CN2674420Y - Monitor for on-vehicle engine power - Google Patents
Monitor for on-vehicle engine power Download PDFInfo
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- CN2674420Y CN2674420Y CN 200420015772 CN200420015772U CN2674420Y CN 2674420 Y CN2674420 Y CN 2674420Y CN 200420015772 CN200420015772 CN 200420015772 CN 200420015772 U CN200420015772 U CN 200420015772U CN 2674420 Y CN2674420 Y CN 2674420Y
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Abstract
The utility model provides a monitor for an on-vehicle engine power, belonging to the technical field of engine condition control. The technical problem to be solved is to provide a monitoring device which can calculate the actual power of the engine to reflect the integral loss degree of the engine by analyzing the desired time of lifting the speed of the engine. The utility model has the technical proposal that the on-vehicle engine power comprises a speed sensor, a computer processing circuit, a signal acquisition process circuit. The output end of the speed sensor is connected with the signal acquisition process circuit. The output end of the signal acquisition process circuit is connected with the computer processing circuit. The utility model adopts the NS pole acquisition with high acquisition precision and the process circuit, the required lime delta T can be analyzed when the speed of the engine is lifted to the another speed. The actual power of the engine at this time, can be calculated according to the power operational formula N=K/ delta T (the power constant K is the experimental standard value of the engine), compared the actual power of the engine with the rated power, the power consumption degree of the engine can be analyzed.
Description
Technical field
The utility model relates to a kind of on-board engine power monitoring device, belongs to engine operating condition control technology field.
Background technology
At present, the engine performance pick-up unit is a lot, mainly be to judge engine performance by detection of engine Key Performance Indicator (as port timing, fuel feeding/ignition advance angle, fuel feeding angular interval, fuel feeding uniformity coefficient, engine air leak amount etc.), make this class device need the big quantity sensor of optional equipment, increase cost undoubtedly, reduced global reliability.Belong to having of this class device: China Patent No. 94119157.5 disclosed multifunction detector for running-state motor, it is by clamp pressure sensor on the diesel engine high-pressure oil pipe, detects indexs such as fuel supply advance angle, fuel feeding angular interval, fuel feeding even amount in the mode of photoelectric sensor being installed above the flywheel, subsides scale coding is with on flywheel.The extra sensor that increases of this device is more, need dismantle engine when pasting scale coding band on flywheel, and this device application only limits to diesel engine.China Patent No. 90215162.2 disclosed motor car engine micro computer pick-up units, it is by high-voltage signal and a cylinder ignition signal collection sensor and ignition distributor signals collecting sensor are installed on petrol engine, measure each cylinder working consistance of contact breaker gap, platinum performance, the ignition distributor driving cam degree of wear and engine of engine ignition system, its measurement project is more, but the extra sensor of installing is also more, and detected object is only limited to gasoline engine.Though above several device has all carried out check and analysis to the several Key Performance Indicators of engine, but all can not directly effectively reflect the power of engine, in addition, above-mentioned detecting instrument major part is independent detecting instrument, can not install with car, can only adopt the mode of regular detection, this not only causes and detects surplus, and trouble saving takes place fully.
In order to address the above problem, the technician is newly developed can to install, not influence the engine performance monitoring device of machine work with car, this monitoring device is judged each cylinder work done consistance of engine and engine overall losses degree to the amplitude that rotating speed promotes when analyzing each cylinder work done of engine, thus the serviceability of reflection engine.Though this monitoring has had very big progress technically, use also very convenient, but the situation of respective change takes place in the power that can't directly comprehensively react engine effectively along with the accumulation of working time, with this power rating that comes detection of engine power at any time and reflect engine.The respective change monitoring device takes place in the power that therefore presses for a kind of like this detection of engine in real work along with the working time, so that make managerial personnel and driver can be well understood to the operating position of machine.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of real power that calculates engine when analyzing engine speed and promote the required time, by comparing, can accurately, comprehensively reflect the monitoring device of engine overall losses degree with rating of engine.
The technical scheme of technical problem to be solved in the utility model is:
A kind of on-board engine power monitoring device, it has magnetoelectric tachometric transducer, computer processing circuit, display alarm part and keyboard circuit, computer processing circuit is made up of single-chip microcomputer, code translator, address latch, program storage, data-carrier store etc., the display alarm part is connected with computer processing circuit respectively with keyboard circuit, it also has signal acquisition processing circuit, the output termination signal acquisition processing circuit of speed probe, the output termination computer processing circuit of signal acquisition processing circuit;
Signal acquisition processing circuit is made up of operational amplifier IC41, resistance R 41, R42, R43, R44, diode D41, resistance R 41 and R43 series connection are between power supply and ground, its contact is connected on the in-phase end of operational amplifier IC41, resistance R 44 is connected on+5V power supply and operational amplifier IC41 output terminal between, the speed probe output voltage signal connects the end of oppisite phase of operational amplifier IC41 by resistance R 42, diode D41 is connected between IC41 end of oppisite phase and the ground, the input end of the output termination computer processing circuit of operational amplifier IC41.
The single-chip microcomputer of the computer processing circuit of above-mentioned on-board engine power monitoring device adopts 80C196 type cpu chip, the HIS.0 mouth of the output termination 80C196 chip of operational amplifier IC41.
The signal acquisition processing circuit of above-mentioned on-board engine power monitoring device is made up of sample circuit, pulse generating circuit, coupled circuit, frequency division widening circuit;
Sample circuit is made up of operational amplifier IC41, resistance R 41, R42, R43, R44, diode D41, resistance R 41 and R43 series connection are between power supply and ground, its contact is connected on the in-phase end of operational amplifier IC41, resistance R 44 is connected on+5V power supply and operational amplifier IC41 output terminal between, the speed probe output voltage signal connects the end of oppisite phase of operational amplifier IC41 by resistance R 42, diode D41 is connected between IC41 end of oppisite phase and the ground, the input end of the output termination computer processing circuit of operational amplifier IC41;
Pulse generating circuit is made up of crystal oscillator Z41, resistance R 45, R46, capacitor C 41 and two inputs, four Sheffer stroke gate IC42, the two ends of crystal oscillator connect the contact and 9 of 1,2 pin of IC42, the contact of 10 pin respectively, resistance R 45, R46 are connected on respectively between 1,3 pin and 4,9 pin of IC42, capacitor C 41 is connected between the contact of 3 pin and 4,5 pin of IC42, and 8 pin of IC42 are the output terminal of pulse generating circuit;
Coupled circuit is one group of Sheffer stroke gate input end and the output terminal of two inputs, four Sheffer stroke gate IC42, be 11,12,13 pin of IC42, the output terminal of sample circuit and pulse generating circuit output terminal are received 12,13 pin of IC42 respectively, and 11 pin of IC42 are output termination frequency division widening circuits;
The frequency division widening circuit is by two monostalbe trigger IC43, can preset 16 several system bi-directional counter IC44, resistance R 47, R48, capacitor C 42, C43 forms, IC43 adopts 74123 chips, IC44 adopts 74193 chips, 1～4 pin of 74123 chips, 13～15 pin and R47, C42 constitutes first group of monostable trigger, 5～7,9～12 pin, R48, C43 constitutes another group monostable trigger, 1 pin of first group of monostable trigger of coupled circuit output termination 74123 chips, they are 2 years old, 3 pin connect high level, 4 pin are output, be connected to 5 pin of 74193 chips, the 12 pin output of 74193 chips is connected to 9 pin of 74123 chips again, 12 pin of 74123 chips are connected to the T2CLK pin of CPU, resistance R 47 is connected between 15 pin of Vcc and 74123 chips, capacitor C 42 is connected between 15 pin and 14 pin, 14 pin ground connection, 1 of 74193 chips, 9,10,13,15 pin are unsettled, 5,11 pin connect high level, 7,6,2,3 pin connect P0.3～P0.0 interface of CPU respectively, 14 pin of 74193 chips are connected to the P1.5 interface of CPU, and the peripheral connection principle of another group monostable trigger of 74123 chips is with first group.
The utility model adopts the very high ns level of acquisition precision to gather and treatment circuit, can identify the speed discrepancy distance of each between cog of engine flywheel, by analyzing engine required time Δ T when a certain rotating speed is promoted to another rotating speed, calculate the real power of engine this moment according to Power arithmetic formula N=K/ Δ T, (power constant K be by under specific operation, test on the engine that newly dispatches from the factory in a large amount of same vehicles a standard value) real power of engine is compared with rated power, analyze the power attenuation degree of engine, this product can be installed monitoring or use separately with car, can not stop at machinery, do not disintegrate, do not influence monitoring in real time under the situation of operate as normal, when the power attenuation of engine exceeds standard, will report to the police, prevent to form the hidden danger of significant trouble accident to the driver.This product is quick on the draw, the control accuracy height, antijamming capability is strong and volume is less.
Description of drawings
Fig. 1 is a block scheme of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is an another kind of signal acquisition processing circuit schematic diagram of the present utility model;
Fig. 4 is the automatic deceleration synoptic diagram of machinery.
Embodiment
The utility model is a kind of on-board engine power monitoring device, and its Power arithmetic theory is according to formula:
N
E=K/ Δ T (N
EThe rated power of-engine; The power constant of K-engine: the Δ T-mistiming)
The rated power N of engine
EBe a definite value, Δ T refer to excavator slow down automatically remove moments two rotating speed mistiming.The automatic deceleration of excavator shown in Figure 4 refers to when machine wait work, if all control levers are all at neutral position 1, engine is when turning round on deceleration speed (about 1400rpm), and engine speed drops to immediately and is lower than the about 100rpm of setting speed, reaches the 1-1 decelerate position.If spent for 4 seconds again, engine speed then drops to 2-2 decelerate position (about 1400rpm), and remain on this speed until the arbitrary control lever 2 of operation, engine speed is elevated to the speed that is set by the fuel oil console panel immediately, because it is to raise speed by pump controller control step motor that the rotating speed of engine promotes, when rising to the rotating speed that the fuel oil console panel sets, the rotating speed during therefore from the 2-2 decelerate position of engine only uses time less than 1 second, this operating mode be one than standard, repeatability is tested operating mode preferably, is better than the operating mode of the artificial pulling throttle of common zero load measurement of power.By doing a large amount of experiments on the machine that newly dispatches from the factory in same vehicle, obtain the mean value of Δ T, because rating of engine is a definite value, can obtain the power constant K value of each engine, the power constant K value of various vehicles is imported in the storer of computing machine, and computing machine just can be according to the real power constant K like this
Real, two rotating speed real times differences Δ T
Real, calculate real power N
RealJust can draw the extent of deterioration of the power of engine from the ratio of real power and rated power.
The utility model basic circuit is made up of signal acquisition processing circuit 1, computer processing circuit 2, display alarm part 3 and keyboard circuit 4.Computer processing circuit 2 comprises single-chip microcomputer, code translator, address latch, program storage, data-carrier store.Display alarm part 3 is connected with computer processing circuit 2 respectively with keyboard circuit 4, the output termination computer processing circuit 2 of signal acquisition processing circuit 1.
IC31 in the computer processing circuit 2 that shows among Fig. 2 is CPU, adopts the 80C196 chip.IC33 is an address latch, is the 74HC573 chip, and its effect is to produce independently that address signal uses for program storage.IC34 is a program storage, be 2764 chips, be used for storage computation machine program some during with computational constant and program run according to, parameter (as the power constant K value in the rating formula of engine, different engine, the different rotating speeds amplitude range, and the rated power N of various model engines
EValue etc.) all be stored in wherein.IC35 is a data-carrier store, is the EEPROM28256 chip, intermediate data when moving in order to stored programme and result data.IC32 is a code translator, is the 74LS138 chip, is used for the selection signal of generating routine storer 2764, data-carrier store 28256 and display alarm part.Above integrated circuit constitutes a complete work system with CPU.
The signal acquisition processing circuit 1 that Fig. 2 shows specifically is made up of operational amplifier IC41, resistance R 41～R44, diode D41.R41 and R43 string are between power supply and ground, for operational amplifier IC41 provides benchmark voltage; R44 is connected on+5V power supply and IC41 output terminal between, in order to draw in the output with IC41.The end of oppisite phase of IC41 switches through the speed sensors output voltage signal, and resistance R 42 is connected between input signal and the IC41 end of oppisite phase, prevent input voltage be lower than-during 0.7V, it is excessive and damage speed probe to flow to the electric current of input end by ground warp diode D41.Diode D41 is connected between IC41 end of oppisite phase and the ground, prevents that input end from exporting the brownout of IC41 end of oppisite phase to.
Shown in Figure 3 is another kind of signal acquisition processing circuit, and it is made up of sample circuit, pulse generating circuit, coupled circuit, road, frequency division widening circuit.Sample circuit is converted to square-wave signal in order to the induction electromotive force with speed probe output, pulse generating circuit is in order to produce high-frequency impulse, coupled circuit is in order to be coupled the square-wave signal of sample circuit output and the high-frequency impulse of pulse generating circuit output, to improve counting precision, the frequency division widening circuit is the transition circuit between high-frequency coupling signal and the CPU, in order to indirect raising cpu performance, improve the ratio of performance to price of this device.
The sample circuit of signal acquisition processing circuit is identical with signal acquisition processing circuit shown in Figure 21, repeats no more.
Sort signal acquisition process circuit adopts the reason of pulse generating circuit to be, when rotating speed changes in very little scope, the variation range of time is also very little, so need accurately count out the pulsewidth of speed probe induced signal, therefore by adopting the high-frequency impulse that in tach signal, is coupled, the pulsewidth of coming the metering rotating speed signal by the mode of meter high-frequency impulse number.Crystal oscillator Z41, resistance R 45, R46, capacitor C 41 and two inputs, four Sheffer stroke gate IC42 form high-frequency impulse generation circuit, IC42 provides reverser for pulse generating circuit, by comparator output terminal and pulse generating circuit output terminal being received one group of Sheffer stroke gate input end (IC42 the 12nd pin and the 13rd pin) of IC42 respectively, make high-frequency impulse that the tach signal handled through sample circuit IC41 and pulse generating circuit produce with non-, realize that signal is coupled.Moreover, the cpu chip 80C196 that adopts because of present embodiment supports that dominant frequency is not very high, as system's 18Mhz crystal oscillator, then also can only count the 4.5Mhz pulse under its fastest count rate, for improving counting precision, need to improve pulsed frequency frequently,, present the mode that CPU is exported in employing after with high-frequency impulse frequency division broadening again for remedying the slow-footed defective of CPU.
The frequency division widening circuit is made up of IC43 and IC44, and IC43 now adopts 74123 chips, is a two monostalbe trigger, and IC44 now adopts 74193 chips, is one and can presets 16 several system bi-directional counters.As shown in circuit, what coupled signal exported 74193 chips to behind one group of monostalbe trigger of 74123 chips upwards counts 5 pin, 74193 chip counter are exported another group monostalbe trigger of 12 pin to 74123 chips, export the T2CLK pin that is connected to CPU after for the second time monostable.For 74123 chips, three input pins (1,2,3) of first group of monostalbe trigger, 2,3 pin all connect high level, 1 pin connects the high-frequency coupling signal, negative edge by coupled signal triggers monostalbe trigger, resistance R 47 is connected between Vcc and 15 pin, electric capacity R42 is connected between 15 pin and 14 pin, 14 pin ground connection, resistance R 47 with determined first group of monostalbe trigger output pulse width being connected of electric capacity R42, to such an extent as to prevented burst pulse output 74193 die response not, and miscount taken place.First group of monostable of 74123 chips touched the attitude device and exported 74193 to by pin 4 and have and upwards count input pin 5, the downward tally function of 74193 chips is not used, so downward count pulse input pin 4 connects a constant level, connects height in this circuit all the time, it is unsettled to count output pin 13 downwards.Do not preset several functions because of using,, preset number and import gate pin 11 and connect high level so it is unsettled to preset several input pin 15,1,10,9.Upwards counting output pin 12 output pulse frequencies is 1/16 of incoming frequency, and the number of counting less than 16 meets P0.3～P0.0 that the output of binary-coded decimal form meets CPU respectively by pin 7,6,2,3.74193 chip counter results empty the P1.5 pin that pin 14 is connected to CPU, make to have counted to empty counting output after the pulsewidth, to prepare next counting.Because of 74193 chip counter pulse output pins 12 output pulse widths equal input pulse width, do not respond burst pulse for preventing CPU, so again through one group of monostalbe trigger rear through exporting CPU to.The peripheral connection principle of second group of monostalbe trigger of 74123 chips repeats no more with first group.
The above pulse frequency division widening circuit of narrating is a kind ofly to remedy measure what CPU supported that the not high situation of dominant frequency adopts, and as adopting high-performance, supporting the higher CPU of dominant frequency, then the frequency division widening circuit can save.
The coupling consequential signal exports CPU to by IC42 the 11st pin, and CPU now adopts the 80C196 chip, and its T2CLK pin connects the input of coupling consequential signal, and the sample circuit output signal is connected to the 80C196 I/O port, and this example is received the P1.4 interface.When the sample circuit output voltage is high level, the HFS of corresponding coupling consequential signal, then CPU by the high-frequency impulse counting of 2 pairs of T2CLK pin inputs of timer internal, can obtain the pulsewidth of sample circuit output signal high level part when to detect P1.4 interface input signal be high.Engine speed is promoted used time Δ T substitution formula: N
Real=K/ Δ T
RealCarry out computing and just can obtain the real power of engine.When the ratio of engine real power and rated power reaches regulation numerical value, then report to the police to the driver, and the detection calculations result is exported on display by display.
Shown in accompanying drawing 2: keyboard circuit 4 is made up of K switch 31～K34, resistance R 35～R38.K switch 31～K34 is being connected on respectively between CPU I/O port P1.0～P1.3 and the ground, resistance R 35～R38 lay respectively at K switch 31～K34 and+the 5V power supply between.Four switches are realized " upwards page turning ", " page turning downwards ", " menu ", " affirmation " function respectively.
Claims (4)
1. on-board engine power monitoring device, it comprises magnetoelectric tachometric transducer, computer processing circuit [2], display alarm part [3] and keyboard circuit [4], computer processing circuit [2] is by single-chip microcomputer, code translator, address latch, program storage, compositions such as data-carrier store, display alarm part [3] is connected with computer processing circuit [2] respectively with keyboard circuit [4], it is characterized in that: it also has signal acquisition processing circuit [1], the output termination signal acquisition processing circuit [1] of speed probe, the output termination computer processing circuit [2] of signal acquisition processing circuit [1];
Signal acquisition processing circuit [1] is made up of operational amplifier IC41, resistance R 41, R42, R43, R44, diode D41, resistance R 41 and R43 series connection are between power supply and ground, its contact is connected on the in-phase end of operational amplifier IC41, resistance R 44 is connected on+5V power supply and operational amplifier IC41 output terminal between, the speed probe output voltage signal connects the end of oppisite phase of operational amplifier IC41 by resistance R 42, diode D41 is connected between IC41 end of oppisite phase and the ground, the input end of the output termination computer processing circuit of operational amplifier IC41.
2. on-board engine power monitoring device according to claim 1 is characterized in that: the single-chip microcomputer of described computer processing circuit [2] adopts 80C196 type cpu chip, the HIS.0 mouth of the output termination 80C196 chip of operational amplifier IC41.
3. on-board engine power monitoring device according to claim 1 is characterized in that: described signal acquisition processing circuit [1] is made up of sample circuit, pulse generating circuit, coupled circuit, frequency division widening circuit;
Sample circuit is made up of operational amplifier IC41, resistance R 41, R42, R43, R44, diode D41, resistance R 41 and R43 series connection are between power supply and ground, its contact is connected on the in-phase end of operational amplifier IC41, resistance R 44 is connected on+5V power supply and operational amplifier IC41 output terminal between, the speed probe output voltage signal connects the end of oppisite phase of operational amplifier IC41 by resistance R 42, diode D41 is connected between IC41 end of oppisite phase and the ground, the input end of the output termination computer processing circuit of operational amplifier IC41;
Pulse generating circuit is made up of crystal oscillator Z41, resistance R 45, R46, capacitor C 41 and two inputs, four Sheffer stroke gate IC42, the two ends of crystal oscillator connect the contact and 9 of 1,2 pin of IC42, the contact of 10 pin respectively, resistance R 45, R46 are connected on respectively between 1,3 pin and 4,9 pin of IC42, capacitor C 41 is connected between the contact of 3 pin and 4,5 pin of IC42, and 8 pin of IC42 are the output terminal of pulse generating circuit;
Coupled circuit is one group of Sheffer stroke gate input end and the output terminal of two inputs, four Sheffer stroke gate IC42, be 11,12,13 pin of IC42, the output terminal of sample circuit and pulse generating circuit output terminal are received 12,13 pin of IC42 respectively, and 11 pin of IC42 are output termination frequency division widening circuits;
The frequency division widening circuit is by two monostalbe trigger IC43, can preset 16 several system bi-directional counter IC44, resistance R 47, R48, capacitor C 42, C43 forms, IC43 adopts 74123 chips, IC44 adopts 74193 chips, 1～4 pin of 74123 chips, 13～15 pin and R47, C42 constitutes first group of monostable trigger, 5～7,9～12 pin, R48, C43 constitutes another group monostable trigger, 1 pin of first group of monostable trigger of coupled circuit output termination 74123 chips, they are 2 years old, 3 pin connect high level, 4 pin are output, be connected to 5 pin of 74193 chips, the 12 pin output of 74193 chips is connected to 9 pin of 74123 chips again, 12 pin of 74123 chips are connected to the T2CLK pin of CPU, resistance R 47 is connected between 15 pin of Vcc and 74123 chips, capacitor C 42 is connected between 15 pin and 14 pin, 14 pin ground connection, 1 of 74193 chips, 9,10,13,15 pin are unsettled, 5,11 pin connect high level, 7,6,2,3 pin connect P0.3～P0.0 interface of CPU respectively, 14 pin of 74193 chips are connected to the P1.5 interface of CPU, and the peripheral connection principle of another group monostable trigger of 74123 chips is with first group.
4. on-board engine power monitoring device according to claim 3 is characterized in that: the P1.4 interface of the 80C196 chip of the output termination computer processing circuit of the operational amplifier IC41 of described sample circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420015772 CN2674420Y (en) | 2004-02-18 | 2004-02-18 | Monitor for on-vehicle engine power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420015772 CN2674420Y (en) | 2004-02-18 | 2004-02-18 | Monitor for on-vehicle engine power |
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| Publication Number | Publication Date |
|---|---|
| CN2674420Y true CN2674420Y (en) | 2005-01-26 |
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| CN 200420015772 Expired - Fee Related CN2674420Y (en) | 2004-02-18 | 2004-02-18 | Monitor for on-vehicle engine power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316236C (en) * | 2005-10-24 | 2007-05-16 | 北京理工大学 | Measuring test table for turbocharger friction power |
| CN102252852A (en) * | 2011-01-26 | 2011-11-23 | 中国人民解放军军事交通学院 | Diesel engine signal acquiring device and combustion quality detecting and no-load power determining methods thereof |
| CN106769069A (en) * | 2016-12-21 | 2017-05-31 | 中国南方航空工业(集团)有限公司 | Turn time qualification rate control method and device more than engine |
-
2004
- 2004-02-18 CN CN 200420015772 patent/CN2674420Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316236C (en) * | 2005-10-24 | 2007-05-16 | 北京理工大学 | Measuring test table for turbocharger friction power |
| CN102252852A (en) * | 2011-01-26 | 2011-11-23 | 中国人民解放军军事交通学院 | Diesel engine signal acquiring device and combustion quality detecting and no-load power determining methods thereof |
| CN106769069A (en) * | 2016-12-21 | 2017-05-31 | 中国南方航空工业(集团)有限公司 | Turn time qualification rate control method and device more than engine |
| CN106769069B (en) * | 2016-12-21 | 2019-05-28 | 中国航发南方工业有限公司 | Turn time qualification rate control method and device more than engine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050126 Termination date: 20130218 |