CN209875317U - Engine component with coating in cylinder - Google Patents
Engine component with coating in cylinder Download PDFInfo
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- CN209875317U CN209875317U CN201920260715.9U CN201920260715U CN209875317U CN 209875317 U CN209875317 U CN 209875317U CN 201920260715 U CN201920260715 U CN 201920260715U CN 209875317 U CN209875317 U CN 209875317U
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Abstract
The utility model discloses an in-cylinder coating's engine part, characterized by: coating heat-insulating ceramic coatings on the working surface of the cylinder cover, the working surface of the piston and the working surface of the valve; the heat insulation ceramic coating sequentially comprises a base coat layer, a transition layer and a working layer, wherein the base coat layer is coated on the working surface; the material of the heat-insulating ceramic coating is cobalt-based or/and zirconia. The utility model is used for solve traditional adiabatic engine impact resistance poor, machine oil consume height and the low scheduling problem of comprehensive efficiency.
Description
Technical Field
The utility model relates to an engine part of in-cylinder coating, specifically diesel engine part of in-cylinder coating.
Background
Patent document CN101809264A discloses an improved low heat loss high efficiency engine system for a two-stroke adiabatic internal combustion engine comprising an adiabatic member connected to at least one combustion chamber in order to minimize heat loss during operation, the system having at least one inlet port smoothly connected from a pump cylinder to a transfer port for introducing a fresh mixture during an intake phase of a duty cycle, the inlet port being opened and closed during the duty cycle by an inlet valve, characterized in that the inlet valve is opened for a period of less than 180 ° of cycle angle during the duty cycle.
Patent document CN101255818B discloses a pressure storage type conjoined cylinder heat insulation engine including a machine body, a cylinder block, a crankshaft, a crank, a sliding pair, a driving balance system, a cooling device, a condensing and waste heat recycling device. The advantages are that: the characteristic of parallel connection of double cylinders is utilized, the traditional working mode of completing four strokes of a single cylinder is divided into two cylinders to be completed, a pressure storage mechanism and a ceramic heat insulation device are additionally arranged, the devices are arranged on the cylinder and a piston, a piston ring of a combustion cylinder is arranged at the waist of the piston, and the problems of air inlet, piston ring lubrication, cooling and heat insulation of a heat insulation engine are solved. The cooling device adopts the spiral hollow pipe to convey cooling liquid to the cylinder body, the condensing device adopts the refrigerant to refrigerate to cool the cylinder body, and the heat collector is arranged in the inner cavity of the exhaust pipe to cool the engine and utilize waste heat to do work and refrigerate. The advantages simplify the mechanism and improve the heat efficiency of the engine.
Patent document CN102364071B discloses a turbo cylinder low-entropy engine, including intake duct, exhaust duct, explosion exhaust engine, turbo compressor and power turbine, turbo compressor's compressed gas export with the intake duct intercommunication, the intake duct through the (air) intake valve with explosion exhaust engine's combustion chamber intercommunication, the combustion chamber through the exhaust valve with the exhaust duct intercommunication, the exhaust duct with power turbine's gas working medium entry intercommunication, turbo compressor's compressed gas exit's bearing capacity is greater than 1MPa, explosion exhaust engine is not right turbo compressor exports power, power turbine is right turbo compressor exports power. The invention realizes high efficiency and low pollution of the engine and greatly improves the environmental protection of the engine.
In view of the above, adiabatic engine research has been long, and the conventional adiabatic engine improvement technology has poor impact resistance, high oil consumption, low overall efficiency, and the like, so that it is difficult to put the technology into practical use.
Disclosure of Invention
The utility model relates to an in-cylinder coating's engine part for it is poor to solve traditional adiabatic engine impact resistance, and machine oil consume is high and the low scheduling problem of comprehensive efficiency.
An engine component with a coating in a cylinder is characterized in that a heat-insulating ceramic coating is coated on the working surface of a cylinder cover, the working surface of a piston and the working surface of an air valve; the heat insulation ceramic coating sequentially comprises a base coat layer, a transition layer and a working layer, wherein the base coat layer is coated on the working surface; the material of the heat-insulating ceramic coating is cobalt-based or/and zirconia.
The bottom of the cylinder cover is coated with a heat insulation ceramic coating, the top surface of the piston is coated with a heat insulation ceramic coating, and the surface of the air valve is coated with a heat insulation ceramic coating.
Coating a cobalt-based material on the priming coat, wherein the thickness range is 80-100 mu m; coating cobalt-based and zirconium oxide materials on the transition layer, wherein the thickness range is 80-100 mu m; the working layer is coated with zirconia, and the thickness range is 150-200 mu m.
The utility model has the advantages that the cracking risk of the bridge of the nose area of the cylinder cover can be reduced, the high-temperature eccentric wear risk of the valve guide pipe can be reduced, and the heat loss of the cooling system can be reduced; the exhaust temperature is improved, and the post-treatment conversion efficiency is improved; the temperature of the engine oil is reduced, and the oil change mileage is prolonged; the cold start capability is improved; and developing coating practicability research and exploring the potential of aftertreatment heat management of the engine. The temperature at the inlet of the post-processor of the engine can be increased by more than 10 ℃, and the comprehensive thermal efficiency of the engine is increased by 1-2%.
Drawings
FIG. 1 is a schematic diagram of an internal engine configuration.
Description of reference numerals: 1-cylinder cover, 2-valve and 3-piston.
Detailed Description
The following detailed description of the embodiments of the present invention refers to the accompanying drawings. An engine component with a coating in a cylinder is characterized in that a heat-insulating ceramic coating is coated on the working surface of a cylinder cover 1, the working surface of a piston 3 and the working surface of a valve 2; the heat insulation ceramic coating sequentially comprises a base coat layer, a transition layer and a working layer, wherein the base coat layer is coated on the working surface; the material of the heat-insulating ceramic coating is cobalt-based or/and zirconia.
The bottom of the cylinder cover 1 is coated with a heat insulation ceramic coating, the top surface of the piston 3 is coated with a heat insulation ceramic coating, and the surface of the valve 2 is coated with a heat insulation ceramic coating.
Coating a cobalt-based material on the priming coat, wherein the thickness range is 80-100 mu m; coating cobalt-based and zirconium oxide materials on the transition layer, wherein the thickness range is 80-100 mu m; the working layer is coated with zirconia, and the thickness range is 150-200 mu m.
The utility model discloses carried out the technology research to piston and cylinder cap part spraying technology, because the piston combustion chamber shape is comparatively complicated, hardly controlled to the homogeneity of coating thickness. Through repeated process improvement and adjustment, the uniformity of the thickness of the coating on the surface of the piston is controlled, generally within 0.05mm, and the local area is 0.06-0.07 mm, so that the coating requirement is basically met.
The cylinder cover 1 and the valve 2 of the cylinder can be assembled into an assembly and then integrally sprayed, and the heat insulation ceramic coating can limit the heat from being transferred to the cooling water jacket through the nose bridge area, so that the heat load of the nose bridge area of the cylinder cover 1 is reduced, and the cracking risk of the cylinder cover 1 is reduced; meanwhile, heat is reduced to be transferred to the guide pipe of the valve 2 along the valve rod part, and the risk of high-temperature eccentric wear of the guide pipe of the valve 2 is effectively prevented; further, the amount of heat taken away by the coolant is reduced, and in this case, the size and weight of the cooling circulation system can be reduced, and the water pump power and the fan size can be reduced, which is a great advantage of the adiabatic diesel engine.
After the surface of the combustion chamber of the piston 3 is sprayed with the heat insulation ceramic, as the top surface of the piston 3, the bottom fire surface of the cylinder cover 1 and the bottom surface of the air valve 2 are coated with the nano ceramic material, a thermal barrier is formed, so that the heat transfer from high-temperature gas to a cooling water jacket of an engine cylinder cover through the bottom surface of the cylinder cover 1 in the combustion process is reduced; reducing heat transfer through the top surface of the piston to the cooling gallery of the piston 3; reducing heat transfer from the bottom of the valve along the valve stem to the valve guide, etc.; the temperature of the gas leaving the cylinder 1 is increased accordingly.
Considering the influence of the coating on the bottom of the cylinder cover 1 and the coating on the surface of the piston 2 on the compression ratio of the diesel engine, the top surface of the piston 1 and the surface of the combustion chamber need to be integrally ground to 0.7mm before spraying. The ceramic coating can greatly reduce the heat transfer to the inner cooling oil duct, thereby reducing the temperature of the diesel engine oil and prolonging the replacement of the diesel engine oil.
The utility model has the advantages that the cracking risk of the nose bridge area of the cylinder cover 1 can be reduced, the high-temperature eccentric wear risk of the valve 2 conduit can be reduced, and the heat loss of the cooling system can be reduced; the exhaust temperature is improved, and the post-treatment conversion efficiency is improved; the temperature of the engine oil is reduced, and the oil change mileage is prolonged; the cold start capability is improved; and developing coating practicability research and exploring the potential of aftertreatment heat management of the engine. The temperature at the inlet of the post-processor of the engine can be increased by more than 10 ℃, and the comprehensive thermal efficiency of the engine is increased by 1-2%.
Claims (1)
1. An in-cylinder coated engine component, characterized by: coating heat-insulating ceramic coatings on the working surface of the cylinder cover (1), the working surface of the piston (3) and the working surface of the valve (2); the heat insulation ceramic coating sequentially comprises a base coat layer, a transition layer and a working layer, wherein the base coat layer is coated on the working surface; the bottom of the cylinder cover (1) is coated with a heat insulation ceramic coating, the top surface of the piston (3) is coated with a heat insulation ceramic coating, and the surface of the valve (2) is coated with a heat insulation ceramic coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920260715.9U CN209875317U (en) | 2019-02-28 | 2019-02-28 | Engine component with coating in cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920260715.9U CN209875317U (en) | 2019-02-28 | 2019-02-28 | Engine component with coating in cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875317U true CN209875317U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920260715.9U Active CN209875317U (en) | 2019-02-28 | 2019-02-28 | Engine component with coating in cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN209875317U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294261A (en) * | 2021-06-29 | 2021-08-24 | 潍柴动力股份有限公司 | Cylinder cover, coating preparation device and coating preparation method |
| CN115532555A (en) * | 2022-10-20 | 2022-12-30 | 一汽解放汽车有限公司 | Coating method of valve cylinder cover assembly, engine and vehicle |
-
2019
- 2019-02-28 CN CN201920260715.9U patent/CN209875317U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294261A (en) * | 2021-06-29 | 2021-08-24 | 潍柴动力股份有限公司 | Cylinder cover, coating preparation device and coating preparation method |
| CN115532555A (en) * | 2022-10-20 | 2022-12-30 | 一汽解放汽车有限公司 | Coating method of valve cylinder cover assembly, engine and vehicle |
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