CN101713361A

CN101713361A - Dual delivery valve pair assembly

Info

Publication number: CN101713361A
Application number: CN200910191016A
Authority: CN
Inventors: 邱龙彬; 王亚会; 赖学军
Original assignee: CHONGQING FUEL-OIL JET SYSTEM Co Ltd CHINA HEAVY AUTOMOBILE GROUP
Current assignee: Heavy Oil High Tech Electronic Fuel Injection System Chongqing Co ltd; Heavy Oil High Tech Electronic Fuel Injection System Co ltd
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-05-26
Anticipated expiration: 2029-09-29
Also published as: CN101713361B

Abstract

The invention discloses a dual delivery valve pair assembly, which comprises a one way valve seat, a delivery valve pair, an oil return preventing mechanism and a positioning pin; the upper end face of the one way valve seat is attached to the lower end face of the delivery valve pair, and is fixed through the positioning pin; and the oil return preventing mechanism is clamped in an oil passage YD1 and a spring cavity between the one way valve seat and the delivery valve pair. The dual delivery valve pair assembly has the advantages of improving oil supply amount and preventing fuel oil from returning.

Description

Dual delivery valve pair assembly

Technical field

The present invention relates to a kind of engine oil technology, relate in particular to a kind of dual delivery valve pair assembly.

Background technique

How environmental protection, the energy-conservation world's problem that become specific to automotive industry, improve the efficient of motor, reduce the main direction of studying that disposal of pollutants has become each manufacturer; Effective ways that improve engine efficiency are exactly that the fuel delivery of motor is controlled, and this just need improve engine fuel system, makes the fuel delivery of motor more reasonable.

Summary of the invention

The present invention proposes a kind of dual delivery valve pair assembly, it is made up of unidirectional valve seat, sealed steel ball, spring seat, spring, delivery valve assembly, locating stud;

There is the center hole C that axially runs through unidirectional valve seat at unidirectional valve seat middle part; Be furnished with to the bilateral symmetry of center hole C two oil duct YD1 that axially run through unidirectional valve seat on the unidirectional valve seat, there is a sealing cone at oil duct YD1 middle part, and the oil duct diameter on sealing cone top is greater than the oil duct diameter of sealing cone bottom; Sealed steel ball places the top of sealing cone in the oil duct YD1, sealing cone and sealed steel ball coupling; Spring seat places on the sealed steel ball, and the spring seat lower end surface is provided with the ball-and-socket that is complementary with sealed steel ball;

The delivery valve assembly middle part is provided with the oil road that axially runs through delivery valve assembly, is provided with the outlet valve spool in the oil road, and the conical surface on the outlet valve spool is seated on the conical surface E of oil road opening; Delivery valve assembly 5 bottoms are provided with two spring chambers, and two spring chambers are corresponding one by one with oil duct YD1; The spring upper end is sitting in the spring chamber bottom, and the spring lower end is sitting on the seat surface of spring seat, and spring is in its pre-compressed state; Two spring chambers are communicated with oil road by two oil duct YD2, and oil road is communicated with center hole C;

Fit and fix by locating stud in unidirectional valve seat upper-end surface and delivery valve assembly lower end surface.

Useful technique effect of the present invention is: a kind of dual delivery valve pair assembly that improves fuel delivery, prevents fuel flow returns is provided.

Description of drawings

Fig. 1, structural representation of the present invention;

Fig. 2, structural representation of the present invention two;

Fig. 3, the oil supply system structural representation that adopts structure of the present invention to form;

Fig. 4 to 7, arrangement works process schematic representation of the present invention.

Embodiment

Referring to Fig. 1,2, dual delivery valve pair assembly structure of the present invention is: it forms (wherein, sealed steel ball 2, spring seat 3, spring 4 constitute anti-oil return mechanism) by unidirectional valve seat 1, sealed steel ball 2, spring seat 3, spring 4, delivery valve assembly 5, locating stud 6; Its concrete annexation is as follows:

There is the center hole C that axially runs through unidirectional valve seat 1 at unidirectional valve seat 1 middle part; Be furnished with to the bilateral symmetry of center hole C two oil duct YD1 that axially run through unidirectional valve seat 1 on the unidirectional valve seat 1, there is a sealing cone 7 at oil duct YD1 middle part, and the oil duct diameter on sealing cone 7 tops is greater than the oil duct diameter of sealing cone 7 bottoms; Sealed steel ball 2 places the top of sealing cone 7 in the oil duct YD1, sealing cone 7 and sealed steel ball 2 couplings; Spring seat 3 places on the sealed steel ball 2, and spring seat 3 lower end surfaces are provided with the ball-and-socket that is complementary with sealed steel ball 2; Delivery valve assembly 5 middle parts are provided with the oil road 9 that axially runs through delivery valve assembly 5; It is corresponding with oil duct YD1 respectively that delivery valve assembly 5 bottoms are provided with 8, two spring chambers 8 of two spring chambers; Spring 4 upper ends are sitting in spring chamber 8 bottoms, and spring 4 lower ends are sitting on the seat surface of spring seat 3, and spring 4 is in its pre-compressed state; Two spring chambers 8 are communicated with oil road 9 by two oil duct YD2, and oil road 9 is communicated with center hole C; Oil road 9 upper end open places are conical surface E; Fit and are fixing by locating stud 6 in unidirectional valve seat 1 upper-end surface and delivery valve assembly 5 lower end surfaces.

Referring to Fig. 3, the oil supply system structure that is made of dual delivery valve pair assembly of the present invention is: it comprises: oil jet pump body 101, plunger bushing 102, plunger 103, delivery valve holder 104, dual delivery valve pair assembly 105, oil outlet valve spring 106, piston spring 107, outlet valve spool 108, cam mechanism; Its annexation is:

Delivery valve holder 104 is arranged on plunger bushing 102 upper ends and dual delivery valve pair assembly 105 is pressed abd fixed in the inner chamber on plunger bushing 102 tops; Plunger bushing 102 is arranged on oil jet pump body 101 upper ends, and dual delivery valve pair assembly 105 is communicated with the plunger cavity (center hole C is communicated with plunger cavity, and the oil road 9 on the delivery valve assembly 5 is communicated with delivery valve holder 104 inner chambers) in delivery valve holder 104 and the plunger bushing 102; Slide in the plunger cavity of plunger 103 in plunger bushing 102; Outlet valve spool 108 bottoms cooperate with the mesopore of oil road 9, the conical surface E that the conical surface on the outlet valve spool 108 is seated at oil road 9 upper ends goes up (being used for oil sealing), oil outlet valve spring 106 is arranged in the inner chamber of delivery valve holder 104, oil outlet valve spring 106 is in its pre-compressed state, the precompression of oil outlet valve spring 106 is pressed to conical surface E with outlet valve spool 108, and pushes against sealing with conical surface E; Leave the space between dual delivery valve pair assembly 105 bottom peripheries and the plunger bushing 102 inner chamber bottoms, this space is the peripheral ring-like low-pressure cavity B that forms in dual delivery valve pair assembly 105 bottoms; With on plunger bushing 102 outer walls of corresponding part, low-pressure cavity B position a ring groove is arranged, the space that this ring groove and oil jet pump body 101 inwalls are enclosed forms low-pressure cavity D, there is the oil duct YD3 that radially runs through plunger bushing 102 corresponding position on the plunger bushing 102, and oil duct YD3 is communicated with low-pressure cavity B and low-pressure cavity D; Oil jet pump body 101 is provided with oil duct YD4, and oil duct YD4 is communicated with the oil-feed oil duct on low-pressure cavity D and the oil jet pump body 101; The plunger cavity in the plunger bushing 102 and the space of dual delivery valve pair assembly 105 joints form hyperbaric chamber A; Plunger 103 lower ends are connected with cam mechanism by spring lower seat, and piston spring 107 withstands on the spring lower seat, and the restoring force of piston spring 107 acts on spring lower seat, thereby apply a downward pressure to plunger 103; Plunger 103 to-and-fro motion under the effect of cam mechanism and piston spring 107.

Working principle of the present invention:

When state of rest, because sealed steel ball 2 is subjected to being transmitted by spring seat 3 pressure of spring 4, at this moment, sealed steel ball 2 is fitted fully with sealing cone 7, and oil duct YD1 is sealed;

During working state, the action of dual delivery valve pair assembly is divided into several stages:

Phase I, to hyperbaric chamber A towards oily process, the oil that enters oil duct YD1 from low-pressure cavity B is more and more, fuel pressure constantly increases in the oil duct YD1, when the fuel pressure that acts on sealed steel ball 2 bottoms during greater than spring 4 restoring forces, sealed steel ball 2 breaks away from sealing cone 7, and fuel oil enters center hole C by spring chamber 8 and oil duct YD2, thereby enters hyperbaric chamber A;

Second stage, after fuel oil enters the hyperbaric chamber A of center hole C below, along with moving up of plunger 103, oil pressure in the hyperbaric chamber A raises rapidly, oil pressure in the spring chamber 8 also increases, oil pressure in the spring chamber 8 pushes against sealed steel ball 2 and sealing cone 7 with spring 4, at this moment, because the sealing process of sealed steel ball 2 and sealing cone 7, fuel oil can not pass back into low-pressure cavity B by oil duct YD1, fuel oil only can rush at the outlet valve spool 108 in the oil road 9, when oil pressure pressure during greater than the suffered precompression of outlet valve spool 108 (this precompression is mainly provided by the pre-jacking force of outlet valve spool 108 self gravitations and oil outlet valve spring 106), the conical surface of outlet valve spool 108 breaks away from conical surface E, and high pressure fuel flows into delivery valve holder 104, incoming oil rail then by delivery valve assembly 5;

Phase III, after outlet valve spool 108 was backed down, fuel oil was by the incoming oil rail, and oil pressure descend rapidly in the oil road 9, and outlet valve spool 108 is because the effect of oil outlet valve spring 106 restoring forces falls after rise to conical surface E and with oil duct seals; Second and the phase III, sealed steel ball 2 is fitted with sealing cone 7 all the time, and hyperbaric chamber A and low-pressure cavity B are separated, and has kept the residual pressure of setting among the hyperbaric chamber A, prepares for next fuel feeding circulates.

The front is the course of action of introducing stage by stage of the present invention, one-time continuous course of action of the present invention is as follows: as shown in Figure 4, low-pressure cavity B has just begun when oil-filled, sealed steel ball 2 is fitted with sealing cone 7, fuel oil can't enter hyperbaric chamber A, continuation is oil-filled to low-pressure cavity B, fuel pressure in the low-pressure cavity B increases, when its power that acts on sealed steel ball 2 is enough to overcome making a concerted effort of spring 4 precompressions and Residual oil pressure, sealed steel ball 2 leaves sealing cone 7, as shown in Figure 5, fuel oil is by oil duct YD1, spring chamber 8, oil duct YD2 and center hole C enter hyperbaric chamber A, and when plunger 103 moves up, the fuel oil in the hyperbaric chamber A is pressurized, the moment of making a concerted effort of hyperbaric chamber A fuel pressure and spring 4 restoring forces this moment increases, overcome fuel pressure in the low-pressure cavity B and acted on power on the sealed steel ball 2, sealed steel ball 2 is pushed to sealing cone 7, and sealed steel ball 2 and sealing cone 7 are fitted, as shown in Figure 6, end is oil-filled to hyperbaric chamber A; When plunger 103 continues up to move, as shown in Figure 7, when the interior fuel pressure of high-voltage oil cavity A increases to greater than the restoring force of oil outlet valve spring 106, conical surface E opens, high pressure fuel flows into delivery valve holders 104 by oil road 9, and incoming oil rail then is when fuel pressure drops to restoring force less than oil outlet valve spring 106 in hyperbaric chamber A, conical surface E closes, and finishes fuel feeding.

Claims

1. dual delivery valve pair assembly, it is characterized in that: it is made up of unidirectional valve seat (1), sealed steel ball (2), spring seat (3), spring (4), delivery valve assembly (5), locating stud (6);

There is the center hole (C) that axially runs through unidirectional valve seat (1) at unidirectional valve seat (1) middle part; Be furnished with to the bilateral symmetry of the last center hole (C) of unidirectional valve seat (1) two oil ducts (YD1) that axially run through unidirectional valve seat (1), there is a sealing cone (7) at oil duct (YD1) middle part, and the oil duct diameter on sealing cone (7) top is greater than the oil duct diameter of sealing cone (7) bottom; Sealed steel ball (2) places on the interior sealing cone of oil duct (YD1) (7), sealing cone (7) and sealed steel ball (2) coupling; Spring seat (3) places on the sealed steel ball (2), and spring seat (3) lower end surface is provided with the ball-and-socket that is complementary with sealed steel ball (2);

Delivery valve assembly (5) middle part is provided with the oil road (9) that axially runs through delivery valve assembly (5), is provided with outlet valve spool (108) in the oil road (9), and the conical surface on the outlet valve spool (108) is seated on the conical surface (E) of oil road (9) opening; Delivery valve assembly (5) bottom is provided with two spring chambers (8), and two spring chambers (8) are corresponding one by one with oil duct (YD1); Spring (4) upper end is sitting in spring chamber (8) bottom, and spring (4) lower end is sitting on the seat surface of spring seat (3), and spring (4) is in its pre-compressed state; Two spring chambers (8) are communicated with oil road (9) by two oil ducts (YD2), and oil road (9) is communicated with center hole (C);

Fit and are fixing by locating stud (6) in unidirectional valve seat (1) upper-end surface and delivery valve assembly (5) lower end surface.