CN104677636A - Comprehensive performance test system based on transient characteristics of engine - Google Patents
Comprehensive performance test system based on transient characteristics of engine Download PDFInfo
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- CN104677636A CN104677636A CN201510048047.XA CN201510048047A CN104677636A CN 104677636 A CN104677636 A CN 104677636A CN 201510048047 A CN201510048047 A CN 201510048047A CN 104677636 A CN104677636 A CN 104677636A
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Abstract
The invention discloses an comprehensive performance test system based on the transient characteristics of an engine. The overall performance test system comprises a tested power platform and a tested engine arranged on the tested power platform. The overall performance test system is characterized in that the overall performance test system also comprises a single chip microcomputer (1), a test and control meter (4), a power analysis meter (2), a motor control device (3), an accelerator driving meter (5), a data acquisition meter (7), a torque sensor (6), a signal processing system (8) and an analysis meter (9), wherein the test and control meter (4) and the power analysis meter (2) are connected with the single chip microcomputer (1); the motor control device (3) is connected with the power analysis meter (2); the accelerator driving meter (5) is connected with the test and control meter (4); the data acquisition meter (7) and the torque sensor (6) are connected with the tested engine; the signal processing system (8) is connected with the data acquisition meter (7); the analysis meter (9) is connected with the signal processing system (8); the control meter (4) is also connected with the tested engine; and the torque sensor (6) is connected with the signal processing system (8). According to the overall performance test system, various parameters of the engine under a transient working state can be tested, and the test precision of the engine and system stability can be guaranteed.
Description
Technical field
The present invention relates to a kind of comprehensive performance testing system, specifically refer to a kind of comprehensive performance testing system based on engine transient characteristic.
Background technology
People improve constantly the reliability of automobile, the requirement of the aspect such as security and green, and engine is as the heart component of automobile, its technical merit directly has influence on the performance index such as its dynamic property, economy and discharge, and the frequency of engine breakdown is also the highest.And engine performance test is the Main Means judging condition of the engine quality, be also the important content of automotive check and maintenance job, therefore engine performance measuring is more and more subject to people's attention.Traditional engine performance test macro is mostly test for the performance of engine under a certain specific steady state condition, and automobile in actual motion many places in starting, accelerate and the transient condition such as deceleration, its rotating speed and torque change in time, mixed Daqu and burning etc. constantly change, and cause the index under engine power performance, economic performance and emission behavior and other performance index and usual steady state condition to have very large difference.Therefore providing a kind of can the comprehensive performance testing system of test engine transient response be then the task of top priority.
Summary of the invention
The object of the invention is to overcome the defect that traditional engine performance test macro cannot be tested the performance of engine under transient condition, a kind of comprehensive performance testing system based on engine transient characteristic is provided.
Object of the present invention is achieved through the following technical solutions: a kind of comprehensive performance testing system based on engine transient characteristic, comprise tested power platform, and the tested engine be arranged on tested power platform, also include single-chip microcomputer, the measurement and control instrument be connected with single-chip microcomputer and power analyzer, the accelerator drive instrument be connected with measurement and control instrument, the electric machine controller be connected with power analyzer, the data collecting instrument be connected with tested engine and torque sensor, the signal processing system be connected with data collecting instrument, and the analyser to be connected with signal processing system, described measurement and control instrument is also connected with tested engine, and torque sensor is connected with signal processing system,
Described institute signal processing system is by pre-amplification circuit, the low-pass filter circuit be connected with pre-amplification circuit, the buffer circuit be connected with low-pass filter circuit, the differential transformation circuit be connected with buffer circuit, and form with the A/D change-over circuit that differential transformation circuit is connected with buffer circuit simultaneously.
Described pre-amplification circuit is by triode VT1, triode VT2, field effect transistor Q, negative pole is connected with the base stage of triode VT1, positive pole is as the polar capacitor C1 of system one input end, positive pole is connected with the emitter of triode VT2 after resistance R5, the polar capacitor C3 that negative pole is connected with the base stage of triode VT1 after resistance R2, one end is connected with the emitter of triode VT1, the resistance R3 that the other end is connected with the negative pole of polar capacitor C3, the resistance R6 be in parallel with polar capacitor C3, one end is connected with the grid of field effect transistor Q, the resistance R7 that the other end is connected with the negative pole of polar capacitor C3, one end is connected with the collector of triode VT1, the resistance R1 that the other end is connected with the collector of triode VT2 after resistance R4, positive pole is connected with the collector of triode VT2, the polar capacitor C2 that negative pole is connected with low-pass filter circuit forms, the drain electrode of described field effect transistor Q is all connected with low-pass filter circuit with source electrode, and resistance R1 is connected with the drain electrode of field effect transistor Q with the tie point of resistance R4, and the collector of triode VT1 is connected with the base stage of triode VT2.
Described low-pass filter circuit is connected with the positive pole of amplifier P by amplifier P one end, the resistance R8 that the other end is connected with the negative pole of polar capacitor C2, one end is connected with the negative pole of amplifier P, the resistance R9 of other end ground connection, positive pole is connected with buffer circuit, the polar capacitor C7 that negative pole is connected with the drain electrode of field effect transistor Q after polar capacitor C4, positive pole is connected with the negative pole of amplifier P, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C7, one end is connected with the source electrode of field effect transistor Q, the resistance R10 that the other end is connected with the negative pole of polar capacitor C7, and positive pole is connected with the output stage of amplifier P, the polar capacitor C6 of minus earth forms, the output stage of described amplifier P is also connected with buffering electricity.
Described buffer circuit is by triode VT3, triode VT4, triode VT5, one end is connected with the positive pole of polar capacitor C7, the resistance R11 of other end ground connection after resistance R12, one end is connected with the positive pole of polar capacitor C7, the resistance R13 that the other end is connected with the collector of triode VT3, N pole is connected with the positive pole of polar capacitor C7, the diode D1 that P pole is connected with the collector of triode VT4, positive pole is connected with the P pole of diode D1, the polar capacitor C10 that negative pole is connected with the base stage of triode VT5, one end is connected with the base stage of triode VT5, the resistance R17 that the other end is then connected with differential transformation circuit after resistance R18, one end is connected with the emitter of triode VT5, the resistance R19 of other end ground connection, one end is connected with the emitter of triode VT4, the resistance R16 that the other end is connected with differential transformation circuit, positive pole is connected with the emitter of triode VT3, the polar capacitor C8 that negative pole is connected with the emitter of triode VT4, and form with the polar capacitor C9 that polar capacitor C8 is in parallel, the base stage of described triode VT3 simultaneously with resistance R11 with the tie point of resistance R12 and the output stage of amplifier P is connected, collector is connected with the base stage of triode VT4, emitter is connected with differential transformation circuit, the base stage of triode VT5 is connected with the N pole of diode D1, collector then while be connected with the N pole of diode D1 and A/D change-over circuit.
Described differential transformation circuit comprises conversion chip U, resistance R14, resistance R15, resistance R22, resistance R23, polar capacitor C11, polar capacitor C14, inductance L 1, one end of resistance R14 is connected with the emitter of triode VT3, the other end is connected with the PGND pin of conversion chip U, the positive pole of polar capacitor C11 is connected with resistance R16, negative pole is connected with the ADJ pin of conversion chip U, resistance R15 and polar capacitor C11 is in parallel, one end of inductance L 1 is connected with the ISENSE pin of conversion chip U, the other end is ground connection after resistance R22 and resistance R23 then, the positive pole of polar capacitor C14 is connected with A/D change-over circuit, its negative pole is then connected with the FB pin of conversion chip U, the VIN pin of conversion chip U is connected with resistance R18, PGATE pin is connected with its PGND pin, FB pin is connected with the tie point of resistance R23 with resistance R22, GND pin ground connection, inductance L 1 is connected with A/D change-over circuit with the tie point of resistance R22.
Described A/D change-over circuit is by conversion chip U1, minus earth, and positive pole is in turn through polar capacitor C12 that resistance R21 is connected with the collector of triode VT5 after resistance R20, positive pole is connected with the CONT pin of conversion chip U1, the polar capacitor C13 that negative pole is connected with the tie point of resistance R22 with inductance L 1, N pole is connected with the TR pin of conversion chip U1, the diode D3 that P pole is connected with the positive pole of polar capacitor C14, N pole is connected with the VCC pin of conversion chip U1, the diode D2 that P pole is connected with the RS pin of conversion chip U1, the THR pin of conversion chip U1 is connected with the positive pole of polar capacitor C12, DIS pin is connected with the tie point of resistance R21 with resistance R20, GND pin ground connection, VCC pin connects power supply.
Described conversion chip U is LM3485 type integrated circuit, and conversion chip U1 is NE555 type integrated circuit.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can test the parameters of engine under transient condition.
(2) the present invention is provided with signal processing system, its can to gather come data process, make engine transient Characteristics Detection result more accurately, more stable.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is signal processing system electrical block diagram of the present invention.
Reference numeral name in above accompanying drawing is called:
1-single-chip microcomputer, 2-power analyzer, 3-electric machine controller, 4-measurement and control instrument, 5-accelerator drive instrument, 6-torque sensor, 7-data collecting instrument, 8-signal processing system, 9-analyser, 81-pre-amplification circuit, 82-low-pass filter circuit, 83-buffer circuit, 84-differential transformation circuit, 85-A/D change-over circuit.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes tested power platform, be fixed on the tested engine on tested power platform.In order to carry out integration test to the transient response of tested engine, the present invention also includes single-chip microcomputer 1, the measurement and control instrument 4 be connected with single-chip microcomputer 1 and power analyzer 2, the accelerator drive instrument 5 be connected with measurement and control instrument 4, the electric machine controller 3 be connected with power analyzer 2, the data collecting instrument 7 be connected with tested engine and torque sensor 6, the signal processing system 8 be connected with data collecting instrument 7, and the analyser 9 be connected with signal processing system 8.Described measurement and control instrument 4 is also connected with tested engine, and torque sensor 6 is connected with signal processing system 8.
Wherein, single-chip microcomputer 1 is as control system of the present invention, electric machine controller 3 is for controlling by the start and stop of measured motor, power analyzer 2 is for detecting the output power of tested engine, accelerator drive instrument 5 provides fuel oil for the fuel engines part for tested engine, and is shown by measurement and control instrument 4 and control its fuel oil output quantity.When changing tested engine oil amount, the operating mode of tested engine then changes, at this moment by data collecting instrument 7, the data such as the temperature under tested engine transient operation, pressure are gathered and flow to signal processing system 8, torque sensor 6 then detects the transient torque of tested engine, and detection signal is analyzed by analyser 9 pairs of data-signals after being processed by signal processing system 8 again.
Signal processing system 8 is inventive point of the present invention, as shown in Figure 2, it is by pre-amplification circuit 81, the low-pass filter circuit 82 be connected with pre-amplification circuit 81, the buffer circuit 83 be connected with low-pass filter circuit 82, the differential transformation circuit 84 be connected with buffer circuit 83, and form with the A/D change-over circuit 85 that differential transformation circuit 84 is connected with buffer circuit 83 simultaneously.
Pre-amplification circuit 81 is for amplifying gathering the data-signal come, it is by triode VT1, triode VT2, field effect transistor Q, negative pole is connected with the base stage of triode VT1, positive pole is as the polar capacitor C1 of system one input end, positive pole is connected with the emitter of triode VT2 after resistance R5, the polar capacitor C3 that negative pole is connected with the base stage of triode VT1 after resistance R2, one end is connected with the emitter of triode VT1, the resistance R3 that the other end is connected with the negative pole of polar capacitor C3, the resistance R6 be in parallel with polar capacitor C3, one end is connected with the grid of field effect transistor Q, the resistance R7 that the other end is connected with the negative pole of polar capacitor C3, one end is connected with the collector of triode VT1, the resistance R1 that the other end is connected with the collector of triode VT2 after resistance R4, positive pole is connected with the collector of triode VT2, the polar capacitor C2 that negative pole is connected with low-pass filter circuit 82 forms, the drain electrode of described field effect transistor Q is all connected with low-pass filter circuit 82 with source electrode, and resistance R1 is connected with the drain electrode of field effect transistor Q with the tie point of resistance R4, and the collector of triode VT1 is connected with the base stage of triode VT2.
Because the data-signal collected has a lot of unwanted frequency, low-pass filter circuit 82 then can filter row during unwanted frequency.It is connected with the positive pole of amplifier P by amplifier P one end, the resistance R8 that the other end is connected with the negative pole of polar capacitor C2, one end is connected with the negative pole of amplifier P, the resistance R9 of other end ground connection, positive pole is connected with buffer circuit 83, the polar capacitor C7 that negative pole is connected with the drain electrode of field effect transistor Q after polar capacitor C4, positive pole is connected with the negative pole of amplifier P, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C7, one end is connected with the source electrode of field effect transistor Q, the resistance R10 that the other end is connected with the negative pole of polar capacitor C7, and positive pole is connected with the output stage of amplifier P, the polar capacitor C6 of minus earth forms.The output stage of described amplifier P is also connected with buffering electricity 83, and amplifier P is preferably OPA603 type amplifier.
Buffer circuit 83 is by triode VT3, triode VT4, triode VT5, one end is connected with the positive pole of polar capacitor C7, the resistance R11 of other end ground connection after resistance R12, one end is connected with the positive pole of polar capacitor C7, the resistance R13 that the other end is connected with the collector of triode VT3, N pole is connected with the positive pole of polar capacitor C7, the diode D1 that P pole is connected with the collector of triode VT4, positive pole is connected with the P pole of diode D1, the polar capacitor C10 that negative pole is connected with the base stage of triode VT5, one end is connected with the base stage of triode VT5, the resistance R17 that the other end is then connected with differential transformation circuit 84 after resistance R18, one end is connected with the emitter of triode VT5, the resistance R19 of other end ground connection, one end is connected with the emitter of triode VT4, the resistance R16 that the other end is connected with differential transformation circuit 84, positive pole is connected with the emitter of triode VT3, the polar capacitor C8 that negative pole is connected with the emitter of triode VT4, and form with the polar capacitor C9 that polar capacitor C8 is in parallel, the base stage of described triode VT3 simultaneously with resistance R11 with the tie point of resistance R12 and the output stage of amplifier P is connected, collector is connected with the base stage of triode VT4, emitter is connected with differential transformation circuit 84, the base stage of triode VT5 is connected with the N pole of diode D1, collector then while be connected with the N pole of diode D1 and A/D change-over circuit 85.
Differential transformation circuit 84 comprises conversion chip U, resistance R14, resistance R15, resistance R22, resistance R23, polar capacitor C11, polar capacitor C14, inductance L 1.During connection, one end of resistance R14 is connected with the emitter of triode VT3, the other end is connected with the PGND pin of conversion chip U, the positive pole of polar capacitor C11 is connected with resistance R16, negative pole is connected with the ADJ pin of conversion chip U, resistance R15 and polar capacitor C11 is in parallel, one end of inductance L 1 is connected with the ISENSE pin of conversion chip U, the other end is ground connection after resistance R22 and resistance R23 then, the positive pole of polar capacitor C14 is connected with A/D change-over circuit 85, its negative pole is then connected with the FB pin of conversion chip U, the VIN pin of conversion chip U is connected with resistance R18, PGATE pin is connected with its PGND pin, FB pin is connected with the tie point of resistance R23 with resistance R22, GND pin ground connection, inductance L 1 is connected with A/D change-over circuit 85 with the tie point of resistance R22.Conversion chip U is preferably LM3485 type integrated circuit.
Described A/D change-over circuit 85 is by conversion chip U1, minus earth, and positive pole is in turn through polar capacitor C12 that resistance R21 is connected with the collector of triode VT5 after resistance R20, positive pole is connected with the CONT pin of conversion chip U1, the polar capacitor C13 that negative pole is connected with the tie point of resistance R22 with inductance L 1, N pole is connected with the TR pin of conversion chip U1, the diode D3 that P pole is connected with the positive pole of polar capacitor C14, N pole is connected with the VCC pin of conversion chip U1, the diode D2 that P pole is connected with the RS pin of conversion chip U1, the THR pin of conversion chip U1 is connected with the positive pole of polar capacitor C12, DIS pin is connected with the tie point of resistance R21 with resistance R20, GND pin ground connection, VCC pin connects power supply, its OUT pin together with the collector of triode VT5 as two of system output terminals, and be connected with analyser 9.This conversion chip U1 is NE555 type integrated circuit.
Signal is transferred to analyser 9 again after signal processing system 8 processes, and is analyzed by the transient response of analyser 9 to tested engine, and the result analyzed like this is more accurate.
As mentioned above, just well the present invention can be realized.
Claims (8)
1. the comprehensive performance testing system based on engine transient characteristic, comprise tested power platform, and the tested engine be arranged on tested power platform, it is characterized in that: also include single-chip microcomputer (1), the measurement and control instrument (4) be connected with single-chip microcomputer (1) and power analyzer (2), the accelerator drive instrument (5) be connected with measurement and control instrument (4), the electric machine controller (3) be connected with power analyzer (2), the data collecting instrument (7) be connected with tested engine and torque sensor (6), the signal processing system (8) be connected with data collecting instrument (7), and the analyser (9) to be connected with signal processing system (8), described measurement and control instrument (4) is also connected with tested engine, and torque sensor (6) is connected with signal processing system (8),
Described institute's signal processing system (8) is by pre-amplification circuit (81), the low-pass filter circuit (82) be connected with pre-amplification circuit (81), the buffer circuit (83) be connected with low-pass filter circuit (82), the differential transformation circuit (84) be connected with buffer circuit (83), and form with the A/D change-over circuit (85) that differential transformation circuit (84) is connected with buffer circuit (83) simultaneously.
2. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 1, it is characterized in that: described pre-amplification circuit (81) is by triode VT1, triode VT2, field effect transistor Q, negative pole is connected with the base stage of triode VT1, positive pole is as the polar capacitor C1 of system one input end, positive pole is connected with the emitter of triode VT2 after resistance R5, the polar capacitor C3 that negative pole is connected with the base stage of triode VT1 after resistance R2, one end is connected with the emitter of triode VT1, the resistance R3 that the other end is connected with the negative pole of polar capacitor C3, the resistance R6 be in parallel with polar capacitor C3, one end is connected with the grid of field effect transistor Q, the resistance R7 that the other end is connected with the negative pole of polar capacitor C3, one end is connected with the collector of triode VT1, the resistance R1 that the other end is connected with the collector of triode VT2 after resistance R4, positive pole is connected with the collector of triode VT2, the polar capacitor C2 that negative pole is connected with low-pass filter circuit (82) forms, the drain electrode of described field effect transistor Q is all connected with low-pass filter circuit (82) with source electrode, and resistance R1 is connected with the drain electrode of field effect transistor Q with the tie point of resistance R4, and the collector of triode VT1 is connected with the base stage of triode VT2.
3. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 2, it is characterized in that: described low-pass filter circuit (82) is connected with the positive pole of amplifier P by amplifier P one end, the resistance R8 that the other end is connected with the negative pole of polar capacitor C2, one end is connected with the negative pole of amplifier P, the resistance R9 of other end ground connection, positive pole is connected with buffer circuit (83), the polar capacitor C7 that negative pole is connected with the drain electrode of field effect transistor Q after polar capacitor C4, positive pole is connected with the negative pole of amplifier P, the polar capacitor C5 that negative pole is connected with the negative pole of polar capacitor C7, one end is connected with the source electrode of field effect transistor Q, the resistance R10 that the other end is connected with the negative pole of polar capacitor C7, and positive pole is connected with the output stage of amplifier P, the polar capacitor C6 of minus earth forms, the output stage of described amplifier P is also connected with buffering electricity (83).
4. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 3, it is characterized in that: described buffer circuit (83) is by triode VT3, triode VT4, triode VT5, one end is connected with the positive pole of polar capacitor C7, the resistance R11 of other end ground connection after resistance R12, one end is connected with the positive pole of polar capacitor C7, the resistance R13 that the other end is connected with the collector of triode VT3, N pole is connected with the positive pole of polar capacitor C7, the diode D1 that P pole is connected with the collector of triode VT4, positive pole is connected with the P pole of diode D1, the polar capacitor C10 that negative pole is connected with the base stage of triode VT5, one end is connected with the base stage of triode VT5, the resistance R17 that the other end is then connected with differential transformation circuit (84) after resistance R18, one end is connected with the emitter of triode VT5, the resistance R19 of other end ground connection, one end is connected with the emitter of triode VT4, the resistance R16 that the other end is connected with differential transformation circuit (84), positive pole is connected with the emitter of triode VT3, the polar capacitor C8 that negative pole is connected with the emitter of triode VT4, and form with the polar capacitor C9 that polar capacitor C8 is in parallel, the base stage of described triode VT3 simultaneously with resistance R11 with the tie point of resistance R12 and the output stage of amplifier P is connected, collector is connected with the base stage of triode VT4, emitter is connected with differential transformation circuit (84), the base stage of triode VT5 is connected with the N pole of diode D1, collector then while be connected with the N pole of diode D1 and A/D change-over circuit (85).
5. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 4, is characterized in that: described differential transformation circuit (84) comprises conversion chip U, resistance R14, resistance R15, resistance R22, resistance R23, polar capacitor C11, polar capacitor C14, inductance L 1, one end of resistance R14 is connected with the emitter of triode VT3, the other end is connected with the PGND pin of conversion chip U, the positive pole of polar capacitor C11 is connected with resistance R16, negative pole is connected with the ADJ pin of conversion chip U, resistance R15 and polar capacitor C11 is in parallel, one end of inductance L 1 is connected with the ISENSE pin of conversion chip U, the other end is ground connection after resistance R22 and resistance R23 then, the positive pole of polar capacitor C14 is connected with A/D change-over circuit (85), its negative pole is then connected with the FB pin of conversion chip U, the VIN pin of conversion chip U is connected with resistance R18, PGATE pin is connected with its PGND pin, FB pin is connected with the tie point of resistance R23 with resistance R22, GND pin ground connection, inductance L 1 is connected with A/D change-over circuit (85) with the tie point of resistance R22.
6. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 5, it is characterized in that: described A/D change-over circuit (85) is by conversion chip U1, minus earth, and positive pole is in turn through polar capacitor C12 that resistance R21 is connected with the collector of triode VT5 after resistance R20, positive pole is connected with the CONT pin of conversion chip U1, the polar capacitor C13 that negative pole is connected with the tie point of resistance R22 with inductance L 1, N pole is connected with the TR pin of conversion chip U1, the diode D3 that P pole is connected with the positive pole of polar capacitor C14, N pole is connected with the VCC pin of conversion chip U1, the diode D2 that P pole is connected with the RS pin of conversion chip U1, the THR pin of conversion chip U1 is connected with the positive pole of polar capacitor C12, DIS pin is connected with the tie point of resistance R21 with resistance R20, GND pin ground connection, VCC pin connects power supply.
7. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 5 or 6, is characterized in that: described conversion chip U is LM3485 type integrated circuit.
8. a kind of comprehensive performance testing system based on engine transient characteristic according to claim 6, is characterized in that: described conversion chip U1 is NE555 type integrated circuit.
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Application publication date: 20150603 |