CN217462379U - In-cylinder brake power boosting system of gas engine - Google Patents
In-cylinder brake power boosting system of gas engine Download PDFInfo
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- CN217462379U CN217462379U CN202220909512.XU CN202220909512U CN217462379U CN 217462379 U CN217462379 U CN 217462379U CN 202220909512 U CN202220909512 U CN 202220909512U CN 217462379 U CN217462379 U CN 217462379U
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Abstract
The utility model discloses a braking power lift system in gas engine jar, include: the air storage tank is communicated with an air outlet of the air compressor; the nozzle of the air supply pipe extends into the air inlet manifold and is arranged close to the air inlet valve, the air supply pipe is communicated with the air storage tank, and the air supply pipe is provided with an electric control valve; an in-cylinder brake solenoid valve mounted on the cylinder block; a camshaft phase sensor mounted on the camshaft; the control unit, the electric control valve, the in-cylinder brake solenoid valve and the camshaft phase sensor are respectively and electrically connected with the control unit. According to the application, under the condition that the original structure of the engine valve mechanism is not changed, the air input of each cycle is increased through the air supplementing system, so that the purpose of improving the braking power in a cylinder of the natural gas engine is achieved, and the defect that the compression ratio of the gas engine is reduced due to knocking limitation is overcome.
Description
Technical Field
The utility model relates to a gas engine technical field, specific theory relates to a braking power lift system in gas engine jar.
Background
At present, heavy engines are equipped with auxiliary braking systems, which mainly function to reduce the speed of the automobile or maintain a certain speed under the condition that the automobile does not use or uses little wheel hubs for braking, the current domestic engine auxiliary braking system is in-cylinder compression release braking (in-cylinder braking), and the principle is that at the end of the compression stroke of the engine, an exhaust valve is forcibly opened, compressed air is released to an exhaust pipe, so that the engine braking effect is achieved, and under the condition of a certain structure of an engine distribution system, the braking power mainly depends on the compression ratio of the engine and the air inflow in the cylinder of each cycle.
However, for a heavy natural gas engine, because of the limitation of knocking, the compression of the heavy natural gas engine is smaller than that of a diesel engine with the same displacement, so that the braking power of the heavy natural gas engine is smaller, the vehicle braking effect is poor, and the user experience is poor.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: provided is a gas engine in-cylinder brake power boosting system capable of effectively boosting in-cylinder brake power.
In order to solve the technical problem, the technical scheme of the utility model is that:
a gas engine in-cylinder brake power boost system, comprising: the air storage tank is communicated with an air outlet of the air compressor;
the nozzle of the air supplementing pipe extends into the air inlet manifold and is arranged close to the air inlet valve, the air supplementing pipe is communicated with the air storage tank, and the air supplementing pipe is provided with an electric control valve;
an in-cylinder brake solenoid valve mounted on the cylinder block;
a camshaft phase sensor mounted on the camshaft;
and the electric control valve, the in-cylinder brake solenoid valve and the camshaft phase sensor are respectively electrically connected with the control unit.
Preferably, the electrically controlled valve is an electrically controlled injection valve.
Preferably, the air supply pipe is provided with a pressure maintaining valve, and the pressure maintaining valve is positioned at the upstream of the electric control valve.
Preferably, the air storage tank is provided with a pressure relief valve.
Preferably, the pressure relief valve is communicated with an unloading joint of the air compressor.
Preferably, the control unit is an ECU or a controller communicatively connected with the ECU.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
under the condition of not changing the original structure of the engine valve mechanism, the air supply system is used for increasing the air input of each cycle, so that the purpose of improving the braking power in a cylinder of the natural gas engine is achieved, and the defect that the compression ratio of the gas engine is reduced due to knock limitation is overcome.
The air outlet of the air supply pipe is arranged close to the air inlet valve, and the electric control injection valve is only opened in the air suction stroke, so that the surge of the supercharger is effectively avoided under the condition of full air supply.
Drawings
FIG. 1 is a control schematic diagram of the in-cylinder brake power boost system of the present invention;
FIG. 2 is a flow chart of a method of controlling the in-cylinder brake power boost system of the present invention;
in the figure: 1. an ECU; 2. a camshaft phase sensor; 3. a camshaft mechanism; 4. a gas supplementing pipe; 5. an in-cylinder brake solenoid valve; 6. a cylinder block; 7. a piston; 8. a crank link mechanism; 9. an air compressor; 10. a pressure relief valve; 11. a gas storage tank; 12. a pressure maintaining valve; 13. an electrically controlled injection valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a gas engine in-cylinder brake power boosting system includes:
an air storage tank 11 communicated with an air outlet of the air compressor 9;
the nozzle of the air supply pipe 4 extends into the air inlet manifold and is arranged close to the air inlet valve, the air supply pipe 4 is communicated with the air storage tank 11, and the air supply pipe 4 is provided with an electric control valve;
the in-cylinder brake solenoid valve 5 is arranged on the cylinder body 6, and the control unit monitors the working state of the in-cylinder brake solenoid valve 5 in real time;
the camshaft phase sensor 2 is arranged on the camshaft mechanism 3, and the camshaft phase sensor 2 acquires a position signal of the camshaft in real time and sends the position signal to the control unit;
the control unit, the electric control valve, the in-cylinder brake solenoid valve 5 and the camshaft phase sensor 2 are respectively and electrically connected with the control unit.
The electronic control valve is used to control the make-and-break of the air supply pipe 4, in this embodiment, the electronic control valve is preferably an electronic control injection valve 13, and the control unit controls the opening and closing of the electronic control injection valve 13 and the injection time.
The air supply pipe 4 is provided with a pressure maintaining valve 12, and the pressure maintaining valve 12 is positioned at the upstream of the electric control injection valve 13 and used for reducing the pressure of the compressed air released by the air storage tank 11 to the air supply pipe 4 and stabilizing the pressure at a set pressure value.
The air compressor 9 is driven by the crank link mechanism 8, the generated compressed air is conveyed to the air storage tank 11 through a pipeline, the air storage tank 11 is provided with a pressure release valve 10, when the pressure of the air storage tank 11 reaches the opening pressure of the pressure release valve 10, the pressure release valve 10 is opened, the compressed air in the air storage tank 11 is conveyed to the unloading joint of the air compressor 9 through the pipeline, the inflating action of the air compressor 9 is blocked, and the energy-saving purpose is achieved.
The control unit is the ECU1 or a controller communicatively connected to the ECU 1.
Be applicable to foretell gas engine in-cylinder brake power lift system mutually, the utility model also provides a gas engine in-cylinder brake power lift system's control method.
As shown in fig. 2, the method includes:
s1, the control unit acquires the camshaft position information acquired by the current camshaft phase sensor 2 and the working state of the in-cylinder brake solenoid valve 5;
s2, the control unit judges whether the in-cylinder brake solenoid valve 5 acts, if the in-cylinder brake solenoid valve 5 acts, the control unit judges that the in-cylinder brake is opened, S3 is executed, otherwise, S1 is executed;
s3, the control unit judges whether the intake valve is opened or not according to the camshaft position signal collected by the camshaft phase sensor 2, if so, S4 is executed, otherwise, S2 is executed;
s4, the control unit electrically controls the injection valve 13 to open, the compressed gas in the gas storage tank 11 is injected into the cylinder, and the air input per cycle is increased when the cylinder is braked, so that the purpose of increasing the braking power in the cylinder of the gas engine is achieved, and the defect that the compression ratio is limited is overcome.
Because the nozzle of the air supply pipe 4 is close to the inlet valve, and the electric control injection valve 13 is opened only in the air suction stroke, the piston 7 generates strong suction force in the air suction stroke, the compressed air injected into the cylinder by the air supply pipe 4 is directly sucked away by the suction force, and the compressed air cannot flow to the supercharger, thereby effectively avoiding the surging of the supercharger under the condition of full air supply.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (6)
1. Gas engine in-cylinder brake power boost system characterized by, includes:
the air storage tank is communicated with an air outlet of the air compressor;
the nozzle of the air supplementing pipe extends into the air inlet manifold and is arranged close to the air inlet valve, the air supplementing pipe is communicated with the air storage tank, and the air supplementing pipe is provided with an electric control valve;
an in-cylinder brake solenoid valve mounted on the cylinder block;
a camshaft phase sensor mounted on the camshaft;
and the electric control valve, the in-cylinder brake solenoid valve and the camshaft phase sensor are respectively electrically connected with the control unit.
2. The gas engine in-cylinder brake power boost system of claim 1, wherein said electrically controlled valve is an electrically controlled injection valve.
3. The gas engine in-cylinder brake power boosting system according to claim 1, wherein the air supply pipe is provided with a pressure maintaining valve, and the pressure maintaining valve is located upstream of the electric control valve.
4. The gas engine in-cylinder brake power boost system of claim 1, wherein said air reservoir is provided with a pressure relief valve.
5. The gas engine in-cylinder brake power boost system of claim 4, wherein said pressure relief valve is in communication with an unloading joint of said air compressor.
6. The gas engine in-cylinder brake power boost system of claim 1, wherein said control unit is an ECU or a controller communicatively connected to an ECU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220909512.XU CN217462379U (en) | 2022-04-19 | 2022-04-19 | In-cylinder brake power boosting system of gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220909512.XU CN217462379U (en) | 2022-04-19 | 2022-04-19 | In-cylinder brake power boosting system of gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217462379U true CN217462379U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220909512.XU Active CN217462379U (en) | 2022-04-19 | 2022-04-19 | In-cylinder brake power boosting system of gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217462379U (en) |
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2022
- 2022-04-19 CN CN202220909512.XU patent/CN217462379U/en active Active
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