CN101520015B - Engine air inlet adjusting system and device therefor - Google Patents
Engine air inlet adjusting system and device therefor Download PDFInfo
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- CN101520015B CN101520015B CN2008100822157A CN200810082215A CN101520015B CN 101520015 B CN101520015 B CN 101520015B CN 2008100822157 A CN2008100822157 A CN 2008100822157A CN 200810082215 A CN200810082215 A CN 200810082215A CN 101520015 B CN101520015 B CN 101520015B
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Abstract
The invention discloses an engine air inlet adjusting system and a device therefor, and the engine air inlet adjusting system comprises the engine air inlet adjusting device which is connected with anengine air inlet manifold and can introduce external air into the engine air inlet manifold through an auxiliary air filter by utilizing the suction force surge during engine speedup, thus accelerati ng the surged air requirement supplement in the moment of engine speedup. The engine air inlet adjusting device comprises a shell, a membrane, an adjusting component of a valve element and the auxiliary air filter; wherein the membrane separates the shell into a first space and a second space. A rough aspirating hole and an air inlet are arranged inside the first space of the shell, and a fine aspirating hole is arranged inside the second space. When air inlet suction force surges during engine speedup, pressure difference can be formed between the upper and the lower spaces of the membrane soas to drive the valve element that is connected with the membrane to open a channel between the rough aspirating hole and the air inlet, thus leading external air to be absorbed into an engine combus tion chamber through the auxiliary air filter, the adjusting component and the air inlet manifold for combustion assistance.
Description
Technical field
The present invention is relevant for a kind of engine air admittance regulation system and device; And particularly get into the engine air admittance menifold via auxiliary air filter relevant for a kind of air that can when engine quickens, let, make oil/gas than thereby can be near the engine air admittance regulation system and the device of ideal value.
Background technique
As shown in Figure 1, traditional engine air admittance path comprises from an air-strainer 6 introduces air, via airduct 7, engine air admittance menifold 3, mixes the back with fuel oil and is sucked engine combustion chamber 4 by piston.Flowmeter (AFM) 8 produces signal in order to the gas flow rate of detecting in this airduct; The SC sigmal control fuel injection quantity that 9 of fuel control systems can give according to flowmeter 8; Make and when idling, can keep most economical oil/gas proportions of ingredients at least, for example make it to be maintained at oil/gas proportions of ingredients of 1: 15.The engine crankcase 5 of some 4 below, engine combustion chamber is introduced intake manifold 3 with a PCV valve 51 with waste gas, leads to airduct 7 and atmosphere with a breathing hose (breatherhose) 52, with this on-stream pressure balance of keeping in the case.
Because some leaks into engine crankcase 5 [this kind gas contains harmful gas such as hydrocarbon (HC) and carbon monoxide (CO)] through piston to the waste gas of engine combustion chamber 4 unavoidably; In order directly not entered in the atmosphere; Suction in the time of must utilizing engine air admittance is introduced engine air admittance manifold 3 with the waste gas of these leakages, sucks engine combustion chamber 4 once again and goes burning.Past various countries' rule engine must be installed PCV (the Positive Crankcase Ventilation Valve) valve 51 of pump circulation ventilation; Make these hydrocarbon (CH) that are harmful to health and carbon monoxide compounds such as (CO) by burning once again, to avoid causing after the directly discharging pollution of air.
In the running of reality, the aforementioned conventional engine also has disadvantage, suddenly waits to improve:
1. because breathing hose 52 communicates with airduct 7, can down compress the air in the crankcase 5 when engine pistons is descending, make the compelled airduct 7 that enters of machine oil steam in the case, condense on the tube wall when meeting cool air, airduct 7 caused the grunge pollution that to remove.
2. the air inlet of engine and oil spout design, and can only when idling, reach the oil/gas proportions of ingredients of 1: 15 less expensive at most.And quickening suddenly, driving the moment of stepping on the gas suddenly, and existing gas handling system can't be replenished the air of capacity at once, and at this moment oil/gas proportions of ingredients produces and consumes oil and atmospheric pollution with overrich and can't perfect combustion.
Summary of the invention
The problem that air can't be supplied at once when quickening for solving aforementioned engine; The present invention provides a kind of engine air admittance regulation system and device; Suction when engine capable of using quickens increases suddenly; Make ambient air get into the engine air admittance menifold, the air requirements that moment increases suddenly when quickening to supply the engine acceleration with this from an auxiliary air filter.
A kind of engine air admittance regulation system provided by the invention comprises:
One engine contains an air inlet path, an engine combustion chamber and an engine crankcase; This air inlet path comprises an air-strainer, an airduct and an engine air admittance menifold at least, makes an ambient air be inhaled into this engine combustion chamber via this air-strainer, this airduct and the entering of this engine air admittance menifold;
One engine air inlet adjusting device, this engine air inlet adjusting device comprises:
One auxiliary air filter;
One adjusting part; Be connected between this auxiliary air filter and this engine air admittance menifold; Adjusting part inside is provided with a film, a valve element and a gas passageway; Can when this engine quicken, promote this valve element and open this gas passageway with film, let ambient air be able to by from this auxiliary air filter, this adjusting part, that this engine air admittance menifold sucks this engine combustion chamber is combustion-supporting;
This divided thin film of the inner utilization of this adjusting part is divided into:
One first space is provided with a thick bleeder hole and a suction port and forms this gas passageway; And
One second space is provided with a thin bleeder hole; This thin bleeder hole all communicates with this engine air admittance menifold with this thick bleeder hole; Utilize the difference of Ventilation Rate between this thick bleeder hole and the thin bleeder hole; When this engine quickens, open this gas passageway with the second space build-up of pressure difference, and this gas passageway is closed when this first space and the second space pressure reduction disappearance in this first space.
Another engine air admittance regulation system provided by the invention comprises:
One engine contains an air inlet path, an engine combustion chamber and an engine crankcase; This air inlet path comprises an air-strainer, an airduct and an engine air admittance menifold at least, makes an ambient air be inhaled into this engine combustion chamber via this air-strainer, this airduct and the entering of this engine air admittance menifold;
One engine air inlet adjusting device, this engine air inlet adjusting device comprises:
One auxiliary air filter;
One adjusting part; Be provided with a thin bleeder hole and a thick bleeder hole communicates with this engine air admittance menifold; The Ventilation Rate that utilizes this thin bleeder hole is less than this thick bleeder hole; When this engine air admittance suction is uprushed, this adjusting part is caused a pressure difference and opens, let ambient air be able to by from this auxiliary air filter, this adjusting part, that this engine air admittance menifold sucks this engine combustion chamber is combustion-supporting; And keep when steady in this engine air admittance suction, this pressure difference disappears and this adjusting part is closed, and it is combustion-supporting to make ambient air no longer sucked this engine combustion chamber from this auxiliary air filter.In this scheme, adjusting part can be any air valve that utilizes engine air admittance suction to change and open and close.
Preferably, the present invention provides a regulation of the engine air intake device, comprising an auxiliary air filter and an adjustment assembly; wherein the adjustment assembly includes a housing, including a first space and a second space, and There is a space between the first inlet, a gate and a rough vacuum holes, and provides an air passage; the inlet air filter with the auxiliary phase, while in the second space are located a small pumping stomata; a film disposed on the first space and the second space between and separating the two; a valve element connected with the film, you can open and close contact with the gate cut off the gas passage; and a first spring , located within the space between the first and to the valve element with Jie, for securing the valve member close contact with the gate; the valve member to the first space and the second space having a pressure differential to open, and to the pressure difference disappears truncate the gas passage.Thick bleeder hole leads to the engine air admittance menifold respectively with thin bleeder hole; The suction of air inlet increases suddenly when engine quickens; Can be in the upper and lower formation pressure difference of diaphragm and the valve element that driven diaphragm connected is opened the passage between thick bleeder hole and the suction port, let ambient air be able to be inhaled into the engine combustion chamber and help burning from auxiliary air filter, adjusting part, inlet manifold.
According to such scheme, effect of the present invention is significant, has following beneficial technical effects:
1. during idling, the spring of adjusting part makes valve element be able to close the gas passageway, therefore can not influence the preset optimum oil/gas proportions of ingredients of engine; And when engine is quickening, open the gas passageway automatically in the upper and lower generation pressure difference of diaphragm at once, air is sucked and is quickened from auxiliary air filter to be supplied, and reduces the concentration that oil/gas mixes, and makes burning more complete.
2. lower from auxiliary air filter inhaled air temperature, can reduce engine temperature, reduce the discharge amount of toxic gas NOx.
3. with between breathing hose reconfiguration to adjusting part and the auxiliary air filter; Not only can avoid the machine oil steam in the engine crankcase in airduct, to amass into grease; When engine quickens again can with waste gas and this machine oil steam with mix from auxiliary air filter inhaled air gas; Be inhaled into the engine combustion chamber together and burn once again, reduce the discharging of toxic gas.
Description of drawings
Fig. 1 is an existing engine intake schematic representation.
Fig. 2 is an embodiment's schematic representation according to engine air admittance regulation system of the present invention.
Fig. 3 is an embodiment's schematic representation according to engine air inlet adjusting device of the present invention.
Fig. 4 is the action schematic representation of the engine air inlet adjusting device of Fig. 3.
Fig. 5 is the alternate embodiment schematic representation of the engine air inlet adjusting device of a Fig. 3.
Fig. 6 is the alternate embodiment schematic representation of the engine air inlet adjusting device of a Fig. 5.
Fig. 7 is the alternate embodiment schematic representation of the engine air inlet adjusting device of a Fig. 3.
Fig. 8 be a Fig. 6 with the engine air inlet adjusting device of Fig. 7 combine the alternate embodiment schematic representation.
The primary component symbol description
1 controlling device, 2 auxiliary air filter
3 engine air admittance menifolds engine combustion chambers 4
5 engine crankcase, 6 air-strainer
7 airducts, 8 flowmeters
9 fuel control systems, 10 housings
11 diaphragms, 12 valve elements
15 second spaces, 14 first spaces
16 thick bleeder hole 17 suction ports
18 thin bleeder hole 131 first springs
132 second springs, 140 sluice gates
170 first adjustment buttons, 171 suction ports
180 second adjustment buttons, 181 thin bleeder holes
190 the 3rd adjustment buttons, 191 thin bleeder holes
1901 shanks, 1902 screw threads
Embodiment
For let above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts preferable enforcements profit, and cooperates appended graphicly, elaborates as follows:
As shown in Figure 2, according to engine air admittance regulation system of the present invention, include an engine air inlet adjusting device 1 and be connected with the air inlet path of an engine.Wherein, this engine air inlet adjusting device 1 comprises an adjusting part and an auxiliary air filter 2, and the structure in the middle of the air inlet path of engine and the existing technology is identical, no longer repeats; Adjusting part is connected between auxiliary air filter 2 and the engine air admittance menifold 3.Adjusting part is provided with a gas passageway; Close when being failure to actuate; Suction when utilizing engine to quicken during action increases suddenly to be opened, and makes ambient air get into engine air admittance menifold 3 through the gas passageway in the adjusting part from auxiliary air filter 2, replenishes engine and quickens the air that moment increases suddenly.
The preferably, can breathing hose 52 reconfigurations to adjusting part and auxiliary air filter 2 with engine between, when engine pistons was up, air can be mended engine crankcase 5 from auxiliary air filter 2 and keep pressure balance.When engine quickens, waste gas in the engine crankcase 5 and machine oil steam will be inhaled into 4 burnings of engine combustion chamber via adjusting part, engine air admittance menifold 3.So not only can solve the problem that the machine oil steam pollutes airduct 7, can avoid waste gas directly to enter atmosphere and pollute through burning once again again simultaneously.
As shown in Figure 3, comprise an adjusting part and an auxiliary air filter 2 according to engine air inlet adjusting device 1 of the present invention, wherein this adjusting part comprises a housing 10, a diaphragm 11, a valve element 12 and one first spring 131; Wherein diaphragm 11 is divided into one first space 14 and one second space 15 with housing 10.First space 14 in housing 10 is provided with a thick bleeder hole 16 and a suction port 17, and sets out a thin bleeder hole 18 in second space 15.
Meaning as shown in Figure 4, valve element 12 links to each other with diaphragm 11 in first space 14.When engine quickens; The suction that engine air admittance menifold 3 increases suddenly makes diaphragm 11 produce compression first spring, 131 strength and moves toward first space 14; Promote valve element 12 with this and open aforementioned gas passageway; Letting ambient air be able to gas passageway and engine air admittance menifold 3, a tunnel in auxiliary air filter 2, the adjusting part is inhaled into engine combustion chamber 4 and helps burning.
The implementer can be made adjusting part shown in Figure 3 into alternate embodiment as shown in Figure 5.This embodiment increases by one second spring 132 and one second adjustment button 180 in 15 the insides, second space, and forms a thin bleeder hole 181 at the second adjustment button 180.The second adjustment button 180 is compressible or loosen second spring 132; To move the equilibrium position of first spring 131, second spring 132; The tightness of connecting airtight between adjustment valve element 12 and the sluice gate 140 is to guarantee that diaphragm 11 can promote valve element 12 and open sluice gate 140 when engine quickens.
The implementer also can be made adjusting part shown in Figure 5 into alternate embodiment as shown in Figure 6.This embodiment increases by one first adjustment button 170 in 14 the insides, first space, and at the first adjustment button 170 suction port 170 is provided.This embodiment can adjust the relative position of the first adjustment button 170 and the second adjustment button 180; Change the tightness of connecting airtight between its equilibrium position and adjustment valve element 12 and the sluice gate 140, to guarantee that diaphragm 11 can promote valve element 12 and open sluice gate 140 when engine quickens.
The implementer can be made adjusting part shown in Figure 3 into alternate embodiment as shown in Figure 7 again.This embodiment increases by one the 3rd adjustment button 190 in 15 the insides, second space, comprise that a shank 1901 laterally gets into the thin bleeder hole 191 in second space 15 with end.Shank 1901 through the 3rd adjustment button 190 is provided with screw thread 1902; Utilize screw thread 1902 to regulate the ventilated sectional area of thin bleeder hole 191; Can be when engine quickens in order to increase or to reduce the strength that diaphragm 11 moves towards first space 14; Make the strength of opening promotion valve element 12 unlatching sluice gates 140 transfer to suitable size, to adapt to the operation of different engines.
In addition; Haveing the knack of this art can change according to adjusting part shown in Figure 6; For example shown in Figure 8; Side at the second adjustment button 180 is provided with one the 3rd adjustment button 190, and the end through shank 1901 laterally gets in the thin bleeder hole 181 in second space 15 and changes its sectional areas of can ventilating, to adjust the Ventilation Rate of thin bleeder hole 181.
Engine air admittance regulation system provided by the present invention and device when comparing with other existing technology, have advantage at least:
1. during idling, the spring of adjusting part makes valve element be able to close the gas passageway, therefore can not influence the preset optimum oil/gas proportions of ingredients of engine; And when engine is quickening, open the gas passageway automatically in the upper and lower generation pressure difference of diaphragm 11 at once, air is sucked and is quickened to be supplied from auxiliary air filter 2, reduces the concentration that oil/gas mixes, and makes burning more complete.
2. lower from auxiliary air filter 2 inhaled air temperature, can reduce engine temperature, reduce the discharge amount of toxic gas NOx.
3. with between breathing hose 52 reconfigurations to adjusting part and the auxiliary air filter 2; Not only can avoid the machine oil steam of 5 li of engine crankcase to amass into grease for 7 li at airduct; When engine quickens again can with waste gas and this machine oil steam with mix from auxiliary air filter 2 inhaled air gas; Be inhaled into engine combustion chamber 5 together and burn once again, reduce the discharging of toxic gas.
Above-described adjusting part can be any air valve that utilizes engine air admittance suction to change and open and close.More than specifying, only is to preferred embodiment of the present invention, but this embodiment is not in order to limiting claim of the present invention, does not allly break away from equivalence that skill spirit of the present invention does and implements or change, and all should be contained in the claim of the present invention.
Claims (16)
1. engine air admittance regulation system comprises:
One engine contains an air inlet path, an engine combustion chamber and an engine crankcase; This air inlet path comprises an air-strainer, an airduct and an engine air admittance menifold at least, makes an ambient air be inhaled into this engine combustion chamber via this air-strainer, this airduct and the entering of this engine air admittance menifold;
One engine air inlet adjusting device, this engine air inlet adjusting device comprises:
One auxiliary air filter;
One adjusting part; Be connected between this auxiliary air filter and this engine air admittance menifold; Adjusting part inside is provided with a film, a valve element and a gas passageway; Can when this engine quicken, promote this valve element and open this gas passageway with film, let ambient air be able to by from this auxiliary air filter, this adjusting part, that this engine air admittance menifold sucks this engine combustion chamber is combustion-supporting;
It is characterized in that this divided thin film of the inner utilization of this adjusting part is divided into:
One first space is provided with a thick bleeder hole and a suction port and forms this gas passageway; And
One second space is provided with a thin bleeder hole; This thin bleeder hole all communicates with this engine air admittance menifold with this thick bleeder hole, utilizes the difference of Ventilation Rate between this thick bleeder hole and the thin bleeder hole, when this engine quickens, opens this gas passageway in this first space and the second space build-up of pressure difference,
And this gas passageway is closed when this first space and the second space pressure reduction disappear.
2. engine air admittance regulation system as claimed in claim 1 is characterized in that, this engine crankcase communicates with this auxiliary air filter and this adjusting part through a breathing hose.
3. engine air admittance regulation system as claimed in claim 1; It is characterized in that; Air-entry suction when this adjusting part utilizes this engine to quicken sees through this thick bleeder hole and bleeds with this thin bleeder hole; Poor in this first space and the second space build-up of pressure, thus drive this film and promote this valve element and open this gas passageway.
4. engine air admittance regulation system as claimed in claim 1 is characterized in that, this engine crankcase is provided with a PCV valve and is connected with this engine air admittance menifold.
5. engine air admittance regulation system as claimed in claim 1 is characterized in that, this engine comprises that also a flow takes into account a fuel control system; Wherein the gas flow rate in this this airduct of flowmeter detecting produces a signal, and this fuel control system is according to this SC sigmal control oil spout.
6. engine air admittance regulation system comprises:
One engine contains an air inlet path, an engine combustion chamber and an engine crankcase; This air inlet path comprises an air-strainer, an airduct and an engine air admittance menifold at least, makes an ambient air be inhaled into this engine combustion chamber via this air-strainer, this airduct and the entering of this engine air admittance menifold;
One engine air inlet adjusting device, this engine air inlet adjusting device comprises:
One auxiliary air filter;
One adjusting part; It is characterized in that; Be provided with a thin bleeder hole and a thick bleeder hole communicates with this engine air admittance menifold; The Ventilation Rate that utilizes this thin bleeder hole is less than this thick bleeder hole, when this engine air admittance suction is uprushed, this adjusting part caused a pressure difference and opens, let ambient air be able to by from this auxiliary air filter, this adjusting part, that this engine air admittance menifold sucks this engine combustion chamber is combustion-supporting; And keep when steady in this engine air admittance suction, this pressure difference disappears and this adjusting part is closed, and it is combustion-supporting to make ambient air no longer sucked this engine combustion chamber from this auxiliary air filter.
7. engine air admittance regulation system as claimed in claim 6 is characterized in that, this engine crankcase communicates with this auxiliary air filter and this adjusting part through a breathing hose.
8. engine air admittance regulation system as claimed in claim 6 is characterized in that, the air-entry suction when this adjusting part utilizes this engine to quicken drives an air valve to open the gas passageway of this adjusting part.
9. engine air admittance regulation system as claimed in claim 6 is characterized in that, this engine crankcase is provided with a PCV valve and is connected with this engine air admittance menifold.
10. engine air admittance regulation system as claimed in claim 6 is characterized in that, this engine comprises that also a flow takes into account a fuel control system; Wherein the gas flow rate in this this airduct of flowmeter detecting produces a signal, and this fuel control system is according to this SC sigmal control oil spout.
11. an engine air inlet adjusting device comprises:
One auxiliary air filter;
One adjusting part, this adjusting part comprises:
One housing includes one first space and one second space, and be provided with a suction port in this first space, a sluice gate and a thick bleeder hole, and a gas passageway is provided; This suction port and this auxiliary air filter are joined, and then establish a thin bleeder hole in this second space;
One film is located between this first space and this second space and is separated both;
One valve element is connected with this film, can connect airtight with this sluice gate with opening and blocks this gas passageway; And
A first spring located within the space between the first and the valve member relative to the Jie, for securing the valve member close contact with the gate;
It is characterized in that this valve element is opened when there is a pressure difference in this first space and second space, and when this pressure difference disappears, blocks this gas passageway.
12. engine air inlet adjusting device as claimed in claim 11 is characterized in that, this thick bleeder hole communicates with an engine air admittance menifold respectively with this thin bleeder hole.
13. engine air inlet adjusting device as claimed in claim 11 is characterized in that, this second space also connects the ventilated sectional area of one the 3rd this thin vent of adjustment button confession the change to change its Ventilation Rate, so that this pressure difference is able to change size.
14. engine air inlet adjusting device as claimed in claim 11 is characterized in that, one second spring and one second adjustment button are also contained in this second space, and this second spring is connected between this film and this second adjustment button.
15. engine air inlet adjusting device as claimed in claim 14 is characterized in that, one first adjustment button is also contained in this first space, and this first spring is connected between this valve element and this first adjustment button.
16. engine air inlet adjusting device as claimed in claim 14 is characterized in that, this second adjustment button also connects the ventilated sectional area of one the 3rd this thin vent of adjustment button confession the change to change its Ventilation Rate, so that this pressure difference is able to change size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100822157A CN101520015B (en) | 2008-02-26 | 2008-02-26 | Engine air inlet adjusting system and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100822157A CN101520015B (en) | 2008-02-26 | 2008-02-26 | Engine air inlet adjusting system and device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101520015A CN101520015A (en) | 2009-09-02 |
| CN101520015B true CN101520015B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100822157A Expired - Fee Related CN101520015B (en) | 2008-02-26 | 2008-02-26 | Engine air inlet adjusting system and device therefor |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088101A (en) * | 1975-12-27 | 1978-05-09 | Toyota Jidosha Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus |
| US4100900A (en) * | 1976-06-01 | 1978-07-18 | Wilhelm Straub | Method and apparatus for controlling the air of combustion of carburetor engines |
| US4187821A (en) * | 1977-02-03 | 1980-02-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine with a bypass line skirting the load-control organ of the internal combustion engine |
| US4210113A (en) * | 1979-02-23 | 1980-07-01 | Sumari Engineering, Inc. | Vacuum valve for introduction of controlled amounts of air into engine systems |
| US4289100A (en) * | 1978-01-20 | 1981-09-15 | Nippondenso Co., Ltd. | Apparatus for controlling rotation speed of engine |
| US4353338A (en) * | 1979-11-13 | 1982-10-12 | Colt Industries Operating Corp. | Engine idle air valve means and system |
| US4414924A (en) * | 1981-06-22 | 1983-11-15 | Harren Hugh H | Air jet unit |
| CN201003442Y (en) * | 2007-01-12 | 2008-01-09 | 三阳工业股份有限公司 | Negative pressure regulated air inlet structure of pedal locomotive engine |
-
2008
- 2008-02-26 CN CN2008100822157A patent/CN101520015B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088101A (en) * | 1975-12-27 | 1978-05-09 | Toyota Jidosha Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus |
| US4100900A (en) * | 1976-06-01 | 1978-07-18 | Wilhelm Straub | Method and apparatus for controlling the air of combustion of carburetor engines |
| US4187821A (en) * | 1977-02-03 | 1980-02-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine with a bypass line skirting the load-control organ of the internal combustion engine |
| US4289100A (en) * | 1978-01-20 | 1981-09-15 | Nippondenso Co., Ltd. | Apparatus for controlling rotation speed of engine |
| US4210113A (en) * | 1979-02-23 | 1980-07-01 | Sumari Engineering, Inc. | Vacuum valve for introduction of controlled amounts of air into engine systems |
| US4353338A (en) * | 1979-11-13 | 1982-10-12 | Colt Industries Operating Corp. | Engine idle air valve means and system |
| US4414924A (en) * | 1981-06-22 | 1983-11-15 | Harren Hugh H | Air jet unit |
| CN201003442Y (en) * | 2007-01-12 | 2008-01-09 | 三阳工业股份有限公司 | Negative pressure regulated air inlet structure of pedal locomotive engine |
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|---|---|
| CN101520015A (en) | 2009-09-02 |
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