CN2440953Y

CN2440953Y - Assembled piston coupler for pressure fuel jetting pump

Info

Publication number: CN2440953Y
Application number: CN 00225654
Authority: CN
Inventors: 石跃军
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-20
Filing date: 2000-09-20
Publication date: 2001-08-01
Anticipated expiration: 2010-09-20

Abstract

The utility model discloses an assembled plunger coupler for a high pressure fuel oil jetting pump, which can convey diesel oil for an automobile engine and can also convey gasoline. The structure, of the utility model is simple. An oil inlet valve and fittings of the oil inlet valve are additionally arranged in the existing plunger sleeve to form an assembled plunger, and then, the isopyknic combustion process of the gasoline engine is changed into the isopyknic and isobaric combustion process to cause the gasoline to be conveyed into a combustion chamber at different time and in a different amounts to do work. The resulted effect is the same to the effect of a diesel engine. Thereby, the torque of the gasoline engine is improved, the oil consumption is reduced, and the energy is saved. Thereby, a new press ignition type gasoline engine can be researched, manufactured and developed.

Description

Fuel oil high-pressure injection pump combined plunger idol part

The utility model relates to a kind of fuel injection system, especially motor car engine gasoline, diesel oil high-pressure injection pump combined plunger idol part.

The plunger coupled parts of the existing employed high-pressure injection pump of domestic automobile diesel engine can only be made fuel with diesel oil, can not make and use gasoline for the fuel, because of the gasoline generation bubble of very easily vaporizing, when the descending oil suction of injection pump plunger, outlet valve and plunger bushing have formed a seal space, when plunger continues when descending, make the gasoline vaporising in this seal space generate bubble, and in next compression injection stroke, bubble in the plunger bushing also has little time to be full of by the fuel oil that the low pressure oil circuit comes and to get rid of, because of structural reason can't be got rid of bubble in the seal space, at this moment up plunger has been sealed the low pressure oil inlet hole, at this moment during the up boost pressure of plunger because of bubble deformation, outlet valve is not also opened, and when plunger compressing bubble and fuel oil made outlet valve open Injection Pump by the time, the piston in the cylinder had been crossed top dead center, at this moment the gasoline that goes of spirt can not guarantee the motor proper functioning because of timing lag.

For overcoming above-mentioned defective, the purpose of this utility model provides a kind of fuel oil high-pressure injection pump combined plunger idol part, but it not only can be motor car engine conveying diesel oil but also gasoline feed, and simple in structure, improves petrolic moment of torsion, reduces oil consumption.

For achieving the above object, the technical solution of the utility model is: a kind of fuel oil high pressure spray is by pump combined plunger idol part, comprise outlet valve, delivery valve seat, plunger bushing and plunger, it is characterized in that it also comprises oiling valve, the lower end of this oiling valve is goed deep in the plunger and coincide with the internal diameter of plunger center hole constituting combined plunger.Described oiling valve upper end also has spring and fuel-displaced cover, withholds spring on oiling valve by fuel-displaced cover.

In the Injection Pump of this form, the primary component that is used for improving fuel pressure is the plunger coupled parts that plunger bushing and combined plunger are formed, and oiling valve is equipped with in the combined plunger upper end, and good seal when guaranteeing to press oil during the descending oil-feed of plunger, is opened good.There is a hairspring to fasten on the oiling valve and pressing oiling valve, take a seat well to guarantee oiling valve by fuel-displaced cover.The top of plunger bushing has two holes to communicate with the low pressure oil circuit, and a vertical cut groove and the groove of cutting sth. askew are arranged at the top of plunger.Plunger coupled parts is made with superior alloy steel, also is ground to radial clearance at last less than 0.002～0.003 millimeter through heat treatment.

During Injection Pump work, combined plunger is under the effect of the driving of cam of injection pump and piston spring, reciprocating in the plunger bushing of fixing, on plunger coupled parts, pressing outlet valve and valve seat thereof, formed the seal space of pump oil, when plunger moves down, back down oiling valve through the fuel oil that clear device force feed comes by oil inlet hole from oil transfer pump, eliminate vacuum, oil-feed continues up to plunger and arrives lower dead center, when moving up when plunger change direction, oiling valve takes a seat and cuts out, part fuel oil is subjected to blow back into the low pressure oil circuit again after the plunger extruding, till the plunger oil sealing surface covers the oilhole upper limb, after this, because the precision-fit of combined plunger idol part part, plunger continues when up, pressure increased sharply after fuel oil was squeezed, when the pressure of fuel oil reaches the tension force that can overcome oil outlet valve spring and the pressure in the high-pressure oil pipe, outlet valve just is open, fuel oil enters high-pressure oil pipe and oil sprayer through this valve, be that Injection Pump begins fuel feeding, because at this moment pump grease chamber (plunger upper part space) is full of high pressure fuel, so fuel feeding was carrying out when plunger continued to move up always, when the oilhole on the plunger guide bush left side is opened on the spiral chute limit of plunger, the pump grease chamber is communicated with the low pressure oil circuit, high pressure fuel in the pump grease chamber immediately thus orifice flow go out, fuel pressure descends rapidly, and outlet valve takes a seat immediately and cuts out under the effect of spring, and fuel feeding stops at once, though this back-plunger moves on to top dead center on continuing, but fuel oil goes through plunger vertical cut groove flows back to the oil input channel of Injection Pump from left side oilhole, and in whole strokes of plunger, only some is effective delivery stroke, in effective delivery stroke, the amount of fuel that plunger is discharged is exactly the oil mass of Injection Pump supply engine cylinder.

The technical solution of the utility model can also be that oiling valve is hollow T bolt, and its piston center hole by plunger upper end gos deep into the plunger groove of cutting sth. askew.In the Injection Pump of this form, the primary component that is used for improving fuel pressure is that plunger, piston, hollow T type bolt connect the combined plunger that is combined into.

During Injection Pump work, combined plunger is under the effect of the driving of cam of injection pump and piston spring, reciprocating in the plunger bushing of fixing, on plunger coupled parts, pressing outlet valve and valve seat thereof, formed the seal space of pump oil, when combined plunger moves down and during oil-feed, piston rests on top dead center under the vacuum power effect of sealing, and the center hole of oil-feed vertical cut groove on the plunger and piston has constituted an oil input channel, fuel oil enters, vacuum expendable pattern in the pump, plunger continues to move down, interconnect function lower piston at T type hollow bolt is forced to be moved down into lower dead center by plunger, oil-feed also from top dead center until lower dead center, carry up when pressing oil when plunger change direction, move on the plunger with piston and be close to when sealing the low pressure oil input channel, part fuel oil is subjected to blow back into the low pressure oil circuit again after the plunger extruding, till the plunger end face covers left side oil inlet hole upper limb, plunger continues when up, pressure increased sharply after fuel oil was squeezed, when the pressure of fuel oil reached pressure in the tension force that can overcome oil outlet valve spring and the high-pressure oil pipe, outlet valve just was open, and Injection Pump begins fuel feeding.The plunger fuel feeding that continues to move up carries out right, when the oilhole on the plunger guide bush left side is opened at the spiral chute edge of plunger, the pump grease chamber is communicated with the low pressure oil circuit, high pressure fuel in the pump grease chamber by T shape hollow bolt vertical cut passage immediately thus orifice flow go out, fuel pressure descends rapidly, and outlet valve takes a seat immediately and cuts out under the effect of spring, and fuel feeding stops at once, though move on to top dead center on plunger continues, fuel oil goes through plunger vertical cut groove passage flows back to the oil input channel of Injection Pump from left side oilhole.

The utility model is simple in structure, only in original plunger bushing, set up the oil-feed valves and fittings and constitute combined plunger, then can be appearance isobaric combustion processes such as petrol engine isochoric combustion process change one-tenth, make gasoline timesharing calibration be transported to the firing chamber work done, resulting effect is the same with diesel engine, thereby improve petrolic moment of torsion, reduce oil consumption, energy saving.Injection Pump of the present utility model under the effect of speed regulator, can be made oil sprayer and use in pump on existing Spark ignition type petrol engine, identical with the electronic oil injection device of import, thereby replaces Carburetor, reaches the purpose of fuel-economizing.Also can study manufacturing thus, develop compression-ignited petrol engine of new generation.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the generalized section of first embodiment of the utility model;

Fig. 2 is the generalized section of another embodiment of the utility model.

Embodiment 1: as shown in Figure 1, the utility model comprises outlet valve 1, delivery valve seat 2, plunger bushing 6 and plunger 5, also comprises oiling valve 3, and oiling valve 3 upper ends also have spring 7 and fuel-displaced cover 8, and fuel-displaced cover 8 is withheld spring 7 on oiling valve 3.

Embodiment 2: as shown in Figure 2, the utility model comprises outlet valve 1, delivery valve seat 2, plunger bushing 6 and plunger 5, also comprises oiling valve 3, and oiling valve 3 is hollow T bolt, and it gos deep into the groove of cutting sth. askew of plunger 5 by the center hole of plunger 5 upper end pistons 4.

Claims

1, a kind of fuel oil high-pressure injection pump combined plunger idol part comprises outlet valve, delivery valve seat, plunger bushing and plunger, and it is characterized in that: it also comprises oiling valve, and the lower end of this oiling valve is goed deep in the plunger and coincide with the internal diameter of plunger center hole constituting combined plunger.

2, fuel oil high-pressure injection pump combined plunger idol part according to claim 1, it is characterized in that: the oiling valve upper end also has spring and fuel-displaced cover, withholds spring on oiling valve by fuel-displaced cover.

3, fuel oil high-pressure injection pump combined plunger according to claim 1 idol part, it is characterized in that: oiling valve is hollow T bolt, its piston center hole by the plunger upper end gos deep into the plunger groove of cutting sth. askew.