CN101012763A - Energy-saving electric-hydraulic variable-valve control system - Google Patents
Energy-saving electric-hydraulic variable-valve control system Download PDFInfo
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- CN101012763A CN101012763A CN200710067187.7A CN200710067187A CN101012763A CN 101012763 A CN101012763 A CN 101012763A CN 200710067187 A CN200710067187 A CN 200710067187A CN 101012763 A CN101012763 A CN 101012763A
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Abstract
The invention discloses a control system for an energy saving electro-hydraulic air-changeable door, which can realize the recovery of energy and recycle, comprises constant pump, one-way valve, safe valve, energy storage device, hydraulic actuator, air door, pressure test device and high-speed switch valve. The hydraulic actuator comprises oil cylinder, piston and piston bar. The constant pump inputs energy to the energy storage device. The one-way valve between the energy storage device and the hydraulic pump can prevent the pressure oil in the energy storage device returning. The high-pressure energy storage device is connected with the pressure port of three-way high-speed switch valve and the left cavity of cylinder is connected with the control port of high-speed switch valve. When the right cavity of cylinder is not connected with the oil return port of high-speed switch valve, the oil return port of high-speed switch valve is connected with the oil tank. The energy storage device provides energy to the hydraulic actuator. As the pressure test device measures the pressure value at the outlet of energy storage device, energy is filled in the energy storage device in time so as to decrease the energy consumption of system greatly.
Description
Technical field
The present invention relates to the engine valve control system, especially relate to a kind of energy-saving electric-hydraulic variable-valve control system.
Background technique
Automobile has now become the traffic tool commonly used in people's daily life along with people's quality of life improves.Bringing people simultaneously easily, the problem of a sternness has also been proposed: high energy consumption and high pollution to people.The power source of automobile is a motor, and motor is the machine that the energy of a certain form is transformed into mechanical energy.The employed motor of Hyundai Motor mostly is internal-combustion engine, and internal-combustion engine is that the chemical energy of fuel combustion is transformed into heat energy, again heat energy is transformed into the machine of mechanical energy then.Finish this energy transforming process and generally will experience air inlet, compression, work done, four processes of exhaust, wherein air inlet and exhaust process are to be finished by the valve gear in the distribution device.And traditional valve mechanism is made up of camshaft, push rod, tappet, rocking arm and valve group, facts have proved that engine efficiency based on traditional valve mechanism is low, pollutant emission is serious, its valve lift, timing, unlatching duration all can't change according to actual conditions.The world today, energy saving and protection environment become main flow, and automobile is as a means of transportation that consumes a large amount of energy, its method for saving energy is the focus of various countries' research.For this reason, a kind of air valve variation mechanism (VVA) has just produced, and can be divided into driving mechanism and no camshaft drive based on camshaft by the difference of its driving mode.Air valve variation mechanism based on camshaft mainly comes part to optimize timing, lift, unlatching duration and other kinematic parameter of valve by exchange cam molded lines or camshaft phase angle, but this can not satisfy the requirement of real-time omnidistance control, and the performance of motor is still not very good.Therefore air valve variation mechanism based on no camshaft has just been proposed the eighties in last century, it can change the omnidistance kinematic parameter of adjusting valve according to holding actual conditions, realization is to the independent control of the continuous time of lift, movement velocity and unlatching of valve, thereby can obtain better fuel economy, more excellent moment of torsion and power characteristic, improve the discharging of idle stability and reduction pollutant, its fuel consume reduces 15% than traditional motor based on camshaft, and can satisfy Europe IV emission standard.No camshaft drive can be divided into electromagnetic type and electrolyte type two classes, wherein electromagnetic type adopts a pair of electromagnet with spring, in order to improve system's frequency response, need significantly improve vehicle voltage, brought the problem of Security like this, thereby can't realize that meanwhile air valve drop buffering, vibrations have influenced the life-span of motor greatly.In order to realize that the valve lift closed loop control also needs the precise displacement sensor and the powerful automatically controlled device of high frequency sound, the system cost height will certainly influence marketing like this.Electrolyte type air valve variation technology friend is divided into servocontrol, proportional control, switch control, and the air valve variation technology of electro-hydraulic servo control realizes as far back as the laboratory, but eliminated by industry owing to it involves great expense.Therefore, proportional control and switch are controlled in the electrolyte type air valve variation mechanism and have bigger potentiality.
Summary of the invention
The object of the present invention is to provide a kind of energy-saving electric-hydraulic variable-valve control system simple in structure, that frequency response is high and energy consumption is low.
The technical solution adopted in the present invention is:
The outlet of first metering pump links to each other with the inlet of first safety valve and the population of first one-way valve simultaneously, first safety valve outlet connected tank, inlet while and the outlet of first one-way valve, the outlet of second safety valve of second metering pump, the right chamber of the inlet of low pressure energy storage device, first pressure-detecting device and the oil hydraulic cylinder of hydraulic actuator links to each other; The second quantitative delivery side of pump links to each other with the inlet of second one-way valve; The outlet of high-voltage energy storage device enters the mouth with outlet, second safety valve of second one-way valve simultaneously, the pressure port of high-speed switch valve links to each other with the second pressure-detecting device inlet opening; The left chamber of the oil hydraulic cylinder in the hydraulic actuator links to each other with the control mouth of high-speed switch valve; The oil recirculating port connecting tank of high-speed switch valve; First pressure-detecting device is electrically connected with the control motor of first metering pump; Second pressure-detecting device is electrically connected with the control motor of second metering pump.
Second pressure-detecting device detects the outlet pressure value of high-voltage energy storage device, the motor that the control signal of output is controlled second metering pump opens and closes, first pressure-detecting device detects the outlet pressure value of low pressure energy storage device, and the motor that the control signal of output is controlled first metering pump opens and closes.
The present invention compares the beneficial effect that has with background technique: adopt switch valve control, can improve system speed of response and as long as the input signal that inputs to amplifier by control can realize valve timing, open the whole process control of a series of valve parameters such as duration.Compare with adopting proportional pressure-reducing valve, adopt switch valve can reduce electromagnetic push, thereby can reduce input current, improve the speed of response of solenoid valve; Simultaneously, adopt switch valve can realize zero lap or negative opening, have only a control limit in the course of the work in work, therefore do not have additional energy loss thereby make.The opening and closing of valve provide pressure and flow by the high low pressure energy storage device, have only when the outlet pressure value of high low pressure energy storage device is lower than the setting value of pressure-detecting device, by oil hydraulic pump to its repairing, motor stall under nominal situation like this, provide energy by energy storage device, so just greatly reduce the energy consumption of system.
Description of drawings
Fig. 1 is the present invention program's 2 structure principle charts.
Among the figure: 1, metering pump, 2, one-way valve, 3, safety valve, 4, metering pump, 5, one-way valve, 6, safety valve, 7, the high-voltage energy storage device, 8, pressure-detecting device, 9, high-speed switch valve, 10, hydraulic actuator, 11, the low pressure energy storage device, 12, pressure-detecting device, 13, valve.
Embodiment
As shown in drawings, a kind of energy-saving electric-hydraulic variable-valve control system of the present invention can be realized the recycling of system capacity.This system comprises first metering pump 1, second metering pump 4, high-voltage energy storage device 7, low pressure energy storage device 11, high-speed switch valve 9, hydraulic actuator 10 and valve 13.1 outlet of first metering pump is connected to the inlet of first safety valve 3 and the inlet of first one-way valve 2 simultaneously, first safety valve, 3 outlet connected tanks, the right chamber of the inlet while of second metering pump 4 with the oil hydraulic cylinder of the outlet of second safety valve 6, low pressure energy storage device 11, first pressure-detecting device, 12 inlets and hydraulic actuator 10 links to each other, and the outlet of second metering pump 4 then links to each other with the inlet of second one-way valve 5.7 outlets of high-voltage energy storage device link to each other with the pressure port and second pressure-detecting device, 8 inlets of second safety valve, 6 inlets, high-speed switch valve 9 simultaneously, the left chamber of the oil hydraulic cylinder in the hydraulic actuator 10 links to each other with the control mouth of high-speed switch valve 9, and the return opening of high-speed switch valve 9 links to each other with fuel tank.
Second pressure-detecting device 8 detects the outlet pressure value of high-voltage energy storage device 7, the motor that the control signal of output is controlled second metering pump 4 opens and closes, first pressure-detecting device 12 detects the outlet pressure value of low pressure energy storage device 11, and the motor that the control signal of output is controlled first metering pump 1 opens and closes.The outlet of second one-way valve 5, the inlet of second safety valve 6,7 outlets of high-voltage energy storage device, the pressure port of the inlet of second pressure-detecting device 8 and high-speed switch valve 9 forms a pressure chamber and is called the P chamber, the control mouth of high-speed switch valve 9 and the left chamber of the oil hydraulic cylinder in the hydraulic actuator 10 form a pressure chamber and are called the A chamber, the right chamber of the oil hydraulic cylinder in the hydraulic actuator 10, the return opening of high-speed switch valve 9, the inlet of low pressure energy storage device 11, the inlet of first pressure-detecting device 12, the outlet of second safety valve 6, the inlet of second metering pump 4 and first one-way valve 2 go out interruption-forming one pressure chamber, be called the T chamber.
When giving the amplifier input control order, amplifier will be imported certain electric current, to produce electromagnetic force and drive spool this moment, this moment, valve port was opened, switch valve is in right position function (second oil circuit), the P chamber communicates with the A chamber, to enter the left chamber of the oil hydraulic cylinder in the hydraulic actuator 10 by the pressure oil of high-voltage energy storage device output, because piston two cavity areas of the oil hydraulic cylinder in the hydraulic actuator 10 do not wait, therefore valve moves right unlatching under the driving of pressure reduction, and the pressure oil in the right chamber of the oil hydraulic cylinder in the hydraulic actuator 10 will fill in the low pressure energy storage device 11.When in the raw, the output current of amplifier is zero, at this moment electromagnetic force is zero, at this moment solenoid valve will be in position, left side function (first oil circuit), this moment, the A chamber communicated with the T chamber, the oil hydraulic cylinder of hydraulic actuator 10 will be in differential oil line, provide pressure oil by low pressure energy storage device 11, the delivery pressure of low pressure energy storage device 11 will enter the left chamber and the right chamber of the oil hydraulic cylinder in the hydraulic actuator 10, by low pressure energy storage device 11 valve is closed to left movement, and the pressure oil in chamber, a hydraulic actuator left side is with oil sump tank.
Second pressure-detecting device 8 and first pressure-detecting device 12 detect the outlet pressure of high-voltage energy storage device 7 and low pressure energy storage device 11 respectively, when force value that the outlet pressure value of energy storage device is set less than pressure-detecting device, with corresponding starting electrical machinery, thereby primer pump is the energy storage device repairing, can greatly reduce the energy consumption of system like this.
High and low pressure energy storage device can be realized with accumulator; Pressure-detecting device available pressure sensor or pressure relay are realized.
Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (1)
1, a kind of energy-saving electric-hydraulic variable-valve control system, it is characterized in that: first metering pump (1) outlet links to each other with the inlet of first safety valve (3) and the inlet of first one-way valve (2) simultaneously, first safety valve (3) outlet connected tank, the right chamber of the inlet while of second metering pump (4) with the oil hydraulic cylinder of outlet, low pressure energy storage device (11), first pressure-detecting device (12) inlet and the hydraulic actuator (10) of the outlet of first one-way valve (2), second safety valve (6) links to each other; The outlet of second metering pump (4) links to each other with the inlet of second one-way valve (5); High-voltage energy storage device (7) outlet enters the mouth with outlet, second safety valve (6) of second one-way valve (5) simultaneously, the pressure port of high-speed switch valve (9) links to each other with second pressure-detecting device (8) inlet opening; The left chamber of the oil hydraulic cylinder of hydraulic actuator (10) links to each other with the control mouth of high-speed switch valve (9); The oil recirculating port connecting tank of high-speed switch valve (9); First pressure-detecting device (12) is electrically connected with the control motor of first metering pump (1); Second pressure-detecting device (8) is electrically connected with the control motor of second metering pump (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710067187.7A CN101012763A (en) | 2007-02-06 | 2007-02-06 | Energy-saving electric-hydraulic variable-valve control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710067187.7A CN101012763A (en) | 2007-02-06 | 2007-02-06 | Energy-saving electric-hydraulic variable-valve control system |
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| CN101012763A true CN101012763A (en) | 2007-08-08 |
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| CN200710067187.7A Pending CN101012763A (en) | 2007-02-06 | 2007-02-06 | Energy-saving electric-hydraulic variable-valve control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305222A (en) * | 2011-08-24 | 2012-01-04 | 天津大学 | Electro-hydraulic variable valve device with energy accumulator buffer function and energy storage method thereof |
| CN104895855A (en) * | 2014-03-03 | 2015-09-09 | 卡特彼勒（青州）有限公司 | Hydraulic system for machine, machine and control method of hydraulic system |
| CN106014522A (en) * | 2015-03-30 | 2016-10-12 | 卡特彼勒公司 | Variable valve actuator |
| CN114165308A (en) * | 2021-12-08 | 2022-03-11 | 北京理工大学 | Electromechanical liquid coupling system for driving cam-free variable valve actuating mechanism |
-
2007
- 2007-02-06 CN CN200710067187.7A patent/CN101012763A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305222A (en) * | 2011-08-24 | 2012-01-04 | 天津大学 | Electro-hydraulic variable valve device with energy accumulator buffer function and energy storage method thereof |
| CN102305222B (en) * | 2011-08-24 | 2014-03-26 | 天津大学 | Electro-hydraulic variable valve device with energy accumulator buffer function and energy storage method thereof |
| CN104895855A (en) * | 2014-03-03 | 2015-09-09 | 卡特彼勒（青州）有限公司 | Hydraulic system for machine, machine and control method of hydraulic system |
| CN104895855B (en) * | 2014-03-03 | 2018-05-01 | 卡特彼勒（青州）有限公司 | For the hydraulic system of machine, machine and hydraulic system control method |
| CN106014522A (en) * | 2015-03-30 | 2016-10-12 | 卡特彼勒公司 | Variable valve actuator |
| CN106014522B (en) * | 2015-03-30 | 2020-01-07 | 卡特彼勒公司 | Variable valve actuator |
| CN114165308A (en) * | 2021-12-08 | 2022-03-11 | 北京理工大学 | Electromechanical liquid coupling system for driving cam-free variable valve actuating mechanism |
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Open date: 20070808 |