CN2876352Y

CN2876352Y - High efficiency large displacement low discharge diesel oil engine piston combustion chamber

Info

Publication number: CN2876352Y
Application number: CN 200620068672
Authority: CN
Inventors: 史永康
Original assignee: CHANGZHOU YAMEIKE MECHANICAL EQUIPMENT Co Ltd
Current assignee: CHANGZHOU YAMEIKE MECHANICAL EQUIPMENT Co Ltd
Priority date: 2006-01-20
Filing date: 2006-01-20
Publication date: 2007-03-07
Anticipated expiration: 2016-01-20

Abstract

Based on the problem of small ratio of diameter and depth and low combustion efficiency in the existing piston combustion chamber of a diesel engine with the cylinder diameter between the Phi113 and Phi135mm, the utility model discloses a kind of piston combustion chamber of a diesel engine with high efficiency, large exhaust and low emission. The main model body of the axial profile is of Omega shape. The characteristic is that the model is composed of two symmetrical arc sections (1) with the bottom arc radius D from R7mm to R11mm and the line segment (2) tangent to the arc section (1); the angle between the two line segments (2) is 1100-1140; the diameter A of the Omega-shaped combustion chamber is Phi66. 5 - Phi76 mm; the diameter B of the throat mouth is Phi52-Phi68mm; the depth C is 19-26mm, and the transiting angle J of the throat mouth section and the bottom arc section (2) is R0.5 - R4. The reasonable design of the size of each part of the combustion chamber greatly improves the combustion efficiency and meets the requirements of the advanced emission standards of the world.

Description

Efficient big discharge capacity low emissions diesel piston firing chamber

Technical field

The utility model relates to a kind of burning chamber of diesel engine, and especially a kind of cylinder diameter is at the big capacity diesel engine piston combustion bowl of Φ 113～Φ 135mm, specifically a kind of efficient big discharge capacity low emissions diesel piston firing chamber.

Background technique

At present, in all kinds of direct injection diesel engine that China produces, the axial section of its piston head all is ω shape, the structure of this firing chamber, shape, size and the position of piston head to cylinder in air motion and oil gas mix bigger influence all arranged, thereby directly have influence on the combustion performance of diesel engine.The straight mouth ω shape firing chambers of adopting, the firing chamber of existing diesel engine with direct injection produce the air inlet of rotating around cylinder-bore axis and squeeze stream more when air enters cylinder by intake duct, be beneficial to fuel and Air mixing.But because the oral area of firing chamber is straight mouth structure, quench area is less, therefore can not form enough crowded stream, so air utilization ratio is on the low side, cause fuel and Air mixing effect to reduce, can't form desirable inflammable mixture, it is insufficient to burn, and causes exhaust performance not reach environmental requirement.At the problems referred to above, at present people cylinder diameter be between 94～97mm plunger designs the ω shape firing chamber of a kind of piston combustion bowl for closing up, straight mouthful of ω shape firing chamber, this firing chamber can increase the crowded stream effect of firing chamber, to improve the utilization ratio of air.But for the big capacity diesel engine of cylinder diameter between Φ 113～Φ 135mm because the increasing of cylinder diameter, certainly will bring the footpath of firing chamber dark than reducing, relation between balance quality and the exhaust well, the air utilization ratio in the firing chamber is on the low side, has therefore influenced the raising of combustion efficiency.

Summary of the invention

The purpose of this utility model is to design a kind of efficient big discharge capacity low emissions diesel piston firing chamber than the problem little, that combustion efficiency is low deeply at the footpath that the diesel engine piston firing chamber of existing cylinder diameter between Φ 113～Φ 135mm exists.

The technical solution of the utility model is:

A kind of efficient big discharge capacity low emissions diesel piston firing chamber, piston diameter is between Φ 113～Φ 135mm, its axial section main body is ω shape, it is characterized in that it mainly is made up of at the arc section 1 of R7～11mm and with the tangent straightway 2 of arc section 1 the bottom radius of arc D of two symmetries, the angle G of described two straightways 2 is between 110 °～141 °, ω shape firing chamber diameter A is at Φ 66.5～Φ 76mm, throat diameter B is at Φ 52～Φ 68mm, degree of depth C is at 19～26mm, and the knuckle J of aditus laryngis part and bottom arc section 2 is at R0.5～R4.

The utlity model has following advantage:

1, the utility model is by the analysis to diesel engine air inlet system, fuel injection characteristic and cylinder head general arrangement, reasonable Arrangement piston head ω shape combustion-chamber shape and size, increased the footpath outside the firing chamber deeply than, it is desirable more that oil gas is mixed, simultaneously air utilization ratio is improved, thereby reaches desirable high-performance, the index of low emission.

2, the firing chamber of the utility model structure can make the diesel engine pollutant emission reach Europe I standard, can reach European II standard after installing exhaust purifier additional, and fuel-economizing simultaneously has good social benefit and economic benefit.

Description of drawings

Fig. 1 is the axial section structural representation of piston combustion bowl of the present utility model.

Embodiment

Following structure drawings and Examples are further described the utility model.

As shown in Figure 1.

A kind of efficient big discharge capacity low emissions diesel piston firing chamber, piston diameter is between Φ 113～Φ 135mm, its axial section main body is ω shape, it mainly is made up of at the arc section 1 of R7～11mm and with the tangent straightway 2 of arc section 1 the bottom radius of arc D of two symmetries, the angle G of described two straightways 2 is between 110 °～141 °, ω shape firing chamber diameter A is at Φ 66.5～Φ 76mm, throat diameter B is at Φ 52～Φ 68mm, degree of depth C is at 19～26mm, and the knuckle J of aditus laryngis part and bottom arc section 2 is at R0.5～R4.

Straightway described in the utility model, arc section, be the shape of hatching, it and real space relation is corresponding to be plane or cylndrical surface, sphere etc.

The utility model other do not relate to partly all same as the prior art.

Claims

1, a kind of efficient big discharge capacity low emissions diesel piston firing chamber, its axial section main body is ω shape, it is characterized in that it mainly is made up of at the arc section (1) of R7～11mm and with the tangent straightway (2) of arc section (1) the bottom radius of arc D of two symmetries, the angle G of described two straightways (2) is between 110 °～141 °, ω shape firing chamber diameter A is at Φ 66.5～Φ 76mm, throat diameter B is at Φ 52～Φ 68mm, degree of depth C is at 19～26mm, and the knuckle J of aditus laryngis part and bottom arc section (2) is at R0.5～R4.

2, efficient big discharge capacity low emissions diesel piston firing chamber according to claim 1 is characterized in that described piston diameter is at Φ 113～Φ 135mm.