CN101235738A

CN101235738A - Engine air admittance regulation system

Info

Publication number: CN101235738A
Application number: CNA2007100065491A
Authority: CN
Inventors: 陈葆徕
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-02
Filing date: 2007-02-02
Publication date: 2008-08-06
Anticipated expiration: 2027-02-02
Also published as: CN101235738B

Abstract

An engine air-in control system is disclosed, which utilizes that an air-in control device is connected with a respiratory flexible pipe of the engine, and is used for sucking air leakage of the respiratory flexible pipe of the engine to mix with outer gas, and then the mixed gas is sent to the engine to rekindle, wherein the air-in control device is provided with a pressure induction valve, a suction port, a core vent and a pore which is connected with sub-atmospheric pressure, wherein the core vent and the pore which is connected with sub-atmospheric pressure are directly or indirectly communicated with an air inlet of the engine to produce pressure difference change by utilizing the change of the air-in speed of the engine in order to close or change the opening amplitude of the pressure induction valve, the better air-in control device is provided with an adjusting button which controls opening limiting of the valve and enables the air-in control device to be suitable for the engine air-in control with various inspiratory capacity.

Description

Engine air admittance regulation system

Technical field

The present invention is relevant for a kind of engine air admittance regulation system, particularly relevant for a kind of make engine tell gas leakage via an air-regulating valve and the engine air admittance regulation system of sending into engine combustion after ambient air mixes again.

Background technique

Be equipped with PCV system on the rocker arm cover of car engine, (Positive Crankcase Ventilation, PCV), the PCV device is located between crankcase through hole and the intake manifold usually generally to be referred to as the active type crankcase bleeder.

The purpose of PCV device is set, be to make the gas [containing harmful gas such as hydrocarbon (HC) and carbon monoxide (CO)] that leaks into from the engine combustion chamber in the crankcase, directly do not entered in the atmosphere, and the suction when utilizing engine air admittance sucks the firing chamber with it from intake manifold and burns once again.The automobile that present various countries are produced is in order to reduce pollution, regulation must be installed the PCV device of pump circulation ventilation, hydrocarbon (CH) that be harmful to health and carbon monoxide compounds such as (CO) the suction cylinder that is produced in the crankcase can be burnt once again, avoid directly putting ease and in atmosphere, cause atmospheric pollution.

By the common restriction of general traditional Carburetor engine, no matter single valve or hyperpneustic engine, the approximately only 1/100 second actuation time of ON/OFF of valve, wherein the time of valve ON accounts for 30% when engine speed arrives 3000rpm, and the time of valve OFF accounts for 60%.Therefore the car engine developer constantly studies how to supply " effectively reaching enough air " in a flash in the valve air inlet.

In view of this, in the streets existing a kind of engine air inlet adjusting device 1 (as shown in Figure 2) is connected with the air pipe line of engine and constitutes an engine air admittance regulation system (as shown in Figure 1).Wherein engine air inlet adjusting device 1 contains a housing 11, a pair of

spring

12 and 13, a valve piston 14 and valve adjustment button 15.On housing 11, also be provided with the pore 112 of an inlet hole 110, an air outlet hole 111 and a connection negative pressure.Wherein valve piston 14 can be installed in the housing 11 slidingly back and forth and form a valve, one end is airtight slide part 141, the surface is nested with a plurality of

airtight seal rings

142 and 143, by described a plurality of

airtight seal rings

142 and 143 slide part 141 and housing 11 inner maintenances is slidingly matched airtightly.The other end of valve piston 14 is provided with a conical surface 144 and can connects airtight with housing 11.

The elastic force of spring 13 should so that keep connecting airtight with housing 11 by the conical surface 144 of the elastic force official post valve piston 14 between

spring

12 and 13, block the air-flow between inlet hole 110 and the air outlet hole 111 greater than spring 12.

When engine 2 piston action, air can suck by the air-strainer 21 from Fig. 1, is sucked engine through airduct 210, closure 22, intake manifold 23 from suction port 20.The tradition Carburetor is to suck fuel oil automatically by venturi principle (venture tube), novel EFI engine then utilizes electronic control unit (ElectronicControl Unit, ECU) the detecting result according to Air flow meter (AFM) 220 controls fuel nozzle, allows fuel oil and air keep certain ratio and mixes from entering gas port 20 and enter engine combustion and produce power.

Above the liquid level of engine 2 crankcase inner engine oils, be provided with a hole in order to connect breathing hose 24 with airduct 210 in outer gas phase logical, can keep pressure and extraneous barometric pressure balance in the crankcase whereby.Telling in the crankcase leaked gas, and some can enter airduct 210 through this breathing hose 24, enters intake manifold 23 with air again, and another partly then enters the suction port 20 of engine 2 via PCV device 25, intake manifold 23.

Please get back to Fig. 1, engine 2 intake manifold 23 that illustrate among the air outlet hole 111 of existing engine air inlet adjusting device 1 and Fig. 1 communicate.When car steering person tramples throttle and quickens, tracting mechanism on the car can make closure 22 open, the piston of engine 2 sucks more air because of accelerated motion from intake manifold 23, so cause the pressure of air outlet hole 111 ends to descend, therefore airtight slide part 141 two ends of valve piston 14 upper ends produce pressure difference, the strength of pressure difference and spring 12 is down passed valve piston 14 jointly whereby, so will cause the conical surface 144 of valve piston 14 to move down and Open valve, make outer gas from inlet hole 110 via air outlet hole 111, intake manifold 23 and suction port 20 are inhaled into engine, provide burning required effective and enough air.Gas outside suction is unclean, inlet hole 110 need connect an air-strainer 1101 usually again, so as to protection engine air inlet adjusting device 1 and engine 2.

In actual operation, find that existing engine air admittance regulation system shown in Figure 1 has following shortcoming:

1. the oil gas that leaks into crankcase from the engine combustion chamber directly enters airduct and intake manifold 23 from breathing hose 24, and chance cool air temperature descends and condenses on the tube wall, causes the grunge pollution that can't remove.

2. but the used engine air inlet adjusting device 1 of existing system can't effectively be adjusted the open limit of valve piston 14, to adapt to the engine air admittance demand of all different sizes.

Summary of the invention

Technical problem to be solved by this invention is to propose a kind of engine air admittance regulation system for the shortcoming of avoiding occurring in above-mentioned existing system, utilize an air inlet regulating device to be connected with the breathing hose of an engine, mix with outer gas in order to the gas leakage of telling that sucks in the engine breathing hose, and then mixed gas is sent into engine rekindle, this air inlet regulating device is provided with a pressure sensitive valve, one inlet hole, one air outlet hole and one connects the pore of negative pressure, wherein the pore of air outlet hole and connection negative pressure can directly or indirectly communicate with the suction port of engine, produce pressure reduction so as to the variation that utilizes engine air admittance speed and change, allow the pressure sensitive valve be closed or change its unlatching amplitude.

A kind of engine air admittance regulation system provided by the invention comprises that an engine air inlet adjusting device is connected with the inlet air pathway of an engine, and this engine air inlet adjusting device contains:

One inlet hole connects the breathing hose of an air-strainer and this engine, and communicates with the crankshaft room of this engine via the breathing hose of this engine;

One air outlet hole communicates with the suction port of this engine;

One connects the pore of negative pressure, communicates with the suction port of this engine; And

One pressure sensitive valve, the pore that utilizes this air outlet hole to be connected negative pressure with this provide pressure difference to drive, in order to change the path size between this inlet hole and this air outlet hole.

The preferably also can be provided with the adjustment button that a control valve is opened the limit in air inlet regulating device, make air inlet regulating device can be applicable to the engine air admittance adjusting of different gettering quantities.

By the air inlet adjustment of native system, engine sucks the gas leakage of blowing in an amount of cool exterior air and the crankcase in moment, enters firing chamber fully burning again, and its advantage comprises:

1. cool air reduces the engine combustion room temperature, therefore reduces the discharging of NOx.

2. cool air reduces the engine combustion room temperature, therefore improves engine volumetric efficiency＜volumetricefficiency 〉, increase engine torque.

3. an amount of outside air enters the firing chamber, and moment is improved the phenomenon of incomplete combustion, reduces the discharging of hydrocarbon (HC) and carbon monoxide harmful exhausts such as (CO), reduces atmospheric pollution.

4. outside air enters the firing chamber without Air flow meter (AFM), can reduce fuel injection quantity.

5. blowing in the change breathing hose leaked gas and entered the path of inlet manifold, change by engine air inlet adjusting device suction of the present invention with after outer gas mixes and enter inlet manifold again, the unlikely pollution air intake pipe of its oil gas that spues, and, can reduce oil spout by of the detecting of this pipe inhaled air without AFM.

Description of drawings

Fig. 1 is existing engine air admittance regulation system schematic representation.

Fig. 2 is the air-regulating valve sectional drawing of existing engine air admittance regulation system.

Fig. 3 is an engine air admittance regulation system embodiment schematic representation of the present invention.

Fig. 4 is the alternate embodiment schematic representation of engine air admittance regulation system of the present invention.

Fig. 5 is another alternate embodiment schematic representation of engine air admittance regulation system of the present invention.

Fig. 6 is an alternate embodiment schematic representation again of engine air admittance regulation system of the present invention.

Fig. 7 is the air-regulating valve embodiment sectional drawing of engine air admittance regulation system of the present invention.

Fig. 8 is the air-regulating valve alternate embodiment sectional drawing of engine air admittance regulation system of the present invention.

Fig. 9 is another alternate embodiment sectional drawing of air-regulating valve of engine air admittance regulation system of the present invention.

The primary component symbol description

1 engine air inlet adjusting device, 2 engines

3 engine air inlet adjusting device, 11 housings

12 springs, 13 springs

14 valve pistons, 15 valves are adjusted button

20 suction ports

21 air-strainer, 22 closures

23 intake manifold, 24 breathing hoses

25 PCV devices, 30 pressure sensitive valves

31 housings, 32 springs

33 springs, 34 valve pistons

35 valve event speed are adjusted button 36 inlet holes

37 air outlet holes, 38 valve opening amplitudes are adjusted button

111 air outlet holes, 110 inlet holes

112 connect the pore 141 airtight slide parts of negative pressure

142 airtight seal ring 143 airtight seal rings

210 airducts, 220 Air flow meter

341 airtight slide parts 342 can with the position of enclosure interior driving fit

351 connect pore 352 spiro tooth parts of negative pressure

353 packing rings, 381 spiro tooth parts

382 inlet holes, 383 packing rings

1101 air-strainer, 3410 annular grooves

3411 airtight seal ring 3412 oil storages

3413 oilholes, 3421 conical surfaces

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferable enforcement cited below particularly is sharp, and cooperates appended graphicly, is described in detail below:

Please refer to engine air admittance regulation system embodiment shown in Figure 3, containing an air inlet regulating device 3 is connected with the breathing hose 24 of an engine 2, mix with the outer gas that enters from air-strainer 1101 in order to the gas leakage of telling in the breathing hose 24 that sucks engine 2, then mixed gas is sucked engine 2 and rekindles via intake manifold 23, suction port 20.

This air inlet regulating device 3 comprises a pressure sensitive valve 30 and valve event speed adjustment button 35.Be provided with one at pressure sensitive valve 30 and connect the center of the pore 351 of negative pressure by valve event speed adjustment button 3, the other end is provided with an inlet hole 36 and an air outlet hole 37.In this embodiment, the pore 351 of the connection negative pressure that pressure sensitive valve 30 is set communicates with the suction port 20 of engine via

intake manifold

23,37 of air outlet holes are joined with PCV device 25 and are communicated with the suction port 20 of engine via intake manifold 23, and the intake velocity that utilizes engine 2 change to produce pressure reduction and changes, and allows air inlet regulating device 3 pressure inside sensing valves 30 close thereupon or changes its unlatching amplitude.

Descent of piston when engine 2, ambient air is sucked suction port 20 from air-strainer 21 through closure 22, intake manifold 23 by piston, Air flow meter in the airduct 210 (AFM) 220 detecting air mass flows, electronic control unit is according to the oil mass of the detecting control oil nozzle of Air flow meter (AFM) 220; At this moment, pressure sensitive valve 30 is opened by the vacuum suction in the intake manifold, the air that makes air-strainer 1101 is with assembling from inlet hole 36, air outlet hole 37 and the gas leakage of telling that spues from PCV device 25 from the gas leakage of telling in the breathing hose 24, is inhaled into intake manifold 23 together, suction port 20 enters engine 2 burnings.At this moment, the space during owing to suction port 20 air inlets in crankcase is subjected to the compression of descent of piston, and acceleration makes the interior oil gas of case and tells gas leakage and outwards overflow from PCV device and breathing hose 24, follows above-mentioned path suction engine 2 and rekindles.

When the piston stroking upward of engine 2, the crankcase space moment increase of piston below and the negative pressure in the formation case, this negative pressure makes breathing hose 24 introduce air from air-strainer 1101 automatically and fills up this negative pressure of preventing rapidly.So, can not directly enter airduct 210, therefore no longer have and meet the cold airduct 210 that condenses in and form grunge pollution with intake manifold 23 the insides from spue waste gas, oil gas of breathing hose 24.

Please refer to Fig. 4, because some Europe are that car engine 4 is reserved with vent at its suction port 40 at present, therefore last embodiment's air inlet regulating device 3 air outlet holes 37 also can directly utilize this vent to communicate with suction port 40, and the pore 351 that connects negative pressure then can utilize three jaws to communicate with PCV device and intake manifold 23.Can form pressure reduction to the pressure sensitive valve 30 of air inlet regulating device 3 so equally, air can be entered from air-strainer 1101, waste gas that mixing spues from breathing hose 24 and oil gas are sent into engine 4 and are rekindled.

In addition, last embodiment also can be with reference to figure 5, and the pore 351 that changes into the connection negative pressure of air inlet regulating device 3 communicates with the suction port 40 of air outlet hole 37 and engine 4.Because the pore 351 that connects negative pressure and air outlet hole 37 calibers are one thick, one thin, be subjected to engine pistons descending when air-breathing, can form pressure reduction to the pressure sensitive valve 30 of air inlet regulating device 3 equally, make air enter air inlet regulating device 3, and send into engine 4 after waste gas that spues in the breathing hose 24 and oil gas mix and rekindle from air-strainer 1101.

Because the engine of general vehicle all is equipped with the PCV device and is connected with intake manifold, therefore reequip mode the most easily as shown in Figure 6, utilize tee union that breathing hose 24, the air filtering gas device 1101 of engine 2 are connected with the inlet hole 36 of air inlet regulating device 3, the pore 351, air outlet hole 37, the PCV device that utilize cross shaped joint will connect negative pressure are connected to intake manifold.In like manner, because the pore 351 that connects negative pressure and air outlet hole 37 calibers are one thick, one thin, be subjected to engine pistons descending when air-breathing, can form pressure reduction to the pressure sensitive valve 30 of air inlet regulating device 3 equally, make air enter air inlet regulating device 3, and send into engine 2 after waste gas that spues in the breathing hose 24 and oil gas mix and rekindle from air-strainer 1101.

As shown in Figure 7, the embodiment of the pressure sensitive valve 30 of aforesaid air inlet regulating device 3 also comprises a housing 31 for holding a pair of

spring

32 and 33, one valve piston 34.One end of housing 31 and valve event speed adjustment button 35 join, and other is provided with an inlet hole 36, and side is provided with an air outlet hole 37.Valve event speed is adjusted button 35 and is provided with a spiro tooth part 352 and locks an end of housing 31 for it, and utilizes its depth of locking to change the extendable room of the spring 32 that housing 31 held; When the extendable room of spring 32 is adjusted button 35 compressions by valve event speed, increase is made the strength (be that valve piston 34 Sliding velocitys can be accelerated because of spring 32 is compressed, increase speed) of valve acceleration unlatching to the pressure reduction reaction.And be pressure spring 32 stably, adjust button 35 ends in valve event speed and also can be provided with a packing ring 352 and make the stressed of spring 32 be tending towards average.

Adjust the center of button 35 in valve event speed and establish the pore 351 of a connection negative pressure.Refer again to Fig. 3 to shown in Figure 6, wherein air outlet hole 37 and the pore 351 that connects negative pressure are in order to be connected respectively to intake manifold 23 or/and engine air admittance mouth 20, utilize the speed of engine 2 air inlets to form pressure reduction to change the position of valve piston 34, thereby enable to move, change the open-width of pressure sensitive valve 30 with the position 342 (for example conical surface 3421 as shown) of enclosure interior driving fit.Be positioned on the axle center of housing because valve event speed is adjusted the pore 351 of the connection negative pressure of button 35, when attracted by engine air admittance, can avoid the problem of the action deflection of valve piston 34.

Please then consult shown in Figure 8.The valve piston 34 of present embodiment can be arranged in the housing 31 slidingly back and forth, forms the valve of ventilation between a control inlet hole 36 and the air outlet hole 37.Valve piston 34 1 ends are provided with an airtight slide part 341, the other end be provided with one can with the position 342 of housing 31 inner driving fits (for example illustrated conical surface 3421).Airtight slide part 341 surfaces of valve piston 34 be provided with one or a plurality of annular groove 3410 for its installing one or a plurality of airtight seal ring 3411, the inside of airtight slide part 341 be provided with an oil storage 3412 and one or a plurality of oilhole 3413 lead to the surface of airtight slide part 341, so as to providing lubricated and keeping airtight slip.Antifreeze and/or the resistant to elevated temperatures lubricant oil of can packing within oil storage 3412 makes the lubricated influence that can not be subjected to weather of valve piston 34.In addition, oil storage 3412 removes can pack into oil absorbent material or other can prevent the object that lubricant oil splashes or runs off, and can be used as the pedestal of fixing spring 32.

See also shown in Figure 9ly, last embodiment's housing 31 can change the valve opening amplitude of establishing in the end that inlet hole 36 originally is set and adjust button 38.The end that the valve opening amplitude is adjusted button 38 is provided with a spiro tooth part 381, and the inlet hole 36 that an inlet hole 382 replaces Fig. 5 is established in inside.The valve opening amplitude is adjusted button 38 can change the degree of depth of locking housing 31, so as to adjusting the extendable room of spring 33, the inlet hole 382 and the Throughput of air outlet hole 37 maximums is adjusted, with the demand of the engine regulating the qi flowing in the channels that adapts to different size.But the valve opening amplitude is adjusted end apical grafting one packing ring 383 of button 38, utilizes packing ring 383 indirect pushing tows to adjust the extendable room of spring 33.

Illustrate that as the arrow that illustrates among Fig. 9 when engine was accelerated, engine pistons quickened to suck air from its intake valve, will enlarge negative pressure in intake manifold.Because the pore 351 of the connection negative pressure of button 35 is adjusted greater than valve event speed in the aperture of the air outlet hole 37 of housing 31, therefore just form pressure difference at the two ends of the airtight slide part 341 of valve piston 34.This pressure difference promotes valve piston 34 downslides in conjunction with the strength of spring 32, cause and to open with the position 342 of housing 31 inner driving fits, the gettering quantity of engine is bigger, bigger with the unlatching at the position 342 of housing 31 inner driving fits, provide more substantial air to suck so as to quickening to engine, but make the fuel and the air that spray into engine be maintained at the oil-gas ratin of approaching perfect combustion, such as be 1: 15.

More than describing in detail is specifying of providing at preferred embodiment of the present invention, but this embodiment is not in order to limit claim of the present invention, allly do not break away from equivalence that skill spirit of the present invention done and implement or change, all should be contained in the claim of the present invention.

Claims

1. engine air admittance regulation system comprises that an engine air inlet adjusting device is connected with the inlet air pathway of an engine, is characterized in that this engine air inlet adjusting device contains:

One air outlet hole communicates with the suction port of this engine;

2. engine air admittance regulation system according to claim 1 is characterized in that, this inlet hole utilizes a tee union to connect the breathing hose of this air-strainer and this engine.

3. engine air admittance regulation system according to claim 1, it is characterized in that, this air outlet hole utilizes a tee union to connect the active type crankcase breather of this engine and the intake manifold of this engine simultaneously, communicates with this suction port via this intake manifold then; Perhaps, this air outlet hole directly communicates with this suction port.

4. engine air admittance regulation system according to claim 1 is characterized in that, the pore of this connection negative pressure communicates with this suction port via the intake manifold of this engine; Perhaps, the pore of this connection negative pressure utilizes a tee union to connect the active type crankcase breather of this engine and the intake manifold of this engine simultaneously, communicates with this suction port via this intake manifold then; Perhaps, the pore of this connection negative pressure utilizes a tee union to be connected with this air outlet hole and communicates with the suction port of this engine; Perhaps, the active type crankcase breather of the pore of this connection negative pressure, this air outlet hole and this engine utilizes a cross shaped joint to connect and communicates with suction port via the intake manifold of this engine.

5. according to any described engine air admittance regulation system in the claim 1～4, it is characterized in that this pressure sensitive valve comprises:

One housing;

One valve piston is placed within this housing slidably, contain an airtight slide part and one can with the position of this enclosure interior driving fit;

A pair of spring, but elastic telescopic be placed within this housing, and be arranged at the two ends of this valve piston respectively.

6. engine air admittance regulation system according to claim 5 is characterized in that, this inlet hole is located at an end of this housing, and this air outlet hole is located at a side of this housing.

7. engine air admittance regulation system according to claim 5 is characterized in that, this valve piston can be a conical surface with the position of this enclosure interior driving fit.

8. engine air admittance regulation system according to claim 5 is characterized in that, an end of this housing also connects a valve event speed and adjusts button, in order to adjust this to one of them extendable room of spring.

9. engine air admittance regulation system according to claim 5 is characterized in that, is provided with an oil storage within the airtight slide part of this valve piston.

10. engine air admittance regulation system according to claim 9 is characterized in that, the airtight slide part of this valve piston is provided with one makes this oil storage communicate with the surface of this airtight slide part with upper oil hole.

11. engine air admittance regulation system according to claim 9 is characterized in that, the airtight slide part of this valve piston is provided with more than one annular groove for sheathed more than one airtight seal ring.

12. engine air admittance regulation system according to claim 8 is characterized in that, the pore of the connection negative pressure of this engine air inlet adjusting device is located at the center that this valve event speed is adjusted button.

13. engine air admittance regulation system according to claim 8, it is characterized in that, this valve event speed is adjusted button and is also comprised a packing ring with this between the spring, utilizes this packing ring of end pushing tow of this valve event speed adjustment button, utilize again this packing ring pushing tow this to spring one of them.

14. engine air admittance regulation system according to claim 8 is characterized in that, this housing is adjusted the opposite end of button and is also connected a valve opening amplitude and adjust button in connecting this valve event speed, in order to adjust this to one of them extendable room of spring.

15. engine air admittance regulation system according to claim 14 is characterized in that, the inlet hole of this engine air inlet adjusting device is located at the shaft core position that this valve opening amplitude is adjusted button.

16. engine air admittance regulation system according to claim 14, it is characterized in that, comprise that also a packing ring is located at this valve opening amplitude and adjusts the button end, and utilize this valve opening amplitude to adjust this packing ring of end pushing tow of button, utilize again this packing ring pushing tow this to spring another person wherein.