CN106226083A - Engine test dynamic analog dynamometer machine and road resistance analogy method thereof - Google Patents
Engine test dynamic analog dynamometer machine and road resistance analogy method thereof Download PDFInfo
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- CN106226083A CN106226083A CN201610665262.9A CN201610665262A CN106226083A CN 106226083 A CN106226083 A CN 106226083A CN 201610665262 A CN201610665262 A CN 201610665262A CN 106226083 A CN106226083 A CN 106226083A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The invention discloses a kind of engine test dynamic analog dynamometer machine, including base and the first inertial flywheel bearings of being fixedly connected on base, second inertial flywheel bearings, first motor bearings supports and the second motor bearings supports, in first inertial flywheel bearings and the second inertial flywheel bearings, flywheel shaft is installed, connect on flywheel shaft and have inertial flywheel, first motor bearings supports and is provided with dynamometer machine motor between the support of the second motor bearings, the two ends output shaft of dynamometer machine motor is separately mounted to the first motor bearings and supports and in the support of the second motor bearings, the end of flywheel shaft connects encoder, the force transducer that moment of torsion is measured it is provided with on the shell of dynamometer machine motor；The invention also discloses the road resistance analogy method of a kind of engine test dynamic analog dynamometer machine.The present invention is reasonable in design, it is achieved convenient and low cost, complete function, functional reliability and stability height, practical, it is simple to promote the use of.
Description
Technical field
The invention belongs to engine test technical field, be specifically related to a kind of engine test dynamic analog dynamometer machine and
Its road resistance analogy method.
Background technology
Dynamometer machine is used to measure the moment of torsion of electromotor, motor etc., the isoparametric a kind of device of rotating speed, is that electromotor leaves
Requisite testing equipment in Faing.Traditional dynamometer machine is used only for carrying out the measurement of the general parameters such as moment of torsion, rotating speed, can only
The parameter of test engine itself.Along with the development of technology and the demand to the shortening construction cycle, need on stand starting
Car load (motorcycle, automobile) performance (speed, acceleration etc.) that machine is to be mated is simulated, due to traditional dynamometer machine without
Method simulates car load inertia on stand exactly, so traditional dynamometer machine cannot meet this requirement.
Summary of the invention
The technical problem to be solved is for above-mentioned deficiency of the prior art, it is provided that a kind of structure letter
Single, reasonable in design, realize convenient and low cost, complete function, functional reliability and stability are high, practical, be easy to promote
The engine test dynamic analog dynamometer machine used.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of engine test dynamic analog is surveyed
Merit machine, it is characterised in that: include that base and the first inertial flywheel bearings, the second inertia that are fixedly connected on base fly
Wheel bearing supports, the first motor bearings supports and the second motor bearings supports, described first inertial flywheel bearings and second
In inertial flywheel bearings, flywheel shaft is installed, is positioned at described first inertial flywheel bearings and the second inertial flywheel bearing
Connecting on one section of flywheel shaft between support and have inertial flywheel, described first motor bearings supports and the second motor bearings supports it
Between be provided with dynamometer machine motor, the two ends output shaft of described dynamometer machine motor be separately mounted to first motor bearings support and second
On motor bearings supports, the described dynamometer machine motor output shaft near described inertial flywheel side passes through flywheel shaft shaft coupling and flies
Wheel shaft connects, and described dynamometer machine motor has dynamometer machine main spindle coupling away from connecting on the output shaft of described inertial flywheel side,
The end of described flywheel shaft connects the encoder for measuring the rotating speed of flywheel shaft, the shell of described dynamometer machine motor
On be provided with that the shell of one end and dynamometer machine motor fixing is connected, the other end is fixed with base and is connected and for dynamometer machine motor
The force transducer that measures of moment of torsion.
Above-mentioned engine test dynamic analog dynamometer machine, it is characterised in that: described inertial flywheel is monoblock type inertia
Flywheel, described monoblock type inertial flywheel includes discoidal integral flywheel body and is arranged on the center of integral flywheel body
Position and for connecting the integral flywheel installing hole of flywheel shaft.
Above-mentioned engine test dynamic analog dynamometer machine, it is characterised in that: described inertial flywheel is flanged type inertia
Flywheel, described flanged type inertial flywheel includes discoidal flanged type flywheel body and is arranged on the center of flanged type flywheel body
Position and for connecting the flanged type flywheel installing hole of flywheel shaft, the side, both sides of described flanged type flywheel body is respectively provided with
There is the loss of weight technology groove of annular.
Above-mentioned engine test dynamic analog dynamometer machine, it is characterised in that: described dynamometer machine motor is frequency control
Alternating current generator.
Above-mentioned engine test dynamic analog dynamometer machine, it is characterised in that: described encoder is optical-electricity encoder.
The invention also discloses that a kind of method step is simple, realize convenient engine test dynamic analog dynamometer machine
Road resistance analogy method, it is characterised in that the method comprises the following steps:
Step one, by peripheral control unit control dynamometer machine motor rotation to the max. speed corresponding to treating simulated target car load
Maximum (top) speed after, peripheral control unit stops being controlled the rotating speed of dynamometer machine motor, makes described dynamic analog dynamometer machine mould
Intend treating that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, encoder the rotating speed of dynamometer machine motor is measured and by measurement to rotating speed be transferred to
Peripheral control unit, peripheral control unit is first according to formulaIt is calculated the rotating speed n that jth time sampling obtainsjRight
Speed v treating simulated target car load answeredj, further according to formula FE,j=a0+b×vj 2It is calculated the car treating simulated target car load
Speed vjCorresponding road resistance FE,j, further according to formulaIt is calculated road resistance FE,jCorresponding electromotor is defeated
Shaft moment of torsion ME,j, then, peripheral control unit is according to road resistance FE,jCorresponding engine output shaft moment of torsion ME,jControl dynamometer machine
The moment of torsion of motor, makes moment of torsion and the road resistance F of dynamometer machine motorE,jCorresponding engine output shaft moment of torsion ME,jEqual；Meanwhile,
The moment of torsion of dynamometer machine motor is measured and measurement moment of torsion is transferred to peripheral control unit by force transducer, and peripheral control unit is to survey
Amount moment of torsion records and stores；Wherein, the value of j is the natural number of 1～n, n be sampling total degree and value be 1～200
Natural number；I is the final drive ratio treating simulated target car load；R be the driving wheel treating simulated target car load rolling radius andDrimFor treating the rim diameter of simulated target car load, Hflat-ratioFor treating simulated target
The aspect ratio of the tire of car load, W is the deflected width of tyre treating simulated target car load；a0For treating that the front-wheel of simulated target car load rolls
Dynamic resistance, b is coefficient of air resistance；
What step 2, peripheral control unit were received treats speed v of simulated target car loadjCorresponding measurement moment of torsion and root
According to formulaCalculated speed v treating simulated target car loadjCorresponding road resistance FE,jCorresponding sends out
Motivation output shaft torque ME,jCompare, when n sample the measurement torque obtained and calculated engine output shaft moment of torsion
When difference is not all in the range of the 2%～10% of calculated engine output shaft moment of torsion, repeated execution of steps three, directly
The measurement torque obtained to n sampling is all defeated at calculated electromotor with calculated engine output shaft torque difference
In the range of the 2%～10% of shaft moment of torsion；
Step 3, by peripheral control unit control dynamometer machine motor rotation to the max. speed corresponding to treating simulated target car load
After corresponding maximum (top) speed, peripheral control unit stops being controlled the rotating speed of dynamometer machine motor, makes described dynamic analog measurement of power
Machine simulation treats that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, encoder the rotating speed of dynamometer machine motor is measured and by measurement to rotating speed be transferred to
Peripheral control unit, peripheral control unit is according to formulaIt is calculated the rotating speed n that jth time sampling obtainsjCorresponding
Speed v treating simulated target car loadj, and inquire about speed v treating simulated target car load being stored thereinjThe corresponding last time
Sliding the measurement moment of torsion in simulation process, peripheral control unit slides the measurement moment of torsion in simulation process according to the last time and controls measurement of power
The moment of torsion of dynamo-electric machine, the moment of torsion making dynamometer machine motor is equal with the measurement moment of torsion that the last time slides in simulation process；Meanwhile, power passes
The moment of torsion of dynamometer machine motor is measured and measurement moment of torsion is transferred to peripheral control unit by sensor, and peripheral control unit is turned round measuring
Square records and stores；
The measurement moment of torsion performing step 3 record and storage for the last time is defined as waiting to simulate by step 4, peripheral control unit
The road resistance that the vehicle of target car load is corresponding；
Step 5, peripheral control unit control dynamometer machine motor according to the road resistance that the vehicle treating simulated target car load is corresponding
Moment of torsion, the road resistance making the moment of torsion of dynamometer machine motor corresponding with the vehicle treating simulated target car load is equal.
Above-mentioned method, it is characterised in that: described peripheral control unit includes what main control computer was connected with main control computer
PLC module and the converter being connected with PLC module.
Above-mentioned method, it is characterised in that: step one and step 3 peripheral controller control dynamometer machine motor rotation and arrive
Corresponding to treating that the detailed process of the maximum (top) speed of the max. speed of simulated target car load is:
Step A, main control computer sets and treats the rim diameter D of simulated target car loadrim, treat simulated target car load
The aspect ratio H of tireflat-ratio, treat the deflected width of tyre W of simulated target car load and treat the final drive of simulated target car load
Compare i；And front-wheel resistance to rolling a of simulated target car load is treated in setting on main control computer0With coefficient of air resistance b；
Step B, main control computer are according to formulaIt is calculated dynamometer machine motor corresponding to waiting to simulate
Max. speed v of target car loadmaxMaximum (top) speed nmax, wherein, i is the final drive ratio treating simulated target car load, for treating mould
The gear ratio of each gear intending target car load is long-pending；R be the driving wheel treating simulated target car load rolling radius and
Dynamometer machine motor is corresponded to treat max. speed v of simulated target car load by step C, main control computermaxMaximum turn
Speed nmaxBeing transferred to PLC module, PLC module is transmitted further to converter, the dynamometer machine motor fortune in transducer drive dynamometer machine motor
Forward the maximum (top) speed of max. speed corresponding to treating simulated target car load to.
The present invention compared with prior art has the advantage that
1, the inventive engine test simple in construction of dynamic analog dynamometer machine, reasonable in design, it is achieved convenient and cost
Low.
2, the use of inventive engine test dynamic analog dynamometer machine is easy to operate.
3, the engine test of present invention dynamic analog dynamometer machine, it is possible to simulate car load on engine pedestal exactly
(motorcycle, automobile) movement inertia, moreover it is possible to realize treating the simulation of road resistance corresponding to the speed of simulated target car load, thus
The vehicle performance of motorcycle, automobile etc., complete function can be simulated exactly on engine pedestal.
4, inventive engine test is high by functional reliability and the stability of dynamic analog dynamometer machine.
5, inventive engine test is simple with the method step of the road resistance analogy method of dynamic analog dynamometer machine, real
Now facilitate.
6, the present invention's is practical, it is simple to promote the use of.
In sum, the present invention's is reasonable in design, it is achieved convenient and low cost, complete function, and functional reliability is with stable
Property high, practical, it is simple to promote the use of.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of engine test dynamic analog dynamometer machine in the embodiment of the present invention 1.
Fig. 2 is the front view of monoblock type inertial flywheel in the embodiment of the present invention 1.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the structural representation of engine test dynamic analog dynamometer machine in the embodiment of the present invention 2.
Fig. 5 is the front view of monoblock type inertial flywheel in the embodiment of the present invention 2.
Fig. 6 is the left view of Fig. 5.
Fig. 7 is the schematic block circuit diagram of peripheral control unit of the present invention.
Description of reference numerals:
1 encoder；2 first inertial flywheel bearings；3 monoblock type inertial flywheels；
3-1 integral flywheel body；3-2 integral flywheel installing hole；4 flywheel shafts；
5 second inertial flywheel bearings；6 flywheel shaft shaft couplings；7 bases；
8 first motor bearings support；9 dynamometer machine motors；10 force transducers；
11 second motor bearings support；12 dynamometer machine main spindle couplings；
13 flanged type inertial flywheels；13-1 flanged type flywheel body；
13-2 flanged type flywheel installing hole；13-3 loss of weight technology groove；
14 peripheral control units；14-1 main control computer；14-2 PLC module；
14-3 converter.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, the engine test of the present embodiment dynamic analog dynamometer machine, including base 7 and
First inertial flywheel bearings the 2, second inertial flywheel bearings the 5, first motor bearings being fixedly connected on base 7 props up
Support 8 and the second motor bearings support 11, and described first inertial flywheel bearings 2 and the second inertial flywheel bearings 5 are pacified
Equipped with flywheel shaft 4, one section between described first inertial flywheel bearings 2 and the second inertial flywheel bearings 5 flies
Connecting on wheel shaft 4 and have inertial flywheel, described first motor bearings support 8 and the second motor bearings support and are provided with measurement of power between 11
Dynamo-electric machine 9, the two ends output shaft of described dynamometer machine motor 9 is separately mounted to the first motor bearings support 8 and the second motor bearings
Supporting on 11, the described dynamometer machine motor 9 output shaft near described inertial flywheel side passes through flywheel shaft shaft coupling 6 and flywheel shaft
4 connect, and described dynamometer machine motor 9 has dynamometer machine main spindle coupling 12 away from connecting on the output shaft of described inertial flywheel side,
The end of described flywheel shaft 4 connects the encoder 1 for measuring the rotating speed of flywheel shaft 4, described dynamometer machine motor 9
It is provided with on shell that the shell of one end and dynamometer machine motor 9 fixing is connected, the other end is fixed with base 7 and is connected and for measurement of power
The force transducer 10 that the moment of torsion of dynamo-electric machine 9 measures.
In the present embodiment, described inertial flywheel is monoblock type inertial flywheel 3, and described monoblock type inertial flywheel 3 includes disk
The integral flywheel body 3-1 of shape and be arranged on the center position of integral flywheel body 3-1 and for connecting flywheel shaft 4
Integral flywheel installing hole 3-2.
In the present embodiment, described dynamometer machine motor 9 is frequency conversion timing AC motor.
In the present embodiment, described encoder 1 is optical-electricity encoder.
The engine test of the present embodiment road resistance analogy method of dynamic analog dynamometer machine, comprises the following steps:
Step one, peripheral control unit 14 control dynamometer machine motor 9 and run to corresponding to treating the highest of simulated target car load
After the maximum (top) speed of speed, peripheral control unit 14 stops being controlled the rotating speed of dynamometer machine motor 9, makes described dynamic analog survey
The simulation of merit machine treats that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, the rotating speed transmission that the rotating speed of dynamometer machine motor 9 is measured and measurement arrived by encoder 1
To peripheral control unit 14, peripheral control unit 14 is first according to formulaBe calculated that jth time sampling obtains turns
Speed njCorresponding speed v treating simulated target car loadj, further according to formula FE,j=a0+b×vj 2It is calculated and treats simulated target car load
Speed vjCorresponding road resistance FE,j, further according to formulaIt is calculated road resistance FE,jCorresponding starts
Machine output shaft torque ME,j, then, peripheral control unit 14 is according to road resistance FE,jCorresponding engine output shaft moment of torsion ME,jControl
The moment of torsion of dynamometer machine motor 9, makes moment of torsion and the road resistance F of dynamometer machine motor 9E,jCorresponding engine output shaft moment of torsion ME,jPhase
Deng；Meanwhile, the moment of torsion of dynamometer machine motor 9 is measured and measurement moment of torsion is transferred to peripheral control unit 14 by force transducer 10,
Peripheral control unit 14 records measuring moment of torsion and stores；Wherein, the value of j is the natural number of 1～n, and n is sampling total degree
And the natural number that value is 1～200；I is the final drive ratio treating simulated target car load；R is the driving treating simulated target car load
Wheel rolling radius andDrimFor treating the rim diameter of simulated target car load,
Hflat-ratioFor treating the aspect ratio of the tire of simulated target car load, W is the deflected width of tyre treating simulated target car load；a0For treating
The front-wheel resistance to rolling of simulated target car load, b is coefficient of air resistance；
Speed v treating simulated target car load that step 2, peripheral control unit 14 are receivedjCorresponding measurement moment of torsion with
According to formulaCalculated speed v treating simulated target car loadjCorresponding road resistance FE,jCorresponding
Engine output shaft moment of torsion ME,jComparing, the measurement torque obtained when n sampling is turned round with calculated engine output shaft
When square difference is not all in the range of the 2%～10% of calculated engine output shaft moment of torsion, repeated execution of steps three,
Until sampling for n time, the measurement torque and calculated engine output shaft torque difference obtained is all at calculated electromotor
In the range of the 2%～10% of output shaft torque；
Step 3, peripheral control unit 14 control dynamometer machine motor 9 and run to corresponding to treating the highest of simulated target car load
After the maximum (top) speed that speed is corresponding, peripheral control unit 14 stops being controlled the rotating speed of dynamometer machine motor 9, makes described dynamic analog
Intend dynamometer machine simulation and treat that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, the rotating speed transmission that the rotating speed of dynamometer machine motor 9 is measured and measurement arrived by encoder 1
To peripheral control unit 14, peripheral control unit 14 is according to formulaIt is calculated the rotating speed that jth time sampling obtains
njCorresponding speed v treating simulated target car loadj, and inquire about speed v treating simulated target car load being stored thereinjCorresponding
Last time slides the measurement moment of torsion in simulation process, and peripheral control unit 14 slides the measurement moment of torsion in simulation process according to the last time
Control the moment of torsion of dynamometer machine motor 9, make the measurement moment of torsion phase that the moment of torsion of dynamometer machine motor 9 slides in simulation process with the last time
Deng；Meanwhile, the moment of torsion of dynamometer machine motor 9 is measured and measurement moment of torsion is transferred to peripheral control unit 14 by force transducer 10,
Peripheral control unit 14 records measuring moment of torsion and stores；
The measurement moment of torsion performing step 3 record and storage for the last time is defined as treating mould by step 4, peripheral control unit 14
Intend the road resistance that the vehicle of target car load is corresponding；
It is dynamo-electric that step 5, peripheral control unit 14 control measurement of power according to the road resistance that the vehicle treating simulated target car load is corresponding
The moment of torsion of machine 9, the road resistance making the moment of torsion of dynamometer machine motor 9 corresponding with the vehicle treating simulated target car load is equal.
In the present embodiment, as it is shown in fig. 7, described peripheral control unit 14 includes main control computer 14-1 and main control computer
PLC module 14-2 that 14-1 connects and the converter 14-3 that is connected with PLC module 14-2.
In the present embodiment, step one and step 3 peripheral controller 14 control dynamometer machine motor 9 and run to corresponding to treating
The detailed process of the maximum (top) speed of the max. speed of simulated target car load is:
Step A, main control computer 14-1 sets and treats the rim diameter D of simulated target car loadrim, treat that simulated target is whole
The aspect ratio H of the tire of carflat-ratio, treat the deflected width of tyre W of simulated target car load and treat the final stage of simulated target car load
Gear ratio i (is the gear ratio between engine output shaft and the driving wheel for the treatment of simulated target car load)；And at main control computer
14-1 is upper sets front-wheel resistance to rolling a treating simulated target car load0With coefficient of air resistance b；
Step B, main control computer 14-1 are according to formulaIt is calculated dynamometer machine motor 9 to correspond to
Treat max. speed v of simulated target car loadmaxMaximum (top) speed nmax, wherein, i is the final drive ratio treating simulated target car load,
For treating that the gear ratio of each gear of simulated target car load is long-pending；R be the driving wheel treating simulated target car load rolling radius and
Dynamometer machine motor 9 is corresponded to treat max. speed v of simulated target car load by step C, main control computer 14-1max's
Maximum (top) speed nmaxBeing transferred to PLC module 14-2, PLC module 14-2 is transmitted further to converter 14-3, converter 14-3 and drives measurement of power
Dynamometer machine motor 9 in dynamo-electric machine 9 runs to the maximum (top) speed of the max. speed corresponding to treating simulated target car load.
Embodiment 2
As shown in Figure 4, Figure 5 and Figure 6, the engine test of the present embodiment dynamic analog dynamometer machine, different from embodiment 1
: described inertial flywheel is flanged type inertial flywheel 13, and described flanged type inertial flywheel 13 includes that discoidal flanged type flies
Take turns body 13-1 and be arranged on the center position of flanged type flywheel body 13-1 and for connecting the flanged type flywheel of flywheel shaft 4
Installing hole 13-2, the side, both sides of described flanged type flywheel body 13-1 is provided with the loss of weight technology groove 13-3 of annular.
Remaining structure is the most same as in Example 1.By arranging loss of weight technology groove 13-3, it is possible to realize the used of large radius with less material
Property flywheel, and then it is capable of the simulation of relatively large inertia, save material and cost, and expand range of application.
The road resistance analogy method of the engine test dynamic analog dynamometer machine of the present embodiment is same as in Example 1.
In sum, when the engine test in embodiment 1 and embodiment 2 uses with dynamic analog dynamometer machine, will wait to try
The output shaft issuing after examination and approval motivation is connected with dynamometer machine main spindle coupling 12, treats that the inertia of simulated target car load is this dynamic analog measurement of power
The inertia of machine and electrical analogue inertia sum, the inertia of this dynamic analog dynamometer machine is the inertia of described inertial flywheel, measurement of power electromechanics
The inertia sum of the inertia of the output shaft of machine 9, the inertia of flywheel shaft shaft coupling 6 and dynamometer machine main spindle coupling 12, electrical analogue is used to
Amount is the inertia being controlled the rotating speed of dynamometer machine motor 9 obtaining by peripheral control unit, by this dynamic analog dynamometer machine
Inertia and electrical analogue inertia, it is possible to realize treating the accurate simulation of inertia of simulated target car load；By peripheral control unit control
The moment of torsion of dynamometer machine motor 9 processed, additionally it is possible to realize treating the simulation of road resistance corresponding to the speed of simulated target car load；Thus
Just can the vehicle performance of accurate simulation motorcycle, automobile etc. on threst stand.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, every according to the present invention
Any simple modification, change and the equivalent structure change that above example is made by technical spirit, all still falls within skill of the present invention
In the protection domain of art scheme.
Claims (8)
1. an engine test dynamic analog dynamometer machine, it is characterised in that: include base (7) and be fixedly connected on base
(7) the first inertial flywheel bearings (2) on, the second inertial flywheel bearings (5), the first motor bearings support (8) and
Second motor bearings supports (11), described first inertial flywheel bearings (2) and the upper peace of the second inertial flywheel bearings (5)
Equipped with flywheel shaft (4), it is positioned between described first inertial flywheel bearings (2) and the second inertial flywheel bearings (5)
The upper connection of one section of flywheel shaft (4) have inertial flywheel, described first motor bearings support (8) and the second motor bearings support (11) it
Between be provided with dynamometer machine motor (9), the two ends output shaft of described dynamometer machine motor (9) be separately mounted to first motor bearings support
(8) and the second motor bearings supports on (11), and the described dynamometer machine motor (9) output shaft near described inertial flywheel side passes through
Flywheel shaft shaft coupling (6) is connected with flywheel shaft (4), and described dynamometer machine motor (9) is away from the output shaft of described inertial flywheel side
Upper connection has dynamometer machine main spindle coupling (12), and the end of described flywheel shaft (4) connects to be had for entering the rotating speed of flywheel shaft (4)
The encoder (1) that row is measured, the shell of described dynamometer machine motor (9) is provided with one end solid with the shell of dynamometer machine motor (9)
Fixed connection, the other end are fixed with base (7) and are connected and for the force transducer measuring the moment of torsion of dynamometer machine motor (9)
(10)。
2. according to the dynamic analog dynamometer machine of the engine test described in claim 1, it is characterised in that: described inertial flywheel is
Monoblock type inertial flywheel (3), described monoblock type inertial flywheel (3) includes discoidal integral flywheel body (3-1) and arranges
At the center position of integral flywheel body (3-1) and be used for connecting the integral flywheel installing hole (3-2) of flywheel shaft (4).
3. according to the dynamic analog dynamometer machine of the engine test described in claim 1, it is characterised in that: described inertial flywheel is
Flanged type inertial flywheel (13), described flanged type inertial flywheel (13) includes discoidal flanged type flywheel body (13-1) and sets
Put at the center position of flanged type flywheel body (13-1) and be used for connecting the flanged type flywheel installing hole (13-of flywheel shaft (4)
2), the side, both sides of described flanged type flywheel body (13-1) is provided with the loss of weight technology groove (13-3) of annular.
4. according to the dynamic analog dynamometer machine of the engine test described in Claims 2 or 3, it is characterised in that: described dynamometer machine
Motor (9) is frequency conversion timing AC motor.
5. according to the dynamic analog dynamometer machine of the engine test described in Claims 2 or 3, it is characterised in that: described encoder
(1) it is optical-electricity encoder.
6. one kind utilizes carried out road resistance simulation according to the engine test dynamic analog dynamometer machine as described in claim 1
Method, it is characterised in that the method comprises the following steps:
Step one, by peripheral control unit (14) control dynamometer machine motor (9) run to corresponding to treating the highest of simulated target car load
After the maximum (top) speed of speed, peripheral control unit (14) stops being controlled the rotating speed of dynamometer machine motor (9), makes described dynamic analog
Intend dynamometer machine simulation and treat that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, the rotating speed transmission that the rotating speed of dynamometer machine motor (9) is measured and measurement arrived by encoder (1)
To peripheral control unit (14), peripheral control unit (14) is first according to formulaIt is calculated jth time sampling to obtain
Rotating speed njCorresponding speed v treating simulated target car loadj, further according to formula FE,j=a0+b×vj 2It is calculated and treats simulated target
Speed v of car loadjCorresponding road resistance FE,j, further according to formulaIt is calculated road resistance FE,jCorresponding
Engine output shaft moment of torsion ME,j, then, peripheral control unit (14) is according to road resistance FE,jCorresponding engine output shaft moment of torsion
ME,jControl the moment of torsion of dynamometer machine motor (9), make moment of torsion and the road resistance F of dynamometer machine motor (9)E,jCorresponding electromotor output
Axle moment of torsion ME,jEqual；Meanwhile, the moment of torsion of dynamometer machine motor (9) is measured and will measurement moment of torsion transmission by force transducer (10)
To peripheral control unit (14), peripheral control unit (14) records measuring moment of torsion and stores；Wherein, the value of j is 1～n
Natural number, n is sampling total degree and natural number that value is 1～200；I is the final drive ratio treating simulated target car load；R is
Treat the driving wheel of simulated target car load rolling radius andDrimFor treating simulated target
The rim diameter of car load, Hflat-ratioFor treating the aspect ratio of the tire of simulated target car load, W is the tire treating simulated target car load
Section width；a0For treating the front-wheel resistance to rolling of simulated target car load, b is coefficient of air resistance；
Speed v treating simulated target car load that step 2, peripheral control unit (14) are receivedjCorresponding measurement moment of torsion and root
According to formulaCalculated speed v treating simulated target car loadjCorresponding road resistance FE,jCorresponding sends out
Motivation output shaft torque ME,jCompare, when n sample the measurement torque obtained and calculated engine output shaft moment of torsion
When difference is not all in the range of the 2%～10% of calculated engine output shaft moment of torsion, repeated execution of steps three, directly
The measurement torque obtained to n sampling is all defeated at calculated electromotor with calculated engine output shaft torque difference
In the range of the 2%～10% of shaft moment of torsion；
Step 3, by peripheral control unit (14) control dynamometer machine motor (9) run to corresponding to treating the highest of simulated target car load
After the maximum (top) speed that speed is corresponding, peripheral control unit (14) stops being controlled the rotating speed of dynamometer machine motor (9), makes described dynamic
Morphotype is intended dynamometer machine simulation and is treated that simulated target car load slides into the taxiing procedures of resting state on road from max. speed；
Slide in simulation process, the rotating speed transmission that the rotating speed of dynamometer machine motor (9) is measured and measurement arrived by encoder (1)
To peripheral control unit (14), peripheral control unit (14) is according to formulaIt is calculated what jth time sampling obtained
Rotating speed njCorresponding speed v treating simulated target car loadj, and inquire about speed v treating simulated target car load being stored thereinjRight
The last time answered slides the measurement moment of torsion in simulation process, and peripheral control unit (14) slides the survey in simulation process according to the last time
Amount moment of torsion controls the moment of torsion of dynamometer machine motor (9), makes the moment of torsion of dynamometer machine motor (9) and the last survey sliding in simulation process
Amount moment of torsion is equal；Meanwhile, outside the moment of torsion of dynamometer machine motor (9) is measured and is transferred to by measurement moment of torsion by force transducer (10)
Portion's controller (14), peripheral control unit (14) records measuring moment of torsion and stores；
The measurement moment of torsion performing step 3 record and storage for the last time is defined as waiting to simulate by step 4, peripheral control unit (14)
The road resistance that the vehicle of target car load is corresponding；
Step 5, peripheral control unit (14) control dynamometer machine motor according to the road resistance that the vehicle treating simulated target car load is corresponding
(9) moment of torsion, the road resistance making the moment of torsion of dynamometer machine motor (9) corresponding with the vehicle treating simulated target car load is equal.
The most in accordance with the method for claim 6, it is characterised in that: described peripheral control unit (14) includes main control computer (14-
1) PLC module (14-2) being connected with main control computer (14-1) and the converter (14-3) being connected with PLC module (14-2).
The most in accordance with the method for claim 7, it is characterised in that: step one and step 3 peripheral controller (14) control to survey
The detailed process of the maximum (top) speed that merit electromechanics machine (9) runs to the max. speed corresponding to treating simulated target car load is:
Step A, treat the rim diameter D of simulated target car load upper setting of main control computer (14-1)rim, treat simulated target car load
The aspect ratio H of tireflat-ratio, treat simulated target car load deflected width of tyre W and treat simulated target car load final stage pass
Move and compare i；And front-wheel resistance to rolling a of simulated target car load is treated in the upper setting of main control computer (14-1)0And coefficient of air resistance
b；
Step B, main control computer (14-1) are according to formulaIt is calculated dynamometer machine motor (9) to correspond to
Treat max. speed v of simulated target car loadmaxMaximum (top) speed nmax, wherein, r is the rolling of the driving wheel treating simulated target car load
Radius and
Dynamometer machine motor (9) is corresponded to treat max. speed v of simulated target car load by step C, main control computer (14-1)max's
Maximum (top) speed nmaxBeing transferred to PLC module (14-2), PLC module (14-2) is transmitted further to converter (14-3), converter (14-3)
The dynamometer machine motor (9) in dynamometer machine motor (9) is driven to run to the maximum of the max. speed corresponding to treating simulated target car load
Rotating speed.
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