CN102889996A - Complete vehicle signal simulation device - Google Patents
Complete vehicle signal simulation device Download PDFInfo
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- CN102889996A CN102889996A CN2012104078951A CN201210407895A CN102889996A CN 102889996 A CN102889996 A CN 102889996A CN 2012104078951 A CN2012104078951 A CN 2012104078951A CN 201210407895 A CN201210407895 A CN 201210407895A CN 102889996 A CN102889996 A CN 102889996A
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Abstract
The invention discloses a complete vehicle signal simulation device, which is used for solving the problem that as fault signals of post-processing parts of a vehicle are not shielded when an engine of the vehicle is tested, the fault signals of the post-processing parts causes influence on acquisition of fault signals of parts with high importance levels by testing software in the prior art. The complete vehicle signal simulation device comprises multiple signal simulation elements which are connected with a processor of the engine of the vehicle, and are used for simulating the signals of the unmounted parts of the vehicle according to a control signal sent from the processor. The device can prevent the testing software from reading the fault information of the unmounted parts, thus, the testing software preferentially reads the fault information of the parts with high importance levels, and the error rate of fault diagnosis is reduced.
Description
Technical field
The present invention relates to the test run communication field, in particular to a kind of car load signal imitation equipment.
Background technology
Before vehicle dispatches from the factory, need to test vehicle, whether reach requirement with power and the moment of torsion that detects vehicle.The part of the aftertreatment part of vehicle in front is not installed owing to dispatching from the factory, so in the process of test, the part of the mounting parts information that can break down not.The method of at present vehicle being tested adopts terminal box more, and this mode can guarantee engine and seat stand communication, still the fault-signal of the aftertreatment part of vehicle is not shielded.These uninstalled parts, for the front test of dispatching from the factory of vehicle, do not need to test, simultaneously, testing software, EOL(End Of Line for example, engine down line process) testing software at most only can read 10 failure messages, this just causes data of needs tests can't be read, and the data that such as engine, fuel injector, oil pump metering units etc. broken down may reach maximal value and can't be read because of testing software read failure data.Therefore, need a kind of method to shield not need the fault-signal of the part that detects.
Summary of the invention
The invention provides a kind of car load signal imitation equipment, be used for solving of the prior art when car is dispatched from the factory front test, owing to the fault-signal of the aftertreatment part of car do not shielded, and the testing software that causes can't obtain the problem of the fault-signal that needs test.
The invention provides a kind of car load signal imitation equipment, comprising: a plurality of signal imitation elements, link to each other with the processor of the engine of car, be used for the signal of the uninstalled part of control signal simulation car that sends according to processor.
Wherein, above-mentioned processor is electronic control unit ECU.
Wherein, above-mentioned signal imitation element comprises following one or more combination at least: telefault, resistance, switch, power supply and pilot lamp.
Wherein, above-mentioned signal imitation element is resistance, and resistance links to each other with two pins of processor respectively, and the polymorphic switch, the oil that are used for the simulation car have water sensor pilot lamp and liquid level sensor of urea box.
Wherein, above-mentioned signal imitation element is a plurality of telefaults, the two ends of each telefault link to each other with two pins processing respectively, and the nozzle, starting relay, the urea box that are respectively applied to simulate car add thermoelectrical magnetic valve, electromagnetic fan, urea pressure transducer and urea return flow solenoid valve.
Wherein, above-mentioned signal imitation element is power supply and inverter, is used for providing the two-way voltage signal, the signal the when gas pedal of simulation car is in different gear.
Wherein, above-mentioned signal imitation element comprises: the first power supply, the first coil, the second coil and pilot lamp; The two ends of pilot lamp link to each other with two pins of processor respectively; The first power supply links to each other with a pin of processor, and an end of the first coil and the second coil links to each other with a pin of processor respectively, and the other end of the first coil and the second coil links to each other with an end of pilot lamp after connecting; When the water in the fuel preliminary filter water storage cup reached the appointment water level, the first power supply output control signal obtained processor control pilot lamp and opens to processor; Ponding in fuel preliminary filter water storage cup surpasses upper prescribing a time limit, and the first power supply output control signal is to processor, and processor control pilot lamp is opened.
Wherein, above-mentioned signal imitation element comprises: add the electrothermal relay analog element, be used for the electrothermal relay that adds of simulation car, add the electrothermal relay analog element and comprise: second source, the 3rd power supply, the first resistance and the second resistance; The two ends of the first resistance link to each other with two pins of processor respectively, and the first end of the second resistance links to each other with the first power supply by switch, consists of the first branch road, and the second end of the second resistance is by switch and a pin that is connected in processor after second source links to each other.
Wherein, above-mentioned signal imitation element is a plurality of power supplys, links to each other with the pin of processor respectively, and being used for as required, the part of the car of simulation provides different voltage signals.
Wherein, above-mentioned signal imitation element is a plurality of train of impulses output terminal PTO and a plurality of resistance, the resistance series connection, and an end of each resistance connects respectively a train of impulses output terminal;
The signal input part that links to each other with the processor pin is selected to be connected with a end in a plurality of pulse output ends or to disconnect according to the residing operating mode of car.
Car load signal imitation equipment of the present invention, owing to adopting the signal imitation element to link to each other to simulate the uninstalled part of car with processor, processor is by the signal of the signal imitation element that reads, substitute the signal of the uninstalled part of car, thereby can avoid testing software to read the failure message of uninstalled part, make testing software can preferentially read the failure message of the higher part of severity level, thereby reduced the error rate of fault diagnosis.
Description of drawings
Fig. 1 is the structural representation of car load signal imitation equipment of the present invention;
Fig. 2 is the circuit theory diagrams of the polymorphic switch of simulation car;
Fig. 3 is the circuit theory diagrams that the simulation car adds the electrothermal relay group.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the embodiment of the invention is described in further detail.
Car load signal imitation equipment of the present invention adopts resistance, telefault, the circuit component such as power supply and switch is simulated the uninstalled part of car, when reading the test data of car in testing software like this, the test result of uninstalled part shows normal, and testing software then can preferentially read the higher test data of severity level.
Fig. 1 is the structural representation of car load signal imitation equipment of the present invention.
As shown in Figure 1, it is mutual that the processor of the engine of this car load signal imitation equipment and car carries out signal, thus the uninstalled part of simulation car.
Processor links to each other with the engine of car, can be according to the current operating mode of living in of car, and to each signal imitation element output control signal, then the signal of read signal analog element is sent to external test facility with the signal that reads.Particularly, processor can be according to the current operating mode of living in of car, and by transmitting control signal to control access or the disconnection of each signal imitation element to each pin, processor is sent to testing software with the signal of the signal imitation element that reads.
Wherein, this processor can adopt automobile specified microcomputerized controller ECU(Electronic ControlUnit, electronic control unit).This processor can carry out computing, processing, judgement according to the information that program and the data of internal memory are taken into account various sensor inputs to air mass flow, and then output order provides the electric impulse signal of certain width with the control distributive value to fuel injector.
Wherein, car load signal imitation equipment of the present invention is comprised of the signal imitation element on a plurality of processors that are connected to car engine, signal imitation element 1 as shown in fig. 1 links to each other with above-mentioned processor to signal imitation element N, be used for the uninstalled aftertreatment part of simulation car, and simulate the signal of uninstalled part according to control signal.Wherein, can simulate single part with independent signal imitation element, also can adopt a plurality of signal imitation elements to connect a rear mold endorsement part.Wherein, the signal imitation element can comprise following a kind of and multiple combination at least: telefault, resistance, switch, power supply and pilot lamp.That is to say, when the uninstalled part of car is simulated, can adopt and specify the resistance of resistance to simulate a part that resistance is identical with it, for example, the resistance of the urea sensor by test carriage is 5.1 ohm, so the resistance that can directly adopt one 5.1 ohm directly is connected to two pin places of processor, be used for replacing the urea sensor of car, like this, when the EOL of testing software reads the test data of car by car load signal imitation equipment, just can read the normal signal of urea sensor, otherwise, because car is not installed urea sensor, the signal of the urea sensor that EOL reads can be treated to fault-signal for disconnecting.
Fig. 2 is the circuit theory diagrams of the polymorphic switch of simulation car.
The polymorphic switch of car can switch the gear of polymorphic switch according to the load of car load, realizes that car load moves under different capacity, can save fuel oil.As shown in Figure 2, adopt four pulse output ends and four resistance of connecting to simulate the polymorphic switch of car, wherein resistance series connection, an end of each resistance connects respectively a train of impulses output terminal; The signal input part that links to each other with the processor pin is selected to be connected with a end in a plurality of pulse output ends or to disconnect according to the residing operating mode of car.When signal input part is connected with train of impulses output (PulseTrain Output) PTO1, PTO2, PTO3 and PTO4, can access different resistances.Need to prove, the uninstalled part that can simulate with resistance of any car can adopt this mode to simulate.
Simultaneously, can stop the participation alternating current to pass through according to telefault, and only allow direct current pass through, the characteristics that also have simultaneously the effect of filtering, can adopt telefault to simulate the uninstalled part of part, for example the nozzle of car, starting relay, urea box add thermoelectrical magnetic valve, electromagnetic fan, urea pressure transducer and urea return flow solenoid valve and in fact can link to each other to simulate with the two ends of processor with a telefault.
Can adopt power supply to be connected with inverter on the pin with processor, power supply provides the two-way voltage signal by inverter, the signal the when gas pedal of simulating simultaneously car by changing voltage signal is in different gear.
Can simulate in the uninstalled oil of car by following each element and water sensor be arranged, the first power supply, the first coil, the second coil and pilot lamp; Wherein, the two ends of pilot lamp link to each other with two pins of processor respectively; The first power supply links to each other with a pin of processor, and an end of the first coil and the second coil links to each other with a pin of processor respectively, and the other end of the first coil and the second coil links to each other with an end of pilot lamp after connecting; When the water in the air filter collecting bowl reaches the appointment water level, the first power supply outputs signal to processor, processor control pilot lamp is opened, discharge water with the prompting driver, ponding in fuel preliminary filter water storage cup surpasses upper prescribing a time limit, described the first power supply output control signal is given described processor, and described processor is controlled described pilot lamp and opened, and reminding driver drains the water away as early as possible.
Fig. 3 is the circuit theory diagrams that the simulation car adds the electrothermal relay group.
It is emission treatment for engine that the aftertreatment of vehicle adds electrothermal relay, as shown in Figure 3, can adopt following signal imitation element to come the simulation heating relay: second source, the 3rd power supply, the first resistance and the second resistance; The two ends of the first resistance link to each other with two pins of processor respectively, and the first end of the second resistance links to each other with the first power supply by switch, consists of the first branch road, and the second end of the second resistance is by switch and a pin that is connected in processor after second source links to each other.Because vehicle need to be installed and adds the electrothermal relay group, therefore, can add the electrothermal relay group what processor connected a plurality of simulations with said structure.The well heater at each position of aftertreatment of car is subject to processing the steering logic management of device, after processor is accepted the instruction of after-treatment system external heating, the logic that has set according to software, by each corresponding stitch, respectively steering order is sent in the corresponding signal imitation element of simulation heating relay, connect heating arrangement, and feedback signal is sent it back processor, as shown in the figure, 5V is feedback signal in the analogue means.
The characteristic of the part of the car that can also simulate as required in the present invention also can adopt a plurality of power supplys, links to each other with the pin of processor respectively, and the part of the car of simulation provides different voltage signals for processor as required.
Car load signal imitation equipment of the present invention, owing to adopting the elements such as resistance, telefault, power supply and switch to link to each other with processor, processor reads the signal of each element, be used for substituting the signal of the uninstalled part of car, thereby can avoid testing software to read the failure message of uninstalled part, can preferentially read the failure message of the higher part of severity level, thereby reduce the error rate of fault diagnosis.
Need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operational zone, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. a car load signal imitation equipment is characterized in that, comprising:
A plurality of signal imitation elements link to each other with the processor of the engine of car, are used for the signal of the uninstalled part of control signal simulation car that sends according to described processor.
2. equipment according to claim 1 is characterized in that, described processor is electronic control unit ECU.
3. equipment according to claim 1 is characterized in that, described signal imitation element comprises following one or more combination at least:
Telefault, resistance, switch, power supply and pilot lamp.
4. equipment according to claim 1 is characterized in that, described signal imitation element is resistance, and described resistance links to each other with two pins of processor respectively, and the polymorphic switch, the oil that are used for the simulation car have water sensor pilot lamp and liquid level sensor of urea box.
5. equipment according to claim 1, it is characterized in that, described signal imitation element is a plurality of telefaults, the two ends of each telefault link to each other with two pins of described processing respectively, and the nozzle, starting relay, the urea box that are respectively applied to simulate car add thermoelectrical magnetic valve, electromagnetic fan, urea pressure transducer and urea return flow solenoid valve.
6. equipment according to claim 1 is characterized in that, described signal imitation element is power supply and inverter, is used for providing the two-way voltage signal, the signal the when gas pedal of simulation car is in different gear.
7. equipment according to claim 1 is characterized in that, described signal imitation element comprises:
The first power supply, the first coil, the second coil and pilot lamp;
The two ends of described pilot lamp link to each other with two pins of described processor respectively;
Described the first power supply links to each other with a pin of described processor, one end of described the first coil and the second coil links to each other with a pin of described processor respectively, and the other end of described the first coil and the second coil links to each other with an end of described pilot lamp after connecting;
When the water in the fuel preliminary filter water storage cup reached the appointment water level, described the first power supply output control signal was given described processor, obtained processor and controlled described pilot lamp unlatching;
Ponding in fuel preliminary filter water storage cup surpasses upper prescribing a time limit, and described the first power supply output control signal is given described processor, and described processor is controlled described pilot lamp and opened.
8. equipment according to claim 1 is characterized in that, described signal imitation element comprises:
Add the electrothermal relay analog element, be used for the electrothermal relay that adds of simulation car, the described electrothermal relay analog element that adds comprises:
Second source, the 3rd power supply, the first resistance and the second resistance;
The two ends of described the first resistance link to each other with two pins of described processor respectively, the first end of described the second resistance links to each other with the first power supply by switch, consist of the first branch road, the second end of described the second resistance is by switch and a pin that is connected in described processor after second source links to each other.
9. equipment according to claim 1 is characterized in that, described signal imitation element is a plurality of power supplys, links to each other with the pin of described processor respectively, and being used for as required, the part of the car of simulation provides different voltage signals.
10. equipment according to claim 1 is characterized in that, described signal imitation element is a plurality of train of impulses output terminal PTO and a plurality of resistance,
Described resistance series connection, an end of each resistance connects respectively a train of impulses output terminal;
The signal input part that links to each other with described processor pin is selected to be connected with a end in described a plurality of pulse output ends or to disconnect according to the residing operating mode of car.
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| CN201210407895.1A CN102889996B (en) | 2012-10-23 | 2012-10-23 | A kind of complete vehicle signal simulation device |
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| CN113034883A (en) * | 2021-02-26 | 2021-06-25 | 广西玉柴机器股份有限公司 | Method and device for realizing virtual post-processing system platform |
| CN113551856A (en) * | 2021-07-21 | 2021-10-26 | 安徽江淮汽车集团股份有限公司 | Off-line detection method for pipeline leakage of fuel vehicle |
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