CN1959072B - Electrohydraulic controlled continuously variable gas distribution timing system in internal-combustion engine - Google Patents
Electrohydraulic controlled continuously variable gas distribution timing system in internal-combustion engine Download PDFInfo
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- CN1959072B CN1959072B CN200610069982A CN200610069982A CN1959072B CN 1959072 B CN1959072 B CN 1959072B CN 200610069982 A CN200610069982 A CN 200610069982A CN 200610069982 A CN200610069982 A CN 200610069982A CN 1959072 B CN1959072 B CN 1959072B
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Abstract
A continuous variable valve actuating-timing system controlled by electrohydraulic control and set on internal combustion engine is prepared as using entrance one-way valve to control oil intake of hydraulic cylinder and using one-way solenoid valve to control oil exhaust of hydraulic cylinder, using rise-up section of valve actuating cam to control open and rise-up of air door and controlling close and drop-down of air door by depending upon exhausting time of liquid in hydraulic cylinder.
Description
Technical field
The present invention relates to technical field of internal combustion engines, specifically is a kind of gas distribution system of ignition internal combustion engine.
Background technique
It is to realize by the inflammable mixture quantity that change enters in the cylinder that ignition internal combustion engine is regulated load, promptly changes the inflammable mixture quantity that enters in the cylinder by regulating throttle opening.When internal-combustion engine rotational speed was constant, throttle opening increased, and the inflammable mixture quantity that enters in the cylinder increases the corresponding increase of the output power of internal-combustion engine; Otherwise, then reduce.When internal-combustion engine was under the medium and small load condition work, because throttle opening is little, the pumping loss of internal-combustion engine will significantly increase, and finally caused the fuel oil consumption to increase.The desirable valve timing of internal-combustion engine is to have to have bigger air inlet when angle, high speed are closed in less air inlet late and close the angle late when low speed in addition, to satisfy the requirement of power character and Economy.Though some internal-combustion engine is realized variable cam mechanism or changeable air valve timing mechanism by the exchange cam molded lines.But these mechanisms can not realize the continuous variable of valve timing, thereby have low oil consumption can not satisfy the medium and small load of internal-combustion engine the time, can realize powerful demand during high rotating speed.
Summary of the invention
In order to overcome deficiency and the defective that above-mentioned prior art exists, the purpose of this invention is to provide a kind of continuously variable gas distribution timing system in internal-combustion engine of electrichydraulic control.It makes the valve timing of internal-combustion engine can continuous variable, can control the amount of gas that enters in the cylinder effectively.
Technological scheme of the present invention is: the continuously variable gas distribution timing system in internal-combustion engine of this kind electrichydraulic control, comprise camshaft transmitting assemblies, valve assembly, it is characterized in that the valve cam in the described camshaft transmitting assemblies drives tappet, tappet can place in the hydraulic cylinder with moving axially, the part outside disc of tappet and the sealing of hydraulic cylinder inwall one end, the hydraulic cylinder inwall the other end is and the hydraulic piston of inboard wall of cylinder block sealing that hydraulic piston drives valve opening and closes; Be provided with the tappet return spring in the cylinder body, on the hydraulic cylinder outer wall, be provided with import one-way valve, the inflow and the outflow of controlling liquid respectively of outlet one-way valve.
Described outlet one-way valve is a unidirectional electrical magnet aid force valve, and the electromagnetic coil of this electromagnetism remote valve is electrically connected with a circuit breaker, and electromagnetic coil being opened and being closed by circuit breaker control power supply.
Described circuit breaker comprises shell, in the enclosure base plate is set, deenergizing switch, with the corresponding switch contact of deenergizing switch, outage cam etc.; Base plate and the coaxial installation of outage cam, deenergizing switch and contact thereof are fixed on the base plate, and an end of deenergizing switch is installed on the base plate by fulcrum shaft, is provided with Returnning spring between the other end and the base plate; Outage cam and valve cam rotate synchronously; Deenergizing switch, contact can be rotated an angle arbitrarily around the outage camshaft in company with base plate.
The valve cam molded lines is made up of ascent stage, flat section and descending branch, and the shared cam angle of flat section is more than or equal to 60 °.
Valve assembly of the present invention and ordinary internal combustion engine are basic identical, are made up of valve, valve seat, valve guide bushing, valve spring and cotter seat etc.Described camshaft transmitting assemblies is by crank-driven, and the rotating ratio of camshaft and bent axle is 1: 2, and wherein the valve cam molded lines is made up of ascent stage, flat section and descending branch, and when cam follower was positioned at flat section, its lift remained unchanged.
The working procedure of this gas distribution system can be divided into three phases:
Phase I is valve opening and rising stage. all closes at this stage import one-way valve and unidirectional electrical magnet aid force valve, the liquid of oil hydraulic cylinder is in closed state, tappet promotes valve opening and rising by hydraulic oil and hydraulic piston under the driving of cam ascent stage, this stage valve lift depends primarily on cam profile.
Second stage is that valve falls the stage after rise.This stage tappet is on the cam flat section, and its lift remains unchanged.After unidirectional electrical magnet aid force valve was de-energized, electromagnetic force disappeared, and the electromagnetism remote valve is opened, and hydraulic oil is discharged from oil hydraulic cylinder, and valve drops down onto valve seat next time in the effect of valve spring, and this stage valve lift and cam profile are irrelevant.
Phase III is that tappet falls the stage after rise, and when cam profile was in descending branch, tappet fell after rise under the effect of tappet spring, and the oil hydraulic cylinder internal pressure reduces, and the import one-way valve is opened, and hydraulic oil is inhaled in the cylinder body.When tappet fell after rise to cam base circle, fluid pressure and ambient pressure were basic identical in the oil hydraulic cylinder, and the import one-way valve is promptly closed.Unidirectional electrical magnet aid force valve also is in the state that closes after the energising, has begun next circuit valve opening-closing process when cam goes to the ascent stage again.
As mentioned above, irrelevant in valve falling stage valve lift and cam profile, the decline of valve and close moment depend on the drainage moment of liquid in the oil hydraulic cylinder.The present invention is by the drainage moment of liquid in the unidirectional electrical magnet aid force valve control oil hydraulic cylinder, described unidirectional electrical magnet aid force valve is controlled by circuit breaker, the deenergizing switch of circuit breaker and switch contact can be with base plate around outage camshaft rotating certain angle, thereby the outage and the pairing port timing of switching on of unidirectional electrical magnet aid force valve electromagnetic coil have been changed, promptly change the time that valve falls after rise and takes a seat, reached the purpose of valve timing continuous variable.
The invention has the beneficial effects as follows: adopt this gas distribution system can cancel closure for ignition internal combustion engine; Close the angle late by the change air inlet and regulate air inflow, reduce the purpose that pumping loss is improved fuel economy thereby reach; In like manner,, realize the continuous variable of valve timing, realize suitable internal EGR rate, reduce oil consumption, reduce toxic emission by changing exhaust regularly; Can realize high-powerly when the demand when making valve timing satisfy the high rotating speed of internal-combustion engine, high rotating speed, improve the power character of internal-combustion engine.This gas distribution system is specially adapted to ignition internal combustion engine.Can improve power performance and improve emission performance by changing valve timing for ordinary internal combustion engine.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of circuit breaker in the embodiment of the invention.
Among the figure: 1 valve cam, 2 tappets, 3 hydraulic cylinders, 4 tappet return springs, 5 electromagnetic valve bodies, 6 electromagnetic coils, 7 solenoid valve springs, 8 hydraulic pistons, 9 valve spring, 10 valves, 11 check valve body, 12 check valve springs, 13 shells, 14 deenergizing switchs, 15 contacts, 16 outage cams, 17 base plates, 18 gear rings, 19 tooth bars, 20 Returnning springs.
Embodiment
Describe working procedure of the present invention in detail below in conjunction with accompanying drawing.In Fig. 1, the left side is an import one-way valve part, comprises check valve body 11, check valve spring 12 etc.; The right side is a unidirectional electrical magnet aid force valve portion, comprises electromagnetic valve body 5, electromagnetic coil 6 and solenoid valve spring 7 etc.; The middle part is a valve actuating mechanism, comprises valve cam 1, tappet 2, tappet return spring 4, hydraulic cylinder 3, hydraulic piston 8, valve spring 9 and valve 10 etc.Valve cam 1 in the camshaft transmitting assemblies drives tappet 2, tappet 2 can place in the hydraulic cylinder 3 with moving axially, the part outside disc of tappet 2 and the sealing of hydraulic cylinder inwall one end, the hydraulic cylinder 3 inwall the other ends are and the hydraulic piston 8 of inboard wall of cylinder block sealing that hydraulic piston 8 drives valve 10 opening and closing; Be provided with tappet return spring 4 in the cylinder body.The electromagnetic coil 6 of electromagnetism remote valve is electrically connected with a circuit breaker, and electromagnetic coil being opened and being closed by circuit breaker control power supply.The import one-way valve is decided by the fluid pressure size in the hydraulic cylinder 3 and opens or close.The molded lines of valve cam 1 is made up of ascent stage, flat section and descending branch, and the shared cam angle of flat section is more than or equal to 60 °.
Fig. 2 is the breaker structure schematic representation, comprising compositions such as circuit breaker shell 13, deenergizing switch 14, contact 15, outage cam 16, base plate 17, gear ring 18, tooth bar 19 and Returnning spring 20. base plate 17 is arranged in the shell 13, base plate and the 16 coaxial installations of outage cam, deenergizing switch 14 and contact thereof are fixed on the base plate 17, one end of deenergizing switch is installed on the base plate by fulcrum shaft, is provided with Returnning spring 20 between the other end and the base plate; Outage cam 16 rotates synchronously with valve cam 1, rotating speed is that the excircle of 1/2nd, base plates of speed of crankshaft is provided with gear ring 18, tooth bar 19 cooperates with this gear ring, the deenergizing switch of circuit breaker, contact can rotate an angle arbitrarily around the outage camshaft in company with base plate. when outage cam 16 during with deenergizing switch 14 jack-up, deenergizing switch 14 disengages with contact 15, and electromagnetic coil 6 is de-energized; When outage cam 16 not during jack-up deenergizing switch 14, Returnning spring 20 keeps in touch deenergizing switch 14 and contact 15, and electromagnetic coil 6 is in "on" position.
This gas distribution system working principle is as follows:
Phase I is the valve opening stage.Drive tappet 2 in the ascent stage of this stage valve cam 1 and move down, make oil pressure rising in the oil hydraulic cylinder, under the acting in conjunction of oil pressure and check valve spring 12, the import one-way valve is in closed condition in cylinder.Meanwhile electromagnetic coil 6 is in "on" position under the control of circuit breaker, though oil pressure is higher in the oil hydraulic cylinder, the electromagnetic force that electromagnetic coil 6 produces makes the electromagnetism remote valve also be in the state of closing.The hydraulic oil of tappet 2 in the driving lower compression oil hydraulic cylinder of valve cam 1, the elastic force that makes hydraulic piston 8 overcome valve spring 9 promote valve 10 and open, and depend primarily on the molded lines of cam 1 in this stage valve lift.
Second stage is that valve falls the stage after rise.Be in flat section of maximum lift at this stage cam 1, tappet 2 moves down into maximum lift position.When outage cam 16 turns to the position that contact 15 is backed down, deenergizing switch 14 makes electromagnetic coil 6 be in off-position, the electromagnetic force of electromagnetism remote valve disappears thereupon, high pressure oil in the oil hydraulic cylinder under the promotion of valve spring 9 and piston 8 with electromagnetism reinforcement valve open, hydraulic oil flow goes out oil hydraulic cylinder, and valve 10 is closed thereupon.Obviously the power-cut time that should stage valve close moment depends on deenergizing switch 14.Change the power-off time of deenergizing switch 14, can change the size that the angle is closed in air inlet late.In addition, excessive for preventing that air valve drop from impacting, when will taking a seat, adopt at valve the mode of throttling to control valve crash speed.
Phase III is that tappet falls the stage after rise.When cam 1 goes to descending branch when contacting with tappet 2, tappet 2 falls after rise under the effect of tappet return spring 4, and oil pressure reduces in the oil hydraulic cylinder, the import one-way valve opens, and hydraulic oil is inhaled in the oil hydraulic cylinder.When tappet 2 falls after rise to the basic circle of cam 1, oil pressure will reach or approaching extraneous oil pressure in the oil hydraulic cylinder, and check valve spring 12 makes closed check valve.Before this stage finishes, outage cam 16 will forward the position of connecting deenergizing switch 14 to, and the electromagnetic force that electromagnetic coil 6 produces makes the electromagnetism remote valve be in the state of closing.When going to the ascent stage again, valve cam 1 begun next circuit valve opening-closing process.
In circuit breaker shown in Figure 2, deenergizing switch 14 and contact 15 thereof are installed on the contact-breaker plate 17, and base plate 17 cylindricals stud with gear ring 18, can rotate any one angle around the center line of outage camshaft at the effect lower shoe 17 of tooth bar 19.When internal-combustion engine is in a certain fixed rotating speed, base plate 17 suitable sense of rotation of cutting off the power supply cams 16 are turned over Φ
1During the angle, the phase angle that deenergizing switch 14 is backed down is with corresponding postponement 2 Φ
1The Shaft angle of writing music, the also corresponding postponement in the phase angle that the electromagnetism remote valve is opened, the phase angle that makes air valve drop is also with corresponding postponement 2 Φ
1The Shaft angle of writing music; In like manner, the sense of rotation with base plate 17 contrary outage cams 16 turns over Φ
2During the angle, the phase angle that deenergizing switch 14 is backed down shifts to an earlier date corresponding, causes the phase angle of air valve drop will shift to an earlier date 2 Φ
2The Shaft angle of writing music.Because Φ
1Or Φ
2Can realize continuous variable, therefore can make air inlet close late angle or exhaust close the angle late can continuous variable.Change the quantity that enters inflammable mixture in the cylinder of internal-combustion engine because the big I at angle is closed in air inlet late, therefore regulate the position of base plate 17, can change the inflammable mixture quantity that enters cylinder.Thereby realize removing closure, reduce the purpose of pumping loss.
Because the hydraulic oil of this system is identical with cylinder oil, so its hydraulic system and engine lubrication system can be merged into a system.
According to such scheme, it is not difficult that the those skilled in the art in present technique field implement the present invention.
Claims (2)
1. the continuously variable gas distribution timing system in internal-combustion engine of an electrichydraulic control, comprise camshaft transmitting assemblies, valve assembly, valve cam in the described camshaft transmitting assemblies drives tappet, tappet can place in the hydraulic cylinder with moving axially, the part outside disc of tappet and the sealing of hydraulic cylinder inwall one end, the hydraulic cylinder inwall the other end is and the hydraulic piston of inboard wall of cylinder block sealing that hydraulic piston drives valve; Be provided with the tappet return spring in the cylinder body, it is characterized in that, the hydraulic cylinder outer wall is provided with import one-way valve, the outlet one-way valve that controlling liquid flows into and flows out; Described outlet one-way valve is a unidirectional electrical magnet aid force valve, and the electromagnetic coil of this electromagnetism remote valve is electrically connected with a circuit breaker, and electromagnetic coil being opened and being closed by circuit breaker control power supply; The drainage of liquid the time that the control valve falls after rise and takes a seat, has reached the valve timing continuous variable constantly in the unidirectional electrical magnet aid force valve control oil hydraulic cylinder.2, the continuously variable gas distribution timing system in internal-combustion engine of a kind of electrichydraulic control according to claim 1, it is characterized in that, described circuit breaker comprises shell, in the enclosure base plate is set, deenergizing switch, with the corresponding switch contact of deenergizing switch, outage cam; Base plate and the coaxial installation of outage cam, deenergizing switch and contact thereof are fixed on the base plate, and an end of deenergizing switch is installed on the base plate by fulcrum shaft, is provided with Returnning spring between the other end and the base plate; Outage cam and valve cam rotate synchronously; The deenergizing switch of circuit breaker, contact can be rotated an angle arbitrarily around the outage camshaft in company with base plate.
3. the continuously variable gas distribution timing system in internal-combustion engine of a kind of electrichydraulic control according to claim 1 and 2 is characterized in that, the valve cam molded lines is made up of ascent stage, flat section and descending branch, and the shared cam angle of flat section is more than or equal to 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069982A CN1959072B (en) | 2006-11-13 | 2006-11-13 | Electrohydraulic controlled continuously variable gas distribution timing system in internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069982A CN1959072B (en) | 2006-11-13 | 2006-11-13 | Electrohydraulic controlled continuously variable gas distribution timing system in internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1959072A CN1959072A (en) | 2007-05-09 |
| CN1959072B true CN1959072B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610069982A Expired - Fee Related CN1959072B (en) | 2006-11-13 | 2006-11-13 | Electrohydraulic controlled continuously variable gas distribution timing system in internal-combustion engine |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705031A (en) * | 2012-06-20 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Stepless variable lift system of engine |
| CN102777225B (en) * | 2012-08-09 | 2014-04-02 | 杭州电子科技大学 | Controllable valve mechanism and valve timing adjustment method |
| CN104421007A (en) * | 2013-09-10 | 2015-03-18 | 谢庆生 | Adjustment method and device for independently and continuously adjusting gas distribution phase and gas valve lift |
| CN104405468A (en) * | 2014-09-30 | 2015-03-11 | 刘恩均 | Hydraulic valve opening/closing device of engine |
| CN105804827A (en) * | 2016-05-04 | 2016-07-27 | 哈尔滨工程大学 | Piezoelectrically-controlled pressure-intensified valve system |
| CN107060935B (en) * | 2017-03-24 | 2018-11-02 | 中国北方发动机研究所(天津) | A kind of hydraulic pressure variable valve device |
| CN107355276B (en) * | 2017-06-02 | 2018-11-02 | 中国北方发动机研究所(天津) | A kind of variable valve actuator for air of high hydraulic-driven |
| CN107143393B (en) * | 2017-06-02 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of internal combustion engine hydraulic variable valve mechanism |
| CN108240244B (en) * | 2017-12-29 | 2023-12-19 | 潍柴动力股份有限公司 | Variable system of diesel engine inlet valve and diesel engine |
| CN108661744B (en) * | 2018-03-30 | 2019-12-10 | 潍柴动力股份有限公司 | Engine intake valve continuous variable system and engine |
| CN108590796A (en) * | 2018-06-13 | 2018-09-28 | 哈尔滨工程大学 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
| CN108868959B (en) * | 2018-06-20 | 2020-12-22 | 潍柴动力股份有限公司 | Fault detection device of electromagnetic valve and oil pan for engine |
| CN110566304B (en) * | 2018-11-30 | 2022-04-22 | 长城汽车股份有限公司 | Valve train and control strategy for an engine having a low pressure EGR system |
| CN114811155B (en) * | 2021-12-20 | 2023-12-01 | 浙江宏昌电器科技股份有限公司 | Electromagnetic valve |
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- 2006-11-13 CN CN200610069982A patent/CN1959072B/en not_active Expired - Fee Related
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Owner name: JI'NAN QINGQI MOTORCYCLE CO., LTD. Free format text: FORMER OWNER: QINGQI MOTORCYCLE CO., LTD., JINAN Effective date: 20120329 |
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Effective date of registration: 20120329 Address after: 250014 No. 34 Heping Road, Lixia District, Shandong, Ji'nan Co-patentee after: Xie Zongfa Patentee after: Jinan Qingqi Motorcycle Co.,Ltd. Address before: 250014 No. 34 Heping Road, Lixia District, Shandong, Ji'nan Co-patentee before: Xie Zongfa Patentee before: Jinan Qingqi Motorcycle Co., Ltd. |
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Granted publication date: 20100512 Termination date: 20191113 |