CN102635429A - Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen - Google Patents
Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen Download PDFInfo
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Abstract
The invention relates to a device and a method for carrying out closed-loop control on discharge of an internal combustion engine by using hydrogen and oxygen, belonging to the field of discharge control of internal combustion engines. According to a system of the device, on the basis of keeping all main bodies and control systems of the original engine, a set of tail gas catalytic conversion system, a set of hydrogen/oxygen injection system capable of realizing the closed-loop control and a set of vehicle-mounted hydrogen and oxygen preparing and storing system are additionally arranged. The device mainly comprises a hydrogen nozzle, an oxygen nozzle, a reduction catalytic device, an oxidation catalytic device, an NOx sensor, a CO sensor, a hydrogen/oxygen electronic control unit which are arranged on an exhaust pipe of the internal combustion engine. The electronic control unit is used for determining the basic injection amounts of the hydrogen and the oxygen injected into the reduction catalytic device and the oxidization catalytic device according to revolving speed and inlet gas flow, and adjusting the corrected injection pulse widths of the hydrogen and the oxygen according to the NOx concentration behind the reduction catalytic device and the CO concentration behind the oxidation catalytic device, so that harmful discharge produced when the internal combustion engine runs is treated and wastes of the hydrogen and the oxygen are reduced.
Description
Technical field
The present invention provides a kind of device and method that utilizes hydrogen, oxygen closed loop control engine exhaust, and particular content relates to a kind of device and method that utilizes hydrogen, oxygen and corresponding catalyst converter to transform engine exhaust, belongs to engine exhaust control field.
Background technique
Traditional internal-combustion engine ternary catalyzing unit only is in the transformation efficiency that just can reach maximum under the chemically correct fuel condition in fuel-air Mixture.Yet, for gasoline engine and diesel engine, because mixed gas is in the lean-burn state in the cylinder, so the abundant catalyzed conversion of HC, CO and NOx that traditional ternary catalyzing unit was produced when being difficult to internal combustion engine operation.Simultaneously, utilize the apparatus cost of technical finesse NOx such as SCR and DPF and particulate matter expensive.
Invention disclosed patent " a kind of engine exhaust control gear and method " (publication number: CN102155278A) proposed a kind of vehicle-mounted hydrogen production mechanism of utilizing and got hydrogen and oxygen, and utilized hydrogen and oxygen reducing NOx or oxidation HC, CO and granular material discharged device and method respectively based on vehicle-mounted hydrogen production oxygen machine.But; In invention disclosed patent; The emitted dose of hydrogen and oxygen adopts open-loop control method, and this system that makes is difficult to according to the actual changing effect rapid adjustment hydrogen of HC, CO, NOx and particulate matter and the injection proportion of oxygen, thereby is difficult to reach excellent control effect.
Summary of the invention
Be not suitable for diesel engine and gasoline engine to present three-way catalytic converter; And the problem that does not adopt closed loop control when existing employing hydrogen and oxygen catalyzed conversion HC, CO, NOx and particulate matter, the present invention provides a kind of device and method that utilizes hydrogen, oxygen closed loop control engine exhaust.
The present invention has adopted following technological scheme, and a kind of device of hydrogen, oxygen closed loop control engine exhaust that utilizes in this invention comprises internal-combustion engine 13 and internal-combustion engine vent-pipe 10.It is characterized in that having increased a cover tail gas conversion system; An one cover oxyhydrogen gas ejecting system and a cover on-board hydrogen, oxygen are produced, stocking system, comprising: system oxyhydrogen machine 1, hydrogen storage tank 2, oxygen storage tank 3, NOx sensor 4, CO sensor 5, hydrogen nozzle 6, oxygen jet 7, oxidation catalyzer 8, reduction catalyst converter 9, exhaust gas temperature sensor 11 and electronic control unit 12.Vehicle-mounted hydrogen production oxygen machine 1 will be stored in hydrogen storage tank 2 and the oxygen storage tank 3 through pipeline respectively through hydrogen and the oxygen that brine electrolysis makes when motor moves; Hydrogen storage tank 2 is connected with oxygen jet 7 with hydrogen nozzle 6 through pipeline respectively with oxygen storage tank 3; Hydrogen nozzle 6 is separately fixed on reduction catalyst converter 9 and the oxidation catalyzer 8 with oxygen jet 7; Exhaust gas temperature sensor 11, reduction catalyst converter 9 and oxidation catalyzer 8 are separately fixed on the exhaust manifold for internal combustion engine.
A kind of device that utilizes hydrogen, oxygen closed loop control engine exhaust, its method of operation is following:
A kind of device that utilizes hydrogen, oxygen closed loop control engine exhaust is when operation, and system oxyhydrogen machine 1 is stored in hydrogen that makes and oxygen in hydrogen storage tank 2 and the oxygen storage tank 3.Electronic control unit 12 obtains the Tail Pipe Temperature signal c from exhaust gas temperature sensor 11, and judges according to delivery temperature whether hydrogen and oxygen jet are opened.When Tail Pipe Temperature is lower than the catalyzer initiation temperature and is about 250 ℃; Catalyzer is difficult to fully with motor exhaust catalyzed conversion under the effect of hydrogen and oxygen, so electronic control unit 12 sends control signal d at this moment, g is closed hydrogen nozzle 6 and oxygen jet 7.When Tail Pipe Temperature is higher than the catalyzer initiation temperature and is about 250 ℃; Electronic control unit 12 sends control signal d, g is opened hydrogen nozzle 6 and oxygen jet 7; And calculate the basic emitted dose of hydrogen and oxygen under different rotating speeds, load and the excess air coefficient and revise emitted dose according to tach signal a, air flow rate signal b, NOx sensor signal e and CO sensor signal f; And the opening and closing of control hydrogen nozzle 6 and oxygen jet 7; Make HC, CO and particulate matter in oxidation catalyzer 8 by dioxygen oxidation Cheng Shui and carbon dioxide, and make NOx in reduction catalyst converter 9, be reduced into the nitrogen G&W.
Addition obtains every circulation actual ejection pulsewidth of hydrogen that electronic control unit 12 is controlled and oxygen jet with the correction injection pulse width by its basic injection pulse width separately respectively.
The calculating of hydrogen and the basic injection pulse width of oxygen: electronic control unit 12 is according to tach signal a and air flow rate signal b and according to T
H2, b=15m
a/ (ρ
a* V
d* N) [formula 1] and t
O2, b=9.75m
a/ (ρ
a* V
d* N) [formula 2] calculate the basic injection pulse width of hydrogen and oxygen.In formula 1 and the formula 2, t
H2, bWith t
O2, bBe respectively the basic injection pulse width ms of hydrogen and oxygen, m
aBe the MAF signal that obtains from air flow rate signal c, ρ
aBe air density, V
dBe engine swept volume, N is the internal-combustion engine rotational speed that obtains from tach signal b.When engine load strengthens; Oxyhydrogen gas electronic control unit 16 can strengthen the injection pulse width of hydrogen and oxygen automatically according to the result who utilizes formula 1 and formula 2 to be calculated, and makes more hydrogen and oxygen in reduction catalyst converter 8 and oxidation catalyzer 9, HC, CO, NOx and particulate matter fully are converted into water, carbon dioxide and nitrogen.
The calculating of hydrogen and oxygen correction injection pulse width: electronic control unit 12 is confirmed the correction injection pulse width signal of hydrogen and oxygen respectively according to detected NOx sensor signal e and CO sensor signal f; When the NOx concentration of electronic control unit 12 detected NOx sensor signal e indications after reduction catalyst converter 9 catalysis is higher than 2ppm; Electronic control unit 12 is through sending the opening time of hydrogen nozzle control signal d prolongation hydrogen nozzle 6; Make more hydrogen can enter into reduction catalyst converter 9, with effective reducing NOx emissions; When the NOx concentration of the detected NOx sensor signal e indication of electronic control unit 12 after reduction catalyst converter 9 catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit 12 remains unchanged the opening time of hydrogen nozzle 6 through sending hydrogen nozzle control signal d; At this moment, reduction catalyst converter 9 can effectively be converted into N2 with NOx; When the NOx concentration of the detected NOx sensor signal e indication of electronic control unit 12 after reduction catalyst converter 9 catalysis during less than 1ppm; Electronic control unit 12 reduces the opening time of hydrogen nozzle 6 through sending hydrogen nozzle control signal d; Avoiding too much hydrogen to be injected in the reduction catalyst converter 9, thereby reduce waste to hydrogen; Simultaneously; When the CO concentration of electronic control unit 12 detected CO sensor signal f indications after oxidation catalyzer 8 catalysis is higher than 2ppm; Electronic control unit 12 is through sending the opening time of oxygen jet control signal g prolongation oxygen jet 7; Make more oxygen can enter into oxidation catalyzer 8, with the efficient oxidation CO, HC and granular material discharged; When the CO concentration of the detected CO sensor signal f indication of electronic control unit 12 after oxidation catalyzer 8 catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit 12 remains unchanged the opening time of oxygen jet 7 through sending oxygen jet control signal g; At this moment, oxidation catalyzer 8 can effectively be converted into CO with CO, HC and particulate matter
2And water; When the CO concentration of the detected CO sensor signal f indication of electronic control unit 12 after oxidation catalyzer 8 catalysis during less than 1ppm; Electronic control unit 12 reduces the opening time of oxygen jet 7 through sending oxygen jet control signal g; Avoiding too much oxygen to be injected in the oxidation catalyzer 8, thereby reduce waste to oxygen.
The invention has the beneficial effects as follows;, life-span weak point high to present exhaust gases of internal combustion engines treatment device cost; The problem that the ternary catalyzing unit operating range is narrow; Proposition utilizes vehicle-mounted hydrogen production mechanism to get hydrogen, oxygen, and main noxious emission such as HC, CO, NOx and the particulate matter etc. that utilize hydrogen and oxygen to cooperate the mode of reducibility catalyzer and oxidative catalyst to come the controlling combustion engine operation time to be produced respectively.Through the NOx sensor is installed in reducibility catalyst converter rear end; And the CO sensor is installed in the oxidative catalyst rear end; Make electronic control unit realize closed loop control according to detected NOx concentration and CO concentration to hydrogen and oxygen lancing amount; Thereby improved the control accuracy of catalytic conversion system; Make dischargings such as NOx, HC, CO and particulate matter can be converted into nitrogen, water and carbon dioxide efficiently, avoided simultaneously in open-loop control system owing to hydrogen and the excessive waste that causes of oxygen lancing.
Description of drawings
Fig. 1 structure of the present invention and fundamental diagram
1 system oxyhydrogen machine; 2 hydrogen storage tank; 3 oxygen storage tank; The 4NOx sensor; The 5CO sensor; 6 hydrogen nozzles; 7 oxygen jets; 8 oxidation catalyzers; 9 reduction catalyst converters; 10 internal-combustion engine vent-pipes; 11 exhaust gas temperature sensors; 12 electronic control units; 13 internal-combustion engines
A. tach signal; B. air flow rate signal; C. Tail Pipe Temperature signal; D. hydrogen nozzle control signal; The e.NOx sensor signal; The f.CO sensor signal; G. oxygen jet control signal
Embodiment
Below in conjunction with accompanying drawing the present invention is described further:
As shown in Figure 1, this device comprises original internal-combustion engine 13 and internal-combustion engine vent-pipe 10 on the automobile.
Exhaust gas temperature sensor 11 is installed on the internal-combustion engine vent-pipe 10 through screw thread; Reduction catalyst converter 9 and oxidation catalyzer 8 are installed on the internal-combustion engine vent-pipe 10 through flange respectively; Hydrogen nozzle 6 and oxygen jet 7 are respectively through being threaded on the internal-combustion engine vent-pipe 10; Hydrogen nozzle 6 is installed on before the reduction catalyst converter 9, and oxygen jet 7 is installed on before the oxidation catalyzer 8, and NOx sensor and CO sensor are installed on the internal-combustion engine vent-pipe 10 through screw thread respectively; The NOx sensor is installed on after the reduction catalyst converter 9; The CO sensor is installed in after the oxidation catalyzer 8, and hydrogen storage tank 2 is connected with oxygen jet 7 with hydrogen nozzle 6 through the stainless steel pipeline respectively with oxygen storage tank, and the hydrogen of system oxyhydrogen machine 1 is connected with oxygen storage tank with hydrogen storage tank 2 through the stainless steel pipeline respectively with oxygen outlet.
A kind of device method of operation of hydrogen, oxygen closed loop control engine exhaust of utilizing among the present invention is following:
A kind of device that utilizes hydrogen, oxygen closed loop control engine exhaust is when operation, and system oxyhydrogen machine 1 is stored in hydrogen that makes and oxygen in hydrogen storage tank 2 and the oxygen storage tank 3.Electronic control unit 12 obtains the Tail Pipe Temperature signal c from exhaust gas temperature sensor 11, and judges according to delivery temperature whether hydrogen and oxygen jet are opened.When Tail Pipe Temperature is lower than the catalyzer initiation temperature and is about 250 ℃; Catalyzer is difficult to fully with motor exhaust catalyzed conversion under the effect of hydrogen and oxygen, so electronic control unit 12 sends control signal d at this moment, g is closed hydrogen nozzle 6 and oxygen jet 7.When Tail Pipe Temperature is higher than the catalyzer initiation temperature and is about 250 ℃; Electronic control unit 12 sends control signal d, g is opened hydrogen nozzle 6 and oxygen jet 7; And calculate the basic emitted dose of hydrogen and oxygen under different rotating speeds, load and the excess air coefficient and revise emitted dose according to tach signal a, air flow rate signal b, NOx sensor signal e and CO sensor signal f; And the opening and closing of control hydrogen nozzle 6 and oxygen jet 7; Make HC, CO and particulate matter in oxidation catalyzer 8 by dioxygen oxidation Cheng Shui and carbon dioxide, and make NOx in reduction catalyst converter 9, be reduced into the nitrogen G&W.
Addition obtains every circulation actual ejection pulsewidth of hydrogen that electronic control unit 12 is controlled and oxygen jet with the correction injection pulse width by its basic injection pulse width separately respectively.
The calculating of hydrogen and the basic injection pulse width of oxygen: electronic control unit 12 is according to tach signal a and air flow rate signal b and according to t
H2, b=15m
a/ (ρ
a* V
d* N) [formula 1] and t
O2, b=9.75m
a/ (ρ
a* V
d* N) [formula 2] calculate the basic injection pulse width of hydrogen and oxygen.In formula 1 and the formula 2, tH2, b and tO2, b are respectively the basic injection pulse width ms of hydrogen and oxygen, m
aBe the MAF signal that obtains from air flow rate signal c, ρ a is an air density, V
dBe engine swept volume, N is the internal-combustion engine rotational speed that obtains from tach signal b.When engine load strengthens; Oxyhydrogen gas electronic control unit 16 can strengthen the injection pulse width of hydrogen and oxygen automatically according to the result who utilizes formula 1 and formula 2 to be calculated, and makes more hydrogen and oxygen in reduction catalyst converter 8 and oxidation catalyzer 9, HC, CO, NOx and particulate matter fully are converted into water, carbon dioxide and nitrogen.
The calculating of hydrogen and oxygen correction injection pulse width: electronic control unit 12 is confirmed the correction injection pulse width signal of hydrogen and oxygen respectively according to detected NOx sensor signal e and CO sensor signal f; When the NOx concentration of electronic control unit 12 detected NOx sensor signal e indications after reduction catalyst converter 9 catalysis is higher than 2ppm; Electronic control unit 12 is through sending the opening time of hydrogen nozzle control signal d prolongation hydrogen nozzle 6; Make more hydrogen can enter into reduction catalyst converter 9, with effective reducing NOx emissions; When the NOx concentration of the detected NOx sensor signal e indication of electronic control unit 12 after reduction catalyst converter 9 catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit 12 remains unchanged the opening time of hydrogen nozzle 6 through sending hydrogen nozzle control signal d; At this moment, reduction catalyst converter 9 can effectively be converted into N with NOx
2When the NOx concentration of the detected NOx sensor signal e indication of electronic control unit 12 after reduction catalyst converter 9 catalysis during less than 1ppm; Electronic control unit 12 reduces the opening time of hydrogen nozzle 6 through sending hydrogen nozzle control signal d; Avoiding too much hydrogen to be injected in the reduction catalyst converter 9, thereby reduce waste to hydrogen; Simultaneously; When the CO concentration of electronic control unit 12 detected CO sensor signal f indications after oxidation catalyzer 8 catalysis is higher than 2ppm; Electronic control unit 12 is through sending the opening time of oxygen jet control signal g prolongation oxygen jet 7; Make more oxygen can enter into oxidation catalyzer 8, with the efficient oxidation CO, HC and granular material discharged; When the CO concentration of the detected CO sensor signal f indication of electronic control unit 12 after oxidation catalyzer 8 catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit 12 remains unchanged the opening time of oxygen jet 7 through sending oxygen jet control signal g; At this moment, oxidation catalyzer 8 can effectively be converted into CO with CO, HC and particulate matter
2And water; When the CO concentration of the detected CO sensor signal f indication of electronic control unit 12 after oxidation catalyzer 8 catalysis during less than 1ppm; Electronic control unit 12 reduces the opening time of oxygen jet 7 through sending oxygen jet control signal g; Avoiding too much oxygen to be injected in the oxidation catalyzer 8, thereby reduce waste to oxygen.
Present embodiment has carried out following experiment under gasoline and two kinds of internal-combustion engine different working of diesel oil condition:
Testing used motor is 2.4 liters of high-pressure common rail DID engines of in-line four cylinder and in-line four cylinder 1.6L intake port injection petrol engine, and two internal-combustion engines are all transformed according to shown in Figure 1, and the device of producing hydrogen, oxygen reduction engine exhaust with car is installed.It is commercially available 0# diesel oil that oil is used in the diesel engine experiment, and commercially available 93# gasoline is adopted in the petrol engine experiment, and hydrogen and oxygen are provided by automobile-used system oxyhydrogen machine.Use copper-based catalysts in reduction catalyst converter 9 and the oxidation catalyst 8.Use Horiba-7100DEGR type discharging appearance measure under each experiment condition before the catalysis with catalysis after HC, CO and NOx discharging, the particulate emission that uses AVL Di-smoke4000 smoke meter to measure before and after the diesel catalyst changes.Because catalyzer is nonflammable when the air outlet flue temperature is lower than 250 ℃, therefore all experiment is carried out when the air outlet flue temperature is higher than 250 ℃.
1) diesel engine experiment (324 ℃ of air outlet flue temperature)
Experiment is at internal-combustion engine 1200r/min, and torque is to carry out under the condition of 100Nm.It is 324 ℃ that electronic control unit 12 obtains exhaust temperature signal c from exhaust gas temperature sensor 11, thereby judges that hydrogen nozzle 6 and oxygen jet 7 can spray hydrogen respectively and oxygen is handled diesel engine vent gas.It is 2.0ms that electronic control unit 12 calculates the basic injection pulse width of hydrogen according to the fast signal a that is obtained and air flow rate signal b and formula 2; The basic injection pulse width of oxygen is 1.3ms; Therefore; Electronic control unit 12 sends control signal d under this operating mode, and g opens 2.0ms with hydrogen nozzle 7, and oxygen jet 6 is opened 1.3ms.At this moment; It is 3.2ppm that NOx sensor 4 detects reduction catalyst converter 9 back NOx concentration; The CO concentration that CO sensor 5 detects behind the oxidation catalyzer 8 is 3.8ppm; NOx sensor 4 and CO sensor 5 are through sending signal e, and f sends detected NOx and CO concentration to electronic control unit 12 respectively.At this moment, because NOx and CO concentration all are higher than 2ppm, thereby electronic control unit 12 judgements need to strengthen the generation of the injection pulse width of hydrogen and oxygen jet with further minimizing noxious emission.At this moment, electronic control unit 12 increases to 3.0ms through sending signal d with the injection pulse width of hydrogen nozzle 6, and through sending control signal g the oxygen lancing pulsewidth is increased to 2.3ms.Behind the change injection pulse width, the NOx concentration that NOx sensor 4 detects behind the reduction catalyst converter 9 is 1.2ppm, and the CO concentration that CO sensor 5 detects behind the oxidation catalyzer 8 is 1.1ppm.NOx sensor 4 and CO sensor 5 are through sending signal e, and f sends detected NOx and CO concentration to electronic control unit 12 respectively.At this moment, because NOx and CO concentration all are higher than 2ppm, thereby electronic control unit 12 judges that the injection pulse width of hydrogen and oxygen jet should remain unchanged.Internal-combustion engine moves 10min under experimental condition, the mean concentration of the various main noxious emissions of detected former machine is respectively HC concentration 102ppm, CO concentration 125ppm, and NOx concentration is 54ppm, smoke opacity is 19.1%; Under the equal conditions; After having installed tail gas control system provided by the present invention additional, the mean concentration of the various main noxious emissions in the internal combustion engine operation 10min is respectively HC concentration 2.1ppm, CO concentration 1.2ppm; NOx concentration is 1.9ppm, and smoke opacity is 3.1%.
2) petrol engine experiment (379 ℃ of air outlet flue temperature)
Petrol engine experiment is 1500r/min in engine speed, torque be under the condition of 80Nm this device of checking to the effect of improving of gasoline exhaust.Under this rotating speed and torque, it is 379 ℃ that electronic control unit 12 obtains exhaust temperature signal c from exhaust gas temperature sensor 11, thereby judges that hydrogen nozzle 6 and oxygen jet 7 can spray hydrogen respectively and oxygen is handled diesel engine vent gas.It is 1.8ms that electronic control unit 12 calculates the basic injection pulse width of hydrogen according to the fast signal a that is obtained and air flow rate signal b and formula 2; The basic injection pulse width of oxygen is 1.2ms; Therefore; Electronic control unit 12 sends control signal d under this operating mode, and g opens 1.8ms with hydrogen nozzle 7, and oxygen jet 6 is opened 1.2ms.At this moment; It is 5.3ppm that NOx sensor 4 detects reduction catalyst converter 9 back NOx concentration; The CO concentration that CO sensor 5 detects behind the oxidation catalyzer 8 is 2.7ppm; NOx sensor 4 and CO sensor 5 are through sending signal e, and f sends detected NOx and CO concentration to electronic control unit 12 respectively.At this moment, because NOx and CO concentration all are higher than 2ppm, thereby electronic control unit 12 judgements need to strengthen the generation of the injection pulse width of hydrogen and oxygen jet with further minimizing noxious emission.At this moment, electronic control unit 12 increases to 1.8ms through sending signal d with the injection pulse width of hydrogen nozzle 6, and through sending control signal g the oxygen lancing pulsewidth is increased to 1.2ms.Behind the change injection pulse width, the NOx concentration that NOx sensor 4 detects behind the reduction catalyst converter 9 is 1.9ppm, and the CO concentration that CO sensor 5 detects behind the oxidation catalyzer 8 is 1.8ppm.NOx sensor 4 and CO sensor 5 are through sending signal e, and f sends detected NOx and CO concentration to electronic control unit 12 respectively.At this moment, because NOx and CO concentration all are higher than 2ppm, thereby electronic control unit 12 judges that the injection pulse width of hydrogen and oxygen jet should remain unchanged.Internal-combustion engine moves 10min under experimental condition, the mean concentration of the various main noxious emissions of detected former machine is respectively HC concentration 203ppm, CO concentration 197ppm, and NOx concentration is 86ppm; Under the equal conditions, installed tail gas control system provided by the present invention additional after, the mean concentration of the various main noxious emissions in the internal combustion engine operation 10min is respectively HC concentration 1.7ppm, CO concentration 1.1ppm, NOx concentration is 1.7ppm.
Above-mentioned internal combustion engine bench test result shows; Adopt a kind of device and method that utilizes hydrogen, oxygen closed loop control engine exhaust provided by the invention, the HC that can be under different operating modes be produced during to petrol engine and two kinds of typical internal combustion engine operations of diesel engine, CO, NOx and granular material discharged plays significant improvement effect.
Claims (2)
1. a device that utilizes hydrogen, oxygen closed loop control engine exhaust is characterized in that: comprise original internal-combustion engine and internal-combustion engine vent-pipe on the automobile;
It also comprises the exhaust gas temperature sensor that is installed on the internal-combustion engine vent-pipe; Be installed in reduction catalyst converter and oxidation catalyzer on the internal-combustion engine vent-pipe; Be installed on the internal-combustion engine vent-pipe and be positioned at the hydrogen nozzle before the reduction catalyst converter; Be installed on the internal-combustion engine vent-pipe and be positioned at the oxygen jet before the oxidation catalyzer, be installed on the internal-combustion engine vent-pipe and be positioned at reduction catalyst converter after the NOx sensor, be installed on the internal-combustion engine vent-pipe and be positioned at oxidation catalyzer after the CO sensor; The hydrogen of system oxyhydrogen machine is connected with hydrogen storage tank and oxygen storage tank respectively with oxygen outlet, and the hydrogen nozzle is connected with hydrogen storage tank and oxygen storage tank respectively with oxygen jet;
Electronic control unit obtains tach signal a and air flow rate signal b through linking to each other with former machine sensor;
Electronic control unit obtains Tail Pipe Temperature signal c through linking to each other with exhaust gas temperature sensor;
Electronic control unit obtains NOx sensor signal e and CO sensor signal f respectively through linking to each other with NOx sensor and CO sensor;
Electronic control unit sends hydrogen nozzle control signal d and oxygen jet control signal g respectively through linking to each other with hydrogen nozzle and oxygen jet.
2. according to the said a kind of controlling method of utilizing hydrogen, oxygen closed loop control engine exhaust device of claim 1, it is characterized in that this method comprises the steps:
The above-mentioned device that utilizes hydrogen, oxygen closed loop control engine exhaust is when operation, and the system oxyhydrogen machine is stored in hydrogen that makes and oxygen in hydrogen storage tank and the oxygen storage tank; Electronic control unit obtains the Tail Pipe Temperature signal c from exhaust gas temperature sensor, and judges according to delivery temperature whether hydrogen and oxygen jet are opened; When Tail Pipe Temperature was lower than the catalyzer initiation temperature, this moment, electronic control unit sent hydrogen nozzle control signal d and oxygen jet control signal g is closed hydrogen nozzle and oxygen jet; When Tail Pipe Temperature is higher than the catalyzer initiation temperature; Electronic control unit sends hydrogen nozzle control signal d and oxygen jet control signal g is opened hydrogen nozzle and oxygen jet; And calculate the basic emitted dose of hydrogen and oxygen under different rotating speeds, load and the excess air coefficient and revise emitted dose according to tach signal a, air flow rate signal b, NOx sensor signal e and CO sensor signal f; And the opening and closing of control hydrogen nozzle and oxygen jet; Make HC, CO and particulate matter in oxidation catalyzer by dioxygen oxidation Cheng Shui and carbon dioxide, and make NOx in reduction catalyst converter, be reduced into the nitrogen G&W;
Addition obtains every circulation actual ejection pulsewidth of hydrogen that electronic control unit is controlled and oxygen jet with the correction injection pulse width by its basic injection pulse width separately respectively;
The calculating of hydrogen and the basic injection pulse width of oxygen: electronic control unit is according to tach signal a and air flow rate signal b and according to t
H2, b=15m
a/ (ρ
a* V
d* N) [formula 1] and t
O2, b=9.75m
a/ (ρ
a* V
d* N) [formula 2] calculate the basic injection pulse width of hydrogen and oxygen; In formula 1 and the formula 2, t
H, b and t
O, b is respectively the basic injection pulse width ms of hydrogen and oxygen, m
aBe the MAF signal that obtains from air flow rate signal c, ρ
aBe air density, V
dBe engine swept volume, N is the internal-combustion engine rotational speed that obtains from tach signal b; When engine load strengthens; The oxyhydrogen gas electronic control unit makes more hydrogen and oxygen in reduction catalyst converter and oxidation catalyzer, HC, CO, NOx and particulate matter fully are converted into water, carbon dioxide and nitrogen according to the injection pulse width that the result who utilizes formula 1 and formula 2 to be calculated strengthens hydrogen and oxygen automatically;
The calculating of hydrogen and oxygen correction injection pulse width: electronic control unit is confirmed the correction injection pulse width signal of hydrogen and oxygen respectively according to detected NOx sensor signal e and CO sensor signal f; When the NOx concentration of the detected NOx sensor signal of electronic control unit e indication after reduction catalyst converter catalysis is higher than ppm; Electronic control unit is through sending the opening time of hydrogen nozzle control signal d prolongation hydrogen nozzle; Make more hydrogen enter into reduction catalyst converter, with effective reducing NOx emissions; When the detected NOx sensor signal of the electronic control unit e indication NOx concentration after reduction catalyst converter catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit remains unchanged the opening time of hydrogen nozzle through sending hydrogen nozzle control signal d; At this moment, reduction catalyst converter effectively is converted into N with NOx; When the detected NOx sensor signal of the electronic control unit e indication NOx concentration after reduction catalyst converter catalysis during less than 1ppm; Electronic control unit reduces the opening time of hydrogen nozzle through sending hydrogen nozzle control signal d; Avoiding too much hydrogen to be injected in the reduction catalyst converter, thereby reduce waste to hydrogen; Simultaneously; When the CO concentration of the detected CO sensor signal of electronic control unit f indication after oxidation catalyzer catalysis is higher than 2ppm; Electronic control unit is through sending the opening time of oxygen jet control signal g prolongation oxygen jet; Make more oxygen enter into oxidation catalyzer, with the efficient oxidation CO, HC and granular material discharged; When the detected CO sensor signal of the electronic control unit f indication CO concentration after oxidation catalyzer catalysis during smaller or equal to 2ppm and more than or equal to 1ppm; Electronic control unit remains unchanged the opening time of oxygen jet through sending oxygen jet control signal g; At this moment, oxidation catalyzer effectively is converted into CO and water with CO, HC and particulate matter; When the detected CO sensor signal of the electronic control unit f indication CO concentration after oxidation catalyzer catalysis during less than ppm, electronic control unit reduces the opening time of oxygen jet through sending oxygen jet control signal g.
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| CN106285865A (en) * | 2016-11-12 | 2017-01-04 | 顺德职业技术学院 | Automobile exhaust emission system |
| CN109140494A (en) * | 2018-09-06 | 2019-01-04 | 佛山市顺德区美的洗涤电器制造有限公司 | For determining the method, apparatus and storage medium of the combustor parameter of gas-cooker |
| CN109184857A (en) * | 2018-10-23 | 2019-01-11 | 武汉布朗环境能源有限公司 | A kind of efficient detonation cleaning and regeneration method of DPF, control system and device |
| CN109675437A (en) * | 2019-01-10 | 2019-04-26 | 中氢新能技术有限公司 | A kind of preparing hydrogen by reforming methanol gas emission device |
| CN111195481A (en) * | 2020-02-13 | 2020-05-26 | 长安大学 | Volatile organic pollutant purification device and method |
| CN113565600A (en) * | 2020-10-12 | 2021-10-29 | 长城汽车股份有限公司 | Vehicle exhaust gas treatment system and method and vehicle |
| CN115217584A (en) * | 2022-03-01 | 2022-10-21 | 广州汽车集团股份有限公司 | Exhaust gas treatment device and exhaust gas treatment method for hydrogen engine, and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05168856A (en) * | 1991-05-24 | 1993-07-02 | Toyota Central Res & Dev Lab Inc | Method for decreasing nitrogen oxide in internal combustion engine and equipment therefor |
| JPH06307232A (en) * | 1993-04-20 | 1994-11-01 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
| US20070274892A1 (en) * | 2001-06-12 | 2007-11-29 | Daimlerchrysler Ag | Exhaust Gas Purification Unit with Reducing Agent Supply |
| CN101575999A (en) * | 2009-06-22 | 2009-11-11 | 哈尔滨工程大学 | Hydrogen selective catalytic reduction device and control method thereof |
| CN101956634A (en) * | 2010-09-10 | 2011-01-26 | 北京工业大学 | Device for preparing, storing and feeding vehicle-mounted hydrogen/oxygen and control method thereof |
| CN102155278A (en) * | 2011-03-25 | 2011-08-17 | 北京工业大学 | Vehicle-mounted oxyhydrogen-making machine-based internal-combustion engine emission control device and control method thereof |
-
2012
- 2012-04-26 CN CN2012101275407A patent/CN102635429B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05168856A (en) * | 1991-05-24 | 1993-07-02 | Toyota Central Res & Dev Lab Inc | Method for decreasing nitrogen oxide in internal combustion engine and equipment therefor |
| JPH06307232A (en) * | 1993-04-20 | 1994-11-01 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
| US20070274892A1 (en) * | 2001-06-12 | 2007-11-29 | Daimlerchrysler Ag | Exhaust Gas Purification Unit with Reducing Agent Supply |
| CN101575999A (en) * | 2009-06-22 | 2009-11-11 | 哈尔滨工程大学 | Hydrogen selective catalytic reduction device and control method thereof |
| CN101956634A (en) * | 2010-09-10 | 2011-01-26 | 北京工业大学 | Device for preparing, storing and feeding vehicle-mounted hydrogen/oxygen and control method thereof |
| CN102155278A (en) * | 2011-03-25 | 2011-08-17 | 北京工业大学 | Vehicle-mounted oxyhydrogen-making machine-based internal-combustion engine emission control device and control method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019990B (en) * | 2014-01-14 | 2019-02-22 | 通用电气公司 | System and method for controlling the discharge in engine |
| CN105019990A (en) * | 2014-01-14 | 2015-11-04 | 通用电气公司 | System and method for controlling emissions in an engine |
| CN106285865A (en) * | 2016-11-12 | 2017-01-04 | 顺德职业技术学院 | Automobile exhaust emission system |
| WO2018086189A1 (en) * | 2016-11-12 | 2018-05-17 | 顺德职业技术学院 | Automobile exhaust gas emission system |
| CN109140494A (en) * | 2018-09-06 | 2019-01-04 | 佛山市顺德区美的洗涤电器制造有限公司 | For determining the method, apparatus and storage medium of the combustor parameter of gas-cooker |
| CN109184857B (en) * | 2018-10-23 | 2020-09-15 | 武汉布朗环境能源有限公司 | DPF efficient detonation cleaning regeneration method, control system and device |
| CN109184857A (en) * | 2018-10-23 | 2019-01-11 | 武汉布朗环境能源有限公司 | A kind of efficient detonation cleaning and regeneration method of DPF, control system and device |
| CN109675437A (en) * | 2019-01-10 | 2019-04-26 | 中氢新能技术有限公司 | A kind of preparing hydrogen by reforming methanol gas emission device |
| CN109675437B (en) * | 2019-01-10 | 2024-05-07 | 中氢新能技术有限公司 | Tail gas emission device for hydrogen production by methanol reforming |
| CN111195481A (en) * | 2020-02-13 | 2020-05-26 | 长安大学 | Volatile organic pollutant purification device and method |
| CN113565600A (en) * | 2020-10-12 | 2021-10-29 | 长城汽车股份有限公司 | Vehicle exhaust gas treatment system and method and vehicle |
| CN115217584A (en) * | 2022-03-01 | 2022-10-21 | 广州汽车集团股份有限公司 | Exhaust gas treatment device and exhaust gas treatment method for hydrogen engine, and vehicle |
| CN115217584B (en) * | 2022-03-01 | 2024-03-08 | 广州汽车集团股份有限公司 | Exhaust gas treatment device and exhaust gas treatment method for hydrogen engine, and vehicle |
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