CN212642935U - Internal combustion engine ignition determination system based on ion flow - Google Patents
Internal combustion engine ignition determination system based on ion flow Download PDFInfo
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- CN212642935U CN212642935U CN202021975933.XU CN202021975933U CN212642935U CN 212642935 U CN212642935 U CN 212642935U CN 202021975933 U CN202021975933 U CN 202021975933U CN 212642935 U CN212642935 U CN 212642935U
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Abstract
The utility model discloses an internal combustion engine ignition decision system based on ion flow, which comprises a processor, an ignition signal output circuit, a pre-drive circuit, a power drive circuit and an ignition coil, wherein the processor, the ignition signal output circuit, the pre-drive circuit, the power drive circuit and the ignition coil are sequentially connected in series; the ignition signal output circuit is used for outputting an ignition signal in real time according to the running condition of the internal combustion engine; the pre-driving circuit is used for amplifying the ignition signal so as to drive the power driving circuit to output; the power driving circuit is used for driving the ignition coil to realize ignition and combustion; the ignition state acquisition device is electrically connected with the processor. The method directly determines whether the cylinder is ignited or not by measuring the ionization energy of the ignition coil of the internal combustion engine, avoids adopting an indirect judgment method of transient rotating speed, and can realize real-time judgment.
Description
Technical Field
The utility model relates to an internal-combustion engine ignition decision system based on ion flow belongs to internal-combustion engine ignition situation monitoring technology field.
Background
Many motor vehicles utilize an internal combustion engine as a primary component of the propulsion device of the motor vehicle. Typically, the internal combustion engine is a multi-cylinder engine. During operation of the internal combustion engine, misfire conditions may occur in one or more cylinders, which reduces the power output and efficiency of the internal combustion engine. Pressure sensors may be used to detect pressure in each cylinder to monitor whether ignition and partial combustion are occurring in the cylinder. But the cost of the cylinder pressure sensor is quite high. In addition, whether the work of the cylinder is normal or not is calculated through the change of the transient rotating speed of each cylinder of the internal combustion engine, and then whether the cylinder is normally combusted is judged, however, the transient rotating speed of each cylinder of the internal combustion engine is greatly influenced by the change of working conditions and the vibration of the cylinder, the calculation process is very complicated, and the error rate is high. Thus, while current methods for detecting cylinder misfire achieve their intended purpose, there remains a need for a new and improved system for assessing cylinder firing conditions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an internal-combustion engine ignition decision system based on ion flow adopts the ignition condition that this system can real-time understanding internal-combustion engine, then judges whether motor vehicles's internal-combustion engine is normal operating.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an internal combustion engine ignition judging system based on ion flow comprises a processor, an ignition signal output circuit, a pre-driving circuit, a power driving circuit and an ignition coil, wherein the processor, the ignition signal output circuit, the pre-driving circuit, the power driving circuit and the ignition coil are sequentially connected in series; the ignition signal output circuit is used for outputting an ignition signal in real time according to the running condition of the internal combustion engine; the pre-driving circuit is used for amplifying the ignition signal so as to drive the power driving circuit to output; the power driving circuit is used for driving the ignition coil to realize ignition and combustion; the ignition state acquisition device is electrically connected with the processor.
In the foregoing internal combustion engine ignition determination system based on an ion flow, the ignition state acquisition device is an ion acquisition device, and the ion acquisition device is electrically connected to the processor and is configured to acquire an ion concentration of a fuel mixture gas in a cylinder.
In the ion current-based ignition determination system for the internal combustion engine, the ignition state acquisition device is a current acquisition device, an acquisition end of the current acquisition device is electrically connected with the ignition coil, and an output end of the current acquisition device is electrically connected with the processor and is used for acquiring the input current of the ignition coil.
Compared with the prior art, the utility model discloses a system can real-time understanding the ignition condition of internal-combustion engine, then judges whether motor vehicle's internal-combustion engine is normal operating. The method directly determines whether the cylinder is ignited or not by measuring the ionization energy of the ignition coil of the internal combustion engine, avoids adopting an indirect judgment method of transient rotating speed, and can realize real-time judgment. While current sensors (e.g., sampling resistors) are less expensive than cylinder pressure or torque sensors. This flow enables the driver of the motor vehicle or the serviceman of the motor vehicle to easily judge whether the internal combustion engine of the motor vehicle is operating normally.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of another embodiment of the present invention.
Reference numerals: 1-an ion acquisition device, 2-a processor, 3-an ignition signal output circuit, 4-a pre-drive circuit, 5-a power drive circuit, 6-an ignition coil and 7-a current acquisition device.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
Embodiment 1 of the utility model: an internal combustion engine ignition judging system based on ion flow comprises a processor 2, an ignition signal output circuit 3, a pre-drive circuit 4, a power drive circuit 5 and an ignition coil 6, wherein the processor 2, the ignition signal output circuit 3, the pre-drive circuit 4, the power drive circuit 5 and the ignition coil 6 are sequentially connected in series; the ignition signal output circuit 3 is used for outputting an ignition signal in real time according to the running condition of the internal combustion engine; the pre-driving circuit 4 is used for amplifying the ignition signal to drive the power driving circuit 5 to output; the power driving circuit 5 is used for driving the ignition coil 6 to realize ignition and combustion; the ignition device further comprises an ignition state acquisition device, and the ignition state acquisition device is electrically connected with the processor 2.
The ignition state acquisition device is a current acquisition device 7, the acquisition end of the current acquisition device 7 is electrically connected with the ignition coil 6, and the output end of the current acquisition device is electrically connected with the processor 2 and used for acquiring the input current of the ignition coil 6.
The determination procedure of example 1 is as follows: s100: collecting the ionization degree of the fuel mixed gas in the cylinder under the condition of normal ignition for a plurality of times, and determining a threshold range according to the maximum value and the minimum value of the ionization degree of the fuel mixed gas in the cylinder under the condition of normal ignition; s200: acquiring the ionization degree of fuel mixed gas in a cylinder of the internal combustion engine in real time; s300: and if the ionization degree of the fuel mixture gas in the cylinder after single ignition is within the threshold value range, judging that the ignition belongs to normal ignition, and if not, judging that the ignition belongs to abnormal ignition. The method for acquiring the ionization degree of the fuel mixture gas in the cylinder comprises the following steps: the discharge time of the spark plug is collected, and the longer the discharge time of the spark plug is, the longer the ionization time of the fuel-air mixture in the cylinder is, the more the ions of the fuel-air mixture are generated, and the higher the ionization degree of the fuel-air mixture is.
Example 2: an internal combustion engine ignition judging system based on ion flow comprises a processor 2, an ignition signal output circuit 3, a pre-drive circuit 4, a power drive circuit 5 and an ignition coil 6, wherein the processor 2, the ignition signal output circuit 3, the pre-drive circuit 4, the power drive circuit 5 and the ignition coil 6 are sequentially connected in series; the ignition signal output circuit 3 is used for outputting an ignition signal in real time according to the running condition of the internal combustion engine; the pre-driving circuit 4 is used for amplifying the ignition signal to drive the power driving circuit 5 to output; the power driving circuit 5 is used for driving the ignition coil 6 to realize ignition and combustion; the ignition device further comprises an ignition state acquisition device, and the ignition state acquisition device is electrically connected with the processor 2.
The ignition state acquisition device is an ion acquisition device 1, and the ion acquisition device 1 is electrically connected with the processor 2 and is used for acquiring the ion concentration of the fuel mixed gas in the cylinder. The ion collecting device 1 may be an ion concentration measuring circuit and an ion current sensor disclosed in chinese patent application No. 201010155420.9.
The determination procedure of example 2 is as follows: s100: collecting the ionization degree of the fuel mixed gas in the cylinder under the condition of normal ignition for a plurality of times, and determining a threshold range according to the maximum value and the minimum value of the ionization degree of the fuel mixed gas in the cylinder under the condition of normal ignition; s200: acquiring the ionization degree of fuel mixed gas in a cylinder of the internal combustion engine in real time; s300: and if the ionization degree of the fuel mixture gas in the cylinder after single ignition is within the threshold value range, judging that the ignition belongs to normal ignition, and if not, judging that the ignition belongs to abnormal ignition. The method for acquiring the ionization degree of the fuel mixture gas in the cylinder comprises the following steps: establishing a coordinate system by taking time as an abscissa and ion concentration of the fuel mixed gas as an ordinate; the ion concentration of the fuel mixed gas in the cylinder is acquired in real time through the ion acquisition device, the area of a waveform in single ignition time is calculated, and the larger the area of the waveform in the single ignition time is, the higher the ionization degree of the fuel mixed gas is.
Claims (3)
1. An internal combustion engine ignition determination system based on ion flow comprises a processor (2), an ignition signal output circuit (3), a pre-drive circuit (4), a power drive circuit (5) and an ignition coil (6), wherein the processor (2), the ignition signal output circuit (3), the pre-drive circuit (4), the power drive circuit (5) and the ignition coil (6) are sequentially connected in series; the ignition signal output circuit (3) is used for outputting an ignition signal in real time according to the running condition of the internal combustion engine; the pre-drive circuit (4) is used for amplifying the ignition signal so as to drive the power drive circuit (5) to output; the power driving circuit (5) is used for driving the ignition coil (6) to realize ignition and combustion; the ignition system is characterized by further comprising an ignition state acquisition device, wherein the ignition state acquisition device is electrically connected with the processor (2).
2. An ion current based ignition determination system for an internal combustion engine according to claim 1, wherein the ignition state acquisition means is an ion acquisition means (1), and the ion acquisition means (1) is electrically connected to the processor (2) for acquiring the ion concentration of the fuel mixture gas in the cylinder.
3. An ion current based ignition decision system for an internal combustion engine according to claim 1, wherein the ignition state collecting means is a current collecting means (7), the collecting terminal of the current collecting means (7) is electrically connected to the ignition coil (6), and the output terminal of the current collecting means (7) is electrically connected to the processor (2) for collecting the input current of the ignition coil (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021975933.XU CN212642935U (en) | 2020-09-10 | 2020-09-10 | Internal combustion engine ignition determination system based on ion flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021975933.XU CN212642935U (en) | 2020-09-10 | 2020-09-10 | Internal combustion engine ignition determination system based on ion flow |
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| CN212642935U true CN212642935U (en) | 2021-03-02 |
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