CN203978645U - A kind of natural gas engine two-way gas supply system - Google Patents
A kind of natural gas engine two-way gas supply system Download PDFInfo
- Publication number
- CN203978645U CN203978645U CN201420408666.6U CN201420408666U CN203978645U CN 203978645 U CN203978645 U CN 203978645U CN 201420408666 U CN201420408666 U CN 201420408666U CN 203978645 U CN203978645 U CN 203978645U
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- supply system
- natural gas
- engine
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- air
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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
Abstract
The utility model discloses a kind of natural gas engine two-way gas supply system, comprise electric control system ECU, natural gas engine and for the gas supply system to natural gas engine supply mixed gas, described gas supply system comprises: main mixture supply system and auxiliary mixed gas supply system; The flow of described main mixture supply system and auxiliary mixed gas supply system is respectively by electric control system ECU control; The utility model beneficial effect: adopt the two-way gas supply system that improves natural gas engine responsiveness, natural gas engine is in the time of load impact, the extra supply engine part of auxiliary mixed gas supply system mixed gas, thereby having overcome traditional intake manifold, to spray natural gas engine responsiveness slow, when load impact, rotating speed reduces, the problem that moment of torsion declines, improves power character and the reliability of being clear gas motor, has improved the operability of configuration natural gas engine dynamic power machine.
Description
Technical field
The utility model relates to the technical field of natural gas engine, relates in particular to a kind of motor two-way gas supply system that improves natural gas engine responsiveness.
Background technique
Rock gas is a kind of clean fuel, except from natural gas field, associated gas field gather, can also produce from oil shale or biomass energy, has wide material sources, and the advantage that price is low, is a kind of desirable internal-combustion engine alternative energy source.At present, the countries in the world government including China all takes much count of the exploitation of natural gas engine, and the machinery using natural gas engine as power is being played the part of more and more important role in the national economic development.
The Spark Ignition Natural Gas Engines that intake manifold's single-point mixes is the natural gas engine of current recoverable amount maximum.The source of the gas of vehicular engine and marine engine is pressure gas source, the mode that therefore after general employing pressurized machine, single-point mixes in supercharging vehicular engine.The advantage of single-point mixed gas motor is that rock gas/air mixing is more even, and more even in the velocity of propagation of combustion process Flame all directions, inside, firing chamber can not form local overrich district and the too high region of heat load.
The shortcoming of this natural gas engine be the adjustment of emitted dose of rock gas by supercharging after the flow of air determine, and the boosting capability of pressurized machine is subject to the restriction of Maximum available energy in exhaust.Motor is in the time that load impact or throttle opening increase sharply suddenly, and owing to being subject to pressurized machine responsiveness, the impact of the aspects such as the responsiveness of air inlet in air inlet system and exhaust system causes engine response poor, occurs the problems such as rotating speed reduces, and moment of torsion rising is slow.Cause the power car or the boats and ships that configure this natural gas engine to occur that manual dexterity is low, the problems such as job insecurity.
Model utility content
The purpose of this utility model is exactly in order to address the above problem, a kind of natural gas engine two-way gas supply system has been proposed, this system has overcome traditional intake manifold, and to spray natural gas engine responsiveness slow, when load impact, rotating speed reduces, the problem that moment of torsion declines, has improved the operability that configures natural gas engine dynamic power machine.
To achieve these goals, the utility model adopts following technological scheme:
A kind of natural gas engine two-way gas supply system, comprise electric control system ECU, natural gas engine and for the gas supply system to natural gas engine supply mixed gas, it is characterized in that, described gas supply system comprises: main mixture supply system and auxiliary mixed gas supply system; The flow of described main mixture supply system and auxiliary mixed gas supply system is respectively by electric control system ECU control;
Described main mixture supply system comprises: natural gas storage device, decompressor, voltage stabilizer, mechanical thermal exchanger, electrically controlled injector and mixer connect successively by gas pipeline; Access mixer after pressurized machine is connected by air pipe line with intercooler;
Rock gas enters mixer through decompressor, voltage stabilizer, mechanical thermal exchanger, electrically controlled injector successively; Ambient air enters mixer and mixes with rock gas through engine supercharger, intercooler successively;
Described auxiliary mixed gas supply system comprises: access mixer after pressurized air storage device is connected by auxiliary-air line with auxiliary flow control valve; Pressurized air enters the auxiliary air mass flow that increases of mixer through auxiliary flow control valve;
Also comprise:
Described mixer is connected with natural gas engine through electronic throttle, and described electrically controlled injector is connected with electric control system ECU respectively with electronic throttle.
On the pipeline that described mechanical thermal exchanger is connected with electrically controlled injector, natural gas flowmeter is set, described natural gas flowmeter is connected with electric control system ECU.
On the air pipe line that described intercooler is connected with mixer, Air flow meter is set, described Air flow meter is connected with electric control system ECU.
Auxiliary air flow meter is set on the auxiliary-air line that described auxiliary flow control valve is connected with mixer, and score is not connected with electric control system ECU described auxiliary flow control valve with auxiliary air flow.
The outlet port of described pressurized air storage device arranges air cutoff valve.
The Exhaust Gas of described natural gas engine is discharged through catalysis preprocessor, in the outlet port of described catalysis preprocessor, exhaust gas oxygen sensor is set, and described exhaust gas oxygen sensor is connected with electric control system ECU.
When motor stable operation, provide mixed gas by main mixture supply system for motor; The amount of natural gas of electric control system ECU control electrically controlled injector ejection;
Engine load change and engine speed during with original stable operation compared with the value of the fluctuation of speed while exceeding setting threshold, by main mixture supply system and auxiliary mixed gas supply system jointly for motor provides mixed gas; Electric control system ECU gathers the variation of engine speed, and controlling electronic throttle aperture increases, and opens auxiliary air flow control valve, controls in real time the mixed gas flow of auxiliary mixed gas supply system;
After engine speed is stable, auxiliary mixer supply system quits work, and main mixture supply system continues as motor mixed gas is provided.
The beneficial effects of the utility model are:
The utility model adopts the two-way gas supply system that improves natural gas engine responsiveness, natural gas engine is in the time of load impact, the extra supply engine part of auxiliary mixed gas supply system mixed gas, thereby having overcome traditional intake manifold, to spray natural gas engine responsiveness slow, when load impact, rotating speed reduces, the problem that moment of torsion declines, improves power character and the reliability of being clear gas motor, has improved the operability of configuration natural gas engine dynamic power machine.
Brief description of the drawings
Fig. 1 is natural gas engine gas supply system work schematic diagram of the prior art;
Fig. 2 is the utility model natural gas engine two-way gas supply system work schematic diagram;
Wherein, 201. natural gas steel cylinder, 202. electric control system ECU, 203. exhaust gas oxygen sensor, 204. catalysis preprocessors, 205. natural gas engine, 206. pressurized machine, 207. intercooler, 208. compressed air cylinder, 209 air cutoff valves, 210. auxiliary-air line, 211. air pipe line, 212. auxiliary air flow control valves, 213. auxiliary air flow meters, 214. Air flow meter, 215. electronic throttle, 216. mixer, 217. electrically controlled injector, 218. natural gas flowmeter, 219. mechanical thermal exchangers, 220. voltage stabilizer, 221. gas pipeline, 222. rock gas decompressors, 223. rock gas cut-off valves.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Figure 1 shows that the schematic diagram of the natural gas engine gas supply system of prior art.This natural gas engine gas supply system can comprise natural gas steel cylinder 201, electric control system ECU 202, exhaust gas oxygen sensor 203, catalysis preprocessor 204, natural gas engine 205, pressurized machine 206, intercooler 207, air pipe line 211, Air flow meter 214, electronic throttle 215, mixer 216, electrically controlled injector 217, natural gas flowmeter 218, mechanical thermal exchanger 219, voltage stabilizer 220, gas pipeline 221, rock gas decompressor 222, rock gas cut-off valve 223.
First set forth the supply process of rock gas according to Fig. 1, in engine operation, open rock gas cut-off valve 223, the high-pressure natural gas storing in natural gas steel cylinder 201 reaches design pressure after 222 decompressions of rock gas decompressor, flow into voltage stabilizer 220 from gas pipeline 221, rock gas is carried out to voltage stabilizing, in maintenance working procedure, pressure is stable, entering mechanical thermal exchanger 219 adjusts roughly the temperature of rock gas again, then flow into electrically controlled injector 217, the air mass flow that electric control system ECU 202 is measured according to the working order of motor and Air flow meter 214 is calculated natural gas injection amount, the rock gas spraying mixes with air in mixer 216, through electronic throttle 215, flow into work by combustion in natural gas engine 205, for vehicle provides power, the waste gas that natural gas engine 205 burns enters in after-treatment system 204 and is further processed, enter in atmosphere.The supply process of air be through mixed gas after natural gas engine 205 work by combustion, enter outlet pipe, exhaust has certain available energy, this part available can acting to turbine wheel in the turbine of pressurized machine 206, drive the gas compressor of pressurized machine 206 to do work to air, pressure, the temperature of air raise, and the air after supercharging is after intercooler 207 is cooling, and the rock gas that enters mixer 216 and injection by air pipe line 211 mixes.
The utility model patent is described the response process of natural gas engine as an example of load impact example.Natural gas engine is premixed combustion, and the adjustment process amount of belonging to of its power and rotating speed regulates, and in intake process, the ECU (Electrical Control Unit) ECU202 of natural gas engine controls electrically controlled injector 217 to mixer injection rock gas.In the time of load impact, the rotating speed of natural gas engine 205 is reduced, according to the effect of feedback, electric control system ECU 202 should increase the emitted dose of rock gas, to improve the external acting ability of motor, makes rotating speed go back up to given rotating speed.
According to the natural gas engine gas supply system of the prior art, the emitted dose that electric control system ECU 202 calculates is controlled by air mass flow and MAP, MAP demarcates in advance, and air mass flow is subject to the aperture of electronic throttle 215 and the boosting capability control of pressurized machine 206.Electric control system ECU collects after feedback information, the increase of air mass flow is subject to the impact of the responsiveness of responsiveness, electronic throttle 215 apertures of pressurized machine 206, wherein electronic throttle 215 is very fast by the direct control response of electric control system ECU, and the boosting capability of pressurized machine 206 is subject to the impact response of air inlet, burning, exhaust slower.In addition, the longer pipeline that also needs after supercharging air to flow through could arrive mixer 216 leading portions.Causing electric control system ECU to receive feedback information will could regulate the emitted dose of rock gas through the longer time, and the dynamic response of motor is slower.
The utility model natural gas engine two-way gas supply system as shown in Figure 2, the gas supply system of natural gas engine adopts the mode of main mixture supply system and auxiliary mixed gas supply system coupling work, main mixture supply system mixes rock gas and air and supplies with natural gas engine 205 in the time of motor stable operation, auxiliary mixed gas supply system is by air and the rock gas of compensation certain flow, to improve the responsiveness of motor in the time loading impact, make engine speed stable, be quick on the draw.
Main mixture supply system mixes rock gas and air supply engine in the time of motor stable operation.When motor stable operation, after pressurized machine 206 superchargings air cooling in intercooler 207 after, enter mixer 216 and rock gas mixing through air pipe line 211, be arranged on Air flow meter 214 in air pipe line 211 and measure the flow of air, electric control system ECU 202 is according to calculation of parameter natural gas injection amounts such as air mass flow engine speed, spray in mixer 216 and mix with air through electrically controlled injector 217, after the control of electronic throttle 215, enter engine combustion acting.In the time that natural gas engine 205 is loaded impact, electric control system ECU 202 collects the variation of engine speed, electronic throttle 215 and auxiliary air flow control valve 212 to motor after computing are exported control signal, increase the aperture of electronic throttle 215, auxiliary air flow control valve 212 is opened, part auxiliary air enters in mixer 216 through auxiliary-air line 210, the flow that auxiliary air flow meter 213 gathers auxiliary air is as feedback signal, control the follow-up flow of auxiliary air, electric control system ECU 202 calculates natural gas injection amount according to total air, injection enters natural gas engine 205 after entering mixer 216 and air mixing, after engine speed is stable, auxiliary mixed gas supply system quits work, main mixture supply system provides mixed gas for natural gas engine 205.
Electric control system ECU 202 is controlled the electronic throttle 215 of main mixture supply system and the auxiliary air flow control valve 212 of auxiliary mixed gas supply system simultaneously, with natural gas injection amount and the air mass flow total according to the Operation Conditions control of natural gas engine 205, reach the object of improving natural gas engine 205 responsivenesss.
Auxiliary mixed gas supply system does not rely on degree of boost and the responsiveness of the pressurized machine 206 of motor, controlled aperture and the air mass flow of auxiliary air flow control valve 212 by electric control system ECU 202, supply with extra air and rock gas to natural gas engine 205.
Auxiliary mixed gas supply system comprises compressed air cylinder 208, and compressed-air-storing is after compression in compressed air cylinder 208, and by entering mixer 216 after auxiliary-air line 210 and auxiliary air flow control valve 212; Between auxiliary air flow control valve 212 and mixer 216, Air flow meter 214 is set.
It should be noted that, with the example of natural gas engine gas supply system, the utility model is described hereinbefore.But the utility model is not limited to this, but go for adopting other gas engines existing or that occur in the future.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection domain of the present utility model.
Claims (7)
1. a natural gas engine two-way gas supply system, comprise electric control system ECU, natural gas engine and for the gas supply system to natural gas engine supply mixed gas, it is characterized in that, described gas supply system comprises: main mixture supply system and auxiliary mixed gas supply system; The flow of described main mixture supply system and auxiliary mixed gas supply system is respectively by electric control system ECU control;
Described main mixture supply system comprises: natural gas storage device, decompressor, voltage stabilizer, mechanical thermal exchanger, electrically controlled injector and mixer connect successively by gas pipeline; Access mixer after pressurized machine is connected by air pipe line with intercooler;
Rock gas enters mixer through decompressor, voltage stabilizer, mechanical thermal exchanger, electrically controlled injector successively; Ambient air enters mixer and mixes with rock gas through engine supercharger, intercooler successively;
Described auxiliary mixed gas supply system comprises: access mixer after pressurized air storage device is connected by auxiliary-air line with auxiliary flow control valve; Pressurized air enters the auxiliary air mass flow that increases of mixer through auxiliary flow control valve.
2. a kind of natural gas engine two-way gas supply system as claimed in claim 1, is characterized in that, also comprises:
Described mixer is connected with natural gas engine through electronic throttle, and described electrically controlled injector is connected with electric control system ECU respectively with electronic throttle.
3. a kind of natural gas engine two-way gas supply system as claimed in claim 1, is characterized in that, on the pipeline that described mechanical thermal exchanger is connected with electrically controlled injector, natural gas flowmeter is set, described natural gas flowmeter is connected with electric control system ECU.
4. a kind of natural gas engine two-way gas supply system as claimed in claim 1, is characterized in that, on the air pipe line that described intercooler is connected with mixer, Air flow meter is set, described Air flow meter is connected with electric control system ECU.
5. a kind of natural gas engine two-way gas supply system as claimed in claim 1, it is characterized in that, auxiliary air flow meter is set on the auxiliary-air line that described auxiliary flow control valve is connected with mixer, and score is not connected with electric control system ECU described auxiliary flow control valve with auxiliary air flow.
6. a kind of natural gas engine two-way gas supply system as claimed in claim 1, is characterized in that, the outlet port of described pressurized air storage device arranges air cutoff valve.
7. a kind of natural gas engine two-way gas supply system as claimed in claim 1, it is characterized in that, the Exhaust Gas of described natural gas engine is discharged through catalysis preprocessor, outlet port at described catalysis preprocessor arranges exhaust gas oxygen sensor, and described exhaust gas oxygen sensor is connected with electric control system ECU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408666.6U CN203978645U (en) | 2014-07-23 | 2014-07-23 | A kind of natural gas engine two-way gas supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408666.6U CN203978645U (en) | 2014-07-23 | 2014-07-23 | A kind of natural gas engine two-way gas supply system |
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| Publication Number | Publication Date |
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| CN203978645U true CN203978645U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420408666.6U Withdrawn - After Issue CN203978645U (en) | 2014-07-23 | 2014-07-23 | A kind of natural gas engine two-way gas supply system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074634A (en) * | 2014-07-23 | 2014-10-01 | 山东大学 | Two-way gas supply system and method for natural gas engine |
| CN104775941A (en) * | 2015-04-22 | 2015-07-15 | 济南大学 | Control system and control method for improving transient response of gas engine |
| CN110056440A (en) * | 2019-04-09 | 2019-07-26 | 潍柴西港新能源动力有限公司 | The efficient transient response device of low-pressure fuel gas generating set and its response control mehtod |
| CN112267945A (en) * | 2020-10-30 | 2021-01-26 | 李晨天 | Method and device for supplying electric control constant injection pressure difference gas fuel |
-
2014
- 2014-07-23 CN CN201420408666.6U patent/CN203978645U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074634A (en) * | 2014-07-23 | 2014-10-01 | 山东大学 | Two-way gas supply system and method for natural gas engine |
| CN104775941A (en) * | 2015-04-22 | 2015-07-15 | 济南大学 | Control system and control method for improving transient response of gas engine |
| CN104775941B (en) * | 2015-04-22 | 2017-03-01 | 济南大学 | Improve the control method of gas engine transient response |
| CN110056440A (en) * | 2019-04-09 | 2019-07-26 | 潍柴西港新能源动力有限公司 | The efficient transient response device of low-pressure fuel gas generating set and its response control mehtod |
| CN110056440B (en) * | 2019-04-09 | 2024-04-12 | 潍柴西港新能源动力有限公司 | High-efficiency transient response device of low-pressure gas generator set and response control method thereof |
| CN112267945A (en) * | 2020-10-30 | 2021-01-26 | 李晨天 | Method and device for supplying electric control constant injection pressure difference gas fuel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141203 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |