CN111648843A - Temperature control mechanism of three-way catalyst of gasoline generating set and control method thereof - Google Patents
Temperature control mechanism of three-way catalyst of gasoline generating set and control method thereof Download PDFInfo
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- CN111648843A CN111648843A CN202010514949.9A CN202010514949A CN111648843A CN 111648843 A CN111648843 A CN 111648843A CN 202010514949 A CN202010514949 A CN 202010514949A CN 111648843 A CN111648843 A CN 111648843A
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- way catalyst
- heat pipe
- thermal switch
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- 239000003054 catalyst Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
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- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000003584 silencer Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
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- 101000760620 Homo sapiens Cell adhesion molecule 1 Proteins 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
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- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
- F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
- F01N3/046—Exhaust manifolds with cooling jacket
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02T10/12—Improving ICE efficiencies
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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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a temperature control mechanism for a three-way catalyst of a gasoline generating set, which comprises an exhaust manifold, an exhaust pipe and the three-way catalyst, wherein the exhaust manifold is communicated with the three-way catalyst through the exhaust pipe, exhaust manifold water jackets are respectively arranged on the exhaust manifold and the exhaust pipe, a coating sleeve is arranged on the three-way catalyst, a heat pipe is arranged at an exhaust outlet of an engine cylinder body, one end of the heat pipe is communicated with the exhaust outlet of the engine cylinder body, the other end of the heat pipe is communicated with the coating sleeve on the three-way catalyst, and high-temperature gas at the exhaust outlet of the engine cylinder body is transmitted to the coating sleeve through the heat. The invention adds the exhaust manifold water jacket to cover the original exhaust manifold, so that the original exhaust manifold of the engine is changed into the water-cooling exhaust manifold, thereby reducing the exhaust temperature at the outlet of the silencer, simultaneously reducing the internal temperature of the unit and protecting the internal components of the unit. The invention also provides a control method of the temperature control mechanism for the three-way catalyst of the gasoline generator set.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a temperature control mechanism for a three-way catalyst of a gasoline generator set and a control method thereof.
Background
A gasoline generator set is a device that converts the heat energy of fuel (gasoline) into mechanical energy and drives a generator to convert the mechanical energy into electric energy. When the engine works, air and fuel are mixed into mixed gas by the air inlet mechanism, and then the mixed gas enters the combustion chamber to be combusted and do work and is discharged. The emission requirements of generator sets are becoming more and more strict in national GB26133-2010 emission limit value of small spark-ignition engines for non-road mobile machinery and measurement methods (the first and second stages in China), and the emission limit value becomes an important bottleneck restricting the development of the industry.
It is known that the tail gas of the gasoline engine is mainly exhausted to the atmosphere after passing through an exhaust manifold → a three-way catalyst → a silencer, but the application of the gasoline engine to a generator set is in a very embarrassing situation.
The function of the three-way catalyst is to convert harmful gas exhausted after the combustion of the engine into harmless gas and then exhaust the harmless gas to the atmosphere; the internal structure of the three-way catalyst is a honeycomb pipeline design, and the wall of the honeycomb pipeline is provided with a coating of noble metal elements such as platinum, rhodium, palladium and the like as a catalytic reaction medium. The catalyst in the three-way catalyst may promote the oxidation reaction of Hydrocarbons (HC) and carbon monoxide (CO), converting them to water vapor (H2O) and carbon dioxide (CO2), respectively; while reducing nitrogen oxides (NOx) to nitrogen (N2).
The three-way catalyst is limited by its material properties, the zirconia element must be heated (>300 ℃) to be activated and the purification effect is optimal at 375 ℃ -800 ℃. The normal gasoline engine exhaust manifold pre-vortex operating temperature is between 500 ℃ and 800 ℃. In order to ensure the reaction temperature of the three-way catalyst, the traditional exhaust mode has the following defects: (1) the exhaust temperature of the outlet of the silencer can reach 700 ℃ at most when the exhaust temperature reaches the rated power under the condition of no load, so that great potential safety hazard is brought to users of the generator set; (2) when the generator set is under heavy load, the temperature of the external environment is high, and ventilation is poor, the temperature of the three-way catalyst can be kept above 700 ℃ all the time, so that front and rear connecting flanges and connecting bolts of the three-way catalyst are greatly damaged, warping deformation is easy to occur, exhaust gas leakage is caused, and the power of an engine is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a temperature control mechanism for a three-way catalyst of a gasoline generating set, which has a simple structure and is convenient to use, and also provides a control method of the temperature control mechanism.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a temperature control mechanism for gasoline generating set three way catalyst converter, includes exhaust manifold, blast pipe and three way catalyst converter, and exhaust manifold passes through blast pipe and three way catalyst converter intercommunication, its characterized in that: exhaust manifold water jackets are arranged on the exhaust manifold and the exhaust pipe, a coating sleeve is arranged on the three-way catalyst, a heat pipe is arranged at the exhaust outlet of the engine cylinder body, one end of the heat pipe is communicated with the exhaust outlet of the engine cylinder body, the other end of the heat pipe is communicated with the coating sleeve on the three-way catalyst, and high-temperature gas at the exhaust outlet of the engine cylinder body is transferred to the coating sleeve through the heat pipe to heat the three-way catalyst.
Further, the temperature control mechanism further comprises a temperature sensor ST1 and a temperature sensor ST2, the temperature sensor ST1 is arranged on a pipeline of the exhaust manifold communicated with the three-way catalyst and is positioned in front of an inlet of the three-way catalyst, and the temperature sensor ST2 is arranged in the three-way catalyst.
Furthermore, a thermal switch controller and an output heat pipe are arranged between the heat pipe and the coating sleeve on the three-way catalytic converter, one end of the thermal switch controller is connected with the heat pipe, the other end of the thermal switch controller is connected with the output heat pipe, and the output heat pipe is communicated with the coating sleeve on the three-way catalytic converter.
Furthermore, the coating sleeve is of a heat pipe spiral structure, the heat pipe spiral structure is communicated with the output heat pipe, and the coating sleeve is spirally wound on the three-way catalyst.
Further, the heat pipes comprise 1 cylinder heat pipe, 2 cylinder heat pipes, 3 cylinder heat pipes and 4 cylinder heat pipes, wherein the 1 cylinder heat pipe, the 2 cylinder heat pipes, the 3 cylinder heat pipes and the 4 cylinder heat pipes are respectively communicated with four cylinders of the engine.
Furthermore, the thermal switch controller comprises a 1-cylinder thermal switch, a 2-cylinder thermal switch, a 3-cylinder thermal switch and a 4-cylinder thermal switch, one end of the 1-cylinder thermal switch, one end of the 2-cylinder thermal switch, one end of the 3-cylinder thermal switch and one end of the 4-cylinder thermal switch are respectively communicated with the 1-cylinder heat pipe, the 2-cylinder heat pipe, the 3-cylinder heat pipe and the 4-cylinder heat pipe, and the other ends of the 1-cylinder thermal switch, the 2-cylinder thermal switch, the 3-cylinder thermal switch and the 4-cylinder thermal switch are converged and communicated with the output.
Furthermore, the three-way catalytic converter is externally provided with a heat insulation coating, and the three-way catalytic converter and the coating sleeve are both arranged in the heat insulation coating.
Furthermore, a water jacket inlet pipe and a water jacket outlet pipe are arranged on the exhaust manifold water jacket, the water jacket inlet pipe is provided with an adjusting valve for adjusting water inflow, the water jacket outlet pipe is provided with a temperature sensor ST3 for detecting the temperature of water, and the water jacket inlet pipe and the water jacket outlet pipe are connected with a generator set cooler.
The invention also relates to a control method of the temperature control mechanism for the three-way catalyst of the gasoline generator set, which is characterized by comprising the following steps: the control method comprises the steps of controlling the regulating valve and controlling the thermal switch controller, wherein the temperature sensor ST3 monitors the water outlet temperature, the opening of the regulating valve is regulated according to the water outlet temperature and the running state of the unit, the water inlet quantity of the exhaust manifold water jacket is regulated, and the water outlet temperature of the exhaust manifold water jacket (1) is controlled to be 80-85 ℃.
Further, the control of the thermal switch controller (4) comprises the following steps:
a. when the temperature detected by the temperature sensor ST1 is between 100 ℃ and 375 ℃, the thermal switch controller is switched on;
b. when the temperature sensor ST2 detects that the temperature in the three-way catalyst is lower than 350 ℃, the 1-cylinder thermal switch, the 2-cylinder thermal switch, the 3-cylinder thermal switch and the 4-cylinder thermal switch are all in a closed state, and high-temperature gas exhausted by the engine cylinder body is led to a coating sleeve on the three-way catalyst through the 1-cylinder heat pipe, the 2-cylinder heat pipe, the 3-cylinder heat pipe and the 4-cylinder heat pipe to heat the three-way catalyst; when the temperature sensor ST2 detects that the temperature in the three-way catalyst is higher than 500 ℃, the 1-cylinder thermal switch, the 2-cylinder thermal switch, the 3-cylinder thermal switch and the 4-cylinder thermal switch are all in an off state;
c. when the temperature sensor ST2 detects that the temperature in the three-way catalyst is between 350 ℃ and 400 ℃, the 1-cylinder thermal switch, the 2-cylinder thermal switch and the 3-cylinder thermal switch are closed, the 4-cylinder thermal switch is opened, and high-temperature gas exhausted by the engine cylinder body is led to a coating sleeve on the three-way catalyst through the 1-cylinder heat pipe, the 2-cylinder heat pipe and the 3-cylinder heat pipe to heat the three-way catalyst.
d. When the temperature sensor ST2 detects that the temperature in the three-way catalyst is between 400 ℃ and 450 ℃, the 1-cylinder thermal switch and the 2-cylinder thermal switch are closed, the 3-cylinder thermal switch and the 4-cylinder thermal switch are disconnected, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve on the three-way catalyst through the 1-cylinder heat pipe and the 2-cylinder heat pipe to heat the three-way catalyst.
e. When the temperature sensor ST2 detects that the temperature in the three-way catalyst is between 450 ℃ and 400 ℃, the 1-cylinder thermal switch is closed, the 2-cylinder thermal switch, the 3-cylinder thermal switch and the 4-cylinder thermal switch are disconnected, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve on the three-way catalyst through the 1-cylinder heat pipe to heat the three-way catalyst.
The technical scheme adopted by the invention has the advantages that:
the exhaust manifold is coated by the water jacket, so that the surface temperature of the whole exhaust system is relatively low, and the safety in the unit is greatly improved; by utilizing the super-strong heat conduction capability of the heat pipe, the ternary catalysis can be heated to the optimal reaction temperature at the highest speed when the unit is just started, so that the emission is ensured to reach the standard; the arrangement of the heat pipe and the thermal switch controller ensures that the ternary catalysis can be kept at the optimum reaction temperature lower limit in the full-power operation section of the unit, thereby not only exerting the function of the ternary catalyst, but also protecting the equipment safety and the personal safety to the maximum extent. The invention combines the heat pipe and thermal switch technology with the original exhaust system of the engine, thereby avoiding the adverse effect caused by the change of the working condition when the original three-way catalyst is applied to the gasoline generator set.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic structural diagram of a temperature control mechanism according to the present invention;
FIG. 2 is a first schematic diagram of the control logic of the present invention;
FIG. 3 is a second schematic diagram of the control logic of the present invention;
FIG. 4 is a diagram of the pins of the main controller according to the present invention;
fig. 5 is a circuit diagram of the connection of the components of the present invention.
The labels in the above figures are respectively: 1. an exhaust manifold water jacket; 2. an engine block exhaust outlet; 3. a heat pipe; 31. 1 cylinder heat pipe; 32. 2, a cylinder heat pipe; 33. 3 cylinder heat pipes; 34. 4 cylinder heat pipes; 4. a thermal switch controller; 41. 1, cylinder thermal switch; 42. 2, a cylinder thermal switch; 43. 3, a cylinder thermal switch; 44. 4 cylinder thermal switch.
Detailed Description
In the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, a temperature control mechanism for a three-way catalyst of a gasoline generating set includes an exhaust manifold 14, an exhaust pipe 13 and a three-way catalyst 5, the exhaust manifold 14 is communicated with the three-way catalyst 5 through the exhaust pipe 13, and the temperature control mechanism is characterized in that: the exhaust manifold 14 and the exhaust pipe 13 are both provided with an exhaust manifold water jacket 1, the three-way catalyst 5 is provided with a coating sleeve 6, the exhaust outlet 2 of the engine cylinder body is provided with a heat pipe 3, one end of the heat pipe 3 is communicated with the exhaust outlet 2 of the engine cylinder body, the other end of the heat pipe 3 is communicated with the coating sleeve 6 on the three-way catalyst 5, and high-temperature gas at the exhaust outlet 2 of the engine cylinder body is transmitted to the coating sleeve 6 through the heat pipe 3 to heat the three-way catalyst 5. The invention adds the exhaust manifold water jacket 1 to cover the original exhaust manifold and the exhaust pipe, changes the original exhaust manifold of the 3-engine into the water-cooling exhaust manifold, thus reducing the exhaust temperature at the outlet of the silencer, simultaneously reducing the internal temperature of the unit and protecting the internal components of the unit.
The exhaust manifold water jacket 1 is provided with a water jacket inlet pipe 11 and a water jacket outlet pipe 12, the water jacket inlet pipe 11 is provided with an adjusting valve 111 for adjusting the water inflow, the water jacket outlet pipe 12 is provided with a temperature sensor ST3121 for detecting the water temperature, and the water jacket inlet pipe 11 and the water jacket outlet pipe 12 are connected with a generator set cooler. The regulating valve 111 is an electric regulating valve, an electric regulating valve is additionally arranged on the water inlet pipe 1 of the cooling water jacket 3, an outlet water temperature sensor ST3 is arranged on the water outlet pipe of the exhaust manifold water jacket 1 to monitor the outlet water temperature, the opening of the electric regulating valve is regulated according to the outlet water temperature and the running state (actually carried load) of the generator set, the inlet water quantity of the exhaust manifold water jacket is regulated to achieve the purpose of temperature control, the outlet water temperature is controlled to be 80-85 ℃, and the inlet and outlet water pipes of the exhaust manifold water jacket are connected with a generator set cooler.
Because the water jacket of the exhaust manifold is very long, if the water jacket is kept fully open for a long time, the cooling effect on the exhaust temperature is obvious, and a, when the unit is unloaded and has low load, the exhaust temperature is too low, so that the three-way catalyst is not beneficial to heating to an optimal reaction temperature range at the highest speed; b. when the unit is in no-load and low-load, the temperature of the cooling liquid is too low to be beneficial to normal operation of the engine (the normal working temperature of the engine is 80-90 ℃); c. the stability of the whole cooling system of the generator set is facilitated, the temperature of the cooling liquid is kept in a relatively stable temperature range, the cooling fan does not need to be started or stopped frequently, the service life of the fan is prolonged, the electric energy consumed in the generator set by frequently starting and stopping the fan is large, and the electric energy consumed in the generator set can be reduced.
A heat switch controller 4 and an output heat pipe 9 are arranged between the heat pipe 3 and the coating sleeve 6 on the three-way catalyst 5, one end of the heat switch controller 4 is connected with the heat pipe 3, the other end of the heat switch controller 4 is connected with the output heat pipe 9, and the output heat pipe 9 is communicated with the coating sleeve 6 on the three-way catalyst 5.
The coating sleeve 6 is a heat pipe spiral structure, the heat pipe spiral structure is communicated with the output heat pipe 9, and the coating sleeve 6 is spirally wound on the three-way catalyst 5. The three-way catalyst 5 is provided with a heat insulation coating 10 on the outside, and the three-way catalyst 5 and the coating sleeve 6 are both arranged in the heat insulation coating 10.
The heat pipe 3 comprises a 1-cylinder heat pipe 31, a 2-cylinder heat pipe 32, a 3-cylinder heat pipe 33 and a 4-cylinder heat pipe 34, and the 1-cylinder heat pipe 31, the 2-cylinder heat pipe 32, the 3-cylinder heat pipe 33 and the 4-cylinder heat pipe 34 are respectively communicated with four cylinders of the engine. The thermal switch controller 4 comprises a 1-cylinder thermal switch 41, a 2-cylinder thermal switch 42, a 3-cylinder thermal switch 43 and a 4-cylinder thermal switch 44, one end of the 1-cylinder thermal switch 41, one end of the 2-cylinder thermal switch 42, one end of the 3-cylinder thermal switch 43 and one end of the 4-cylinder thermal switch 44 are respectively communicated with the 1-cylinder heat pipe 31, the 2-cylinder heat pipe 32, the 3-cylinder heat pipe 33 and the 4-cylinder heat pipe 34, and the other ends of the 1-cylinder thermal switch 41, the 2-cylinder thermal switch 42, the 3-cylinder thermal switch 43 and the 4-cylinder thermal switch 44 are converged and communicated with. The invention introduces the heat pipe and thermal switch technology, utilizes the good heat conduction capability of the heat pipe and the temperature difference between the exhaust port of the engine and the three-way catalyst to quickly conduct heat and quickly heat the surface of the three-way catalyst.
The heat pipes 3 are respectively led out from the exhaust outlets of the cylinders 1-4 of the engine, the outer surface of the three-way catalyst 5 is coated with a heat pipe spiral structure through the heat switch controller 4 and the output heat pipe 9, the temperature of the exhaust outlets of the cylinders 1-4 of the engine is quickly conducted to the three-way catalyst, the three-way catalyst is heated and heated, and the outer surface of the three-way catalyst is coated with heat insulation 10, so that the three-way catalyst can quickly reach the optimal reaction temperature. Has the following advantages: 【1】 The heat pipe technology is a heat transfer element called a heat pipe invented by George Grover of national laboratory of Los Alamos (Los Alamos) in 1963, fully utilizes the heat conduction principle and the rapid heat transfer property of a phase change medium, quickly transfers the heat of a heating object to the outside of a heat source through the heat pipe, and the heat conduction capability of the heat transfer element exceeds the heat conduction capability of any known metal; 【2】 The thermal contact or thermal separation of the leading-out heat pipe 3 and the output heat pipe 9 of the 1-4 cylinders can be respectively controlled by a thermal switch controller, so that the purpose of controlling the heating and temperature rising speed of the three-way catalyst is achieved; 【3】 The spiral structure cladding of heat pipe does benefit to the temperature gathering, and difficult diffusion improves the utilization ratio of heat pipe conduction heat energy.
The above temperature control mechanism further includes a temperature sensor ST17 and a temperature sensor ST28, the temperature sensor ST17 being provided on a duct through which the exhaust manifold communicates with the three-way catalyst 5 and located in front of the inlet of the three-way catalyst 5 for detecting the temperature of the gas directly entering the three-way catalyst 5 from the exhaust manifold, and the temperature sensor ST28 being provided in the three-way catalyst 5 for detecting the temperature inside the three-way catalyst 5. Before entering the three-way catalyst, the three-way catalyst body and the temperature sensor are arranged to be used as signal input of a controller, and the controller is preferably a PLC (programmable logic controller). The temperature detection results of the temperature sensor ST17 and the temperature sensor ST28 enter the controller for operation, and control the on and off of the 1-cylinder thermal switch 41, the 2-cylinder thermal switch 42, the 3-cylinder thermal switch 43 and the 4-cylinder thermal switch 44, namely control the on and off of the transmission of the 1-cylinder heat pipe 31, the 2-cylinder heat pipe 32, the 3-cylinder heat pipe 33 and the 4-cylinder heat pipe 34. The preferred thermal switch can be selected to be a gas switch, a mechanical switch, a superconducting switch and a magnetic thermal switch according to actual requirements, and because the catalytic efficiency is highest in a temperature range of 375-800 ℃ of the three-way catalyst, the temperature of the temperature sensor ST28 is ensured to keep the three-way catalyst always at the optimal working temperature lower limit, and meanwhile, the exhaust temperature at the outlet of the silencer of the unit can be further controlled.
A temperature sensor ST17 for detecting the temperature of exhaust gas before three-way catalysis is arranged on the side of an exhaust pipe 13 close to the three-way catalyst, a temperature sensor ST28 for detecting the temperature of the three-way catalyst is arranged in the three-way catalyst 5, a mathematical model is established for the temperature detection data of the temperature sensor ST17 and the temperature sensor ST28, the target temperature of the temperature sensor ST17 and the running state (actually carried load) of a unit through a main controller, the numerical value is calculated through weighting calculation and is used as a judgment basis to control the conduction state of each cylinder thermal switch in a thermal switch controller), and therefore the three-way catalyst can be controlled to work in the temperature interval range of 400-450 ℃ all the time. Has the following advantages: 【1】 Because the temperature of the three-way catalyst is 375-800 ℃, the catalytic efficiency is highest, the ST2 temperature is ensured to keep the three-way catalyst always at the lower limit of the optimal working temperature, and the exhaust temperature at the outlet of the silencer of the unit can be further controlled; 【2】 The system carries out calculation by establishing a mathematical model, controls the on and off of the thermal switch controller, and is more scientific and has more prejudgement.
The operating state (actually carried load) of the unit is used as the control basis of the regulating valve 111 and the thermal switch controller 4, because the temperature of the cooling liquid or the temperature of the exhaust gas can delay the system, if the temperature is used as the judgment basis, the stability of the temperature control system can not be ensured all the time, the temperature of the cooling liquid and the temperature of the exhaust gas have direct relation with the load carried by the engine, and the optimal measurement standard reflecting the actual load carried by the unit is the actual operating current of the unit, so that the change of the temperature of the cooling liquid and the temperature of the exhaust gas lags behind the change of the current, and the change of the current is used as the calculation basis, thereby improving the prejudgment of the temperature control system and improving the stability of the temperature.
The invention also provides a control method of the temperature control mechanism for the three-way catalyst of the gasoline generator set, which is characterized by comprising the following steps: the control method comprises the steps of controlling the regulating valve 111 and the thermal switch controller 4, monitoring the water outlet temperature by the temperature sensor ST3121, regulating the opening degree of the regulating valve 2 according to the water outlet temperature and the running state of the unit, regulating the water inlet quantity of the exhaust manifold water jacket 1, and controlling the water outlet temperature of the exhaust manifold water jacket 1 to be 80-85 ℃.
The control of the thermal switch controller 4 comprises the following steps: a. the control loop is powered on, and when the temperature detected by the temperature sensor ST17 is between 100 ℃ and 375 ℃, the thermal switch controller 4 is switched on.
b. When the temperature sensor ST28 detects that the temperature in the three-way catalyst is less than 350 ℃, the 1-cylinder thermal switch 41, the 2-cylinder thermal switch 42, the 3-cylinder thermal switch 43 and the 4-cylinder thermal switch 44 are all in a closed state, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve 6 on the three-way catalyst 5 through the 1-cylinder heat pipe 31, the 2-cylinder heat pipe 32, the 3-cylinder heat pipe 33 and the 4-cylinder heat pipe 34 to heat the three-way catalyst 5.
c. When the temperature sensor ST28 detects that the temperature in the three-way catalyst is between 350 ℃ and 400 ℃, the 1-cylinder thermal switch 41, the 2-cylinder thermal switch 42 and the 3-cylinder thermal switch 43 are closed, the 4-cylinder thermal switch 44 is opened, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve 6 on the three-way catalyst 5 through the 1-cylinder heat pipe 31, the 2-cylinder heat pipe 32 and the 3-cylinder heat pipe 33 to heat the three-way catalyst 5.
d. When the temperature sensor ST28 detects that the temperature in the three-way catalyst is between 400 and 450 ℃, the 1-cylinder thermal switch 41 and the 2-cylinder thermal switch 42 are closed, the 3-cylinder thermal switch 43 and the 4-cylinder thermal switch 44 are opened, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve 6 on the three-way catalyst 5 through the 1-cylinder heat pipe 31 and the 2-cylinder heat pipe 32 to heat the three-way catalyst 5.
e. When the temperature sensor ST28 detects that the temperature in the three-way catalyst is between 400 and 450 ℃, the 1-cylinder thermal switch 41 is closed, the 2-cylinder thermal switch 42, the 3-cylinder thermal switch 43 and the 4-cylinder thermal switch 44 are opened, and high-temperature gas exhausted by the engine cylinder block is led to the coating sleeve 6 on the three-way catalyst 5 through the 1-cylinder heat pipe 31 to heat the three-way catalyst 5.
f. When the temperature sensor ST28 detects that the temperature in the three-way catalyst is greater than 500 ℃, the 1-cylinder thermal switch 41, the 2-cylinder thermal switch 42, the 3-cylinder thermal switch 43, and the 4-cylinder thermal switch 44 are all in the off state.
The number of the thermal switches which are opened is gradually reduced along with the rise of the temperature, the temperature rise speed of the three-way catalyst is reduced, and the temperature in the three-way catalyst is accurately controlled. The exhaust manifold is coated by the water jacket, so that the surface temperature of the whole exhaust system is relatively low, and the safety in the unit is greatly improved; by utilizing the super-strong heat conduction capability of the heat pipe, the ternary catalysis can be heated to the optimal reaction temperature at the highest speed when the unit is just started, so that the emission is ensured to reach the standard; the arrangement of the heat pipe and the thermal switch controller ensures that the ternary catalysis can be kept at the optimum reaction temperature lower limit in the full-power operation section of the unit, thereby not only exerting the function of the ternary catalyst, but also protecting the equipment safety and the personal safety to the maximum extent. The invention combines the heat pipe and thermal switch technology with the original exhaust system of the engine, thereby avoiding the adverse effect caused by the change of the working condition when the original three-way catalyst is applied to the gasoline generator set.
The main controller comprises a delay control circuit 1, a delay control circuit 2, a delay control circuit 3, a delay control circuit 4, a delay control circuit 5, a delay control circuit 6, a delay control circuit 7, a storage battery voltage monitoring module, a power supply management module, a temperature acquisition module 1, a temperature acquisition module 2, a temperature acquisition module 3, a current monitoring module, a comparator 1, a comparator 2, a comparator 3, a unit state judgment unit, a control module 1 and a control module 2.
The module that each pin of main control unit connects is: s1: ST3 is connected, and the outlet water temperature is monitored; s2: a unit operation signal; s3: connecting a storage battery; s4: ST1 is switched in, and the front exhaust temperature of the three-way catalyst is monitored; s5, switching in ST2, and monitoring the temperature of the three-way catalyst; s6: a unit load current sensor; s7: connecting an adjusting valve; s8: connecting 1 cylinder thermal switch; s9: 2, connecting a cylinder thermal switch; s10: connecting 3 cylinder thermal switches; s11: connecting 4 cylinder thermal switches; s12: and outputting a power failure signal.
The control of the regulating valve 111 uses PID control for the control module 1.
The control of the thermal switch controller 4 is that the control module 2 adopts a mathematical model to carry out logic operation, the load of a unit is added as weight, and an operation value and 4 preset threshold values n are obtained according to the mathematical model1、n2、n3、n4Comparing to control the output of high and low levels, threshold n1、n2、n3、n4Respectively correspond to 350 ℃, 400 ℃, 450 ℃ and 500 ℃. The PID algorithm is as follows:
in the formula: kpProportional gain, KpIs in reciprocal relation with the proportionality; t ist-an integration time constant; t isD-a differential time constant; u (t) -output signal of PID controller; e (t) -the difference between the given value r (t) and the measured value.
The specific operation logic of the control module 2 is as follows: as shown in FIG. 2, whether the unit is operated or not is judged by the unit judgment unit, when the unit is operated, the target temperature of the unit ST2 is 450 ℃, the front exhaust temperature of the ST1 three-way catalyst and the temperature of the ST2 three-way catalyst are brought into a preset mathematical model in the control module 2 for calculation,
Ts＝λ×γ×(Ttarget-T2)
T(s): output value
λ: load weight factor
γ：(TTarget-T1) Weight coefficient
The larger the value of Ts, the larger the deviation of ST2 from the target temperature, the more heat pipe switches are conducted
When the load is larger, the current is higher, the unit load is larger, and the lambda value is smaller
When the ST1 temperature is higher, the deviation from the target temperature is smaller, and the gamma value is smaller
Because the change rate of the load is faster than that of the exhaust temperature and is in a proportional function relationship, and ST1 is used as the inlet temperature detection of the three-way catalyst, the initial temperature of the three-way catalyst before heating is increased as the temperature of ST1 is higher, in order to increase the pre-judging performance and stability of the mathematical model, the load corresponding weight coefficients lambda (t) and ST1 and the target temperature deviation coefficient gamma (t) are added into the mathematical model, and finally the result T(s) and the preset threshold value n are output1、n2、n3、n4And comparing, and finally taking the comparison result as a judgment condition for switching on and off of the thermal switch controller so as to control the target temperature interval of the three-way catalyst to be 450 +/-50 ℃.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without modification.
Claims (10)
1. The utility model provides a temperature-control mechanism for gasoline generating set three way catalyst converter, includes exhaust manifold (14), blast pipe (13) and three way catalyst converter (5), and exhaust manifold (14) are through blast pipe (13) and three way catalyst converter (5) intercommunication, its characterized in that: exhaust manifold water jackets (1) are arranged on the exhaust manifold (14) and the exhaust pipe (13), a coating sleeve (6) is arranged on the three-way catalyst (5), a heat pipe (3) is arranged at the exhaust outlet (2) of the engine cylinder body, one end of the heat pipe (3) is communicated with the exhaust outlet (2) of the engine cylinder body, the other end of the heat pipe (3) is communicated with the coating sleeve (6) on the three-way catalyst (5), and high-temperature gas at the exhaust outlet (2) of the engine cylinder body is transmitted to the coating sleeve (6) through the heat pipe (3) to heat the three-way catalyst (5).
2. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 1, wherein: the temperature control mechanism further comprises a temperature sensor ST1(7) and a temperature sensor ST2(8), the temperature sensor ST1(7) is arranged on a pipeline of the exhaust manifold communicated with the three-way catalyst (5) and is positioned in front of an inlet of the three-way catalyst (5), and the temperature sensor ST2(8) is arranged in the three-way catalyst (5).
3. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 2, wherein: a heat switch controller (4) and an output heat pipe (9) are arranged between the heat pipe (3) and the coating sleeve (6) on the three-way catalyst (5), one end of the heat switch controller (4) is connected with the heat pipe (3), the other end of the heat switch controller (4) is connected with the output heat pipe (9), and the output heat pipe (9) is communicated with the coating sleeve (6) on the three-way catalyst (5).
4. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 3, wherein: the coating sleeve (6) is of a heat pipe spiral structure, the heat pipe spiral structure is communicated with the output heat pipe (9), and the coating sleeve (6) is spirally wound on the three-way catalyst (5).
5. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 3 or 4, wherein: the heat pipe (3) comprises a 1-cylinder heat pipe (31), a 2-cylinder heat pipe (32), a 3-cylinder heat pipe (33) and a 4-cylinder heat pipe (34), wherein the 1-cylinder heat pipe (31), the 2-cylinder heat pipe (32), the 3-cylinder heat pipe (33) and the 4-cylinder heat pipe (34) are respectively communicated with four cylinders of the engine.
6. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 5, wherein: the thermal switch controller (4) comprises a 1-cylinder thermal switch (41), a 2-cylinder thermal switch (42), a 3-cylinder thermal switch (43) and a 4-cylinder thermal switch (44), one ends of the 1-cylinder thermal switch (41), the 2-cylinder thermal switch (42), the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are respectively communicated with the 1-cylinder heat pipe (31), the 2-cylinder heat pipe (32), the 3-cylinder heat pipe (33) and the 4-cylinder heat pipe (34), and the other ends of the 1-cylinder thermal switch (41), the 2-cylinder thermal switch (42), the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are collected and communicated with the output heat pipe (9).
7. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 6, wherein: the three-way catalytic converter is characterized in that a heat insulation coating (10) is arranged outside the three-way catalytic converter (5), and the three-way catalytic converter (5) and the coating sleeve (6) are both arranged in the heat insulation coating (10).
8. The temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 7, wherein: the exhaust manifold water jacket (1) is provided with a water jacket inlet pipe (11) and a water jacket outlet pipe (12), the water jacket inlet pipe (11) is provided with an adjusting valve (111) for adjusting the water inflow, the water jacket outlet pipe (12) is provided with a temperature sensor ST3(121) for detecting the water temperature, and the water jacket inlet pipe (11) and the water jacket outlet pipe (12) are connected with a generator set cooler.
9. The control method of the temperature control mechanism for the three-way catalyst of the gasoline generator set according to any one of claims 1 to 8, characterized in that: the control method comprises the steps of controlling the regulating valve (111) and controlling the thermal switch controller (4), monitoring the water outlet temperature by the temperature sensor ST3(121), regulating the opening degree of the regulating valve (2) according to the water outlet temperature and the running state of the unit, regulating the water inlet amount of the exhaust manifold water jacket (1), and controlling the water outlet temperature of the exhaust manifold water jacket (1) to be 80-85 ℃.
10. The control method of the temperature control mechanism for the three-way catalyst of the gasoline generating set as claimed in claim 9, characterized in that: the control of the thermal switch controller (4) comprises the following steps:
a. when the temperature detected by the temperature sensor ST1(7) is between 100 ℃ and 375 ℃, the thermal switch controller (4) is switched on;
b. when the temperature sensor ST2(8) detects that the temperature in the three-way catalyst is lower than 350 ℃, the 1-cylinder thermal switch (41), the 2-cylinder thermal switch (42), the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are all in a closed state, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve (6) on the three-way catalyst (5) through the 1-cylinder heat pipe (31), the 2-cylinder heat pipe (32), the 3-cylinder heat pipe (33) and the 4-cylinder heat pipe (34) to heat the three-way catalyst (5); when the temperature sensor ST2(8) detects that the temperature in the three-way catalyst is more than 500 ℃, the 1-cylinder thermal switch (41), the 2-cylinder thermal switch (42), the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are all in an off state;
c. when the temperature sensor ST2(8) detects that the temperature in the three-way catalyst is between 350 ℃ and 400 ℃, the 1-cylinder thermal switch (41), the 2-cylinder thermal switch (42) and the 3-cylinder thermal switch (43) are closed, the 4-cylinder thermal switch (44) is opened, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve (6) on the three-way catalyst (5) through the 1-cylinder heat pipe (31), the 2-cylinder heat pipe (32) and the 3-cylinder heat pipe (33) to heat the three-way catalyst (5);
d. when the temperature sensor ST2(8) detects that the temperature in the three-way catalyst is between 400 ℃ and 450 ℃, the 1-cylinder thermal switch (41) and the 2-cylinder thermal switch (42) are closed, the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are opened, and the high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve (6) on the three-way catalyst (5) through the 1-cylinder heat pipe (31) and the 2-cylinder heat pipe (32) to heat the three-way catalyst (5);
e. when the temperature sensor ST2(8) detects that the temperature in the three-way catalyst is between 450 ℃ and 500 ℃, the 1-cylinder thermal switch (41) is closed, the 2-cylinder thermal switch (42), the 3-cylinder thermal switch (43) and the 4-cylinder thermal switch (44) are opened, and high-temperature gas exhausted by the engine cylinder body is led to the coating sleeve (6) on the three-way catalyst (5) through the 1-cylinder heat pipe (31) to heat the three-way catalyst (5).
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| CN112983599A (en) * | 2020-12-29 | 2021-06-18 | 翟荣梅 | Precooling mechanism of three-way catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112983599A (en) * | 2020-12-29 | 2021-06-18 | 翟荣梅 | Precooling mechanism of three-way catalyst |
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Effective date of registration: 20211117 Address after: 241000 rooms A206 and 207, complex building, 38 Yinhu North Road, Wuhu District, China (Anhui) pilot Free Trade Zone, Wuhu City, Anhui Province Applicant after: WUHU WANJIANG INTELLECTUAL PROPERTY OPERATION CENTER Co.,Ltd. Address before: 241000 Anhui Wuhu economic and Technological Development Zone, Changchun Road, No. 8 generator transformer joint factory Applicant before: ANHUI RUISAIKE RENEWABLE RESOURCE TECHNOLOGY Co.,Ltd. |
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Application publication date: 20200911 |