CN219974638U - Variable valve electric control device and gas engine - Google Patents
Variable valve electric control device and gas engine Download PDFInfo
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- CN219974638U CN219974638U CN202321484904.7U CN202321484904U CN219974638U CN 219974638 U CN219974638 U CN 219974638U CN 202321484904 U CN202321484904 U CN 202321484904U CN 219974638 U CN219974638 U CN 219974638U
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- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a variable valve electric control device and a gas engine, wherein the electric control device comprises a control unit and a communication unit, the communication unit is in communication connection with the engine electric control unit, and the variable valve electric control device also comprises a plurality of position detection units and a plurality of driving units, wherein the position detection units and the driving units are arranged one by one with cylinders of the engine; each position detection unit is electrically connected with the control unit, and is used for detecting a real-time position signal of the cylinder where the position detection unit is located and transmitting the real-time position signal to the control unit; each driving unit is electrically connected with the control unit and is used for driving the valve mechanical structure of the cylinder to move. Therefore, each cylinder is provided with a position detection unit and a driving unit, so that the valve of each cylinder can be independently connected to be larger or smaller, the gas engine can obtain the required air-fuel ratio, and the output power of the engine is matched with the current working condition.
Description
Technical Field
The utility model relates to the technical field of gas engines, in particular to a variable valve electric control device and a gas engine.
Background
At present, the variable valve technology on a gas engine is mature day by day, and the main technical direction is to realize the control of the variable lift of the valve by using an electric control technology.
The gas engine requires air-fuel ratio control, and the control air-fuel ratio range at the time of lean combustion is: lambda is more than or equal to 1.0 and less than or equal to 1.5, and the combustion economy is better. An air-fuel ratio outside this range may cause unstable combustion, thereby making the engine output unstable, for example: air-fuel ratio < 1.0, or air-fuel ratio greater than 1.6.
In the complex and changeable working condition of the gas engine, the opening degree of the variable valve needs to be changed in real time to adjust the air inflow of each cylinder, and then the gas injection quantity of each cylinder is matched according to the air inflow, so that the air-fuel ratio is ensured to be in a reasonable range, and the output power of the engine is matched with the current working condition.
However, in the variable valve electric control device in the prior art, most of the variable valve electric control device adopts a mode of uniform detection and uniform control of valves of all cylinders, and the valve continuous change of each cylinder cannot be controlled independently, so that the output power of an engine cannot be completely matched with the current working condition.
Disclosure of Invention
Aiming at the defects, the technical problems to be solved by the utility model are as follows: the variable valve electric control device and the gas engine can independently drive the variable valve mechanical structure of each cylinder, so that the valve of each cylinder can be controlled to be independently and continuously increased or continuously decreased, and the output power of the engine is matched with the current working condition.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the variable valve electric control device comprises a control unit and a communication unit electrically connected with the control unit, wherein the communication unit is in communication connection with an engine electric control unit, the engine electric control unit transmits control signals corresponding to variable valve lift to the control unit through the communication unit, the electric control device further comprises a plurality of position detection units and a plurality of driving units, the position detection units are arranged one by one with cylinders of an engine, and the driving units are arranged one by one with the cylinders of the engine; each position detection unit is electrically connected with the control unit, and is used for detecting a real-time position signal of a cylinder where the position detection unit is located and transmitting the real-time position signal to the control unit; each driving unit is electrically connected with the control unit and is used for driving the valve mechanical structure of the cylinder to move; the control unit is used for controlling the corresponding driving unit according to the control signals transmitted by the engine electronic control unit and the real-time position signals transmitted by each position detection unit.
Preferably, a position detection interface is connected in series between each position detection unit and each control unit.
Preferably, a driving interface is connected in series between each driving unit and each control unit.
Preferably, the communication unit comprises a CAN communication circuit and a CAN bus interface which are electrically connected, the CAN bus interface is in communication connection with the engine electronic control unit through a CAN bus, and the CAN communication circuit is electrically connected with the control unit.
Preferably, the electric control device further comprises a phase signal acquisition unit, and the phase signal acquisition unit is electrically connected with the control unit.
Preferably, each of the driving units includes a stepping motor driving circuit.
A gas engine comprises a variable valve lift mechanism and the variable valve electric control device.
After the technical scheme is adopted, the utility model has the beneficial effects that:
because the variable valve electric control device and the gas engine provided by the utility model, wherein the electric control device comprises a control unit and a communication unit electrically connected with the control unit, the communication unit is in communication connection with the engine electric control unit, the engine electric control unit transmits control signals corresponding to the variable valve lift to the control unit through the communication unit, the electric control device also comprises a plurality of position detection units and a plurality of driving units, the position detection units are arranged one by one with cylinders of the engine, and the driving units are arranged one by one with the cylinders of the engine; each position detection unit is electrically connected with the control unit, and is used for detecting a real-time position signal of the cylinder where the position detection unit is located and transmitting the real-time position signal to the control unit; each driving unit is electrically connected with the control unit and is used for driving the valve mechanical structure of the cylinder to move; the control unit is used for controlling the corresponding driving unit according to the control signals transmitted by the engine electronic control unit and the real-time position signals transmitted by each position detection unit. As can be seen from the above, each cylinder is provided with a position detection unit and a driving unit, so that the valve of each cylinder can be independently connected to be larger or smaller.
Drawings
FIG. 1 is a schematic block diagram of a variable valve control apparatus of the present utility model;
FIG. 2 is a schematic diagram of a control unit pin in the present utility model;
FIG. 3 is a schematic diagram of the pins of the stepper motor driver circuit of the present utility model;
FIG. 4 is a schematic diagram of a pin of a position detecting unit in the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Embodiment one:
as shown in fig. 1, the variable valve electric control device comprises a control unit and a communication unit electrically connected with the control unit, wherein the communication unit is in communication connection with an engine electric control unit, and the engine electric control unit transmits a control signal corresponding to a variable valve lift to the control unit through the communication unit.
As shown in fig. 2, in a preferred embodiment, the communication unit includes a CAN communication circuit and a CAN bus interface that are electrically connected, and the CAN bus interface is communicatively connected to the engine electronic control unit through a CAN bus, and the CAN communication circuit is electrically connected to the control unit. In this embodiment, the control unit includes a main control chip U1, where the main control chip U1 may be a DSP chip, and the chip model may be TMS320F28335. Specifically, the pin GPIO18 of the main control chip U1 is electrically connected to the pin can_rx of the CAN communication circuit, and the pin GPIO19 of the main control chip U1 is electrically connected to the pin can_tx of the CAN communication circuit, so as to perform communication.
As shown in fig. 1, the electric control device further comprises a plurality of position detection units and a plurality of driving units, wherein the position detection units are arranged one by one with the cylinders of the engine, and the driving units are arranged one by one with the cylinders of the engine; in this embodiment, the gas engine includes six cylinders, and the present electronic control device is provided with six position detecting units and six driving units.
Each position detection unit is electrically connected with the control unit, and is used for detecting a real-time position signal when the cylinder is driven and transmitting the real-time position signal to the control unit; in one preferred scheme, a position detection interface is connected in series between each position detection unit and the control unit, and independent control can be conveniently carried out through the position detection interface. Each position detection unit comprises an MLX90365 chip, as shown in fig. 4, the specific connection mode of the position detection unit and the control unit is as follows: taking the position detection unit on the valve 1 as an example, the power end VDD of the position detection unit U3 on the valve 1 is connected with +5v, the grounding ends VSS and VDIG are simultaneously grounded GND, the output end OUT is connected with the pin adcin 0 (posi_adc1) of the control unit through a resistor, the output end of the position detection unit on the valve 2 is connected with the pin adcin 1 (posi_adc2) of the control unit through a resistor, the output end of the position detection unit on the valve 3 is connected with the pin adcin 2 (posi_adc3) of the control unit through a resistor, the output end of the position detection unit on the valve 4 is connected with the pin adcin 3 (posi_adc 4) of the control unit through a resistor, and the output end of the position detection unit on the valve 6 is connected with the pin adcin 5 (posi_adc 6) of the control unit through a resistor.
Each driving unit is electrically connected with the control unit and is used for driving the valve mechanical structure of the cylinder to move; in one preferred scheme, a driving interface is connected in series between each driving unit and each control unit, and independent control is conveniently carried out through the driving interfaces. Each driving unit comprises a stepping motor driving circuit, a motor driving chip of the stepping motor driving circuit selects a DRV8824Q stepping motor driving chip, and as shown in fig. 3, the specific connection mode of the driving unit and the control unit is as follows: taking the valve 1 up-driving as an example, the ground end GND of the driving unit U2 on the valve 1 is grounded PGND, the power supply end VMA and the power supply end VMB are respectively connected with +12v, the nHOME end (STEP nHOME 1) of the driving unit U2 is connected with the pin GPIO79 of the control unit, the MODE1 end (STEP MODE 1) of the driving unit U2 is connected with the pin GPIO78 of the control unit, the STEP end (STEP 1) of the driving unit U2 is connected with the pin GPIO77 of the control unit, the nENBL end (STEP nENBL 1) of the driving unit U2 is connected with the pin GPIO76 of the control unit, the DIR end (STEP DIR 1) of the driving unit U2 is connected with the pin GPIO75 of the control unit, and the DECAY end (STEP DECAY 1) of the driving unit U2 is connected with the pin GPIO74 of the control unit.
As shown IN fig. 1, the electric control device IN this embodiment further includes a phase signal acquisition unit, where the phase signal acquisition unit is electrically connected to the control unit, specifically, an output end hall_in of the phase signal acquisition unit is electrically connected to a pin GPIO50 of the control unit, and the state of each cylinder can be known IN real time through the phase signal acquisition unit, so that the control unit combines with the phase signal to control the driving unit.
As shown in fig. 1 to fig. 4 together, when the variable valve electric control device of the utility model works, an engine electric control unit comprehensively obtains the air intake needed by an engine according to the working conditions of the current engine, such as the parameters of engine speed, water temperature, boost pressure, torque and the like, converts the air intake into a variable valve lift, and sends the variable valve lift to a control unit of the electric control device through a CAN bus; and meanwhile, the control unit controls the driving unit on each cylinder to drive the mechanical structure of the valve according to the position detection signal transmitted by the position detection unit on each cylinder, so that each valve is adjusted according to the actual position and the target position, the required air-fuel ratio is obtained, and the output power of the engine is matched with the current working condition.
Because each valve is provided with a position detection unit and a driving unit, each valve can be continuously enlarged or continuously reduced, namely, the lift of the variable valve is driven to change through the driving unit on each valve, and the actual air inflow is adjusted to be equal to the target air inflow value through a dynamic process;
embodiment two:
a gas engine comprises a variable valve lift mechanism and the variable valve electric control device.
The variable valve electric control device adopted by the gas engine in the embodiment can independently control the continuous enlargement or continuous reduction of the valve of each cylinder, so that each cylinder can obtain the required air-fuel ratio, and the output power of the engine is matched with the current working condition.
The above description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the utility model, and any modifications, equivalent to a variable valve electric control device and gas engine modification, etc. within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The variable valve electric control device comprises a control unit and a communication unit electrically connected with the control unit, wherein the communication unit is in communication connection with an engine electric control unit, and the engine electric control unit transmits control signals corresponding to variable valve lift to the control unit through the communication unit;
each position detection unit is electrically connected with the control unit, and is used for detecting a real-time position signal of a cylinder where the position detection unit is located and transmitting the real-time position signal to the control unit;
each driving unit is electrically connected with the control unit and is used for driving the valve mechanical structure of the cylinder to move;
the control unit is used for controlling the corresponding driving unit according to the control signals transmitted by the engine electronic control unit and the real-time position signals transmitted by each position detection unit.
2. The variable valve control device according to claim 1, wherein a position detection interface is connected in series between each of the position detection units and the control unit.
3. The variable valve control device according to claim 1, wherein a driving interface is connected in series between each of the driving units and the control unit.
4. The variable valve control device according to claim 1, wherein the communication unit includes a CAN communication circuit and a CAN bus interface that are electrically connected, the CAN bus interface being communicatively connected to the engine control unit via a CAN bus, the CAN communication circuit being electrically connected to the control unit.
5. A variable valve control apparatus according to any one of claims 1 to 4, further comprising a phase signal acquisition unit electrically connected to the control unit.
6. A variable valve control apparatus according to claim 1, wherein each of the driving units includes a stepping motor driving circuit.
7. A gas engine comprising a variable valve lift mechanism and the variable valve electric control apparatus according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321484904.7U CN219974638U (en) | 2023-06-12 | 2023-06-12 | Variable valve electric control device and gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321484904.7U CN219974638U (en) | 2023-06-12 | 2023-06-12 | Variable valve electric control device and gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974638U true CN219974638U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321484904.7U Active CN219974638U (en) | 2023-06-12 | 2023-06-12 | Variable valve electric control device and gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974638U (en) |
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2023
- 2023-06-12 CN CN202321484904.7U patent/CN219974638U/en active Active
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