CN204694473U - A kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller - Google Patents
A kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller Download PDFInfo
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- CN204694473U CN204694473U CN201520303457.XU CN201520303457U CN204694473U CN 204694473 U CN204694473 U CN 204694473U CN 201520303457 U CN201520303457 U CN 201520303457U CN 204694473 U CN204694473 U CN 204694473U
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Abstract
The utility model relates to Diesel Engine Technique Field, is specifically related to a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller, comprises filtering circuit, core control circuit, computer for controlling, power driving circuit, output interface and power circuit.This diesel engine electrohydraulic type variable valve actuator for air experimental system controller achieves variable valve actuator for air operating phase, valve added lift controls and regulates on a large scale, more real simulation mechanism various operating modes on a diesel engine, realize experiment hydraulic fluid temperature to control, experiment collection signal process output function; Its overall system structure and control are all very simple, and control accuracy is higher.
Description
Technical field
The utility model relates to Diesel Engine Technique Field, is specifically related to a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller.
Background technology
Diesel engine is due to its high thermal efficiency, low CO
2the advantages such as discharge, and be widely used in forwarding business.But, because oxides of nitrogen in diesel emissions, particle emission content are high, severe contamination is caused to environment, harm humans healthy, seriously limits the development of diesel engine.The diesel engine " high density low-temperature burning technology " of a new generation, by reasonably controlling the process such as engine charge, oil spout, constructs desirable combustion path, effectively reduces in diesel engine use procedure and produce oxides of nitrogen, particle emission amount.Diesel engine variable valve actuator for air controls the intake process of engine by VVT and lift, is the gordian technique realizing this combustion technology.
At present, when laboratory study diesel engine variable valve actuator for air, usually first simulate the running status at engine in special variable valve actuator for air experimental system under, by the operating characteristic of corresponding acquisition system mechanism for testing.Avoid the hidden danger and fund-related staff's consumption that directly use on a diesel engine and bring, there is test macro easy simultaneously, be convenient to the features such as installation.
But on existing simulated experiment platform, also cannot realize the function such as control, the output of camshaft angular position signal, the output of valve stroke signal of the control to hydraulic fluid temperature, variable valve actuator for air.
Utility model content
The purpose of this utility model is to provide a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller, solves current diesel engine variable valve actuator for air simulation experiment platform and cannot realize control to the control that cannot realize hydraulic fluid temperature, variable valve actuator for air, camshaft angular position signal exports, valve stroke signal exports problem.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller,
Comprise filtering circuit: the temperature sensor signal of the displacement transducer signal of the camshaft utilizing sensor to obtain, hydraulic oil, hydraulic oil pressure force sensor signals are transferred to core circuit after carrying out filtering process by filtering circuit;
Comprise core control circuit: be connected by RS232 order wire with computer for controlling, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter send to computer for controlling by RS232 serial ports;
Comprise computer for controlling: be connected with described core control circuit signal by RS232 serial ports, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter is shown by display module, and by display module input of control commands, computer for controlling export control command to power driving circuit by core control circuit;
Comprise power driving circuit: the control signal according to computer for controlling drives solenoid valve and relay work;
Comprise output interface: be connected to filtering circuit, the control signal of the signal after circuit filtering after filtering and core control circuit is transferred to external acquisition system collection by serial communication;
Comprise power circuit: AC220V is converted to relevant voltage electric current and power to filtering circuit, core control circuit and power driving circuit, to sensor, photoelectric encoder, solenoid valve, and relay is powered.
Further, described solenoid valve and relay comprise: the VVT solenoid valve of control VVT-1 passage, the general solenoid valve of control VVT-2 passage, control VVT-3 passage add electrothermal relay, the chilled water solenoid relay valve of control VVT-4, the proportion magnetic valve 1 of control PWM-1, and the proportion magnetic valve 2 of control PWM-2.
Further, described filtering circuit is made up of digital signal filter circuit and analog signal processing machine filter wave circuit, there are 2 digital signal filter passages, 2 resistance signal treatment channel, 2 voltage signal treatment channel, the digital signal that two photoelectric encoders transmit by described two digital signal filter passages is by after a current-limiting resistance, be linked into voltage comparator to compare with basic voltage, then output signal to described core control circuit, described basic voltage regulates gained by a pot; Described resistance signal treatment channel, connected with sampling resistor by resistance sensor, be converted to voltage signal, described core control circuit is exported to after the filtering of a Π type filtering circuit, described voltage signal treatment channel, after the filtering of a Π type filtering circuit, export to described core control circuit by being exported by voltage signal, described Π type filtering circuit is made up of a resistance and two electric capacity.
Further, described core control circuit comprises communication unit, core microcontroller chip, reset unit and crystal oscillator module, wherein said core control circuit is configured with 4 AD conversion passages, 2 input capture passages, 2 Pulse width modulation module and 4 IO passages, described 4 AD conversion passages are Wei AD_0, AD_1, AD_2, AD_3 and AD_4, described AD_0 is set to TEP_IN, it is temperature signal load module, described AD_1, AD 2 and AD_3 is reserved input channel, described 2 input capture passages are for catching the photoelectric encoder signal of output, described configuration 2 Pulse width modulation module are used for pwm control signal and export, described 4 IO passages are used for output solenoid valve, the control signal of relay, communication unit is connected with core microcontroller chip SPI port, realize the communication function with display module.
Further, described power driving circuit is by 6 photoelectrical couplers, 3 binary channels low limit driving chip, 6 metal oxide semiconductor field effect tubes, 6 schottky diodes and current-limiting resistance are formed by connecting, drive singal transfers to binary channels low limit driving chip after photoelectrical coupler after current-limiting resistance current limliting, the signal that binary channels low limit driving chip exports is after current-limiting resistance, transfer to metal oxide semiconductor field effect tube, solenoid valve or relay are controlled, described schottky diode is connected in reverse parallel between described metal oxide semiconductor field effect tube and respective actuators.
Further, described power circuit comprises 1 AC-DC module, 2 DC-DC unit and 1 voltage follow unit; Wherein said AC-DC module converts AC220V to DC12V, DC24V, and is connected to DC-DC unit, output port, voltage follow unit and power driving circuit by wire; DC12V is converted to 5V and 15V and is conveyed through wire and is connected to core control circuit and power driving circuit by described DC-DC unit; Voltage follow unit output voltage and 5V follow, and DC12V is converted into 5V and exports output port to, for external sensor is powered.
Compared with prior art, the beneficial effects of the utility model are: this diesel engine electrohydraulic type variable valve actuator for air experimental system controller achieves variable valve actuator for air operating phase, valve added lift controls and regulates on a large scale, more real simulation mechanism various operating modes on a diesel engine, realize experiment hydraulic fluid temperature to control, experiment collection signal process output function; Its overall system structure and control are all very simple, and control accuracy is higher.
Accompanying drawing explanation
Fig. 1 is the model experiment system diagram of diesel engine.
In Fig. 1: 1 is mounting bracket, 2 is high-pressure oil pump, and 3 is pressure regulator valve, 4 is frequency-variable controller, 5 is variable-frequency motor, and 6 is shaft coupling, and 7 is camshaft, 8 is variable valve system solenoid valve, 9 is variable valve system, 10 photoelectric encoders, and 11 is displacement transducer, 12 for variable valve system controller be that 13 is constant-temperature oil tank.
Fig. 2 is constant-temperature oil tank schematic diagram in diesel engine model experiment system.
In Fig. 2: 14 is fuel tank, 15 is liquid level gauge, and 16 is NTC thermal resistance temperature sensor, and 17 is well heater, and 18 is oil-out, and 19 is oil return opening, and 20 is chilled water solenoid valve, and 21 is cooling water inlet, and 22 is coolant outlet.
Fig. 3 is the utility model circuit and Control system architecture figure.
Fig. 4 is digital signal filter circuit connection diagram in filtering circuit.
Fig. 5 is analog signal processing machine filter wave circuit connection layout in filtering circuit.
Fig. 6 is power driving circuit connection layout.
Fig. 7 is power circuit connection layout.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 3 shows an embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, composition graphs 1 and Fig. 2 known: a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller,
Comprise filtering circuit: the temperature sensor signal of the displacement transducer signal of the camshaft utilizing sensor to obtain, hydraulic oil, hydraulic oil pressure force sensor signals are transferred to core circuit after carrying out filtering process by filtering circuit;
Comprise core control circuit: be connected by RS232 order wire with computer for controlling, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter send to computer for controlling by RS232 serial ports;
Comprise computer for controlling: be connected with described core control circuit signal by RS232 serial ports, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter is shown by display module, and by display module input of control commands, computer for controlling export control command to power driving circuit by core control circuit;
Comprise power driving circuit: the control signal according to computer for controlling drives solenoid valve and relay work;
Comprise output interface: be connected to filtering circuit, the control signal of the signal after circuit filtering after filtering and core control circuit is transferred to external acquisition system collection by serial communication;
Comprise power circuit: AC220V is converted to relevant voltage electric current and power to filtering circuit, core control circuit and power driving circuit, to sensor, photoelectric encoder, solenoid valve, and relay is powered.
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described solenoid valve and relay comprise: the VVT solenoid valve of control VVT-1 passage, the general solenoid valve of control VVT-2 passage, control VVT-3 passage add electrothermal relay, the chilled water solenoid relay valve of control VVT-4, the proportion magnetic valve 1 of control PWM-1, and the proportion magnetic valve 2 of control PWM-2.
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described filtering circuit is made up of digital signal filter circuit and analog signal processing machine filter wave circuit, there are 2 digital signal filter passages, 2 resistance signal treatment channel, 2 voltage signal treatment channel, the digital signal that two photoelectric encoders transmit by described two digital signal filter passages is by after a current-limiting resistance, be linked into voltage comparator to compare with basic voltage, then described core control circuit is outputed signal to, described basic voltage regulates gained by a pot, described resistance signal treatment channel, connected with sampling resistor by resistance sensor, be converted to voltage signal, described core control circuit is exported to after the filtering of a Π type filtering circuit, described voltage signal treatment channel, after the filtering of a Π type filtering circuit, export to described core control circuit by being exported by voltage signal, described Π type filtering circuit is made up of a resistance and two electric capacity.Basic voltage is produced by pot, and this voltage adjusts size by regulating pot, regulates filter effect; Resistance signal treatment channel, by the resistance sensor one termination 5V power supply of input, the other end is connected with sampling resistor ground connection, remove sampling resistor institute divided voltage signal then through a Π type filtering circuit, after realizing low-pass filtering, after 5.1V voltage stabilizing diode in parallel, input to core control circuit AD passage; 2 voltage signal treatment channel, directly by voltage signal through a Π type filtering circuit, after realizing low-pass filtering, after 5.1V voltage stabilizing diode in parallel, input to core control circuit AD passage.Signal processing module is also configured with two Π type filtering circuits, directly by after external input voltage signal filtering, is exported for acquisition system collection by output port.Described Π type filtering circuit, be made up of 1 resistance and 2 electric capacity being connected in parallel on resistance two ends, filtering signal accesses from one end of resistance, exports after filtering from the other end.
More specifically as shown in Figure 4 and Figure 5, filtering circuit has 2 passage digital filterings, 6 channel analog signal filter functions.Digital signal filter so realizes, photoelectric encoder signal A and U1 chip 3, No. 5 pins of input input, at U1 chip 2, No. 6 pin input voltage signals, this voltage signal produces at W1 (10k Ω) pot No. 2 pins, change voltage swing by regulating W1 pot and regulate filter effect, the signal A produced more afterwards exports U17 chip No. 14 pins to from U1 chip No. 1 pin respectively, and U1 chip No. 7 pins export terminals signal_A_OUT to.The process of photoelectric encoder signal Z and signal category-A are seemingly.Simulating signal filtering so realizes; NTC thermal resistance temperature sensor one termination 5V terminals; another termination TEP_IN terminals; R5 (10k Ω ± 0.1%) sampling resistor of connecting with input end is connected; measure R5 institute component voltage; by the Π type filtering circuit that this voltage signal consists of resistance R2, electric capacity C4, electric capacity C5, output signal termination D1 voltage stabilizing diode (5.1V) is protected, then inputs to U17 chip No. 51 pins.The process of AD_1_IN channel signal is identical with TEP_IN, is all applicable to variable resistance type sensor.AD_2_IN passage is applicable to voltage signal sensor; by the Π type filtering circuit that voltage signal consists of resistance R13, electric capacity C11, electric capacity C12; after output signal termination D3 voltage stabilizing diode (5.1V) is protected, then input to U17 chip No. 53 pins.AD_3_IN passage is identical with AD_2_IN implementation.RC_1_IN input signal is applicable to voltage signal sensor, and by the Π type filtering circuit that the voltage signal of input consists of resistance R17, electric capacity C13, electric capacity C14, filtered voltage signal directly exports RC_1_OUT terminals to.RC_2_IN and RC_1_IN implementation is consistent.Described chip U1 is LM2903.Described photoelectric encoder model is Autonic E40S6-720-3-L-24, and a-signal is often changed the line of production and given birth to 720 pulses, and Z signal is often changed the line of production and given birth to 1 pulse, and attainable angle-measurement accuracy is 0.5 degree.
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described core control circuit comprises communication unit, core microcontroller chip, reset unit and crystal oscillator module, wherein said core control circuit is configured with 4 AD conversion passages, 2 input capture passages, 2 Pulse width modulation module and 4 IO passages, described 4 AD conversion passages are Wei AD_0, AD_1, AD_2, AD_3 and AD_4, described AD_0 is set to TEP_IN, it is temperature signal load module, described AD_1, AD 2 and AD_3 is reserved input channel, described 2 input capture passages are for catching the photoelectric encoder signal of output, described configuration 2 Pulse width modulation module are used for pwm control signal and export, described 4 IO passages are used for output solenoid valve, the control signal of relay, communication unit is connected with core microcontroller chip SPI port, realize the communication function with display module.Described 2 input capture passages output signal with signal processing module passage signal_A, signal_Z respectively and are connected; Described 2 PWM passages are defined as PWM_1, PWM_2 passage respectively, and each passage is connected with corresponding driver module passage; Described 4 outputs are compared passage and are defined as VVT_1, VVT_2, VVT_3, VVT_4 respectively, and each passage is connected with corresponding driver module passage, for exporting actuator control signal; Communication unit is connected with core microcontroller chip SPI port, realizes the communication function with display module.Described crystal oscillator module adopts the active crystal oscillator of 4MHz.
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described display module has RS232 serial communication function and 7 inches of touch display screens.Display module is communicated with core control circuit by RS232 serial communication line.Core control circuit sends the parameters such as camshaft speed, hydraulic fluid temperature, variable valve system solenoid control pulsewidth, start-up time, pwm control signal dutyfactor value in real time to display module, is then shown by touch display screen; User arranges variable valve actuator for air solenoid valve 1 (VVT_1) pulsewidth and start-up time, variable valve actuator for air solenoid valve 2 (VVT_2) pulsewidth and start-up time, the frequency of operation of proportion magnetic valve 1 (PWM_1) and dutycycle, proportion magnetic valve 2 (PWM_2) frequency of operation and dutycycle, hydraulic oil control temperature (T by touch display screen
s), hydraulic oil control temperature tolerance (T
e) etc. parameter, then parameter sends to core control circuit by serial communication.The TFT80480RS070ET liquid crystal display that described display module model is produced for Wuhan Gu Xin Science and Technology Ltd..
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described power driving circuit is by 6 photoelectrical couplers, 3 binary channels low limit driving chip, and 6 metal oxide semiconductor field effect tubes, 6 schottky diodes and current-limiting resistances are formed by connecting.If each passage is defined as PWM_1, PWM_2, VVT_1, VVT_2, VVT_3, VVT_4 respectively.The driving circuit principle figure of each passage is identical, drive singal exports from acp chip, described power driving circuit is by 6 photoelectrical couplers, 3 binary channels low limit driving chip, 6 metal oxide semiconductor field effect tubes, 6 schottky diodes and current-limiting resistance are formed by connecting, drive singal transfers to binary channels low limit driving chip after photoelectrical coupler after current-limiting resistance current limliting, the signal that binary channels low limit driving chip exports is after current-limiting resistance, transfer to metal oxide semiconductor field effect tube, solenoid valve or relay are controlled, described schottky diode is connected in reverse parallel between described metal oxide semiconductor field effect tube and respective actuators.In other words; namely drive singal first realizes the protection to acp chip through photoelectrical coupler chip; through photoelectrical coupler export signal by being transferred to binary channels low limit driving chip after a current-limiting resistance; binary channels low limit drive chip signal output controls metal oxide semiconductor field effect tube after a current-limiting resistance; realize the control to solenoid valve/relay; for protection metal oxide semiconductor field effect tube is by the damage of actuator turn-off transient reverse voltage, realize afterflow protective effect with actuator reverse parallel connection schottky diode.
As shown in Figure 6; the driving circuit principle figure of each passage is identical; drive singal exports from acp chip; first realize the protection to acp chip through opto-coupler chip; through optocoupler export signal by being transferred to low limit driving chip after a current-limiting resistance; low limit drive chip signal output controls field effect transistor after a current-limiting resistance, realizes the control to solenoid valve/relay.Its specific implementation such as VVT_1 drive singal exports U8 opto-coupler chip 2 pin to from core U17 chip, opto-coupler chip U8 output signal meets current-limiting resistance R28 (100 Ω) and inputs U9 low limit driving chip No. 2 pins afterwards, signal exports from No. 7 pins again, inputs field effect transistor Q1 grid afterwards by current-limiting resistance R27 (100 Ω).Field effect transistor source (S) pole connects Power Groud, and leak (D) pole and be connected to SOL_1 terminals, solenoid valve one end is connected to SOL_1, an other termination+12V power supply, clamps press with solenoid valve anti-parallel diodes D11 afterflow.Rest channels is identical with VVT_1 implementation.VVT_1 to VVT_4 channel signal is corresponding respectively to be exported by U17 chip 5 to No. 8 pins.PWM_1, PWM_2 channel signal is corresponding respectively to be produced by U17 chip 1, No. 3 pins.Described chip U17 model MC9S12XS128MAA, U8 chip model is TLP250, U9 chip model be IR4427, field effect transistor Q1 model is BUK7226.
According to another embodiment of a kind of diesel engine electrohydraulic type of the utility model variable valve actuator for air experimental system controller, described power circuit comprises 1 AC-DC module, 2 DC-DC unit and 1 voltage follow unit; Wherein said AC-DC module converts AC220V to DC12V, DC24V, and is connected to DC-DC unit, output port, voltage follow unit and power driving circuit by wire; DC12V is converted to 5V and 15V and is conveyed through wire and is connected to core control circuit and power driving circuit by described DC-DC unit; Voltage follow unit output voltage and 5V follow, and DC12V is converted into 5V and exports output port to, for external sensor is powered, realize probe power and are separated with other modular power sources, realize the protection of other operational modules.
Be the circuit theory diagrams of power circuit DC-DC unit, voltage follow unit as shown in Figure 7, the 12V exported in AC-DC module accesses 1 alminium electrolytic condenser C19 to carry out power filter and inputs to DC-DC module again; DC12V-DC5V unit converts DC12V to 5V by chip U7, alminium electrolytic condenser C26 (25V in parallel between U7 output terminal and negative pole, 330uf) carry out out-put supply filtering, whether also connect access 1 1k Ω current-limiting resistance R26 and 1 light emitting diode D10 between output terminal with negative pole, in order to indicate output voltage normal; DC12V-DC15V unit, be 15V by chip U6 by 12V boost in voltage, this unit comprises an inductance L 1 (100uH), a diode D7, a current-limiting resistance R25 (10k Ω), a pot W3 (10k Ω), finely tunes the size of output voltage by pot W3; Before using, coordinate voltage table by voltage debugging to 15V, between 15V output terminal and negative pole and tantalum electric capacity C22 (25V, 22uf) carry out out-put supply filtering, whether connect access 1 1k Ω current-limiting resistance R23 and 1 light emitting diode D8 between output terminal with negative pole, in order to indicate output voltage normal; Voltage follow unit, by chip U5 DC12V is converted to and follows the identical voltage of voltage and export, following voltage is 5V, between output terminal and negative pole and tantalum electric capacity C23 (10V, 22uf) carry out out-put supply filtering, whether access 1 1k Ω current-limiting resistance R24 and the 1 light emitting diode D9 that connects between output terminal with negative pole is in order to indicate output voltage normal.5V and 15V is transferred to core control circuit and power driver module; Voltage follow unit output voltage and 5V follow, and DC12V are converted into 5V output voltage, are then connected to output port, for external sensor is powered, realize probe power and are separated with other modular power sources, realize the protection of other operational modules.Described chip U5 is TLE4251, U6 be LX6009, U7 is LM1085.
Functional realiey principle of the present utility model is as follows:
Experimental system controller obtains the rotating speed of current camshaft and the position when front cam by photoelectric encoder, core control circuit is sent to by the controling parameters of display module setting variable valve system, the controling parameters of the position display module setting that nucleus module obtains according to photoelectric encoder, control driving circuit in position accurately by circuit ON, drive variable valve system Controlling solenoid valve to open and maintain the duration of setting, realizing the control of variable valve actuator for air; Temperature transition is electric signal by NTC thermal resistance temperature sensor by controller, when hydraulic fluid temperature T is lower than T
s– T
e(T
sdesign temperature, T
etemperature allowance), controller controls heating relay power, and heating tube work, when temperature is higher than T
s– T
etime, heating cut-off, when actual hydraulic pressure oil temperature is higher than design temperature, controller controlled cooling model liquid electromagnetic valve relay power, liquid coolant solenoid valve is opened, and hydraulic fluid temperature is reduced by heat exchanger, when temperature is lower than T by supply chilled water
scontrol Controlling solenoid valve power-off, realize the control of hydraulic fluid temperature; The signal that photoelectric encoder inputs by controller signals processing module is transferred to acp chip and output interface respectively after dual comparator filtering, and Controller gain variations has Π type filtering circuit simultaneously, realizes voltage signal low-pass filtering function.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and layout.Except the distortion carried out building block and/or layout and improving, to those skilled in the art, other purposes also will be obvious.
Claims (6)
1. a diesel engine electrohydraulic type variable valve actuator for air experimental system controller, is characterized in that:
Comprise filtering circuit: the temperature sensor signal of the displacement transducer signal of the camshaft utilizing sensor to obtain, hydraulic oil, hydraulic oil pressure force sensor signals are transferred to core circuit after carrying out filtering process by filtering circuit;
Comprise core control circuit: be connected by RS232 order wire with computer for controlling, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter send to computer for controlling by RS232 serial ports;
Comprise computer for controlling: be connected with described core control circuit signal by RS232 serial ports, camshaft speed, hydraulic fluid temperature, hydraulic fluid pressure and diesel engine working status parameter is shown by display module, and by display module input of control commands, computer for controlling export control command to power driving circuit by core control circuit;
Comprise power driving circuit: the control signal according to computer for controlling drives solenoid valve and relay work;
Comprise output interface: be connected to filtering circuit, the control signal of the signal after circuit filtering after filtering and core control circuit is transferred to external acquisition system collection by serial communication;
Comprise power circuit: AC220V is converted to relevant voltage electric current and power to filtering circuit, core control circuit and power driving circuit, to sensor, photoelectric encoder, solenoid valve, and relay is powered.
2. a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller according to claim 1, it is characterized in that: described solenoid valve and relay comprise: the VVT solenoid valve of control VVT-1 passage, the general solenoid valve of control VVT-2 passage, control VVT-3 passage add electrothermal relay, the chilled water solenoid relay valve of control VVT-4, the proportion magnetic valve 1 of control PWM-1, and the proportion magnetic valve 2 of control PWM-2.
3. a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller according to claim 1 and 2, it is characterized in that: described filtering circuit is made up of digital signal filter circuit and analog signal processing machine filter wave circuit, there are 2 digital signal filter passages, 2 resistance signal treatment channel, 2 voltage signal treatment channel, the digital signal that two photoelectric encoders transmit by described two digital signal filter passages is by after a current-limiting resistance, be linked into voltage comparator to compare with basic voltage, then described core control circuit is outputed signal to, described basic voltage regulates gained by a pot, described resistance signal treatment channel, connected with sampling resistor by resistance sensor, be converted to voltage signal, described core control circuit is exported to after the filtering of a Π type filtering circuit, described voltage signal treatment channel, after the filtering of a Π type filtering circuit, export to described core control circuit by being exported by voltage signal, described Π type filtering circuit is made up of a resistance and two electric capacity.
4. a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller according to claim 1 and 2, it is characterized in that: described core control circuit comprises communication unit, core microcontroller chip, reset unit and crystal oscillator module, wherein said core control circuit is configured with 4 AD conversion passages, 2 input capture passages, 2 Pulse width modulation module and 4 IO passages, described 4 AD conversion passages are Wei AD_0, AD_1, AD_2, AD_3 and AD_4, described AD_0 is set to TEP_IN, it is temperature signal load module, described AD_1, AD 2 and AD_3 is reserved input channel, described 2 input capture passages are for catching the photoelectric encoder signal of output, described configuration 2 Pulse width modulation module are used for pwm control signal and export, described 4 IO passages are used for output solenoid valve, the control signal of relay, communication unit is connected with core microcontroller chip SPI port, realize the communication function with display module.
5. a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller according to claim 1 and 2, it is characterized in that: described power driving circuit is by 6 photoelectrical couplers, 3 binary channels low limit driving chip, 6 metal oxide semiconductor field effect tubes, 6 schottky diodes and current-limiting resistance are formed by connecting, drive singal transfers to binary channels low limit driving chip after photoelectrical coupler after current-limiting resistance current limliting, the signal that binary channels low limit driving chip exports is after current-limiting resistance, transfer to metal oxide semiconductor field effect tube, solenoid valve or relay are controlled, described schottky diode is connected in reverse parallel between described metal oxide semiconductor field effect tube and respective actuators.
6. a kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller according to claim 1 and 2, is characterized in that: described power circuit comprises 1 AC-DC module, 2 DC-DC unit and 1 voltage follow unit; Wherein said AC-DC module converts AC220V to DC12V, DC24V, and is connected to DC-DC unit, output port, voltage follow unit and power driving circuit by wire; DC12V is converted to 5V and 15V and is conveyed through wire and is connected to core control circuit and power driving circuit by described DC-DC unit; Voltage follow unit output voltage and 5V follow, and DC12V is converted into 5V and exports output port to, for external sensor is powered.
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| CN201520303457.XU CN204694473U (en) | 2015-05-12 | 2015-05-12 | A kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller |
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| CN201520303457.XU CN204694473U (en) | 2015-05-12 | 2015-05-12 | A kind of diesel engine electrohydraulic type variable valve actuator for air experimental system controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840686A (en) * | 2017-01-20 | 2017-06-13 | 湖南大学 | The on-line measuring device and detection method of control parameter under a kind of engine variable working condition |
| CN108227596A (en) * | 2018-03-10 | 2018-06-29 | 江苏物润船联网络股份有限公司 | Control and monitoring system for ships and power circuit |
-
2015
- 2015-05-12 CN CN201520303457.XU patent/CN204694473U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840686A (en) * | 2017-01-20 | 2017-06-13 | 湖南大学 | The on-line measuring device and detection method of control parameter under a kind of engine variable working condition |
| CN106840686B (en) * | 2017-01-20 | 2018-10-23 | 湖南大学 | The on-line measuring device and detection method of control parameter under a kind of engine variable working condition |
| CN108227596A (en) * | 2018-03-10 | 2018-06-29 | 江苏物润船联网络股份有限公司 | Control and monitoring system for ships and power circuit |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20151007 Termination date: 20160512 |