹏
Owner NANJING UNIV OF TECH