CN202596912U

CN202596912U - Low-emission diesel engine throat w-shaped piston combustor

Info

Publication number: CN202596912U
Application number: CN 201220209598
Authority: CN
Inventors: 李成伟; 顾婷婷; 汤跃新
Original assignee: First Tractor Co Ltd
Current assignee: YTO (LUOYANG) DIESEL ENGINE CO Ltd
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2012-12-12
Anticipated expiration: 2022-05-11

Abstract

The utility model relates to a low-emission diesel engine throat w-shaped piston combustor, which is characterized in that an exit throat diameter is 61-62mm; a knuckle between the exit throat diameter and a piston top face is 2-3mm; a diameter of the combustor is 67-68mm; a depth of the combustor is 19-21mm; a radius of an inner cavity is 8.5-9.5mm; a knuckle between the radius of the inner cavity and a throat part is 4.5-5.5mm; a diameter of a central boss is 15-16mm; a height of the central boss is 8-10mm; a taper angle of the boss is 115 degrees-116 degrees; and a knuckle between the taper angle of the boss and the inner cavity as well as a knuckle between the taper angle of the boss and the boss are respectively 9-10mm. Compared with a traditional throat w-shaped combustor, the throat ratio of the combustor is increased, the vorticity in the combustor is enhanced, the air movement is complete, oil and gas can be fully mixed and combusted, and optimal oil consumption and emission index are realized.

Description

A kind of low-emission diesel reducing ω type piston combustion bowl

Technical field

The utility model belongs to field of internal combustion engine, relates to a kind of low-emission diesel reducing ω type piston combustion bowl.

Background technique

Along with the progress of society and human to the improving constantly of environmental protection understanding, road and non-road machine more and more cause people's great attention with the emission problem of motor.In recent years, China and countries in the world government have also all issued more and more strict Abgasgesetz in succession.Therefore, the diesel engine product wants to possess wide competitive ability and market, presses for the green diesel machine product of the low pollution of exploitation, low emission, thereby reaches domestic, external emission standard.The factor that influences diesel emission is a lot, and is bigger to the influence of complete machine discharging as the piston of main movement parts.And the firing chamber of piston head is very important to the influence of discharging as the place of oil, gas mixing and burning.Widely-used straight mouthful toroidal combustion chamber of the diesel engine piston of each model of present China and reducing toroidal combustion chamber.The former can't satisfy new emission standard, and the reducing of latter firing chamber can be strengthened the gas turbulence of oral area, promote the mixing and burning of oil, gas, but the firing chamber reducing is smaller, and the oil gas mixing does not reach optimal state.

The model utility content

It is a kind of simple in structure, reasonable in design that the purpose of the utility model is to provide, and can satisfy the low-emission diesel reducing ω type piston combustion bowl that state's III stage emission standard requires.

The technological scheme of the utility model is: a kind of low-emission diesel reducing ω type piston combustion bowl, and throat diameter is 61 ~ 62mm, the knuckle of throat diameter and piston-top surface is 2 ~ 3 mm; The firing chamber diameter is 67 ~ 68mm, and combustion-chamber depth is 19 ~ 21mm; The inner chamber radius is 8.5 ~ 9.5mm; The knuckle at inner chamber radius and aditus laryngis place is 4.5 ~ 5.5mm; The central boss diameter is 15 ~ 16mm, and the central boss height is 8 ~ 10mm, and the boss cone angle is 115 ° ~ 116 °, and the knuckle of the knuckle of boss cone angle and inner chamber and boss cone angle and boss is 9 ~ 10mm.

The utility model can reach following good effect after adopting technique scheme: compare with traditional reducing ω type piston combustion bowl; The boss of this piston combustion bowl bottom is bigger than traditional reducing ω type piston combustion bowl central boss, can improve the utilization ratio of air like this, and increase the reducing ratio of firing chamber; Thereby strengthen the indoor strength of vortex of piston combustion; Air movement is abundant, makes oil, gas mixing and burning fully, reaches best oil consumption and exhaust index.

Description of drawings:

Fig. 1 is the structural representation of a kind of low-emission diesel reducing of the utility model ω type piston combustion bowl.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.As shown in Figure 1, a kind of low-emission diesel reducing ω type piston combustion bowl, throat diameter Φ B is 61 ~ 62mm, the knuckle r1 of throat diameter Φ B and piston-top surface is 2 ~ 3 mm; Firing chamber diameter of phi A is 67 ~ 68mm, and combustion-chamber depth H is 19 ~ 21mm; The inner chamber radius R is 8.5 ~ 9.5mm; The knuckle r2 at inner chamber radius R and aditus laryngis place is 4.5 ~ 5.5mm; Central boss diameter of phi C is 15 ~ 16mm, and central boss height E is 8 ~ 10mm, and the boss cone angle is 115 ° ~ 116 °, and the knuckle r4 of boss cone angle and inner chamber and the knuckle r3 of boss cone angle and boss are 9 ~ 10mm.

Adopt the piston of this diesel engine reducing ω type piston combustion bowl to be equipped with the many spray orifices nozzle that is complementary with it; High-pressure electric control rmc monomer pumps etc. are through the oil supply system of optimal design; Through control to the oil-fired system fuel supply rate curve; Cooperate the multiport nozzle of small aperture, and adopt rational nozzle cone angle, can reach the requirement of ideal engine performance and emission standard.

Compare with traditional reducing toroidal combustion chamber, increased the reducing ratio of firing chamber, strengthen the eddy current in the firing chamber, make the sufficient mixing and burning of oil, gas rule on request, thereby reach best oil consumption and exhaust index.

Claims

1. low-emission diesel reducing ω type piston combustion bowl, it is characterized in that: throat diameter (Φ B) is 61 ~ 62mm, throat diameter (Φ B) is 2 ~ 3 mm with the knuckle (r1) of piston-top surface; Firing chamber diameter (Φ A) is 67 ~ 68mm, and combustion-chamber depth (H) is 19 ~ 21mm; Inner chamber radius (R) is 8.5 ~ 9.5mm; Inner chamber radius (R) is 4.5 ~ 5.5mm with the knuckle (r2) at aditus laryngis place; Central boss diameter (Φ C) is 15 ~ 16mm; Central boss height (E) is 8 ~ 10mm; Boss cone angle (α) is 115 ° ~ 116 °, and boss cone angle (α) is 9 ~ 10mm with the knuckle (r4) of inner chamber and the knuckle (r3) of boss cone angle (α) and boss.