CN217270417U - Natural gas engine, vehicle and ship - Google Patents
Natural gas engine, vehicle and ship Download PDFInfo
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- CN217270417U CN217270417U CN202123297766.5U CN202123297766U CN217270417U CN 217270417 U CN217270417 U CN 217270417U CN 202123297766 U CN202123297766 U CN 202123297766U CN 217270417 U CN217270417 U CN 217270417U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model relates to a natural gas engine and vehicle, boats and ships belong to engine technical field, have solved the problem that natural gas engine starts the difficulty, including the blast pipe, the blast pipe is connected with the detection pipeline, detects the pipeline and installs automatically controlled ooff valve, and negative-pressure air fan and gas detecting element are installed to the pipeline section between the end of giving vent to anger and the automatically controlled ooff valve of detection pipeline, adopt the utility model discloses a natural gas engine can detect the combustible gas in cylinder and the blast pipe, has avoided starting difficulty and blast pipe phenomenon of blasting.
Description
Technical Field
The utility model relates to the technical field of engines, concretely relates to natural gas engine and vehicle, boats and ships.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The inventor finds that after the natural gas engine is stopped for a long time, if a gas system is not tightly sealed, part of natural gas can be gathered in an air inlet and exhaust system of the engine, and when the natural gas engine is started for the first time, if the gas in a cylinder is too rich and exceeds the ignition range of the natural gas, the engine can be difficult to start. Meanwhile, when the natural gas engine is not started successfully, the injected combustible mixed gas enters the engine cylinder and the exhaust pipe unburnt due to the failed starting, and the starting is still difficult in the next starting, and the situations of gas afterburning and exhaust pipe blasting can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned prior art, providing a natural gas engine, can judge before the engine starts whether contain combustible gas mixture in the exhaust manifold of engine, avoid starting the problem of difficulty.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, an embodiment of the utility model provides a natural gas engine, including the blast pipe, the blast pipe is connected with the detection pipeline, detects the pipeline and installs electrical switch valve, and negative-pressure air fan and gas detecting element are installed to the pipeline section between the end of giving vent to anger and the electrical switch valve of detection pipeline.
Optionally, the negative pressure fan is disposed close to the electrically controlled switch valve, and a pipe section between the air outlet end of the detection pipeline and the negative pressure fan is provided with a check valve allowing air to flow only from the air inlet end to the air outlet end of the detection pipeline.
Optionally, the gas detection element is disposed close to the electrically controlled switch valve, and a pipe section between the air outlet end of the detection pipeline and the negative pressure fan is provided with a check valve allowing gas to flow only from the air inlet end to the air outlet end of the detection pipeline.
In a second aspect, embodiments of the present invention provide a vehicle provided with the natural gas engine of the first aspect.
In a third aspect, embodiments of the present invention provide a ship provided with the natural gas engine of the first aspect.
Above-mentioned the utility model has the advantages as follows:
1. the utility model discloses a natural gas engine, through setting up the detection pipeline, gas detecting element and negative-pressure air fan are installed to the detection pipeline, can utilize negative-pressure air fan with the gas suction detection pipeline in cylinder and the blast pipe, and then whether there is combustible gas in utilizing gas detecting element to judge the blast pipe, make things convenient for the staff in time to take measures to blow off the combustible gas in blast pipe and the cylinder, the engine that has avoided engine cylinder and the interior gas of blast pipe to lead to the fact starts the condition that difficulty and gas after-combustion, blast pipe blasting.
2. The utility model discloses a natural gas engine detects the pipeline and installs the check valve for gaseous inlet end flow direction by the detection pipeline of can only giving vent to anger the end, has avoided the external gas to get into the detection pipeline, has guaranteed the accuracy of testing result, simultaneously owing to set up the check valve, makes the engine normal during operation blast pipe exhaust high-temperature gas can not flow down the detection pipeline, has avoided causing the damage to gas detecting element and negative-pressure air fan on the detection pipeline.
3. The utility model discloses a natural gas engine detects the pipeline and installs automatically controlled ooff valve, can close the detection pipeline at the normal during operation of engine, prevents that the engine from normally working exhaust high temperature tail gas from getting into the detection pipeline and causing the damage to gas detecting element and negative-pressure air fan.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments of the application are intended to be illustrative of the application and are not intended to limit the application.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
the system comprises an Electronic Control Unit (ECU), a gas injection valve, an air inlet pipe, a supercharger, a cylinder, a pressure boosting front pipe section, an electric control butterfly valve, a gas detector, a negative pressure fan, a check valve and a pressure boosting rear pipe section, wherein the ECU comprises a 1 part, a 2 part, a gas injection valve, a 3 part, an air inlet pipe, a 4 part, the supercharger, a 5 part, the cylinder, a 6 part, the pressure boosting front pipe section, a 7 part, the electric control butterfly valve, a 8 part, the gas detector, a 9 part, the negative pressure fan, a 10 part and a 11 part.
Detailed Description
Example 1
The embodiment provides a natural gas engine for car or boats and ships, judge before the engine start whether have combustible gas in cylinder and the blast pipe, as shown in fig. 1, natural gas engine includes at least one cylinder 5, and cylinder 5 and intake pipe 3 are connected, and inside the outside air can get into cylinder 5 through intake pipe 3, cylinder 5 still is connected with the blast pipe, and the waste gas that the piston in the cylinder 5 does work and produces can pass through the blast pipe and discharge.
In this embodiment, six cylinders are provided, in other embodiments, four cylinders, eight cylinders, or the like may be provided, and the cylinders 5 may be provided with components such as a piston, a crankshaft, and the like according to actual needs.
In the existing natural gas engine, if the gas in the cylinder 5 is too rich or the combustible mixed gas enters the cylinder and the exhaust pipe of the engine without being combusted, the phenomenon that the engine is difficult to start can be caused, so whether combustible gas exists in the exhaust pipe and the cylinder or not needs to be detected.
Therefore, in this embodiment, the natural gas engine further includes a detection pipeline, an air inlet end of the detection pipeline is connected to the exhaust pipe, and the exhaust pipe and the gas in the cylinder 5 can enter the detection pipeline.
The detection pipeline is provided with an electric control switch valve which can control the connection and the disconnection of the detection pipeline, and the electric control switch valve is connected with an Electronic Control Unit (ECU)1 of the natural gas engine and can receive the instruction of the Electronic Control Unit (ECU)1 to work.
The electric control switch valve adopts an electric control butterfly valve 7, an electric control ball valve or other types of electric control switch valves capable of controlling the conduction and the closing of pipelines, and a person skilled in the art can select the electric control butterfly valve 7 as the electric control switch valve according to actual needs.
And a pipe section between the air outlet end of the detection pipeline and the electric control switch valve is provided with a fuel gas detection element and a negative pressure fan 9.
The gas detecting element adopts a gas detector 8, the gas detector 8 and the negative pressure air fan 9 are both connected with an Electronic Control Unit (ECU)1, the gas detector 8 can transmit gas information obtained by detection to the Electronic Control Unit (ECU)1, and the Electronic Control Unit (ECU)1 can control the starting and stopping of the negative pressure air fan 9.
In this embodiment, the gas detector 8 is disposed close to the electrically controlled switch valve, the check valve 10 is installed in a pipe section between the air outlet end of the detection pipeline and the negative pressure fan 9, and the check valve 10 allows gas to flow only in a direction from the air inlet end to the air outlet end of the detection pipeline.
The Electronic Control Unit (ECU)1 can send an instruction to the negative pressure fan 9 to control the negative pressure fan 9 to start working, after the negative pressure fan 9 starts working, the Electronic Control Unit (ECU)1 sends an instruction to the electric control butterfly valve 7 to control the electric control butterfly valve 7 to be opened, the negative pressure fan 9 can drive gas in the air cylinder 5 and the exhaust pipe to enter the detection pipeline, and therefore the gas detector 8 is used for detecting the gas in the detection pipeline.
When the engine normally works, the Electronic Control Unit (ECU)1 sends an instruction to the electric control butterfly valve 7 to control the electric control butterfly valve 7 to be closed, high-temperature tail gas generated during the working of the cylinder 5 can be prevented from entering a detection pipeline through the exhaust pipe, the high-temperature damage of the gas detector 8 and the negative pressure fan 9 is caused, meanwhile, the check valve 10 can also prevent external gas from entering the detection pipeline, and the influence on the accuracy of a detection structure is avoided.
The end lug connection that gives vent to anger of detection pipeline is to external environment or be connected to the blast pipe, when the end lug connection external environment that gives vent to anger of detection pipeline, need set up extra support and support the detection pipeline in order to guarantee its installation firmness, therefore, in this embodiment, the end of giving vent to anger of detection pipeline is connected to the blast pipe, make the both ends of detection pipeline all be connected to the blast pipe, utilize the blast pipe to support, need not extra support that sets up, under negative-pressure air fan 9's effect, the gas that gets into the detection pipeline can flow back the blast pipe again behind check valve 10, discharge gas through the blast pipe.
In this embodiment, the exhaust pipe is provided with the supercharger 4, the supercharger divides the exhaust pipe into a supercharging front pipe section 6 and a supercharging rear pipe section 15, the supercharging front pipe section 6 is connected with an exhaust manifold of the cylinder 5, and the supercharging rear pipe section 15 is used for discharging tail gas to the external environment.
Because the detection pipeline is provided with the negative pressure fan 9, the negative pressure fan 9 plays a certain supercharging role on gas in the detection pipeline, and the gas in the detection pipeline does not need to be supercharged any more, so that the gas inlet end of the detection pipeline is connected to the pipe section 6 before supercharging, and the gas outlet end of the detection pipeline is connected to the pipe section 15 after supercharging.
The intake pipe 3 is connected with a gas inlet pipe and an air inlet pipe, natural gas enters the intake pipe through the gas inlet pipe, external air enters the intake pipe through the air inlet pipe, and the entering natural device and air are mixed in the intake pipe and enter the cylinder.
The gas inlet pipe is provided with a gas injection valve 2, the gas injection valve 2 of the embodiment adopts an electric control gas injection valve, the electric control gas injection valve is connected with an Electronic Control Unit (ECU)1 and can receive the instruction of the Electronic Control Unit (ECU)1 to work, and the Electronic Control Unit (ECU)1 can control the electric control gas injection valve to inject natural gas into the gas inlet pipe.
In this embodiment, a supercharger 4 is disposed between the intake pipe 3 and the air intake pipe, and air before entering the engine cylinder is compressed by the supercharger to increase the density of the air, so that more air is filled into the cylinder 5, thereby increasing the power of the engine.
The natural gas engine further comprises an electric ignition system, the electric ignition system can be an existing electric ignition system of the natural gas engine, and detailed description is omitted here.
The working method of the natural gas engine in the embodiment comprises the following steps:
an operator triggers a start signal, and an Electronic Control Unit (ECU)1, upon receiving a start command, first inquires whether to skip the combustible gas detection.
If an operator selects to skip the detection of combustible gas, the engine starts the motor to operate, the Electronic Control Unit (ECU)1 controls the gas injection valve 2 to be opened, the ignition system works, the Electronic Control Unit (ECU)1 receives the rotating speed information of the engine, if the rotating speed of the engine reaches the set operating rotating speed, the starting is successful, and if the rotating speed of the engine cannot reach the set operating rotating speed within the starting time, alarm information is sent out, and the starting is failed.
If the operator chooses to perform combustible gas detection, an Electronic Control Unit (ECU)1 first detects the stop time of the engine and simultaneously detects whether a start failure alarm is triggered during the last start.
When the stopping time T1 is greater than the set time T1, or an over-starting failure alarm is detected, the Electronic Control Unit (ECU)1 controls the operation of the negative pressure fan 9 through a negative pressure fan control signal, and simultaneously opens the electric control butterfly valve 7 through an electric control butterfly valve control signal, the negative pressure fan 9 pumps the gas in the exhaust pipe and the cylinder 5 to a detection pipeline, and the gas detector 8 detects whether combustible gas exists in the pumped gas.
a. If an Electronic Control Unit (ECU)1 receives a signal that a gas detector 8 detects gas, the starting motor is controlled to operate, a gas injection valve 2 is closed through a gas injection valve control signal, an ignition system is closed, the engine operates, the engine idles at the moment, air is sucked from an air inlet pipe 3, air is compressed in a cylinder 5 by a piston and then is discharged from an exhaust pipe, and further combustible mixed gas in the cylinder and the exhaust pipe is blown out.
b. The Electronic Control Unit (ECU)1 does not receive the gas sensor signal, the engine starts the motor operation, the Electronic Control Unit (ECU)1 controls the gas injection valve 2 to open, and the ignition system works. An Electronic Control Unit (ECU)1 detects whether the rotating speed of an engine reaches a set rotating speed, if the rotating speed reaches the set rotating speed, the engine is started successfully, the rotating speed cannot reach the set rotating speed within the starting time, an alarm is given, and the engine fails to start.
When the stopping time T1 is less than the set time T1 and the Electronic Control Unit (ECU)1 does not detect the failed start alarm, the engine starting motor is operated, the Electronic Control Unit (ECU)1 controls the gas injection valve 2 to be opened, and the ignition system works. An Electronic Control Unit (ECU)1 detects whether the rotating speed of an engine reaches a set operating rotating speed, if the rotating speed reaches the set operating rotating speed, the starting is successful, the set operating rotating speed cannot be reached within the starting time, alarm information is sent, and the starting fails.
The natural gas engine of this embodiment improves on current natural gas engine's structure, through increasing components such as detection pipeline, automatically controlled butterfly valve 7, gas detector 8 and negative-pressure air fan 9, can effectively take out the gas in blast pipe and the cylinder and detect whether it contains combustible gas, makes things convenient for the operator in time to take measures to handle, has avoided starting difficulty and blast pipe blasting phenomenon.
Example 2
The embodiment provides a natural gas engine, which is different from embodiment 1 only in that a negative pressure fan is arranged close to an electric control switch valve, a check valve is installed on a pipe section between an air outlet end of a detection pipeline and a gas detector, and other structures and working principles are the same as those of embodiment 1, and repeated description is omitted here.
Example 3
The present embodiment provides a vehicle provided with the natural gas engine according to embodiment 1 or embodiment 2, and the vehicle is a commercial vehicle, an engineering machine vehicle, an agricultural machine vehicle, or the like.
Example 4
The present embodiment provides a ship provided with the natural gas engine described in embodiment 1 or embodiment 2.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (11)
1. The natural gas engine comprises an exhaust pipe and is characterized in that the exhaust pipe is connected with a detection pipeline, an electric control switch valve is installed on the detection pipeline, and a negative pressure fan and a fuel gas detection element are installed on a pipe section between an air outlet end of the detection pipeline and the electric control switch valve.
2. The natural gas engine of claim 1, wherein the negative pressure fan is disposed adjacent to the electronically controlled on/off valve, and a section of the line between the outlet end of the test line and the negative pressure fan is provided with a one-way valve that allows gas to flow only from the inlet end to the outlet end of the test line.
3. The natural gas engine of claim 1 wherein the gas sensing element is located adjacent to the electronically controlled on/off valve and the section of the sensing line between the outlet end and the suction fan is provided with a one-way valve that allows gas to flow only from the inlet end to the outlet end of the sensing line.
4. The natural gas engine of claim 1, wherein the gas detection element, the negative pressure fan and the electrically controlled on-off valve are connected to an electronic control unit of the natural gas engine.
5. The natural gas engine of claim 1, wherein the inlet end and the outlet end of the detection pipeline are both connected to an exhaust pipe, or the inlet end of the detection pipeline is connected to the exhaust pipe and the outlet end is directly connected to the external environment.
6. The natural gas engine as claimed in claim 1, wherein the exhaust pipe is provided with a supercharger which divides the exhaust pipe into a supercharged front pipe section and a supercharged rear pipe section, an air inlet end of the detection pipeline is connected to the supercharged front pipe section, and an air outlet end of the detection pipeline is connected to the supercharged rear pipe section.
7. The natural gas engine of claim 1 wherein said gas sensing element comprises a gas sensor.
8. The natural gas engine as claimed in claim 1, wherein the gas inlet pipe of the natural gas engine is connected with a gas inlet pipe, the gas inlet pipe is provided with a gas injection valve, and the gas injection valve is connected with the electronic control unit.
9. The natural gas engine of claim 1, wherein an intake pipe of the natural gas engine is connected to an air intake pipe through a supercharger.
10. A vehicle characterized by being provided with the natural gas engine as claimed in any one of claims 1 to 9.
11. A ship, characterized in that a natural gas engine according to any one of claims 1 to 9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123297766.5U CN217270417U (en) | 2021-12-24 | 2021-12-24 | Natural gas engine, vehicle and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123297766.5U CN217270417U (en) | 2021-12-24 | 2021-12-24 | Natural gas engine, vehicle and ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217270417U true CN217270417U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123297766.5U Active CN217270417U (en) | 2021-12-24 | 2021-12-24 | Natural gas engine, vehicle and ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217270417U (en) |
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2021
- 2021-12-24 CN CN202123297766.5U patent/CN217270417U/en active Active
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