CN207660742U - A kind of fuel pressure adapter and engine system - Google Patents

Abstract

The utility model discloses a kind of fuel pressure adapter and engine systems, one of which fuel pressure adapter, including valve body, hydraulic chamber, spring housing, negative pressure chamber, the hydraulic chamber, spring housing, negative pressure chamber is all located in valve body, the sealing piston that includes of hydraulic chamber separates hydraulic chamber and spring housing, resilient support seat is equipped in spring housing, spring housing and negative pressure chamber are separated, negative pressure chamber is connected with motor intake manifold, intake air pressure is directly applied on resilient support seat, when engine air throttle aperture is bigger, the pressure that intake air pressure applies is bigger, and a kind of engine system containing the fuel pressure adapter, the fuel oil adapter and engine system have the characteristics that engine injection pressure can be adjusted in synchronism according to engine air throttle aperture.

Description

A kind of fuel pressure adapter and engine system

Technical field

The utility model is related to technical field of engines more particularly to a kind of fuel pressure adapter and engine systems System.

Background technology

With the continuous maturation of engine power technology, engine section is more and more paid attention to for the improvement of engine Energy emission reduction direction, current most of engine all use electronic control injection technology, instead of traditional carburetor before, keep away Exempt from air-fuel mixture imbalance, because of the fuel injection amount of engine demand, be according to ECU to the conduction time of fuel injector length come Control, if not controlling fuel pressure, even if the conduction time for adding to fuel injector is identical, but when fuel pressure is excessively high, fuel oil Emitted dose can increase, otherwise when fuel pressure is too low, then fuel injection amount can be caused to reduce, if the frequent appearance of oil pressure The case where fluctuation, can cause engine to draw vibrations and a series of following problems.So when system oil pressure and air intake branch pressure When force difference changes, fuel pressure regulator can be turned into corresponding change in response to system oil pressure with the change of air intake branch pressure difference Change, so that the oil pressure in holding system is stablized.The fuel pressure regulator of mainstream is mainly based on diaphragm type at present, and such as China is special Fuel pressure regulator described in sharp file 201520490129.5 and 201620521299.X, is all with diaphragm compression deformation Mode adjusts fuel pressure, the disadvantage is that the fuel pressure regulator working frequency height in the case of diaphragm the relative usage longevity Life is shorter, and engine operating condition is complicated and changeable, and above-mentioned fuel pressure regulator pressure regulation spectrum is fixed, can not with start The changeable operating mode of machine is adapted.

Utility model content

In order to solve the problems of the above-mentioned prior art, the utility model proposes a kind of fuel pressure adapter and Engine system, solves that diaphragm is fragile in common fuel pressure regulator and fuel oil adjustable range underaction is changeable Disadvantage.

What the technical solution of the utility model was realized in：

A kind of fuel pressure adapter, which is characterized in that including valve body, hydraulic chamber, spring housing, negative pressure chamber, the oil pressure Room, spring housing, negative pressure chamber are all located in valve body, and sealing piston, spring, resilient support seat are equipped in the spring housing, described close Envelope piston separates the hydraulic chamber and the spring housing, and one side of the sealing piston far from hydraulic chamber is equipped with counterbore, described The one side that resilient support seats against nearly sealing piston is equipped with guide post, and the spring one end is placed in the guide post, and the other end is stretched Enter in the counterbore, the valve body is equipped with limiting section, stop portion, and the sealing piston is described close to being resisted against on one side for hydraulic chamber On limiting section, the resilient support seat being resisted against on one side on the stop portion far from the spring housing, the negative pressure chamber is equipped with The spring housing and the negative pressure chamber is isolated in air pressure interface, the resilient support seat, and the hydraulic chamber is equipped with fuel feed hole, pressure release Column, the fuel feed hole are located on the side wall of the valve body, and the pressure release column is fixed on the valve body and is right against the sealing piston Bottom surface on and part be pierced by the valve body, which is vertically equipped with guide hole, and the pressure release column is located at institute The excircle for stating hydraulic chamber part is equipped with more than two oil-through-holes, which is connected to the guide hole, the sealing piston It is equipped with a nose bar close to the one side of the pressure release column, which is inserted into the guide hole.

In this fuel pressure adapter of the utility model, it is recessed that the nose bar excircle is vertically equipped with one Section, the concave segment is interior to be socketed sealing shroud.

On this basis, the utility model also provides engine system, which is characterized in that the engine system includes upper A kind of fuel pressure adapter stated.

This fuel pressure adapter and engine system for implementing the utility model, have the advantages that：

In this fuel pressure adapter and engine system of the utility model, negative pressure chamber and engine charge discrimination Pipe is connected, and intake air pressure is directly applied on resilient support seat, and when engine air throttle aperture is bigger, intake air pressure applies Pressure it is bigger so that spring reversely applies pressure in sealing piston, and oil-through-hole is closed so that enter engine The fuel pressure of atomizer also becomes larger, the admission pressure on the contrary when throttle opening is smaller, being applied on resilient support seat Smaller, fuel pressure jacks up sealing piston, and nose bar gradually opens oil-through-hole, into engine nozzle fuel pressure therewith Lower, distributive value is reduced, and admission pressure is smaller, and the oil-through-hole that nose bar is opened is more, and oil pressure is lower, and vice versa, is fired with tradition Oil pressure draught control mechanism is compared, and the fuel oil adapter of the utility model has service life long, and oil pressure adjustable range is flexible, same with this When but also air-fuel ratio of the engine system under different operating modes is optimized, improve the dynamic property and fuel-economy of engine Property.

Description of the drawings

Fig. 1 is the schematic diagram of the fuel pressure adapter of the utility model；

Fig. 2 is the engine system partial schematic diagram of the utility model.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe.

This fuel pressure adapter of the utility model as shown in Figure 1, including valve body 100, hydraulic chamber 1, spring housing The valve wall of 2, negative pressure chamber 3 etc., hydraulic chamber 1 is equipped with fuel feed hole 11, and fuel feed hole 11 is connected to engine fuel pipe, and draining column 12 is solid Be right against on the pedestal of sealing piston 21 due to valve body 100, and it is partial be pierced by valve body 100,12 center of draining column is along vertical side To equipped with guide hole 14, draining column 12 is located at the part in valve body 100, and excircle is equipped with more than two oil-through-holes 13, leads to oil Hole 13 is connected to the guide hole 14 inside draining column 12, and sealing piston 21 will close to being resisted against on one side on limiting section 15 for hydraulic chamber 1 Hydraulic chamber 1 and spring housing 2 separate, and nose bar 23 is fixed on sealing piston 21 close to the one side of hydraulic chamber 1 and is inserted into guide hole 14.

Nose bar 23 is equipped with concave segment 28, and sealing shroud 27 is socketed in concave segment 28 so that in sealing state, fuel oil is not or not hydraulic chamber 1 It can be revealed from gap of the oil-through-hole 13 with nose bar 23.

One side of the sealing piston 21 far from hydraulic chamber 1 is equipped with counterbore 22, while mitigating 21 own wt of sealing piston Leakproofness of the spring housing 2 relative to hydraulic chamber 1 is increased, is also provided for movement of the sealing piston 21 in spring housing 2 longer It is oriented to distance, valve body 100 is equipped with stop portion 31 in the one side far from sealing piston, and resilient support seat 25 is resisted against stop portion 31 On, and negative pressure chamber 3 and spring housing 2 are separated, resilient support seat 25 is equipped with guide post 26, spring 24 close to the one side of spring housing 2 One end is socketed in the excircle of guide post 26, and the other end is resisted against on the bottom surface of counterbore 22, the side wall surface and guide post of counterbore 22 26 are staggered so that the guiding distance of spring 24 are also extended while the compression travel of spring 24 is unaffected, spring 24 is being pressed It is not likely to produce warpage in compression process, improves the service life of the stability and spring 24 when the work of fuel pressure adapter.

Negative pressure chamber 3 is connected to the inlet manifold of engine through air pressure interface 32, and intake air pressure is applied to elastic force in negative pressure chamber 3 The fuel pressure collective effect in sealing piston 21 is applied in admission pressure and hydraulic chamber 1 on support base 25 in spring 24 On, when engine air throttle aperture gradually becomes small, admission pressure on resilient support seat 25 is applied in negative pressure chamber 3 also therewith Gradually become smaller, the fuel pressure in hydraulic chamber 1 also gradually becomes larger with respect to admission pressure at this time, the also gradually court therewith of sealing piston 21 It is pressed into spring housing 2, nose bar 23 gradually opens oil-through-hole 13, and fuel oil is entered by oil-through-hole 13 in guide hole 14, and through fuel pipe It is back in Engine Fuel Tank, because engine is in actual work, the aperture of air throttle is constantly changed with actual conditions Opening size, thus oil-through-hole 13 along draining column 12 vertical direction be equipped with it is multiple, engine air throttle aperture is smaller, sealing The displacement that piston 21 drives nose bar 23 to generate is more, and the oil-through-hole 13 of opening is also more so that enters in-engine fuel oil Pressure variation synchronous with engine air throttle aperture, improves power performance and the economy performance of the engine under different operating modes.

Other side according to the present utility model, the application also provide engine system as shown in Figure 2, the engine System includes above-mentioned fuel pressure adapter 101 and inlet manifold 102, air throttle 103, air cleaner 104, fuel oil Case 105, tracheae 106, oil return pipe 107, fuel pipe 108 etc., in the course of work of engine system, air is through air cleaner Using the adjusting of air throttle 103 after 104 filterings, into inlet manifold 102, tracheae 106 connects fuel pressure adapter 101 With inlet manifold 102, admission pressure is conducted into the negative pressure chamber of fuel pressure adapter, fuel pipe 108 is suitable through fuel pressure Orchestration 101 connects fuel tank 105 and fueling injection equipment in engine, releases fuel oil and is back in fuel tank 105 through oil return pipe 107.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Utility model spirit and principle within, made by any modification, equivalent replacement and improve etc., should be included in the utility model Protection domain within.

Claims (3)

1. a kind of fuel pressure adapter, which is characterized in that including valve body, hydraulic chamber, spring housing, negative pressure chamber, the hydraulic chamber, Spring housing, negative pressure chamber are all located in valve body, and sealing piston, spring, resilient support seat are equipped in the spring housing, and the sealing is lived Plug separates the hydraulic chamber and the spring housing, and one side of the sealing piston far from hydraulic chamber is equipped with counterbore, the elastic force The one side that support base corresponds to the counterbore is equipped with guide post, and the spring one end is placed in the guide post, and the other end stretches into institute It states in counterbore, the valve body is equipped with limiting section, stop portion, and the sealing piston is resisted against the limit on one side close to hydraulic chamber In portion, the resilient support seat being resisted against on one side on the stop portion far from the spring housing, the negative pressure chamber is equipped with air pressure The spring housing and the negative pressure chamber is isolated in interface, the resilient support seat, and the hydraulic chamber is equipped with fuel feed hole, pressure release column, institute It states fuel feed hole to be located on the side wall of the valve body, the pressure release column is fixed on the bottom surface that the valve body is right against the sealing piston Upper and one end is pierced by the valve body, which is equipped with guide hole in the axial direction, and the pressure release column is located at the hydraulic chamber Partial excircle is equipped with more than two oil-through-holes, which is connected to the guide hole, and the sealing piston is close to described The one side of pressure release column is equipped with a nose bar, which is inserted into the guide hole.

2. a kind of fuel pressure adapter according to claim 1, which is characterized in that the nose bar excircle is along vertical side To equipped with a concave segment, the concave segment is interior to be socketed sealing shroud.

3. a kind of engine system, which is characterized in that the engine system includes that a kind of fuel pressure in claim 1 is suitable Orchestration.