Online identification circuit for diagnosis of oil nozzle

Abstract

The utility model discloses an on-line identification circuit for diagnosis of an oil nozzle, which is applied to an automobile oil nozzle detection device and comprises a micro processing chip MCU (microprogrammed control unit) and an identification driving circuit. The micro processing chip MCU is provided with a communication end, an ADC connection end and a PB connection end. The identification driving circuit comprises an electrical connection end, a conduction driving circuit and a backflow acquisition voltage division circuit; the conduction driving circuit is used for conducting control and is matched with the backflow acquisition voltage division circuit to form a current loop; and the backflow acquisition voltage division circuit is used for enabling the divided voltage to flow back to the micro processing chip MCU and obtaining the charging voltage change process of the oil nozzle. According to the utility model, through arranging the micro processing chip MCU and one or more identification driving circuits, detection of a plurality of oil nozzles can be realized, the detection efficiency is improved, detection of different types of automobile oil nozzles is realized, the compatibility is improved, the detection test efficiency is improved, and the detection test cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile fuel injection nozzle detection circuit, specifically relates to a kind of for fuel injection nozzle diagnosis online identification circuit. BACKGROUND

[0002] The automobile fuel injection nozzle of existing market fuel oil passenger car mainly includes according to driving voltage type: 1.12V-16V fuel injection nozzle;2.70-180V fuel injection nozzle.The automobile fuel injection nozzle is classified according to material type: 1. coil electromagnetic fuel injection nozzle;2. piezoelectric ceramic fuel injection nozzle, and the electromagnetic fuel injection nozzle used by existing automobile is 1.12V-24V voltage driving;Piezoelectric fuel injection nozzle used is 70-180V voltage driving, when the automobile fuel injection nozzle is overhauled, the existing mode is to detect using fuel injection nozzle driving device, to improve the overhauling efficiency, the traditional detection device includes low pressure fuel injection nozzle device, high pressure fuel injection nozzle device, coil electromagnetic fuel injection nozzle device and piezoelectric ceramic fuel injection nozzle device, when the detection of different types of automobile fuel injection nozzle is carried out, the detection device of corresponding driving is connected, cannot realize the test of one device compatible with multiple types of fuel injection nozzle, compatibility is poor, affects the efficiency of detection test, and increases the cost of detection test. SUMMARY

[0003] The utility model provides a kind of for fuel injection nozzle diagnosis online identification circuit, to solve the technical problem of poor compatibility of fuel injection nozzle detection in prior art, high cost in the present technical deficiency.

[0004] The technical scheme adopted by the utility model for achieving the above-mentioned purposes is:

[0005] A kind of for fuel injection nozzle diagnosis online identification circuit, it is applied to automobile fuel injection nozzle detection device, it includes micro processing chip MCU and one or above identification driving circuit, the micro processing chip MCU is electrically connected with the identification driving circuit;

[0006] The micro processing chip MCU is equipped with communication end, ADC connection end and PB connection end;The micro processing chip is used to control the driving opening of identification driving circuit and the feedback of the acquisition processing of tested signal;The communication connection end is used to connect communication module or display module, the ADC connection end is used for the acquisition of signal;The PB connection end is used for the action of high level or low level control output;

[0007] The recognition driving circuit comprises an electrical connection end, a conduction driving circuit and a backflow collection voltage division circuit; the electrical connection end is used for electrical connection with the oil injection nozzle; the conduction driving circuit is used for conduction control, and cooperates with the backflow collection voltage division circuit to form a current loop; the backflow collection voltage division circuit is used for backflow of the voltage after voltage division to a micro processing chip MCU, so that the micro processing chip MCU obtains a charging voltage change process of the oil injection nozzle.

[0008] The electrical connection end comprises an electrical connection end A and an electrical connection end B, and the electrical connection end A and the electrical connection end B are respectively electrically connected with two connection ends of the oil injection nozzle.

[0009] The backflow collection voltage division circuit comprises an input connection end V+ and a collection voltage division circuit, and the electrical connection end A and the electrical connection end B are respectively electrically connected with the collection voltage division circuit; the collection voltage division circuit is electrically connected with the ADC connection end; a first connection point is arranged between the electrical connection end A and the collection voltage division circuit, the first connection point is electrically connected with the input connection end V+, and a resistor R51 is arranged between the first connection point and the input connection end V+.

[0010] A diode D6 and a second connection point are arranged between the first connection point and the electrical connection end A, and a third connection point is arranged between the electrical connection end B and the collection voltage division circuit.

[0011] The collection voltage division circuit comprises a resistor R56 and a resistor R60, the resistor R56 and the resistor R60 are connected in series, one end of the resistor R56 is connected with the first connection point, one end of the resistor R60 is connected with a ground connection end, the third connection point is connected with one end of the resistor R60, a fourth connection point is arranged between the resistor R56 and the resistor R60, and the fourth connection point is connected with the ADC connection end.

[0012] The conduction driving circuit comprises a switching element, a resistor R53 and a resistor R54, one end of the resistor R53 is electrically connected with the second connection point, the other end of the resistor R53 is electrically connected with the switching element, the switching element is connected with the third connection point and one end of the resistor R54, and the other end of the resistor R54 is connected with the PB connection end.

[0013] The switching element is a switching triode Q1, a base of the switching triode Q1 is connected with one end of the resistor R54, a collector of the switching triode Q1 is connected with the other end of the resistor R53, and an emitter of the switching triode Q1 is electrically connected with the third connection point.

[0014] Further, the switch element is a MOS tube, a gate of the MOS tube is connected with one end of the resistor R54, a drain of the MOS tube is connected with the other end of the resistor R53, and a source of the MOS tube is connected with the third connection point.

[0015] Further, the fourth connection point is connected with the ADC connection end through a resistor R55 and a fifth connection point, the fifth connection point is provided with a capacitor C37 and a rectifier diode D15.

[0016] The rectifier diode D15 is provided with a connection end one, and the connection end one is used for connecting a 3.3V regulating voltage.

[0017] The other end of the capacitor C37 is connected with a ground end one.

[0018] Further, the micro processing chip MCU is further provided with an electric driving end and a data port.

[0019] Compared with the prior art, the one or more technical solutions provided by the embodiment of the utility model have at least one of the following technical effects:

[0020] The utility model discloses a micro processing chip MCU and one or more identification driving circuits are arranged to realize the detection and test of multiple oil injection nozzles, improve the detection efficiency, the micro processing chip is used for controlling the driving opening of identification driving circuit and the feedback of the collection and processing of the tested signal, the identification driving circuit for the diagnosis and identification of oil injection nozzle is formed by the electric connection end, the conduction driving circuit and the backflow collection voltage division circuit, the electric connection end is used for electric connection with the oil injection nozzle, the conduction driving circuit is used for the conduction control, cooperates the backflow collection voltage division circuit and forms the current loop, the backflow collection voltage division circuit is used for the voltage backflow to the micro processing chip MCU after voltage division, so that the micro processing chip MCU obtains the charging voltage variation process of the oil injection nozzle, and from the display module, whether the oil injection nozzle is damaged, does not charge, the normal charging phenomenon and the remaining power phenomenon of the normal oil injection nozzle can be judged, so that the oil injection nozzle can be judged in the unconnected state, the coil electromagnetic type oil injection nozzle or piezoelectric type oil injection nozzle diagnosis after the normal connection of the oil injection nozzle, the abnormality and short circuit of the oil injection nozzle, realize the detection of different types of automobile oil injection nozzles, improve the compatibility, improve the detection efficiency, and reduce the detection cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0022] Fig. 1 The circuit schematic diagram of the circuit for online identification of fuel nozzle diagnosis of the present embodiment;

[0023] Fig. 2 The circuit schematic diagram of another switch element of the circuit for online identification of fuel nozzle diagnosis of the present embodiment. DETAILED DESCRIPTION

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

[0025] Embodiment, see attached Figs. 1-2 A circuit for online identification of fuel nozzle diagnosis 1 is applied to an automobile fuel nozzle detection device, which comprises a micro processing chip MCU 2 and one or more identification driving circuits 3, the micro processing chip MCU 2 is electrically connected with the identification driving circuit 3;

[0026] The micro processing chip MCU 2 is provided with a communication end, an ADC connection end and a PB connection end; the micro processing chip is used for controlling the driving opening of the identification driving circuit 3 and the feedback of the collection and processing of the tested signal; the communication connection end 4 is used for connecting a communication module or a display module, the ADC connection end is used for the collection of signals; the PB connection end is used for the action of high level or low level control output;

[0027] The identification driving circuit 3 comprises an electrical connection end 30, a conduction driving circuit 31 and a backflow collection and voltage division circuit 32; the electrical connection end 30 is used for electrical connection with the fuel nozzle; the conduction driving circuit 31 is used for the action of conduction control, cooperates with the backflow collection and voltage division circuit 32 to form a current loop; the backflow collection and voltage division circuit 32 is used for the voltage after voltage division to flow back to the micro processing chip MCU 2, so that the micro processing chip MCU 2 obtains the charging voltage change process of the fuel nozzle.

[0028] The electrical connection end 30 comprises an electrical connection end A and an electrical connection end B, the electrical connection end A and the electrical connection end B are respectively electrically connected with two connection ends of the fuel nozzle;

[0029] The reflow collection voltage division circuit 32 comprises an input connection end V+ and a collection voltage division circuit, the electric connection end A and the electric connection end B are electrically connected with the collection voltage division circuit respectively; the collection voltage division circuit is electrically connected with the ADC connection end; a first connection point is arranged between the electric connection end A and the collection voltage division circuit, and the first connection point is electrically connected with the input connection end V+; a resistor R51 is arranged between the first connection point and the input connection end V+.

[0030] A diode D6 and a second connection point are arranged between the first connection point and the electric connection end A; a third connection point is arranged between the electric connection end B and the collection voltage division circuit.

[0031] The collection voltage division circuit comprises a resistor R56 and a resistor R60, the resistor R56 and the resistor R60 are connected in series, one end of the resistor R56 is connected with the first connection point; one end of the resistor R60 is connected with a ground connection end, and the third connection point is connected with one end of the resistor R60; a fourth connection point is arranged between the resistor R56 and the resistor R60, and the fourth connection point is connected with the ADC connection end; the collection voltage division circuit is used for signal voltage division of a tested signal, and the divided voltage signal is input to the ADC connection end of the micro processing chip MCU2 for signal collection.

[0032] The conduction driving circuit 31 comprises a switching element, a resistor R53 and a resistor R54, one end of the resistor R53 is electrically connected with the second connection point, and the other end of the resistor R53 is electrically connected with the switching element; the switching element is connected with the third connection point and one end of the resistor R54; the other end of the resistor R54 is connected with the PB connection end; the conduction driving circuit 31 is used for conduction driving of the action of the oil injection nozzle, so as to judge the type of the oil injection nozzle.

[0033] The switching element is a switching triode Q1; the base of the switching triode Q1 is connected with one end of the resistor R54, the collector of the switching triode Q1 is connected with the other end of the resistor R53, and the emitter of the switching triode Q1 is connected with the third connection point.

[0034] The switching element is a MOS tube, the gate of the MOS tube is connected with one end of the resistor R54, the drain of the MOS tube is connected with the other end of the resistor R53, and the source of the MOS tube is connected with the third connection point.

[0035] The fourth connecting point is provided with a resistance R55 and a fifth connecting point between the ADC connecting end; the fifth connecting point is provided with a capacitor C37 and a rectifier diode D15; the rectifier diode D15 is provided with a connecting end one, which is used for connecting a 3.3V regulating voltage, thereby realizing the function of step-up driving; the other end of the capacitor C37 is provided at a ground end one; the rectifier diode D15 is an SM4007PL rectifier diode, which is used for the function of rectification, and guarantees the stability of current.

[0036] The micro processing chip MCU2 is further provided with an electric driving end 5 and a data port 6; the electric driving end 5 is used for driving the micro processing chip MCU2; and the data port 6 is used for connecting external equipment to set the internal program of the micro processing chip MCU2.

[0037] The working principle of the utility model is: connecting the electric connection end A and the electric connection end B with the two connecting ends of the oil injection nozzle respectively, when testing, the PB connecting end of the micro processing chip MCU2 outputs high level to control the switching element to open, and outputs low level to control the switching element to close, then after data integration processing of the micro processing chip MCU2, the charge and discharge data are obtained, and then are fed back to the display module, whether the oil injection nozzle is damaged, not charged, normally charged or maintains the electric quantity, thereby it can be judged that the oil injection nozzle is in the unconnected state, the coil oil injection nozzle or piezoelectric oil injection nozzle diagnosis after normal connection of the oil injection nozzle, and the abnormal and short circuit conditions of the oil injection nozzle.

[0038] The utility model discloses a micro processing chip MCU and one or more than one recognition driving circuit can realize the effect of detecting and testing multiple oil injection nozzles, improve the detection efficiency, the micro processing chip is used for the effect of the driving opening of recognition driving circuit control and the collection processing feedback of tested signal, the recognition driving circuit that constitutes by electric connection end, on -off driving circuit and backflow collection voltage dividing circuit is used for the diagnostic identification action of oil injection nozzle, the electric connection end is used for the electric connection with oil injection nozzle, on -off driving circuit is used for the effect of on -off control, cooperates backflow collection voltage dividing circuit and forms the current loop, backflow collection voltage dividing circuit is used for the voltage after voltage division backflow to micro processing chip MCU, thereby makes micro processing chip MCU obtain the charging voltage variation process of oil injection nozzle, and from the feed to display module, whether the oil injection nozzle is damaged, not charged, normally charged or maintains the electric quantity, thereby it can be judged that the oil injection nozzle is in the unconnected state, the coil oil injection nozzle or piezoelectric oil injection nozzle diagnosis after normal connection of the oil injection nozzle, and the abnormal and short circuit conditions of the oil injection nozzle, realize the detection of different types of automobile oil injection nozzle, improve the compatibility, improve the detection efficiency of test, and reduce the cost of detection test.

[0039] The utility model is not limited to the above-mentioned embodiment, adopts same or approximate structure or device with the above-mentioned embodiment of the utility model, and obtains other online identification circuit for oil injection nozzle diagnosis, all are within the protection scope of the utility model.

Claims

1. An online identification circuit for fuel injector diagnosis, which is applied to a fuel injector testing device, comprising a micro processing chip (MCU) and one or more identification driving circuits, characterized in that: The micro processing chip MCU is electrically connected with the identification driving circuit; The micro processing chip MCU is provided with a communication terminal, an ADC connecting terminal and a PB connecting terminal; the micro processing chip is used for controlling the driving opening of the identification driving circuit and the feedback of the collection and processing of the tested signal; the communication terminal is used for connecting a communication module or a display module; the ADC connecting terminal is used for the collection of signals; and the PB connecting terminal is used for the high level or low level control output. The identification driving circuit comprises an electric connecting terminal, a conduction driving circuit and a backflow collection and voltage division circuit; the electric connecting terminal is used for electrically connecting with the oil injection nozzle; the conduction driving circuit is used for conduction control; and the backflow collection and voltage division circuit is used for backflow of the divided voltage to the micro processing chip MCU, so that the micro processing chip MCU obtains the charging voltage variation process of the oil injection nozzle.

2. The on-board diagnostic circuit for an oil injector according to claim 1, characterized in that: The electric connecting terminal comprises an electric connecting terminal A and an electric connecting terminal B, which are respectively electrically connected with two connecting terminals of the oil injection nozzle. The backflow collection and voltage division circuit comprises an input connecting terminal V+ and a collection and voltage division circuit; the electric connecting terminal A and the electric connecting terminal B are respectively electrically connected with the collection and voltage division circuit; the collection and voltage division circuit is electrically connected with the ADC connecting terminal; a first connecting point is arranged between the electric connecting terminal A and the collection and voltage division circuit; the first connecting point is electrically connected with the input connecting terminal V+; and a resistor R51 is arranged between the first connecting point and the input connecting terminal V+.

3. The on-board diagnostic circuit for an oil injector according to claim 2, characterized in that: A diode D6 and a second connecting point are arranged between the first connecting point and the electric connecting terminal A; and a third connecting point is arranged between the electric connecting terminal B and the collection and voltage division circuit.

4. The on-board diagnostic circuit for an oil injector according to claim 3, characterized in that: The collection and voltage division circuit comprises a resistor R56 and a resistor R60; the resistor R56 and the resistor R60 are connected in series; one end of the resistor R56 is connected with the first connecting point; one end of the resistor R60 is connected with a grounding connecting terminal; and the third connecting point is connected with one end of the resistor R60. A fourth connecting point is arranged between the resistor R56 and the resistor R60; and the fourth connecting point is connected with the ADC connecting terminal.

5. The on-board diagnostic circuit for an oil injector according to claim 4, characterized in that: The conduction driving circuit comprises a switching element, a resistor R53 and a resistor R54; one end of the resistor R53 is electrically connected with the second connecting point; the other end of the resistor R53 is electrically connected with the switching element; the switching element is connected with the third connecting point and one end of the resistor R54; and the other end of the resistor R54 is connected with the PB connecting terminal.

6. The on-board diagnostic circuit for an oil injector according to claim 5, characterized in that: The switching element is a switching triode Q1; the base of the switching triode Q1 is connected with one end of the resistor R54; the collector of the switching triode Q1 is connected with the other end of the resistor R53; and the emitter of the switching triode Q1 is connected with the third connecting point.

7. The on-board diagnostic circuit for an oil injector according to claim 5, characterized in that: The switch element is a MOS tube, one end of a resistor R54 is connected with the gate of the MOS tube, the other end of the resistor R53 is connected with the drain of the MOS tube, and the source of the MOS tube is connected with the third connection point.

8. The online diagnostic identification circuit for an oil jet according to any one of claims 6 or 7, characterized in that: A resistor R55 and a fifth connection point are arranged between the fourth connection point and the ADC connection end; the fifth connection point is provided with a capacitor C37 and a rectifier diode D15; The rectifier diode D15 is provided with a connection end one, which is used for connecting a 3.3V regulating voltage; The other end of the capacitor C37 is arranged at a ground end one.

9. The on-board diagnostic circuit for an oil injector according to claim 8, characterized in that: The micro processing chip MCU is further provided with an electric driving end and a data port.

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