CN2214533Y - 90 cylinder direct jetting diesel engine - Google Patents

Abstract

The utility model relates to a diesel engine, particularly a 90 cylinder diameter serial diesel engine for an automobile. After the improvement of the shape and the position structure of a combustion chamber and the position structure of a fuel injector, the head shape and structure of a spiral air inlet path is in a mathematical model which is rho =ae< 0 321 theta > and y< 2 >=36.88X, the opening of an air inlet valve seat which is loudspeaker opening-shaped, the position and structure of an air inlet valve, the great improvement of the rotation speed and the air utilization rate of air inlet swirl, optimal fuel distribution and atomisation are formed. So direct spray type combustion can be realized. The utility model has good cold start ability and reduces the thermal load of a cylinder cover. Fuel consumption rate is reduced by about sixteen percent.

Description

90 cylinder direct jetting diesel engine

The utility model relates to diesel engine, particularly the 90 cylinder diameter family cars shape and structure and the positional structure of firing chamber, oil sprayer, intake valve and the spiral inlet duct of diesel engine with direct injection.

Original vortex type 90 serial diesels engine for automobile are made of connecting rod, distribution device, fuel supply system, cooling system, lubricating system, starting system etc., because the flow losses that combustion gas brings by vortex chamber's spray orifice, be difficult for starting without preheating under the normal temperature, when ambient temperature is high, be arranged on the cylinder head owing to the firing chamber, the cylinder head heat load is heavy, and occur " boiling " phenomenon easily, its external characteristics consumption minimization is generally more than 258.4g/KW.h.Its cold-start performance is relatively poor, the heat load height of cylinder head, oil consumption height, and Economy is undesirable.

Given this, the purpose of this utility model just is to provide a kind of direct injection diesel engine gas distribution system and chamber structure that improves and optimizates, to improve 90 cylinder diameter direct-injection diesel engines of cold-start performance, reduction cylinder head heat load, reduction fuel consumption rate.

90 cylinder diameter direct-injection diesel engines of the present utility model adopt shape and the positional structure of improving the firing chamber, the positional structure of oil sprayer, and the shape and structure of spiral inlet duct, suction valve cone, the positional structure of intake valve realizes its purpose.

90 cylinder diameter direct-injection diesel engines of the present utility model (referring to accompanying drawing), the connecting rod that includes the toroidal combustion chamber (4) on the piston head, the distribution device that the intake valve (6) that spiral inlet duct (9) is arranged and match with suction valve cone (5) on the cylinder head is formed has fuel supply system, cooling system, lubricating system, the starting system of the oil sprayer (8) on the cylinder head of being arranged on.

Above-mentioned firing chamber,

Depart from Zs=(3.33～5.56 with the central cross of cylinder) λ D

With the central longitudinal of cylinder to departing from Zl=(1.11～2.78) λ D

Its depth H=(18.33～21) λ D

Ratio dk/H=(2.6～3.55 of its diameter and the degree of depth) λ D

Above-mentioned oil sprayer

Depart from Ps=(8.88～10 with the central cross of cylinder) λ D

With the central longitudinal of cylinder to departing from Pl=(2～3.33) λ D

Its established angle β=(0.22 °～0.23 °)/λ

The S=(2.3 of its oil injector hole and suction valve cone～3.5) λ D

Little spacing

Above-mentioned spiral inlet duct,

Its head ABC wall track ρ=ae ^{0.321 θ}

Its head EF wall track Y ²=36.88X

Above-mentioned suction valve cone

Its throat diameter dz=(37.8～40.3) λ D

Its mouth flare

Above-mentioned intake valve,

Its diameter d v=(45.56～46.67) λ D

Minimum separable δ v=(1.80～2.2 with cylinder wall) λ D

Lateral shift Svs=(6.67～8.33 with cylinder axis) λ D

The meaning of above-mentioned various middle symbol is

D: cylinder bore

λ: constant λ=1/100

A: spiral inlet duct valve guide bushing lug diameter

E: the natural logarithm truth of a matter.

θ: angle variables.

The X:X coordinate values

The Y:Y coordinate values

90 cylinder diameter direct-injection diesel engines of the present utility model have following tangible advantage and significant effect.

One, the improvement of the shape and structure of spiral inlet duct of the present utility model, the improvement of suction valve cone degree of lip-rounding shape structure, improve the rotational speed of eddy current in the intake duct significantly, thereby can form best swirl rate after making air enter the firing chamber, realized the optimization of straight spray burning.

The formation bus of two, the improvement of the positional structure of the shape of firing chamber of the present utility model and positional structure, intake valve, suction valve cone mouth changes skew lines, seat mouthful flare into by camber line, make firing chamber intermediate fuel oil spraying distribute more even, under the cooperation of intake duct, improve the intake swirl rotating speed significantly, in the firing chamber, formed direct injection combustion.

Because of its above-mentioned structural advantages, thereby improved the air utilization ratio of firing chamber, and made this motor have good cold-start performance, and reduced the heat load of cylinder head, it is about 16% to reduce fuel consumption rate, has good and economic and power character.

Below, use embodiment and accompanying drawing thereof again, the utility model is described in further detail.

Brief description of drawings.

Fig. 1 is the structural representation of a kind of 90 cylinder diameter direct-injection diesel engines of the present utility model.Show 490Q(DI) the diesel engine profile.

Fig. 2 is the firing chamber of Fig. 1 and the structural representation sketch of oil sprayer.

Fig. 3 is that the A of Fig. 2 is to the TV structure simplified schematic diagram.The structure that shows piston head.

Fig. 4 is that the B of Fig. 2 is to the TV structure simplified schematic diagram.The structure that shows oil sprayer mouth, suction valve cone.

Fig. 5 is the C-C broken section structural representation of Fig. 4.The structure that shows suction valve cone.

Fig. 6 is the structural representation sketch of the spiral inlet duct of Fig. 1.

Fig. 7 is that the D of Fig. 6 is to the TV structure simplified schematic diagram.And demonstration Building X parameter and Building Y parameter.

Embodiment 1

A kind of 90 cylinder diameter direct-injection diesel engines of the present utility model, 490Q(DI as shown in drawings) the type four-cylinder diesel engine.Have by the ω type on four cylinders 1, cylinder head 2, four pistons 3 and the top thereof and directly spray the connecting rod that firing chamber 4 constitutes, the distribution device that the intake valve 6 that spiral inlet duct on the cylinder head of being opened in is arranged and match with suction valve cone 5 on the cylinder head constitutes has the fuel supply system of the oil sprayer 8 in the oil injector hole 7 on the cylinder head of being installed in and cooling system, lubricating system, starting system etc.

The cylinder bore D=90mm of this diesel engine, λ=1/100, and to set crankshaft direction be vertical, is horizontal perpendicular to crankshaft direction.Main nominal size is as follows.

Center line K, L that above-mentioned firing chamber 4 is suitable for reading, respectively and the distance between center line M, the N of cylinder end face, promptly

Lateral run-out Zs=5.56 λ D=5mm

Vertically depart from Zl=2.22 λ D=2mm

The depth H of firing chamber=19.44 λ=17.5mm

The ratio of firing chamber diameter d k and its depth H

dk／H＝3.11λD＝2.8

Above-mentioned oil sprayer 8 is selected four common hole type nozzles for use, center line O, the P in its oil sprayer aperture 10, and the distance between center line M, the N of cylinder end face, promptly

Lateral run-out Ps=8.89 λ D=8mm

Vertically depart from Pl=2.22 λ D=2mm

Oil injector hole 7 is the central axis Q of oil sprayer and the angle between the cylinder axis axis R, promptly

Oil sprayer established angle β=0.23 °/λ=23 °

Minimum separable between the seat mouth 11 of oil sprayer aperture 10 and suction valve cone 5

S＝2.37λD＝2.13mm

The head spiral wall ABC section track of above-mentioned spiral inlet duct 9 is pressed following formula and is formed

ρ＝ae ^0.321θmm

In the formula, a is spiral inlet duct valve guide bushing lug diameter a=φ 11mm

E is the natural logarithm truth of a matter

θ is an angle variables

Screw thread intake duct 9 head side wall EF section tracks are pressed following formula and are formed,

Y ²＝36.88X mm ²

In the formula: X is the coordinate values of horizontal ordinate X,

Y is the coordinate values of ordinate Y.

Above-mentioned suction valve cone 5 is installed in cylinder head bottom surface spiral inlet duct 9 oral areas, is ring, and its mouth 11 is the toroidal that bus is a skew lines.

The diameter of the aditus laryngis 12 of suction valve cone,

dz＝38.89λD＝35mm

Above-mentioned intake valve 6 adopts common structure, its diameter

dv＝46.67λD＝42mm

The minimum separable that intake valve and cylinder wall are 13,

δv＝1.89λD＝1.7mm

Intake valve center line T, U are with the horizontal spacing of cylinder centerline M, N, promptly

Svs＝6，67λD＝6mm

After above-mentioned improvement, make 490Q(DI) diesel engine with direct injection, this function realizes not preheat starting under the normal temperature, has good cold starting performance, has reached following good and economic, power index,

Peak output/rotating speed is 45.59KW/3200r/min

Maximum Torque/rotating speed is 156.8N.m/2240r/min

Minimum specific fuel consumption≤217g/KW.h

Compare rate of fuel consumption with existing homotype vortex diesel engine and reduce about 16%.

The maximum smoke intensity of the external characteristics≤3.2 ripple units of being permitted.

As mentioned above, the utlity model has good economic benefit and social benefit.

Claims (1)

1,90 cylinder diameter direct-injection diesel engines, the connecting rod that includes the toroidal combustion chamber (4) on the piston head, the distribution device that the intake valve (6) that spiral inlet duct (9) is arranged and match with suction valve cone (5) on the cylinder head is formed, fuel supply system, cooling system, lubricating system, starting system that oil sprayer (8) on the cylinder head of being arranged on is arranged, it is characterized in that

(1) above-mentioned firing chamber,

Depart from Zs=(3.33～5.56) λ D with the central cross of cylinder

With the central longitudinal of cylinder to departing from Zl=(1.11～2.78) λ D

Its depth H=(18.33～21) λ D

Ratio dk/H=(2.6～3.55) the λ D of its diameter and the degree of depth

(2) above-mentioned oil sprayer,

Depart from Ps=(8.88～10) λ D with the central cross of cylinder

With the central longitudinal of cylinder to departing from Pl=(2～3.33) λ D

Its established angle β=(0.22 °～0.23 °)/λ

Minimum S=(2.3～3.5) the λ D of its oil injector hole and suction valve cone

Spacing

(3) above-mentioned spiral inlet duct,

Its head ABC wall track ρ=ae ^{0.321 θ}

Its head EF wall track Y ²=36.88X

(4) above-mentioned suction valve cone

Its throat diameter dz=(37.8～40.3) λ D

Its mouth flare

(5) above-mentioned intake valve,

Its diameter d v=(45.56～46.67) λ D

Minimum separable δ v=(1.80～2.2) λ D with cylinder wall

Lateral shift Svs=(6.67～8.33) λ D with cylinder axis

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