CN201144732Y - Electric injection air throttle body - Google Patents

Abstract

The utility model relates to an electric-injection throttle that comprises a body, a throttle shaft, a throttle sheet, a rotating frame and a torsion spring. The throttle shaft is provided with a shaft sleeve; the torsion spring is a double torsion spring that is arranged on the throttle shaft through the shaft sleeve; one end of the double torsion spring is fixed on the body, and the other end is fixed on the rotating frame; the body is also riveted with an adsorption pipe that is communicated with the air main channel on the back part of the throttle sheet; the connecting surface of an intake manifold is arranged on the body; an integrative air inlet side channel is arranged on the body; and the air inlet of the side channel is arranged in the position of the deep platform on the connecting surface of the intake manifold. Thus the electric-injection throttle can improve the working reliability of the torsion spring, and guarantee the accurate resetting of the throttle sheet. Simultaneously, the adsorption pipe is connected with the fuel tank, which reduces the discharge of the fuel vapor and lowers the pressure of the fuel tank.

Description

The electrospray throttle valve body

Technical field

The utility model relates to automotive engine component, is the electrospray throttle valve body of vehicle fuel system specifically.

Background technique

The throttle body of domestic low and middle-grade automobile electronic fuel oil jet oil-fired systems mainly is the mechanical type throttle body at present, its gas handling system mainly is to drive swing frame by the motion of controlling acceleration cable to rotate, throttle plate pin and throttle blade are rotated, and the aperture signal of throttle blade is exported to automobile electronic fuel oil jet system central unit ECU by position transducer.ECU is according to vehicle working condition and sensor signal, and the oil spout of prompting oil sprayer makes gasoline and air be able to abundant mixing, reaches best chemically correct fuel, and gasoline is fully burnt, the content of toxic gas such as C0 and oxynitrides in the vehicle exhaust when reducing idling operation.When engine start, idling operation, the stepper motor that ECU control is installed on the body rotates, and adjusts the aperture of by-pass on the throttle body, with the air inlet of control motor when each operating mode.

Throttle body is the key components and parts of control engine charge in the automobile fuel injection system, after existing throttle body in use exists torsion spring to occur unusually, make throttle blade accurately return even clamping stagnation, perhaps because of the mounting point precision offset of torsion spring on throttle plate pin, cause equally throttle blade accurately return problem (in addition, the unidirectional play of throttle plate pin, cause the unidirectional of throttle blade to move, make throttle blade and chamber body friction and the accurate problem that misplaces of return, generation.To this type of throttle blade problem of misalignment, the inventor be called in name give in the patent application of " axial clearance control mechanism " to solve).

The model utility content

The purpose of this utility model provides a kind of electrospray throttle valve body, to improve the torsion spring functional reliability, with accurate return that guarantees throttle blade and the discharging that reduces fuel-steam in the fuel tank.

This novel purpose is achieved in that a kind of electrospray throttle valve body, comprises having gas main passage body in it, and throttle plate pin, throttle blade, swing frame, torsion spring, throttle plate pin is provided with axle sleeve; Torsion spring is a torsion spring, and the torsion spring warp beam sleeve is arranged on the throttle plate pin, and torsion spring one end is fixed on the body, and the other end is fixed on the swing frame; Also riveting on the body has adsorption tube, and adsorption tube is connected with the gas main passage that is positioned at throttle blade rear portion body.

Above-mentioned body is provided with the intake manifold junction surface.

Be provided with all-in-one-piece air inlet by-pass in the above-mentioned body, the suction port of by-pass is arranged on the heavy stand position on the intake manifold junction surface.

The air inlet main passage of above-mentioned body is divided into two sections, and throttle blade aperture scope is cylindrical for pairing one section, and pairing another section in throttle blade air inlet the place ahead is conical.

Compare with existing throttle body, this novel beneficial effect is:

1, adopt torsion spring, help improving the return performance of throttle body in the throttle body assembly, idle stability, thus reduce motor vehicle exhaust emission, improve driving safety.Adopt torsion spring to replace single torsion spring, and the torsion spring warp beam sleeve is arranged on the throttle plate pin, guarantee the unlikely generation skew of torsion spring position on throttle plate pin and produced displacement, make accurately return of throttle plate pin, guarantee the normal operation of motor, axle sleeve can reduce the friction between torsion spring and body in addition, and the long torsion spring life-span of the court of a feudal ruler is improved the reliability of closure.In addition, after wherein a torsion spring occurred unusually, another root torsion spring can play a protective role in a short time, thereby has improved driving safety.

2, monolithic construction is adopted in this novel body air inlet by-pass, and profile is more compact, attractive in appearance, the saving material, and the stretched design is adopted at middle part, body main passage (throttle blade aperture scope), and the body wall thickness is even, and structural strength is better, and beautiful shape; And the anterior internal channel of throttle blade is up big and down small taper, the intake efficiency height.

3, the bidirectionally limited structure of this novel employing can effectively be controlled axial float, prevents that closure is because of the axial float hair fastener.

4, throttle blade adopts aluminium, reduces cost, and reduces the friction between the metal.

5, adopt adsorption tube that the air-flow main passage at throttle blade rear in the body is communicated with fuel tank,, reduce the pressure of fuel tank to reduce the discharging of fuel-steam.

Description of drawings

Fig. 1 is this novel plan view;

Fig. 2 is the sectional drawing along the A-A line shown in Figure 1;

Fig. 3 is the rear view of Fig. 1;

Fig. 4 is the sectional drawing along the B-B line shown in Figure 3;

Fig. 5 is the stereogram of Fig. 1.

Embodiment

Fig. 1 Fig. 2 illustrates, and body 4 is formed by aluminium alloy compression casting.Throttle plate pin 2 is installed on the body closure bearing hole, and throttle blade 10 is installed on the throttle plate pin 2.The integrated interface that is used for mounting point sensor 1 that is processed with is equipped with stepper motor 6 on the body on the body, and the aperture of air inlet by-pass 16 (Fig. 4) on the step motor control body is to adapt to engine idling condition.Torsion spring is a torsion spring 8, and torsion spring warp beam sleeve 7 is arranged on (axle sleeve 7 is installed on the throttle plate pin, the two Spielpassung) on the throttle plate pin 2.Torsion spring 8 one ends are fixed on the body, and the other end is fixed on (swing frame and throttle plate pin connect firmly) on the swing frame 9, and its axial force makes swing frame reset (swing frame is not stressed, when being in idling conditions, throttle blade is in the closed position).Riveted joint has an adsorption tube 11 on the body 4, adsorption tube be positioned at throttle blade after the gas main passage of body be connected (Fig. 5).The adsorption tube outer end connects fuel tank, to reduce the discharging of fuel-steam, reduces the pressure of fuel tank.Body is provided with intake manifold junction surface 13 (referring to Fig. 3), and it can well satisfy the seal request of intake manifold.Be provided with all-in-one-piece air inlet by-pass 16 in the body 4, the suction port 15 of by-pass is arranged on (to reduce body defects) on heavy stand 14 positions on the intake manifold junction surface 13.The gas main passage of body 4 is divided into two sections, and throttle blade aperture scope is cylindrical for pairing one section, and another section of pairing gas main passage, throttle blade the place ahead is conical.We can say that also middle part, gas main passage is the stretched shape in the body 4, and anterior internal channel is up big and down small taper (referring to Fig. 1).This structure makes that the gas channel changes of section was slowed down when throttle blade was opened in its 0～20 ° of scope, slow down thereby make the gas flow of throttle body change to have significantly, with Security and the travelling comfort that realizes driving.Swing frame adopts plastic materials, and the spacing leg of control throttle opening is a Structural Hardware, can proof strength save cost of material again, and the advantage of plastic product own is a lot.Electrical apparatus element interface on the body is downward, guarantees that contact is working properly.Riveted joint has water pipe 12 on the body 4, and making also can proper functioning under the throttle body situation that temperature is lower in the winter time.Also be provided with the collar 3 that axle is played position-limiting action on the throttle plate pin 2, collar is stuck in the draw-in groove interior (thickness of collar is less than the width of draw-in groove) on the throttle plate pin with a gap.Collar is installed in the bearing inboard of sensor side, can effectively control the axial float of throttle plate pin.Material is that the throttle blade 10 of aluminum alloy is provided with 2 boss, so that the installation of throttle blade.Body 4 is provided with stop screw 5, to be used to adjust idling.

This electrospray throttle valve body is mainly the supporting design of SIEMENS product.

Claims (8)

1, a kind of electrospray throttle valve body comprises having gas main passage body (4) in it, throttle plate pin (2), and throttle blade (10), swing frame (9), torsion spring is characterized in that: described throttle plate pin (2) is provided with axle sleeve (7); Described torsion spring is torsion spring (8), and torsion spring warp beam sleeve (7) is arranged on the throttle plate pin, and torsion spring (8) one ends are fixed on the body (4), and the other end is fixed on the swing frame (9); Also riveting on the described body (4) has adsorption tube (11), and adsorption tube is connected with the gas main passage that is positioned at throttle blade (10) rear portion body.

2, according to the described electrospray throttle valve body of claim 1, it is characterized in that: described body (4) is provided with intake manifold junction surface (13).

3, according to claim 1 or 2 described electrospray throttle valve bodies, it is characterized in that: be provided with all-in-one-piece air inlet by-pass (16) in the described body (4), the suction port of by-pass (15) is arranged on heavy stand (14) position on the intake manifold junction surface (13).

4, according to the described electrospray throttle valve body of claim 3, it is characterized in that: the gas main passage of described body (4) is divided into two sections, and throttle blade aperture scope is cylindrical for pairing one section, and pairing another section in throttle blade air inlet the place ahead is conical.

5, according to the described electrospray throttle valve body of claim 4, it is characterized in that: described body (4) is gone up riveted joint water pipe (12).

6, according to the described electrospray throttle valve body of claim 5, it is characterized in that: also be provided with the collar (3) that axle is played position-limiting action on the described throttle plate pin (2), collar is fastened in the draw-in groove on the throttle plate pin with a gap.

7, according to the described electrospray throttle valve body of claim 6, it is characterized in that: described body (4) is gone up the interface that integrated setting is useful on mounting point sensor (1).

8, according to the described electrospray throttle valve body of claim 7, it is characterized in that: described material is that the throttle blade (10) of aluminum alloy is provided with 2 boss.

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