CN101608560B - Electrohydraulically controlled motor air distribution system - Google Patents
Electrohydraulically controlled motor air distribution system Download PDFInfo
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- CN101608560B CN101608560B CN2008101205573A CN200810120557A CN101608560B CN 101608560 B CN101608560 B CN 101608560B CN 2008101205573 A CN2008101205573 A CN 2008101205573A CN 200810120557 A CN200810120557 A CN 200810120557A CN 101608560 B CN101608560 B CN 101608560B
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- air distribution
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Abstract
The invention relates to a motor air distribution system, in particular to a motor inlet (outlet) air valve control device. The motor air distribution system comprises an air valve rod, a hydraulic oil cylinder and a hydraulic oil line, wherein the piston of the hydraulic oil cylinder is connected with the air valve rod; an oil inlet is connected with the oil line of a reversing valve; one path of the reversing valve is connected with a high-pressure oil line and the other path of the reversing valve is connected with a low-pressure loop; and the reversing valve is controlled by an electromagnetic switch. The reversing valve can realize the connection of the hydraulic oil cylinder with the high-pressure oil line or the low-pressure loop. When the hydraulic oil cylinder is connected with the high-pressure oil line, oil taking starts and the piston moves downward to open the air valve; and when the hydraulic oil cylinder is connected with the low-pressure loop, oil return starts and the piston moves upward to gradually close the air valve. The change of the reversing valve is controlled by the electromagnetic switch, so the opening and closing of the air valve can be realized by controlling the opening and closing of an electromagnetic valve. The motor air distribution system has the characteristics of simple structure, convenient production and processing, flexible control, long service life, low cost and the like.
Description
Technical field
The present invention relates to a kind of engine air distribution system, what especially relate to a kind of motor advances (row) valve control apparatus.
Background technique
Traditional engine valve actuating mechanism mainly contains the complicated driving mechanism of a cover, is made up of parts such as Transmitted chains (or Timing Belt, tappet), timing chain (band) tensioning mechanism, timing sprocket (or timing gear), camshaft, rocking arm, rocker-arm roller pin, valve, valve guide bushing, valve spring.The port timing of motor directly influences the intake and exhaust performance, and combustion process is played crucial effects.The selection of port timing should be considered the fuel economy under the high-speed power, low speed torque, idling oil consumption, sub load of motor, takes into account problems such as low-speed stability and toxic emission again.The complex structure of traditional cam engine valve actuating gear, easy to wear, adjustment maintenance difficult and loaded down with trivial details, and port timing is a basic fixed, can not change along with the variation of engine speed, only choose a kind of half-way house of taking into account engine performance under the various operating modes by various port timing test, best valve timing can not be provided in all cases, and engine performance is not in full use.In order to address these problems, people had once attempted some and had adopted the method for electronic air distributing, application number is that 200510041311.3 patent of invention discloses a kind of electrically controlled gas valve executing mechanism, is made of the de-noising spring that is provided with between the calutron of housing, housing inner bottom part, the stroke adjustment screw rod that runs through the calutron axial central through hole, stroke adjustment screw rod upper end and the housing inner top.This invention is adopted magnetic switch directly to control valve and is opened and closed, but because in the working procedure of motor, need the realization intake valve to delay and open and the slow pass of exhaust valve, to regulate valve overlap, and the control of magnetic switch can only be carried out the switching of moment, so gas distribution system is difficult to reach optimum efficiency, and be not easy to existing traditional non-full electric-control motor is reequiped, therefore this invention is limited to the improvement meaning of engine valve.Application number is that foreign patents such as US4930464, US5456221 have realized by the oil circuit one control air valve, the process of coming control oil channel again by solenoid valve that has, reached effect preferably, but because the structure of these patent disclosures is too complicated, so their manufacture difficulty is big, cost is higher, and bigger to the change of cylinder head, can have influence on the mechanical property of cylinder head to a certain extent.
Summary of the invention
The present invention solves existing in prior technology complex structure, easy to wear, the technical problem that is difficult to regulate valve overlap etc., provide a kind of simple in structure, long service life, employing electricity liquid Comprehensive Control, to reach the engine air distribution system composite control apparatus of best distribution effect.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of engine air distribution system of electric liquid Comprehensive Control, comprise a valve stem, hydraulic jack and hydraulic circuit, the piston rod that it is characterized in that described hydraulic jack links to each other with valve stem, filler opening links to each other with the oil circuit of a selector valve, this selector valve one tunnel links to each other with high-pressure oil passage, another road links to each other with low tension loop, and described selector valve is controlled by a magnetic switch.Link to each other by selector valve realization hydraulic jack or with high-pressure oil passage, perhaps link to each other with low tension loop.Begin oil-feed when hydraulic jack links to each other with high-pressure oil passage, piston moves downward, and opens valve; Hydraulic jack begins oil return when linking to each other with low tension loop, and piston moves upward, and valve is closed gradually.The conversion of selector valve is controlled by a magnetic switch, so, as long as the switching of control electromagnetic valve just can realize the switching of valve.
As preferably, described selector valve is 23 logical valves.23 logical valves can be controlled the oil circuit of hydraulic jack or link to each other with high-pressure oil passage by the conversion valve position, or link to each other with low tension loop, realize oil-feed or oil return, and then the switching of realization valve.Simple and reliable for structure, and be easy to control.
As preferably, described high-pressure oil passage is provided with a throttle valve.In order to control the speed of valve opening, need hydraulic oil be adjusted to certain flow velocity by this throttle valve, the movement velocity of control hydraulic cylinder piston is with control valve opening speed.
As preferably, the oil circuit between the throttle valve on described selector valve and the high-pressure oil passage communicates with an accumulator.Remedy losing of hydraulic oil,, strengthen the afterflow ability of hydraulic system to reduce pressure surge along stroke pressure.Change under the little situation in solenoid valve self response characteristic like this, make solenoid valve in system, only play switch, guarantee its negotiability, reduce the influence of solenoid valve system responses greater than system requirements.
As preferably, described low tension loop is provided with a throttle valve.In order to reach the effect of valve Slow Close, need hydraulic oil be adjusted to certain flow velocity by this throttle valve, the movement velocity of control hydraulic cylinder piston.
As preferably, the magnetic switch of described throttle valve, selector valve is connected with an ECU (Electrical Control Unit) line respectively.The motor phase signal that ECU (Electrical Control Unit) transmits according to various inductors, dtc signal, pressure signal are regulated magnetic switch automatically, requirements such as the switching of realization valve, slow open and close, valve overlap.
As preferably, ECU (Electrical Control Unit) is connected with the plurality of sensors line.Described sensor comprises top dead center position sensor, speed probe, pressure transducer etc.
As preferably, described hydraulic jack is unidirectional oil cylinder, is equipped with on the described valve stem and connects a pressure spring.When hydraulic jack linked to each other with high-pressure oil passage, piston rod moved downward, and opened valve, compressed above-mentioned pressure spring simultaneously, storage of potential energy; When hydraulic jack linked to each other with the low pressure road, piston rod moved upward, and piston rod moves upward under the acting in conjunction of ambient pressure and pressure spring, closes valve.
As preferably, the high pressure oil of described high-pressure oil passage by engine high pressure altogether rail provide, and be provided with a pressure regulator valve.High-pressure common rail is a kind of structure of widespread usage in diesel engine, and the present invention is from Economy and operability, with the power source of high-pressure common rail as high-pressure oil passage.Described pressure regulator valve can be regulated the pressure of oil circuit.
As preferably, described high-pressure oil passage is provided with an oil hydraulic pump, and is provided with a pressure regulator valve.Oil hydraulic pump provides power source for high-pressure oil passage.This mode is mainly used in the petrol engine.Described pressure regulator valve can be regulated the pressure of oil circuit.
The beneficial effect that brings of the present invention is, to the independent flexibly control of parameters such as valve timing, valve lift and valve opening duration, the performance characteristic (valve opening is closed the response time) of system and the rotating speed load of motor are adapted, realize the multiple adjusting of distribution parameter, to satisfy of the requirement of different operating modes, fully optimize engine performance to compression ratio, air fuel ratio.
Therefore, the present invention has simple in structure, production and processing is convenient, control flexibly, characteristics such as long service life, cost be low.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is a kind of structural representations of the present invention.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment 1:
Accompanying drawing 1 is a kind of structural representation of the present invention, and it has a hydraulic jack 1, and the piston rod 4 of hydraulic jack links to each other with valve stem, is equipped with on the valve stem and is connecting a pressure spring 3.The oil circuit of hydraulic jack links to each other with a selector valve, and this selector valve is 23 logical valves, and links to each other with ECU (Electrical Control Unit) by an electromagnetic valve circuit.Its one of them valve position is connected with high-pressure oil passage, and another valve position is connected with low tension loop.High-pressure oil passage is provided with a throttle valve, and throttle valve links to each other with ECU (Electrical Control Unit) by the throttle valve circuit.On the oil circuit between the throttle valve selector valve, there is an accumulator to be communicated with it.High-pressure oil passage provides power by the high pressure co-rail system of diesel engine, and is provided with a pressure regulator valve, is used to control oil pressure, and a pressure transducer is arranged, and this pressure transducer links to each other with ECU (Electrical Control Unit) by circuit.The low pressure oil circuit is provided with a throttle valve, and this throttle valve links to each other with ECU (Electrical Control Unit) by the throttle valve circuit.
The present invention in use, ECU (Electrical Control Unit) is sent each valve of command control according to the various kinds of sensors signal.When the hydraulic jack oil circuit was connected with high-pressure oil passage, hydraulic oil entered hydraulic jack, and piston 2 moves downward, and opened valve by piston rod, valve stem.In this process, throttle valve is regulated the flow velocity of high-pressure oil passage according to the instruction of ECU (Electrical Control Unit), with the movement velocity of control valve.When the hydraulic jack oil circuit is connected with low tension loop, carry out oil return, hydraulic piston moves upward, and throttle valve is regulated the flow velocity of oil return according to the instruction of ECU (Electrical Control Unit).ECU (Electrical Control Unit) is according to information such as engine speed and load, top dead center position, throttle position, intake temperature, cooling water temperatures, regulate the running parameter of input pressure (mainly being the power of regulating valve opening and closing) and throttling arrangement, the performance characteristic (valve opening and close the response time) of system is adapted with rotating speed, realize the real-time regulated of distribution parameter.
Embodiment 2:
Accompanying drawing 2 is a kind of structural representations of the present utility model, with embodiment 1 similar it a hydraulic jack 1 is arranged, the piston rod 4 of hydraulic jack links to each other with valve stem, is equipped with on the valve stem and is connecting a pressure spring 3.The oil circuit of hydraulic jack links to each other with a selector valve, and this selector valve is 23 logical valves, and links to each other with ECU (Electrical Control Unit) by an electromagnetic valve circuit.Its one of them valve position is connected with high-pressure oil passage, and another valve position is connected with low tension loop.High-pressure oil passage is provided with a throttle valve, and throttle valve links to each other with ECU (Electrical Control Unit) by the throttle valve circuit.On the oil circuit between the throttle valve selector valve, there is an accumulator to be communicated with it.The low pressure oil circuit is provided with a throttle valve, and this throttle valve links to each other with ECU (Electrical Control Unit) by the throttle valve circuit.
Be that with embodiment 1 difference high-pressure oil passage provides power by a hydraulic-pressure pump, also be provided with a pressure regulator valve simultaneously, be used to control oil pressure, and a pressure transducer is arranged, this pressure transducer links to each other with ECU (Electrical Control Unit) by circuit.
So that the present invention has is simple in structure, cost is low, to the manufacturing of engine air distribution system with transform all simple and convenient.
Claims (7)
1. the engine air distribution system of an electric liquid Comprehensive Control, comprise a valve stem, hydraulic jack and hydraulic circuit, the piston rod that it is characterized in that described hydraulic jack links to each other with valve stem, filler opening links to each other with the oil circuit of a selector valve, this selector valve one tunnel links to each other with high-pressure oil passage, another road links to each other with low tension loop, and described selector valve is controlled by a magnetic switch, and described low tension loop is provided with a throttle valve.
2. the engine air distribution system of a kind of electric liquid Comprehensive Control according to claim 1 is characterized in that described selector valve is 23 logical valves.
3. the engine air distribution system of a kind of electric liquid Comprehensive Control according to claim 1 is characterized in that described high-pressure oil passage is provided with a throttle valve.
4. the engine air distribution system of a kind of electric liquid Comprehensive Control according to claim 3 is characterized in that the oil circuit between the throttle valve on described selector valve and the high-pressure oil passage communicates with an accumulator.
5. the engine air distribution system of a kind of electric liquid Comprehensive Control according to claim 1 is characterized in that described hydraulic jack is unidirectional oil cylinder, is equipped with on the described valve stem and connects a pressure spring.
6. according to the engine air distribution system of claim 1 or 2 or 3 described a kind of electric liquid Comprehensive Control, it is characterized in that the high pressure oil in the described high-pressure oil passage is provided by the engine high pressure common rail system, and be provided with a pressure regulator valve.
7. according to the engine air distribution system of claim 1 or 2 or 3 described a kind of electric liquid Comprehensive Control, it is characterized in that described high-pressure oil passage is provided with an oil hydraulic pump, and be provided with a pressure regulator valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101205573A CN101608560B (en) | 2008-08-20 | 2008-08-20 | Electrohydraulically controlled motor air distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101205573A CN101608560B (en) | 2008-08-20 | 2008-08-20 | Electrohydraulically controlled motor air distribution system |
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| Publication Number | Publication Date |
|---|---|
| CN101608560A CN101608560A (en) | 2009-12-23 |
| CN101608560B true CN101608560B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101205573A Expired - Fee Related CN101608560B (en) | 2008-08-20 | 2008-08-20 | Electrohydraulically controlled motor air distribution system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975098B (en) * | 2010-09-30 | 2012-12-19 | 哈尔滨工程大学 | Camless electrohydraulic variable valve timing system based on fuel medium |
| CN102278161B (en) * | 2011-07-19 | 2013-07-24 | 天津大学 | Cushioning hydraulic cylinder for variable valve |
| CN103806973B (en) * | 2012-11-07 | 2016-04-27 | 广西玉柴机器股份有限公司 | Engine electric-controlled hydraulic pressure gas distribution system |
| CN103388502B (en) * | 2013-07-31 | 2016-01-27 | 哈尔滨工程大学 | A kind of full changeable electro-hydraulic air valve drive unit |
| CN103953427A (en) * | 2014-03-21 | 2014-07-30 | 哈尔滨工程大学 | Electro-hydraulic driving exhaust mechanism |
| DE102016205910A1 (en) * | 2016-04-08 | 2017-10-12 | Mtu Friedrichshafen Gmbh | Valve drive for the variable control of an intake valve and an exhaust valve and internal combustion engine with such a valve train |
| CN107100689B (en) * | 2017-06-28 | 2023-04-07 | 吉林大学 | Electromagnetic control hydraulic drive type fully-variable valve mechanism |
| CN110864122B (en) * | 2019-12-12 | 2022-02-08 | 北京华横科技有限公司 | Pressure regulating valve and hydraulic system |
| CN111156064B (en) * | 2019-12-25 | 2022-05-10 | 浙江吉利新能源商用车集团有限公司 | Electric control valve structure and engine |
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- 2008-08-20 CN CN2008101205573A patent/CN101608560B/en not_active Expired - Fee Related
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| CN101608560A (en) | 2009-12-23 |
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Granted publication date: 20111130 Termination date: 20120820 |