Electromagnetic oil nozzle resistance value measuring circuit

Abstract

The utility model discloses a resistance value measuring circuit for an electromagnetic oil nozzle. The resistance value measuring circuit for the electromagnetic oil nozzle comprises a control chip and an acquisition and measurement circuit, the control chip is provided with two or more PB pin ends and AD pin ends; the collecting and measuring circuit is provided with an electric connecting end, a plurality of oil nozzle connecting ends and an operational amplifier module U1. According to the utility model, the control chip and the acquisition and measurement circuit are arranged, and the acquisition and measurement circuit is provided with two or more PB pin ends and AD pin ends, so that the electromagnetic oil nozzle resistance value measurement circuit is used for carrying out resistance detection on a plurality of electromagnetic oil nozzles, and repeated plugging of the electromagnetic oil nozzles is not needed; the steps are simplified, the detection and measurement efficiency is improved, the connected electromagnetic oil nozzles are controlled to be detected one by one, the consistency is ensured, and the resistance detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic fuel nozzle detection device, specifically relates to a kind of electromagnetic fuel nozzle resistance value measurement circuit. BACKGROUND

[0002] Due to the advantages of fuel direct injection technology (GDI) in power, fuel economy and emission environmental protection, it is more and more widely used in the field of automobile power system. As the core component, the life cycle performance of the fuel nozzle directly determines the life cycle performance of the engine. The existing fuel nozzle is mainly electromagnetic fuel nozzle, and the existing detection method mainly uses single electromagnetic fuel nozzle detection measurement. This method has slow measurement efficiency, complicated steps, and cannot simultaneously detect multiple electromagnetic fuel nozzles, which affects the maintenance of maintenance personnel and cannot guarantee the consistency of detection resistance precision error, detection precision and consistency, which affects the subsequent use performance. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of electromagnetic fuel nozzle resistance value measurement circuit for the technical deficiency of the present, to solve the technical problems that electromagnetic fuel nozzle in prior art cannot be batch detected, consistency and detection resistance precision are poor.

[0004] The technical scheme adopted by the utility model to achieve the above-mentioned purpose is:

[0005] A kind of electromagnetic fuel nozzle resistance value measurement circuit, it is applied to electromagnetic fuel nozzle measuring device, the electromagnetic fuel nozzle resistance value measurement circuit includes control chip and acquisition measurement circuit, the control chip is electrically connected with the acquisition measurement circuit;

[0006] The control chip is provided with two or more PB pin ends and AD pin ends, and the control chip is used to control the conduction of the acquisition measurement circuit, current acquisition, operation and resistance value measurement feedback;The PB pin end is used for the output of high-level signal or low-level signal;The AD pin end is used for the function of signal acquisition and sampling;

[0007] The acquisition measurement circuit is provided with an electrical connection end, a plurality of fuel nozzle connection ends and an operational amplifier module U1;The electrical connection end is used for electrical connection with external power supply, so as to supply power;The acquisition measurement circuit is used to acquire the current and differential pressure signal of the fuel nozzle;The operational amplifier module U1 is used for the amplification of differential pressure signal;Multiple fuel nozzle connection ends are used for electrical connection with fuel nozzle.

[0008] Further improvement, a plurality of said fuel injection nozzle connecting end includes the connecting end A and connecting end B; the collection measurement circuit includes switch element Q, resistance R1 and resistance R2, the switch element Q and the operational amplifier module U1, resistance R1 one end, resistance R2 one end electrical connection; the other end of resistance R1 and operational amplifier module U1 are connected; the other end of resistance R2 and the PB pin end are connected; the switch element Q is used for the conduction and closing of current when a single electromagnetic fuel injection nozzle is tested.

[0009] Further improvement, the switch element Q is provided with a first connecting end, a second connecting end and a third connecting end; the operational amplifier module U1 includes a noninverting input, an inverting input and an output; the first connecting end is connected with the connecting end B, the second connecting end is connected with the noninverting input, and the third connecting end is connected with one end of the resistance R2;

[0010] The fourth connecting end is provided between the second connecting end and the noninverting input, one end of the resistance R1 is connected with the fourth connecting end, and the other end of the resistance R1 is connected with the inverting input;

[0011] The output is connected with the AD pin end.

[0012] Further improvement, a fifth connecting end is provided between the other end of the resistance R1 and the inverting input, and a power supply negative pole GND connecting end is connected with the fifth connecting end; the power supply negative pole GND connecting end is used for electrical connection with the power supply negative pole of the outside world, so as to realize the power supply function.

[0013] Further improvement, the switch element Q is a triode, the first connecting end is a collector, the second connecting end is an emitter, and the third connecting end is a collector.

[0014] Further improvement, the switch element Q is a MOS tube, the first connecting end is a D pole, the second connecting end is an S pole, and the third connecting end is a G pole.

[0015] Further improvement, the operational amplifier module U1 is an operational amplifier LM747.

[0016] Further improvement, the electrical connecting end is provided with a resistance R3, and the other end of the resistance R3 is connected with the connecting end A.

[0017] Further improvement, the control chip is also provided with a communication connecting end, the communication connecting end is provided with a communication module, and the communication module is connected with a display module; the communication module is used for the communication feedback of processed information; and the display module is used for the visual feedback display of data.

[0018] As a further improvement, the control chip is also provided with a data connection end and a power supply connection end; the data connection end is used for connection with an external programming device, and the power supply connection end is used for electrical connection with an external driving power supply for power supply.

[0019] Compared with the prior art, the electromagnetic fuel nozzle resistance value measurement circuit provided in the embodiments of the utility model has at least one of the following technical effects:

[0020] The utility model discloses a control chip and collection measurement circuit are set up, collection measurement circuit is equipped with two or more PB pin end and AD pin end, make the electromagnetic fuel nozzle resistance value measurement circuit for the resistance detection of multiple electromagnetic fuel nozzles, do not need repeatedly insert electromagnetic fuel nozzle repeatedly, simplify the step, improve the detection measurement efficiency at the same time, control chip is used for the role of the turn -on of collection measurement circuit, current collection operation and resistance value measurement feedback, PB pin end is used for the output of high level signal or low level signal, thereby control detects every one of the connected electromagnetic fuel nozzle, guarantee the consistency, improve the precision of resistance detection, AD pin end is used for the collection sampling of signal, collection measurement circuit is equipped with electric connection end, a plurality of fuel nozzle connection end and operational amplifier module U1, electric connection end is used for with external power supply electric connection, thereby the role of power supply, collection measurement circuit is used for the collection of fuel nozzle's current and pressure difference signal, operational amplifier module U1 is used for the amplification of pressure difference signal. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0022] Fig. 1 It is the circuit schematic diagram of the electromagnetic fuel nozzle resistance value measurement circuit of the embodiment;

[0023] Fig. 2 It is the circuit schematic diagram of another switch element of the electromagnetic fuel nozzle resistance value measurement circuit of the embodiment. DETAILED DESCRIPTION

[0024] The following description is only the preferred embodiment of the utility model, and does not limit the protection scope of the utility model.

[0025] Embodiment, see attached Figs. 1-2The utility model provides an electromagnetic fuel nozzle resistance value measuring circuit 1 which is applied to an electromagnetic fuel nozzle measuring device, and comprises a control chip 2 and a collection and measurement circuit 3, wherein the control chip 2 is electrically connected with the collection and measurement circuit 3.

[0026] The control chip 2 is provided with two or more PB pin ends and AD pin ends, and is used for controlling the conduction of the collection and measurement circuit 3, current collection and operation after current collection, and resistance value measurement feedback; the PB pin end is used for outputting a high-level signal or a low-level signal; the AD pin end is used for signal collection and sampling; the collection and measurement circuit 3 is provided with an electric connection end 30, a plurality of fuel nozzle connection ends 31, and an operational amplifier module U1; the electric connection end 30 is used for electrically connecting with an external power supply, thereby achieving the function of power supply; the collection and measurement circuit 3 is used for collecting current and pressure difference signals of the fuel nozzle; the operational amplifier module U1 is used for amplifying the pressure difference signal; and the plurality of fuel nozzle connection ends 31 are used for electrically connecting with the fuel nozzle.

[0027] Each of the plurality of fuel nozzle connection ends 31 comprises an inner connection end A and a connection end B; the collection and measurement circuit 3 comprises a switching element Q, a resistor R1, and a resistor R2; the switching element Q is electrically connected with the operational amplifier module U1, one end of the resistor R1, and one end of the resistor R2; the other end of the resistor R1 is connected with the operational amplifier module U1; the other end of the resistor R2 is connected with the PB pin end; and the switching element Q is used for controlling the conduction and closing of current when testing a single electromagnetic fuel nozzle.

[0028] The switching element Q is provided with a first connection end, a second connection end, and a third connection end; the operational amplifier module U1 comprises a non-inverting input end, an inverting input end, and an output end; the first connection end is connected with the connection end B, the second connection end is connected with the non-inverting input end, and the third connection end is connected with one end of the resistor R2; a fourth connection end is arranged between the second connection end and the non-inverting input end, one end of the resistor R1 is connected with the fourth connection end, and the other end of the resistor R1 is connected with the inverting input end; and the output end is connected with the AD pin end.

[0029] A fifth connection end is arranged between the other end of the resistor R1 and the inverting input end, and the fifth connection end is connected with a power supply negative pole GND connection end; the power supply negative pole GND connection end is used for electrically connecting with an external power supply negative pole, thereby achieving the function of power supply.

[0030] The switching element Q is a triode, the first connection end is a collector, the second connection end is an emitter, and the third connection end is a collector.

[0031] The switch element Q is a MOS tube, the first connection end is a D pole, the second connection end is an S pole, and the third connection end is a G pole.

[0032] The operational amplifier module U1 is an operational amplifier LM747.

[0033] The electric connection end 30 is provided with a resistor R3, the other end of the resistor R3 is connected with the connection end A, and the electric connection end 30 is used for connecting a +12V positive power supply.

[0034] The control chip 2 is further provided with a communication connection end 20, the communication connection end 20 is provided with a communication module 21, and the communication module 21 is connected with a display module 22; the communication module 21 is used for the action of information communication feedback after processing; and the display module 22 is used for the action of intuitive feedback display of data.

[0035] The control chip 2 is further provided with a data connection end 23 and a power supply connection end 24; the data connection end 23 is used for connection with an external programming device, and the power supply connection end 24 is used for the action of electric connection with an external driving power supply for power supply.

[0036] The working principle of the utility model is: the connection end A and the connection end B are electrically connected with two ends of the electromagnetic oil nozzle respectively, at the time of starting, the control chip starts to control the switch element Q to open the high level in the test circuit and close the low level in the non-test circuit, the current of the electric connection end in the test circuit flows to the connection end A through the resistor R3 and flows into the electromagnetic oil nozzle, the current flows to the connection end B through the electromagnetic oil nozzle, and then flows to the resistor R1 through the switch element Q to carry out resistance sampling and then flows back to the power supply negative pole GND connection end, when the current flows through the resistor R1, a pressure difference is generated between the two ends of the resistor R1, the pressure difference signal between the two ends of the resistor R1 is amplified or output to the control chip through the operational amplifier module U1, the control chip reads the value of the AD pin end, processes the value, and then feeds back to the display module, and then the control chip stops the test of the first group of test circuits and carries out resistance measurement of the electromagnetic oil nozzle of the next group of test circuits.

[0037] The utility model discloses a control chip and collection measurement circuit are set up, collection measurement circuit is equipped with two or more PB pin end and AD pin end, make the electromagnetic fuel nozzle resistance value measurement circuit is used for carrying out resistance detection to multiple electromagnetic fuel nozzles, need not repeatedly carry out the repeated plug of electromagnetic fuel nozzle, the step is simplified, improves the detection measurement efficiency at the same time, control chip is used for the function of controlling the conduction of collection measurement circuit, current collection operation and resistance value measurement feedback, PB pin end is used for the output of high level signal or low level signal, thereby control detects every one to the electromagnetic fuel nozzle of connection, guarantees the consistency, improves the precision of resistance detection, AD pin end is used for the collection sampling of signal, collection measurement circuit is equipped with electric connection end, multiple fuel nozzle connection end and operational amplifier module U1, electric connection end is used for with outside power supply electric connection, thereby carries out the function of power supply, collection measurement circuit is used for collecting the current and pressure difference signal of fuel nozzle, operational amplifier module U1 is used for the amplification function of pressure difference signal.

[0038] The utility model discloses not limited to the above-mentioned embodiment, adopt the same or approximate structure or device with the above-mentioned embodiment of the utility model, and obtain other for electromagnetic fuel nozzle resistance value measurement circuit, all are within the protection scope of the utility model.

Claims

1. An electromagnetic fuel injector resistance measuring circuit applied to an electromagnetic fuel injector measuring device, characterized by: The electromagnetic fuel injection nozzle resistance value measuring circuit comprises a control chip and a collection and measurement circuit, and the control chip is electrically connected with the collection and measurement circuit; The control chip is provided with two or more PB pin ends and AD pin ends, and is used for controlling the conduction of the collection and measurement circuit, current collection and operation after current collection, and resistance value measurement feedback; the PB pin end is used for outputting high level signals or low level signals; and the AD pin end is used for signal collection and sampling. The collection and measurement circuit is provided with an electric connection end, a plurality of fuel injection nozzle connection ends and an operational amplifier module U1; the electric connection end is used for electrically connecting with an external power supply to supply power; the collection and measurement circuit is used for collecting current and pressure difference signals of the fuel injection nozzle; the operational amplifier module U1 is used for amplifying the pressure difference signals; and the plurality of fuel injection nozzle connection ends are electrically connected with the fuel injection nozzle.

2. The electromagnetic injector resistance measurement circuit of claim 1, wherein: Each of the plurality of fuel injection nozzle connection ends comprises a connection end A and a connection end B; the collection and measurement circuit comprises a switching element Q, a resistor R1 and a resistor R2; the switching element Q is electrically connected with the operational amplifier module U1, one end of the resistor R1 and one end of the resistor R2; the other end of the resistor R1 is connected with the operational amplifier module U1; the other end of the resistor R2 is connected with the PB pin end; and the switching element Q is used for conducting and closing current when testing a single electromagnetic fuel injection nozzle.

3. The electromagnetic injector resistance measurement circuit of claim 2, wherein: The switching element Q is provided with a first connection end, a second connection end and a third connection end; the operational amplifier module U1 comprises a non-inverting input end, an inverting input end and an output end; the first connection end is connected with the connection end B, the second connection end is connected with the non-inverting input end, and the third connection end is connected with one end of the resistor R2; A fourth connection end is arranged between the second connection end and the non-inverting input end, one end of the resistor R1 is connected with the fourth connection end, and the other end of the resistor R1 is connected with the inverting input end; The output end is connected with the AD pin end.

4. The electromagnetic injector resistance measurement circuit of claim 3, wherein: A fifth connection end is arranged between the other end of the resistor R1 and the inverting input end, and a power supply negative pole GND connection end is connected with the fifth connection end; the power supply negative pole GND connection end is used for electrically connecting with an external power supply negative pole to supply power.

5. The electromagnetic injector resistance measurement circuit of claim 4, wherein: The switching element Q is a triode, the first connection end is a collector, the second connection end is an emitter, and the third connection end is a collector.

6. The electromagnetic injector resistance measurement circuit of claim 4, wherein: The switching element Q is a MOS tube, the first connection end is a D pole, the second connection end is an S pole, and the third connection end is a G pole.

7. The electromagnetic injector resistance measurement circuit of claim 5 or 6, wherein: The operational amplifier module U1 is an operational amplifier LM747.

8. The electromagnetic injector resistance measurement circuit of claim 7, wherein: The electric connection end is provided with a resistor R3, and the other end of the resistor R3 is connected with the connection end A.

9. The electromagnetic injector resistance measurement circuit of claim 8, wherein: The control chip is further provided with a communication connection end, the communication connection end is provided with a communication module, the communication module is connected with a display module; the communication module is used for information communication feedback after processing; and the display module is used for data intuitive feedback display.

10. The electromagnetic injector resistance measurement circuit of claim 9, wherein: The control chip is also provided with a data connection end and a power supply connection end; the data connection end is used for connection with external programming equipment, and the power supply connection end is used for electric connection with an external driving power supply for power supply.

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