CN2293653Y - Engine lean combustion auxiliary apparatus - Google Patents

Abstract

The utility model relates to an engine thin combustion auxiliary device. The utility model is characterized in that an auxiliary device is additionally arranged in a pipe passage of a positive crank case ventilation system; a micro passage and a valve device are arranged in a main body of the auxiliary device, wherein the micro passage is positioned in a normal open state and guides micro air to directly enter a suction manifold for diluting mixture air which is too concentrated and is supplied by the positive crank case ventilation system. The other valve device regulates air in proper quantity for lead in following the change of the pressure difference of the suction manifold. The micro passage prompts a pipe passage between an air manifold and the auxiliary device to keep a normal open state. A guide valve device generates the regulation of section areas instantly following the change of the vacuum of the suction manifold, and thus, air in proper quantity directly enters the suction manifold for diluting mixture air which is too concentrated, the mixture ratio between oil and the air is controlled to approach to the optimal value of 1: 14.7 before the air enters a combustion chamber, fuel oil is prompted to be fully combusted, and the combustion efficiency of an engine is effectively improved.

Description

Engine lean combustion auxiliary device

The utility model is relevant a kind of engine combustion device, refer to especially a kind of have regulate air and directly enter auxiliary device in the inlet manifold, allow oil gas mixing ratio enter to be controlled at before the firing chamber perfect condition.

General motor is at circulation time, must there be air in crankcase, to turn round, moisture in the crankcase and gasoline vapour need take away by a system, otherwise this moisture and gasoline vapour can generate to fall into oblivion in crankcase and flood and acids, can make that lubricating oil is defeated manages obturation and metal etch; Moisture and gasoline vapour in this crankcase directly drain in the air and can cause atmospheric pollution; For preventing pollution problem, in crankcase, add a worn-out close ventilation system, be connected to inlet manifold via conduit, enter combustion chambers burn.

This crankcase imports the air of inlet manifold through conduit, as supply too much can cause oil gas mixing ratio cross rare and running not good; Therefore install a positive crankcase vent valve additional at the outlet end of crankcase and regulate the amount that exhaust gases is passed through; This positive crank box ventilation valve cooperates the pull of vacuum of intake manifold to regulate, and does not have excessive exhaust gases and enters in the intake manifold, and this regulating system is just like the 3rd, 646, No. 925 patent documentation contents of the U.S..

When engine operates, cross rare sudden and violent earthquake situations shape that causes for preventing oil gas mixing ratio, the oil gas mixing ratio of general engine all is lower than 1: 14.7, again along with different operating states and oil path control system delay close, often cause oil-way system to supply excessive situation, especially be promptly to slow down or when closing the throttle valve descending, because of being blocked, ambient air enters Carburetor, and oil circuit still is in the fuel feeding stage, pressure in the intake manifold is positioned at high vacuum state, and the firing chamber is promptly because of can't perfect combustion producing a large amount of black smokes.

Existing american documentation literature 3,463,132 skill that disclose of said circumstances solve intake manifold caused partial combustion situation when promptly slowing down or close the throttle valve descending; This skill is to filter the exhaust gases that positive crank box ventilation system imports earlier with a filtering device, utilize ball valve and spring in the vacuum breaker valve body again, can not operate under normal running at engine, unless the degree of vacuum of intake manifold is too high, vacuum valve can not opened otherwise this opens circuit; Under the normal condition of quickening and slowing down, during along the road travel of a straight, flat, the too high situation of degree of vacuum can not take place in intake manifold, yet, if promptly slow down or during the throttle down descending, just caused condition of high vacuum degree can draw back ball valve and import outside air vacuum breaker generation effect in the intake manifold, the mixed gas of dilution supply overrich prevents the discharge of a large amount of black smokes.

Though disclosing, above-mentioned skill have the center of a main valve body to be provided with a path, be provided with in this path with spherical valve seat, be held in the surface of round by a spring, form a valve body with regulating action, only this vacuum breaker (in mercury pressure of 17 to 22 inches (432 to 559mm)) when the engine normal running turn round can not produce action, only is lifted at the high beginning of 23 to 25 inches (584 to 635mm) mercury column in vacuum values moment of intake manifold and produces and move.

Its main purpose of the auxiliary device that the utility model provides, be to solve the car engine oil circuit between the variation of moment acceleration, deceleration, to cause oil path control system and air supply ratio of mixture the situation of overrich to occur, the an amount of air of in good time importing, the mixed gas of dilution supply overrich, allow oil gas mixing ratio before entering the firing chamber, control approaches to optimal 1: 14.7, impels fuel oil to reach the perfect combustion state, effectively improves engine combustion efficient.

Its secondary objective of the auxiliary device that the utility model provides, it is the micro-path that utilizes one group of supply micro-air, the air of guiding trace directly enters intake manifold, dilute outside the exhaust gases of positive crank box ventilation system supply, and impel the pipeline between intake manifold and auxiliary device to keep a normal open state, and along with the vacuum pressure reduction variation of intake manifold, the adjusting of moment pilot valve device generation sectional area, allow an amount of air directly enter in the intake manifold, the mixed gas of dilution supply overrich.

Its purpose once more of the auxiliary device that the utility model provides, be to utilize the micro-path that is normal open state, provide and form a unobstructed path between intake manifold and auxiliary device, no matter at low speed, at a high speed, the excessive situation of the caused fuel feeding of instantaneous variation of refueling starting or slowing down, can both be according to the instantaneous variation of air-distributor vacuum suction, moment imports an amount of air and enters in the intake manifold, to reduce the atmospheric pollution that causes because of oil gas mixing ratio is too high.

Its purpose again of the auxiliary device that the utility model provides, it is the pipeline that is between intake manifold and auxiliary device, change by the vacuum pressure reduction of normal open trace path along with intake manifold, directly control valve unit is exerted an influence for the pressure in the intake manifold, control valve device imports the required air quantity of dilution supply Over-rich mixture.

Cooperation illustrates as follows with regard to the utility model:

Fig. 1 is a sectional drawing of the present utility model, shows the structure of auxiliary device.

Fig. 2 is an assembly exploded view of the present utility model.

Fig. 3 is a valve seat parts drawing of the present utility model, shows that valve face is provided with the situation of micro-path.

Fig. 4 is a sectional drawing of the present utility model, shows micro-path second embodiment.

A kind of engine lean combustion auxiliary device, it is in the connecting end of engine air admittance manifold, connects for the pipeline and the auxiliary device pipeline of the present utility model of positive crank box ventilation system respectively with the trident connecting tube; Shown in figure one, an end of this pipeline is to be connected on the pipe joint 42 of auxiliary device 11, and this auxiliary device 11 is fixed in the suitable space of engine outer rim by dress again; This auxiliary device 11 is positioned at control valve unit 16 and one group of micro-path 27 that is the supply of normal open state guiding micro-air that body 12 is respectively equipped with one group of control air mass flow, when engine runs well, utilize the air of micro-path 27 guiding trace directly to enter intake manifold, dilute outside the exhaust gases of positive crank box ventilation system supply, impel the pipeline of 11 of intake manifold and auxiliary devices to keep a normal open state, vacuum pressure reduction variation along with intake manifold, moment, pilot valve device 16 produced the adjusting of sectional areas, allow an amount of air directly enter in the intake manifold, the mixed gas of dilution supply overrich, allow oil gas mixing ratio before entering the firing chamber, control was near optimal 1: 14.7, impel fuel oil to reach perfect combustion, effectively improve the combustion efficiency of engine.

See also Fig. 1 to Fig. 3, engine lean combustion auxiliary device 11 of the present utility model, it is to be provided with a cylindrical shell 56 in body 12 outer rims, and these housing 56 central authorities are provided with a cylindrical shell 19, and this cylindrical shell 19 is reined in plate 21 with 56 of housings by plural number and is separated into several clearance spaces 22; The inner edge that this cylindrical shell 19 is positioned at cylndrical surface 20 is provided with locating column 24 and through hole 23, and outer rim is provided with screw thread 25 and cylinder 26, screws togather wherein for a control valve unit 16; The end outer rim that this body 12 is positioned at housing 56 is provided with outside thread 17, and the internal thread 41 of sheathed leak-proof gasket 38 of port and loam cake 13 is spirally connected and is combined as a whole; The outer rim of this loam cake 13 is provided with the pipe joint 42 of symmetry, and wherein a pipe joint is closed, and pipe joint central authorities are provided with path 43, and the pipe joint 42 with path 43 is connected on the Y-pipe joint of intake manifold outer end with pipeline; The other end outer rim that this body 12 is positioned at housing 56 is provided with outside thread 18, and port is spirally connected for the internal thread 54 of lower cover 14, and is ccontaining for filtrating equipment 15 by the room in the lower cover 14 52, as the usefulness of filtered air.

This spiral shell is located at the control valve unit 16 of cylindrical shell 19 open ports, include assemblies such as spring 31, ball 32, O type ring 33 and valve seat 34, wherein this spring 31 is 20 spaces, cylndrical surface that are placed in cylindrical shell 19, and an end is held in locating column 24 outer rim planes, in addition end holding for ball 32; The outer rim of this valve seat 34 is respectively equipped with annular groove 61 and screw thread 60, locatees and is screwed together on the screw thread 25 and cylinder 26 of 20 outer ends, cylndrical surface for O type ring 33.

Valve seat 34 spiral shells of this control valve unit 16 are located at the screw thread 25 of cylndrical surface 20, the tension force of spring 31 is through after adjusting, for preventing that the Consumer from adjusting the tension force of spring 31 arbitrarily, cause abnormal air supply, on the seat surface 30 of control valve unit 16 outer rims, this fixed plate 44 is provided with the circular hole 46 of air ventilation with fixed plate 44 clinchings that are preset with locating column 45 and circular hole 46.

This valve seat 34 is positioned at central authorities and is provided with a post hole 37, and an end in this post hole 37 is provided with a valve face 36, and end is provided with grooving 62 in addition; This valve seat 34 is that spiral shell is located on the screw thread 25 of body 12 cylndrical surface 20 ports, the ball 32 that is positioned at cylndrical surface 20 is held by spring 31, contact and seal with the valve face 36 of valve seat 34, the tension force of this spring 31 is arranged by valve seat 34 spirals, according to different cars is the former car vacuum values height when running well, and adjusts the elasticity of spring 31.

This control valve unit 16 is during along with the engine normal operation, in different road driving situations, can both be according to the moment of intake manifold pressure reduction variation, import an amount of air and enter intake manifold, therefore, on the valve face 36 of valve seat 34, be provided with a vent slot 58 at least, when ball 32 and valve face 36 are closed state, enter intake manifold with micro-path 27 guiding micro-airs, impel the pipeline of 11 of intake manifold and auxiliary devices to keep a normal open path.

When the engine normal operation, the pressure reduction in the intake manifold changes along with different road conditions, and when idling (throttle valve complete shut-down), the pull of vacuum in the intake manifold is about 432 to 559mm mercury column height; When full trrottle, the pull of vacuum in the intake manifold can be reduced to 100mm or following mercury pressure; When throttle valve by opening state, moment is when closing (moment is decontroled throttle), the pull of vacuum in the intake manifold can must be raised to 584 to 635mm mercury column height rapidly.

When the ball 32 and normal the reaching of 34 runnings of valve seat of control valve device 16 are stablized, opening point with 34 of ball 32 and valve seats is adjusted to suitable mercury column high position (as being benchmark with 100mm mercury column height) in advance, the vacuum values of this intake manifold is higher than the 100mm mercury column when high, this ball 32 promptly produces start with valve seat 34, imports suitable air and directly enters intake manifold; When the vacuum values of intake manifold is lower than the 100mm mercury column when high, 36 of this ball 32 and valve faces are closed condition, directly enter intake manifold by the micro-path 27 guiding micro-airs of vent slot 58, dilute the exhaust gases that positive crank box ventilation system modulating valve imports.

Be arranged at the vent slot 58 of valve face 36, as long as under the situation that engine runs well, the capital imports outside air and directly enters intake manifold, form a unimpeded path, when the vacuum values of intake manifold changes, outside an amount of mixed gas of path supply by Carburetor, positive crank box ventilation system is also controlled the amount that exhaust gases imports; When the air-distributor vacuum value is higher than the 100mm mercury column when high, the ball 32 of control valve unit 16 is promptly drawn back, and along with the vacuum values of intake manifold is just adjusted the sectional area of 36 of ball 32 and valve faces, guides an amount of air and enters intake manifold.

This control valve unit 16 is positioned at valve face 36 vent slot 58 is set at least, be lower than the 100mm mercury column when high in the air-distributor vacuum value, with normal open state micro-air is directly imported in the intake manifold via pipeline, dilute positive crank box ventilation system and import the interior exhaust gases of intake manifold; This trace path 27 provides auxiliary device 11 to the pipeline between intake manifold to become a unimpeded path, along with the moment of air-distributor vacuum pressure reduction variation, the sectional area that ball 32 and valve face are 36 changes along with vacuum values and regulates, do not have the phenomenon of any sluggishness, allow an amount of outside air directly import intake manifold, help the burning of engine.

The utility model is positioned at the micro-path 27 that control valve unit 16 is provided with, except that the valve face 36 in valve seat 34 is provided with a vent slot 58 at least, as shown in Figure 4, a kind of is in flat board 57 positions of 56 of cylindrical shell 19 cylndrical surface, 20 ports and housings, be provided with an aperture that runs through 29, this aperture 29 is identical with the function that valve face 36 is provided with a vent slot 58 at least; Directly import intake manifold in via pipeline micro-air with normal open state, dilute positive crank box ventilation system and import the interior exhaust gases of intake manifold, and the required air quantity when being lower than 100mm or following mercury pressure of the pull of vacuum in the intake manifold, and impel the pipeline of intake manifold to 11 of auxiliary devices, lifting and variation along with air-distributor vacuum pressure reduction, moment pilot valve device 16 the ball 32 and adjusting of 36 of valve faces, allow an amount of air directly enter in the intake manifold, the mixed gas of dilution supply overrich, allow oil gas mixing ratio before entering the firing chamber, control approaches to optimal 1: 14.7, reduces the generation of waste gas such as HC and CO.

The structure of the utility model beyond control valve unit 16 increased the micro-path 27 of one group of normal open state, though the structure of the spring 31 of control valve unit 16, ball 32 and valve face 36, used widely, belong to common technology, but belong to the outfit of former car because of the pipeline of positive crank box ventilation system, the pipeline length of former car and winding space are restricted and do not destroy the principle of former vehicle device, auxiliary device 11 of the present utility model is connected on the trident connecting tube of intake manifold connecting end with the pipeline of a suitable length, and does suitable fixing by dress in engine outer rim appropriate location; The unlatching that the ball 32 of control valve unit 16 and valve face are 36 along with the setting of micro-path 27, is lower than mercury column below the 100mm when high with the pull of vacuum of regulating intake manifold, guides an amount of ambient air and enters intake manifold; This trace path 27 provides a unimpeded path simultaneously, be higher than the mercury column height of 100mm when above in the pull of vacuum of intake manifold, the sectional area that ball 32 and valve face are 36 changes along with intake manifold pressure reduction along with opening and regulating, and does not have the phenomenon of any sluggishness.

The utility model is illustrated respectively by the foregoing description, complete announcement feature of the present utility model and structural relation, significantly know the improvement of the existing conspicuousness of this case, and through the real vehicle test, after confirming that the utility model is set up a micro-path, can effectively reduce the generation of waste gas really, increase the combustion efficiency of engine, non-by the same trade precognition and the invention that can reach easily, structure also has its originality is arranged.

Claims (3)

1. engine lean combustion auxiliary device, it mainly is made up of assemblies such as body, lower cover, filtrating equipment, control valve units, wherein this body outer rim is a cylindrical shell, central authorities are provided with a cylindrical shell that supplies control valve unit to be spirally connected, the upper end and the loam cake of this body are spirally connected, the loam cake outer end is connected to pipeline on the joint of intake manifold outside by pipe joint, and the lower cover that the lower end of this body and is provided with filtrating equipment is spirally connected; This control valve unit includes spring, ball, O shape ring and valve seat, and this spring is placed in the space, cylndrical surface of cylindrical shell, and an end is held in locating column outer rim plane, in addition end holding for ball; The outer rim of this valve seat is provided with annular groove and screw thread, for O shape loop mapping and be screwed together in the screw thread and the cylinder of outer end, cylndrical surface;

It is characterized in that auxiliary device is positioned at body interior and is provided with a control valve unit and a micro-path, wherein this control valve unit is to be provided with a spherical valve face in the valve seat inner edge, this sphere valve face contacts with the sphere of ball, the end in addition of this ball is held by spring, be positioned on the spherical valve face of valve seat and be provided with a vent slot at least, when the valve face of ball and valve seat is closed state, enter in the intake manifold for the micro-air guiding with a micro-path, make the pipeline between intake manifold and auxiliary device keep a normal open state, flow sectional area between the spherical valve face of this control valve unit and the sphere of ball, along with the moment of air-distributor vacuum pressure reduction variation, guide the air-flow of circulation by the micro-path of normal open state, impel the sectional area adjusting between ball and valve face smooth and easy, directly import intake manifold, the mixed gas of dilution supply overrich for an amount of air.

2. according to the described engine lean combustion of claim 1 auxiliary device, it is characterized in that, the control valve unit and the micro-path that are provided with of this auxiliary device wherein, a kind of is to be provided with a vent slot on the valve seat valve face of control valve unit at least, when ball and valve face are closed state, by forming a micro-path between sphere and vent slot, this trace path directly imports in the intake manifold via pipeline for micro-air with normal open state.

3. according to the described engine lean combustion of claim 1 auxiliary device, it is characterized in that, the control valve unit and the micro-path that are provided with of this auxiliary device wherein, a kind of is that the control valve unit spiral shell is located on the cylindrical shell, be positioned between the housing of body outer rim and cylindrical shell and be provided with flat board, be positioned at dull and stereotyped appropriate location and be provided with an aperture that runs through and become a micro-path, this trace path directly imports in the intake manifold via pipeline for micro-air with normal open state.

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