CN212615041U - Engine EPG valve control system - Google Patents
Engine EPG valve control system Download PDFInfo
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- CN212615041U CN212615041U CN202021692402.XU CN202021692402U CN212615041U CN 212615041 U CN212615041 U CN 212615041U CN 202021692402 U CN202021692402 U CN 202021692402U CN 212615041 U CN212615041 U CN 212615041U
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- air pressure
- engine
- epg
- pressure sensor
- control system
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Abstract
The utility model provides an engine EPG valve control system belongs to engine EPG valve technical field. The problem that the precision of an existing engine EPG valve control system is not high enough is solved. The engine EPG valve control system comprises an air pressure sensor and a single chip microcomputer connected with the air pressure sensor, wherein the air pressure sensor is connected with a zero setting circuit, and the air pressure sensor is also connected with a constant current power supply. The utility model has the advantages of measurement accuracy is high.
Description
Technical Field
The utility model belongs to the technical field of engine EPG valve, a engine EPG valve control system is related to.
Background
Engine brakes comprising a compression brake and an exhaust gas pressure regulator (EPG) are known, which close a cylinder valve causing internal compression of the air therein, thereby generating a braking torque.
For example, chinese patent literature discloses a method of controlling an engine brake of a vehicle and an engine brake system [ application No.: 201280072633.2, respectively; authorization notice number: CN104364498B ], vehicle provided with an internal combustion engine comprising a cylinder, an exhaust gas pressure regulator (EPG) regulating the air flow out of the cylinder, an inlet air throttle valve regulating the air flow into the cylinder, and a pressure sensing means for sensing the pressure downstream of the cylinder, the engine braking torque being regulated into two different engine braking modes.
The waste gas pressure regulator (EPG) in the patent is an engine EPG valve, which consists of a valve body, a proportional electromagnetic valve and a control board, wherein the control board is used for controlling the current of the proportional electromagnetic valve according to the pulse width of PWM (pulse width modulation) provided by an ECU (electronic control Unit), and further controlling the output air pressure to meet the requirement of the system through the proportional electromagnetic valve, wherein the pulse width of the PWM corresponds to the output air pressure, so that the monitoring is realized through a pressure sensing device. The pressure sensing device is arranged on the control panel and consists of an air pressure sensor and a single chip microcomputer, the air pressure sensor is used for sensing the downstream air pressure of the air cylinder and transmitting an air pressure signal to the single chip microcomputer for processing, and the single chip microcomputer transmits a processing signal to the ECU so as to realize monitoring. But the measurement accuracy of the air pressure sensor is still not ideal.
Disclosure of Invention
The utility model aims at the above-mentioned problem that exists among the prior art, provide an engine EPG valve control system that measurement accuracy is high.
The purpose of the utility model can be realized by the following technical proposal: an engine EPG valve control system comprises an air pressure sensor and a single chip microcomputer connected with the air pressure sensor, and is characterized in that the air pressure sensor is connected with a zero setting circuit and a constant current power supply source.
In the EPG valve control system for the engine, the zero setting circuit includes a zero setting resistor, and the zero setting resistor is connected in series to a bridge arm of the air pressure sensor.
In the EPG valve control system of the engine, the air pressure sensor is coupled to a temperature compensation circuit.
In the above EPG valve control system of the engine, the air pressure sensor is coupled to the single chip microcomputer through a signal amplifying circuit.
Compared with the prior art, the engine EPG valve control system has the advantages of low manufacturing cost, high measurement precision and good use effect.
Drawings
FIG. 1 is a schematic diagram of the present engine EPG valve control system.
Fig. 2 is a schematic diagram of a zeroing circuit in the present engine EPG valve control system.
In the figure, 1, an air pressure sensor; 2. a single chip microcomputer; 3. a zero setting circuit; 31. zeroing the resistor; 32. a bridge arm; 4. a constant current power supply source; 5. a temperature compensation circuit; 6. a signal amplifying circuit.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in figure 1, the engine EPG valve control system comprises an air pressure sensor 1 and a singlechip 2 connected with the air pressure sensor 1, wherein the air pressure sensor 1 is connected with a zero setting circuit 3, and the air pressure sensor 1 is also connected with a constant current power supply 4.
The engine EPG valve control system replaces the original constant-voltage power supply circuit with the constant-current power supply 4, improves the measurement and output precision of the air pressure sensor 1, enables the bridge of the air pressure sensor 1 to be balanced by the zero setting circuit 3, and eliminates the measurement precision error caused by the resistance error of the bridge arm 32.
To put it more concretely, as shown in fig. 2, the zero setting circuit 3 includes a zero setting resistor 31, and the zero setting resistor 31 is connected in series to a bridge arm 32 included in the air pressure sensor 1. In this embodiment, the baroceptor 1 is a GZP160 baroceptor produced by tin-free production, the GZP160 baroceptor has four bridge arms 32, the zero setting resistors 31 are connected in series between two adjacent bridge arms 32, and the zero setting resistors 31 adjust resistance errors between the resistors on the four bridge arms 32, so that the whole bridge is balanced in use, and measurement accuracy errors caused by the resistance errors of the bridge arms 32 are eliminated.
The air pressure sensor 1 is connected with a temperature compensation circuit 5, the temperature compensation circuit 5 is the prior art, and can compensate errors of a measurement structure caused by different temperatures, so that the measurement precision is improved; the air pressure sensor 1 is connected to the single chip microcomputer 2 through the signal amplification circuit 6, the signal amplification circuit 6 is in the prior art, weak voltage signals of the air pressure sensor 1 are amplified to direct current signals capable of being processed by the single chip microcomputer 2, and the measurement accuracy of the single chip microcomputer 2 is improved.
Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. An engine EPG valve control system comprises an air pressure sensor (1) and a singlechip (2) connected with the air pressure sensor (1), and is characterized in that the air pressure sensor (1) is connected with a zero setting circuit (3), and the air pressure sensor (1) is also connected with a constant current power supply (4).
2. An engine EPG valve control system according to claim 1, characterized in that the zero setting circuit (3) comprises a zero setting resistor (31), and the zero setting resistor (31) is connected in series to a bridge arm (32) of the air pressure sensor (1).
3. An engine EPG valve control system according to claim 2, characterized in that a temperature compensation circuit (5) is coupled to the air pressure sensor (1).
4. An engine EPG valve control system according to claim 3, wherein the air pressure sensor (1) is connected to the single chip microcomputer (2) through a signal amplifying circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021692402.XU CN212615041U (en) | 2020-08-14 | 2020-08-14 | Engine EPG valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021692402.XU CN212615041U (en) | 2020-08-14 | 2020-08-14 | Engine EPG valve control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212615041U true CN212615041U (en) | 2021-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021692402.XU Active CN212615041U (en) | 2020-08-14 | 2020-08-14 | Engine EPG valve control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212615041U (en) |
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2020
- 2020-08-14 CN CN202021692402.XU patent/CN212615041U/en active Active
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