CN100458115C - Variable inlet duct and inlet system containing same - Google Patents
Variable inlet duct and inlet system containing same Download PDFInfo
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- CN100458115C CN100458115C CNB200510135255XA CN200510135255A CN100458115C CN 100458115 C CN100458115 C CN 100458115C CN B200510135255X A CNB200510135255X A CN B200510135255XA CN 200510135255 A CN200510135255 A CN 200510135255A CN 100458115 C CN100458115 C CN 100458115C
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- 238000002485 combustion reaction Methods 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides a variable inlet pipe and the inlet system containing the variable inlet manifold. The inlet manifold comprises distributing pipe, control valve and resonator. Said distributing pipe comprises a first distributing pipe, a second distributing pipe and a third distributing pipe and three distributing pipes are connected with each other in parallel. Said control valve comprises a first control valve and a second control valve. Three distributing pipes connected in parallel and two control valves are adopted in the invention. By status switch of two control valves three different air-flowing paths are constituted so that air inlet channels under different rotating speed condition are distinguished and torque, power, volume efficiency and air inlet of engine can achieve better effect under the condition with high, middle and low speed zones.
Description
Technical field
The present invention relates to a kind of variable inlet duct and gas handling system.
Background technique
The air inlet length of conventional engines suction tude is constant, can only guarantee that motor has good performance under a certain operating mode, and can't regulate in running, makes motor decreased performance under two kinds of extreme operating modes.Intake manifold length variable technique (VGIS) is a kind of effective way of improving engine performance and reducing noxious emission.
The intake manifold length variable technique is to utilize the pressure wave of charge air flow inertia generation to improve charging efficiency.When gas high speed flow during to intake valve, if intake valve is closed suddenly, air-flow stops suddenly near the intake valve, and gas in the suction tude is because effect of inertia continues to flow, and near the gas the intake valve is compressed, and pressure rises.After effect of inertia, compressed gas begins to expand, and flows to the charge air flow opposite direction, and pressure descends.Be reflected again when the air-flow of expanding gas passes to suction tude, form pressure wave.If this pressure pulse wave and intake valve open and close and work good, make that the air in the suction tude forms resonance, focus on by the intake valve that will open when pressure wave, when opening, intake valve will form the super charge effect.
Generally speaking, when intake manifold length was long, the resonant pressure wave-wave was grown up, and can make low speed torque increase in the motor; Intake manifold length in short-term, resonant pressure wave-wave length can make high engine speeds district power increase.If intake manifold length can change, then can take into account increase power and increase moment of torsion.
The VGIS system can be divided into the two large divisions, and the one, suction tude also has the valve of controlling intake manifold length in suction tude inside; The 2nd, control system is program and the system's power unit that is solidificated in the electronic control unit (ECU).Adopt the VGIS system, thereby ECU can adjust the length that valve changes suction tude according to the variation of engine speed and load.Existing suction tude is the secondary variable inlet duct, and as depicted in figs. 1 and 2, this suction tude has the gas-distributing pipe of two parallel connections, is respectively one-level gas-distributing pipe 1 and secondary gas-distributing pipe 2.As shown in Figure 1, when running at high speed, valve 3 is opened, the air-flow secondary gas-distributing pipe 2 of only flowing through, and suction tude shortens, and reduces the air inlet flow losses, improves two-forty power; As shown in Figure 2, when low speed driving, valve 3 is closed, airflow passes one-level gas-distributing pipe 1 and secondary gas-distributing pipe 2, suction tude is elongated, and the kinetic energy that inner air tube flows increases, and causes induction air flow ratio to be accelerated, charging efficiency improves, and can obtain bigger output power under same combustion condition, increases moment of torsion.Improved the power character of motor thus, very effective to low speed torque and the high speed output power that improves motor.
Existing this suction tude is only better in effect at a high speed and during low speed, and Fig. 3 is for adopting engine volume coefficiency and the rotation speed relation figure that has suction tude now.As can be seen from Figure 3, in the low engine speed district, utilize resonance pressure charging, volumetric efficiency is pressed curve 4 and is changed; In the high engine speeds district, utilize inertia, volumetric efficiency is pressed curve 5 and is changed.But, can find equally that by Fig. 3 trough 6 has appearred in (3000 rev/mins-4000 rev/mins) curve in the middling speed district.So existing secondary variable inlet duct and gas handling system thereof are under the operating mode of driving at moderate speed, volumetric efficiency is not high, and the air inlet effect is bad.
Summary of the invention
The present invention is directed to that existing secondary variable inlet duct and gas handling system thereof exist under the operating mode of driving at moderate speed, the shortcoming that volumetric efficiency is not high, the air inlet effect is bad provides a kind of variable inlet duct and gas handling system thereof that makes motor can both reach better effects in moment of torsion, power, volumetric efficiency, the air inlet in high, normal, basic rotating speed district.
Variable inlet duct provided by the invention comprises gas-distributing pipe, control valve resonant cavity; Wherein, described gas-distributing pipe comprises one-level gas-distributing pipe, secondary gas-distributing pipe and three grades of gas-distributing pipes, and one-level gas-distributing pipe, secondary gas-distributing pipe and three grades of gas-distributing pipes are parallel with one another; Described resonant cavity has the outlet of suction port, three grades of gas-distributing pipes of connection and is communicated with the outlet of one-level gas-distributing pipe, secondary gas-distributing pipe; Described control valve comprises first control valve and second control valve, first control valve control be communicated with resonant cavity and three grades of gas-distributing pipes outlet, is communicated with the switching of the outlet of resonant cavity and one-level gas-distributing pipe, secondary gas-distributing pipe, second control valve control connection resonant cavity and secondary gas-distributing pipe outlet, be communicated with the switching of the outlet of secondary gas-distributing pipe and one-level gas-distributing pipe.
The present invention also provides a kind of gas handling system, comprise variable inlet duct, speed probe, electronic control unit (hereinafter to be referred as ECU), described ECU comprises signal receiving module, data processing module, control output module, described signal receiving module is electrically connected with speed probe, and described control output module is connected with the control valve of variable inlet duct; Wherein, described variable inlet duct is a variable inlet duct provided by the present invention, the data processing module of described ECU is judged current rotating speed according to the signal from speed probe that data reception module receives, and described control output module is controlled the state of first control valve and second control valve according to current rotating speed.
Variable inlet duct provided by the present invention has adopted the form of three grades of gas-distributing pipe parallel connections and two control valves, state switching by two control valves has constituted three different airflow passes approach, thereby distinguished the intake duct under the different rotating speeds operating mode, made motor moment of torsion, power, volumetric efficiency and air inlet under the operating mode in high, normal, basic rotating speed district all reach effect preferably.Adopt air inlet system for variable air inlet pipe provided by the invention, rotating speed can be divided into high velocity, middling speed district and low velocity zone, thereby thereby can reach the variable air inlet length of tube according to the state that different rotating speed operating modes is controlled control valve, reached and controlled effect preferably.
Description of drawings
Fig. 1 is the air inlet schematic representation of existing variable inlet duct under running at high speed;
Fig. 2 is the air inlet schematic representation of existing variable inlet duct under low speed driving;
Fig. 3 is engine volume coefficiency and the rotation speed relation figure that adopts existing variable inlet duct;
Fig. 4 is the air inlet schematic representation of variable inlet duct provided by the invention under low speed driving;
Fig. 5 is the air inlet schematic representation of variable inlet duct provided by the invention under driving at moderate speed;
Fig. 6 is the air inlet schematic representation of variable inlet duct provided by the invention under running at high speed;
Fig. 7 is the assembly schematic representation of gas handling system provided by the invention;
Fig. 8 is engine volume coefficiency and the rotation speed relation figure that adopts variable inlet duct provided by the invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
In conjunction with Fig. 4 to Fig. 6 as seen, variable inlet duct provided by the invention comprises gas-distributing pipe, control valve resonant cavity 10; Wherein, described gas-distributing pipe comprises one-level gas-distributing pipe 7, secondary gas-distributing pipe 8 and three grades of gas-distributing pipes 9, and one-level gas-distributing pipe 7, secondary gas-distributing pipe 8 and three grades of gas-distributing pipes 9 are parallel with one another; Described resonant cavity 10 has the outlet of suction port 13, three grades of gas-distributing pipes 9 of connection and is communicated with the outlet of one-level gas-distributing pipe 7, secondary gas-distributing pipe 8; Described control valve comprises first control valve 11 and second control valve 12, the control of first control valve 11 be communicated with resonant cavitys 10 and three grades of gas-distributing pipes 9 outlet, is communicated with the switching of resonant cavity 10 and the outlet of one-level gas-distributing pipe 7, secondary gas-distributing pipe 8, second control valve 12 control connection resonant cavitys 10 and secondary gas-distributing pipe 8 outlet, be communicated with the switching of the outlet of secondary gas-distributing pipe 8 and one-level gas-distributing pipe 7.
Described resonant cavity 10 is between three grades of gas-distributing pipes 9 and secondary gas-distributing pipe 8.The inlet hole 13 of described resonant cavity 10 is connected with the air-strainer outlet.
Under the preferable case, the caliber and the pipe range of described each gas-distributing pipe are different, the caliber of the caliber＜three grade gas-distributing pipe 9 of the caliber of one-level gas-distributing pipe 7＜secondary gas-distributing pipe 8, the pipe range of one-level gas-distributing pipe 7〉pipe range of secondary gas-distributing pipe 8〉pipe range of three grades of gas-distributing pipes 9.Wherein, the caliber of one-level gas-distributing pipe 7: the caliber of secondary gas-distributing pipe 8: the caliber of three grades of gas-distributing pipes 9 is preferably 1: 1.4～and 1.6: 1.8～2, the pipe range of one-level gas-distributing pipe 7: the pipe range of secondary gas-distributing pipe 8: the pipe range of three grades of gas-distributing pipes 9 is preferably 5～8: 3～5: 1.Concrete caliber and pipe range those of ordinary skills are coupling as the case may be and specifically.
Described first control valve 11 and second control valve 12 are preferably solenoid electric valve, are electrically connected with the control output module of ECU.Described solenoid electric valve also comprises valve positioner, and the structure of solenoid electric valve and valve positioner is that those skilled in the art are known.
Described first control valve 11 and second control valve 12 are the one chip valve, rotate state with an end of monolithic as rotating center respectively with the switching controls valve, the rotating center of described first control valve 11 is positioned on the tube wall of resonant cavity 10, and the rotating center of described second control valve 12 is positioned on the tube wall of secondary gas-distributing pipe 8.
As shown in Figure 7, the present invention also provides a kind of gas handling system, comprise variable inlet duct, speed probe 18, ECU 14, described ECU 14 comprises signal receiving module 15, data processing module 16, control output module 17, described signal receiving module 15 is electrically connected with speed probe 18, and described control output module 17 is electrically connected with the control valve of variable inlet duct; Wherein, described variable inlet duct is a variable inlet duct provided by the present invention, the data processing module 16 of described ECU 14 is judged current rotating speed according to the signal from speed probe 18 that data reception module 15 receives, and described control output module 17 is controlled the state of first control valve 11 and second control valve 12 according to current rotating speed.
Wherein, the mounting point of described speed probe 18 is that those skilled in the art are known, is positioned on the timing cover of motor, and the signal plate of speed probe 18 is installed on the bent axle, the rotating speed of the rotation sensing motor by the induced signal plate.Described speed probe 18 is preferably induction speed probe.
Described signal receiving module 15 comprises the A/D change-over circuit, the rotating speed analog signal conversion digital signal that received speed probe 18 is sent.The structure of described A/D change-over circuit and to be connected to those skilled in the art known.
Described data processing module 16 determines that according to signal receiving module 15 received tach signals current rotating speed is in high velocity, middling speed district or low velocity zone.Specifically, being about to electrical signal conversion is the data of representative rotating speed, the critical speed of rotation value of current rotating speed with the high velocity of presetting, middling speed district, low velocity zone is compared, to determine which district current rotating speed is in again.For example, the critical speed of rotation value of default high velocity is 4000 rev/mins, and the critical speed of rotation value of low velocity zone is 3000 rev/mins, if current rotating speed is 3500 rev/mins, then current rotating speed is in the middling speed district.The critical speed of rotation value of described default high velocity, middling speed district, low velocity zone determines according to different situations, for those skilled in the art known.Described data processing module 16 comprises comparison circuit, its structure and to be connected to those skilled in the art known.
Described control output module 17 is according to current rotating speed, control the state of first control valve 11 and second control valve 12: current rotating speed is in low velocity zone, and described control output module 17 output controls first control valve 11 is positioned at the control signal that the first state A, second control valve 12 are positioned at third state C; Current rotating speed is in the middling speed district, and described control output module 17 output controls first control valve 11 is positioned at the control signal that the first state A, second control valve 12 are positioned at four condition D; Current rotating speed is in high velocity, and described control output module 17 output controls first control valve 11 is positioned at the control signal that the second state B, second control valve 12 are positioned at four condition D.Concrete state transition table sees Table 1.Thus, can be according to the operating mode difference of rotating speed, and the suction tude of different length is provided.Described control output module 17 comprises the D/A change-over circuit, is used for digital controlled signal is converted to analog control signal.The structure of described D/A change-over circuit and to be connected to those skilled in the art known.
Table 1
Introduce workflow of the present invention at low speed, middling speed, each operating mode of high speed below.
As shown in Figure 4, when engine start, the data processing module 16 of ECU 14 detected motor according to speed probe 18 and was in the low speed operating mode this moment, first control valve 11 is in the first state A, second control valve 12 is in third state C, air-flow is flowed into by resonant cavity 10, the one-level of flowing through gas-distributing pipe 7 and three grades of gas-distributing pipes 9, then the suction tude of airflow passes is longer, and the resonant pressure wave-wave is grown up, the kinetic energy that inner air tube flows increases, cause induction air flow ratio to be accelerated, form pressurized effect, charging efficiency improves, under same combustion condition, can obtain bigger output power, increase moment of torsion.
As shown in Figure 5, when the data processing module 16 of ECU 14 detects motor and is in the middling speed operating mode according to speed probe 18, first control valve 11 is in the first state A, second control valve 12 is in four condition D, then air-flow is flowed into by resonant cavity 10, flow through secondary gas-distributing pipe 8 and three grades of gas-distributing pipes 9, and the suction tude of airflow passes is short during than low speed, so the resonant pressure wavelength is short, make motor obtain corresponding torque and power.And as shown in Figure 8, this moment, engine volume coefficiency was pressed curve 19 variations, efficiently solved the shortcoming that occurs trough in the prior art in the middling speed district as can be seen, had improved the internal volume efficient in the middling speed district.
As shown in Figure 6, when the data processing module 16 of ECU 14 detects motor and is in high-speed working condition according to speed probe 18, first control valve 11 is in the second state B, second control valve 12 is in four condition D, and then air-flow flows into the three grades of gas-distributing pipes 9 of directly flowing through by resonant cavity 10, the suction tude of airflow passes is the shortest, so the resonant pressure wavelength is the shortest, reduce the air inlet flow losses, improve two-forty power.
Claims (9)
1. variable inlet duct, this suction tude comprises gas-distributing pipe, control valve resonant cavity (10); Wherein, described gas-distributing pipe comprises one-level gas-distributing pipe (7), secondary gas-distributing pipe (8) and three grades of gas-distributing pipes (9), and one-level gas-distributing pipe (7), secondary gas-distributing pipe (8) and three grades of gas-distributing pipes (9) are parallel with one another; Described resonant cavity (10) has the outlet of suction port (13), three grades of gas-distributing pipes of connection (9) and is communicated with the outlet of one-level gas-distributing pipe (7), secondary gas-distributing pipe (8); Described control valve comprises first control valve (11) and second control valve (12), first control valve (11) control be communicated with resonant cavity (10) and three grades of gas-distributing pipes (9) outlet, is communicated with the switching of resonant cavity (10) and the outlet of one-level gas-distributing pipe (7), secondary gas-distributing pipe (8), second control valve (12) control connection resonant cavity (10) and secondary gas-distributing pipe (8) outlet, be communicated with the switching of the outlet of secondary gas-distributing pipe (8) and one-level gas-distributing pipe (7).
2. suction tude according to claim 1, wherein, described resonant cavity (10) is positioned between three grades of gas-distributing pipes (9) and the secondary gas-distributing pipe (8).
3. suction tude according to claim 1, wherein, the caliber of the caliber＜three grade gas-distributing pipe (9) of the caliber of one-level gas-distributing pipe (7)＜secondary gas-distributing pipe (8), the pipe range of the pipe range＞three grade gas-distributing pipe (9) of the pipe range of one-level gas-distributing pipe (7)＞secondary gas-distributing pipe (8).
4. suction tude according to claim 3, wherein, the caliber of one-level gas-distributing pipe (7): the caliber of secondary gas-distributing pipe (8): the caliber of three grades of gas-distributing pipes (9) is 1: 1.4～1.6: 1.8～2, the pipe range of one-level gas-distributing pipe (7): the pipe range of secondary gas-distributing pipe (8): the pipe range of three grades of gas-distributing pipes (9) is 5～8: 3～5: 1.
5. suction tude according to claim 1, wherein, described first control valve (11) and second control valve (12) are solenoid electric valve.
6. suction tude according to claim 5, wherein, described first control valve (11) and second control valve (12) are the one chip valve, rotate state with an end of monolithic as rotating center respectively with the switching controls valve, the rotating center of described first control valve (11) is positioned on the tube wall of resonant cavity (10), and the rotating center of described second control valve (12) is positioned on the tube wall of secondary gas-distributing pipe (8);
First control valve (11) has two states, be positioned at first state (A), the port closing that is communicated with resonant cavity (10) and three grades of gas-distributing pipes (9), being communicated with resonant cavity (10) opens with the outlet of one-level gas-distributing pipe (7), secondary gas-distributing pipe (8), be positioned at second state (B), the port closing that is communicated with resonant cavity (10) and one-level gas-distributing pipe (7), secondary gas-distributing pipe (8) is communicated with resonant cavity (10) and opens with the outlet of three grades of gas-distributing pipes (9);
Second control valve (12) has two states, be positioned at the third state (C), the port closing that is communicated with resonant cavity (10) and secondary gas-distributing pipe (8), being communicated with secondary gas-distributing pipe (8) opens with the outlet of one-level gas-distributing pipe (7), be positioned at four condition (D), the port closing that is communicated with secondary gas-distributing pipe (8) and one-level gas-distributing pipe (7) is communicated with resonant cavity (10) and opens with the outlet of secondary gas-distributing pipe (8).
7. gas handling system, this gas handling system comprises variable inlet duct, speed probe (18), electronic control unit (14), described electronic control unit (14) comprises signal receiving module (15), data processing module (16), control output module (17), described signal receiving module (15) is electrically connected with speed probe (18), and described control output module (17) is connected with the control valve of variable inlet duct; Wherein, described variable inlet duct is any described variable inlet duct of claim among the claim 1-6, the data processing module (16) of described electronic control unit (14) is judged current rotating speed according to the signal from speed probe (18) that data reception module (15) receives, and described control output module (17) is controlled the state of first control valve (11) and second control valve (12) according to current rotating speed.
8. gas handling system according to claim 7, wherein, described data processing module (16) determines that according to the received tach signal of signal receiving module (15) current rotating speed is in high velocity, middling speed district or low velocity zone.
9. gas handling system according to claim 7, wherein, described control output module (17) is controlled the state of first control valve (11) and second control valve (12) according to current rotating speed:
Current rotating speed is in low velocity zone, and described control output module (17) output control first control valve (11) is positioned at the control signal that first state (A), second control valve (12) are positioned at the third state (C);
Current rotating speed is in the middling speed district, and described control output module (17) output control first control valve (11) is positioned at the control signal that first state (A), second control valve (12) are positioned at four condition (D);
Current rotating speed is in high velocity, and described control output module (17) output control first control valve (11) is positioned at the control signal that second state (B), second control valve (12) are positioned at four condition (D).
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| CNB200510135255XA CN100458115C (en) | 2005-12-29 | 2005-12-29 | Variable inlet duct and inlet system containing same |
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| CNB200510135255XA CN100458115C (en) | 2005-12-29 | 2005-12-29 | Variable inlet duct and inlet system containing same |
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| CN100458115C true CN100458115C (en) | 2009-02-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102691566A (en) * | 2011-03-23 | 2012-09-26 | 马勒国际有限公司 | Combustion engine, fresh air system and associated operating method |
| CN102808709A (en) * | 2012-08-24 | 2012-12-05 | 安徽江淮汽车股份有限公司 | Variable air inlet manifold for gasoline engine |
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| CN102808709B (en) * | 2012-08-24 | 2015-03-25 | 安徽江淮汽车股份有限公司 | Variable air inlet manifold for gasoline engine |
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| CN1995716A (en) | 2007-07-11 |
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