CN201896666U - Cylinder cover for liquefied petroleum gas engine of forklift - Google Patents
Cylinder cover for liquefied petroleum gas engine of forklift Download PDFInfo
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- CN201896666U CN201896666U CN2010206390893U CN201020639089U CN201896666U CN 201896666 U CN201896666 U CN 201896666U CN 2010206390893 U CN2010206390893 U CN 2010206390893U CN 201020639089 U CN201020639089 U CN 201020639089U CN 201896666 U CN201896666 U CN 201896666U
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- ladder
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Abstract
The utility model discloses a cylinder cover for a liquefied petroleum gas engine of a 490 BPG series forklift, which is characterized in that the lower plane of the cylinder cover and the axis of a copper bushing form an included angle of 97.5 to 98.5 degrees, wherein the outer diameter of the copper bushing is 24 to 27 millimeters, and the wall thickness of the copper bushing is 2.5 to 3.5 millimeters; a two-layer step column with a large upper part and a small lower part is formed between the inner bottom surface and the outer bottom surface of a cylinder; the large outer diameter of the upper layer of the step column, namely the outer diameter of the cylinder, is 24 to 27 millimeters; the small outer diameter of the lower layer at the step is 19 millimeters; the height of the step is 0.5 millimeters; the total vertical thickness at the inner diameter of the central through hole of the step column is 3.5 millimeters; and the inner diameter of the through hole is matched with the outer diameter of a spark plug to be mounted. The cylinder cover after being modified is matched with a special piston for liquid gas, so that the power and the torque of the liquefied petroleum gas engine can exceed 6%-16% of the leave-factory standard of the original diesel engine. The cylinder cover has the advantages of low re-manufacturing cost, economical efficiency of application and good environmental protection.
Description
Technical field
The utility model belongs to the cylinder head technical field of forklift engine, is specifically related to the cylinder head of the 490BPG series forklift engine of combustion fluid liquefied oil gas.
Background technique
Former 490BPG series fork truck diesel engine cylinder lid with its in be used to install oil sprayer copper sleeve a position relation is arranged, the bottom surface angle that is copper sleeve axis and cylinder head is 100 degree, the purpose of She Zhiing is corresponding with the position of the piston upper combustion chamber of former combustion diesel fuel like this, diesel oil that oil sprayer sprays can fully be spread in that piston combustion is indoor, be beneficial to and air mixing, make it reach abundant burning.The position relation of original copper sleeve and cylinder head bottom surface designs for combustion diesel fuel, but such design is very not suitable for using liquid gas.A kind of fork truck liquified petroleum gas engine that proposes in the application number 201020532047.x patent is with piston and cylinder head, be that the piston and the cylinder head of former 490BPG series diesel fork lift trucks motor are transformed back the use on 490BPG series liquefied petroleum gas engine, its cylinder head replaces the diesel injector that former 490BPG series fork truck diesel engine cylinder covers the oblique installation of biasing with spark plug (20), and be installed on the cylinder head (16) this spark plug (20) and the centre of piston opposite position, but the bottom surface angle that still adopts copper sleeve axis and cylinder head is the angle of 100 degree, the character according to liquefied petroleum gas (LPG) is not optimized, be unfavorable for the diffusion of liquid gas and ignite, be unfavorable for bringing into play the Economy and the power character of liquefied petroleum gas engine.Because oil sprayer is different with the structure of spark plug, the structure that is used to install the copper sleeve of spark plug and oil sprayer should be not identical, and this is not considered in this fork truck liquified petroleum gas engine design with piston and cylinder head.Because the corresponding position of piston of cylinder head has intake valve and exhaust valve, therefore after corresponding position of piston is provided with spark plug on the cylinder head, should consider and the intake valve of cylinder head, exhaust valve between enough distances are arranged, be used to guarantee the mechanical strength of cylinder head; And in the 201020532047.x patent application spark plug is installed on the cylinder head centre with the piston opposite position, do not consider this problem.Therefore, this fork truck liquified petroleum gas engine with piston and cylinder head adapt to the combustion characteristic of liquid gas how better, in the installation of spark plug with guarantee that the aspects such as mechanical strength of cylinder head all also have worth improved place.
The model utility content
The purpose of this utility model is that the cylinder head of existing 490BPG series fork truck liquified petroleum gas engine is improved, and proposes a kind of fork truck liquified petroleum gas engine cylinder head, to overcome the above-mentioned defective of prior art.
The utility model 490BPG series fork truck liquified petroleum gas engine cylinder head, comprise rectangular cylinder head body (1), the inner cavity body of main body (1) is cooling water channel (2), the position that main body (1) goes up facing to the piston combustion bowl central direction is equipped with the columnar copper sleeve (3) that runs through cooling water channel (2), and these are all identical with cylinder head with the 490BPG series fork truck liquified petroleum gas engine described in the number of patent application 201020532047.x; It is characterized in that: the lower plane of this cylinder head becomes the angle (8) of 97.5～98.5 degree with the axis of copper sleeve (3); Described copper sleeve (3) is 24～27 millimeters of external diameters, the cylinder that wall thickness is 2.5～3.5 millimeters, and cylinder bottom inner bottom surface (6) is the plane that there are through hole (9) in central authorities; Form a up big and down small two-layer ladder cylinder (5) between inner bottom surface of cylinder bottom (6) and the outer bottom (7), the big outer diameter in upper strata of this ladder cylinder (5) is 24～27 millimeters of the external diameters of cylinder, the little outer diameter of ladder place lower floor (5) is 19 millimeters, ladder height is 0.5 millimeter, the through hole (9) of ladder cylinder (5) central authorities is complementary with the spark plug external diameter that will install, and the vertical total thickness (4) of this ladder cylinder center through hole (9) inner radius is 3.5 millimeters.
Because it is benchmark that the utility model cylinder head has adopted with its lower plane, become the angle (8) of 97.5～98.5 degree with columnar copper sleeve (3) axis that runs through cooling water channel (2), not only make cylinder head bottom and the through hole (13) of copper sleeve coupling and the distance of inlet valve port and exhaust valve port reach 10 millimeters, thereby cylinder is stamped enough intensity when guaranteeing engine operation, and increased cooling water channel space around the copper sleeve, increase the cooling water capacity that flows through the copper sleeve outside, improved cooling effect.Because it is 24～27 millimeters of external diameters that the utility model cylinder head adopts copper sleeve (3), thick 2.5～3.5 millimeters cylinder, cylinder bottom inner bottom surface (6) is the plane that there are through hole (9) in central authorities, when guaranteeing the copper sleeve mechanical strength, also make the instrument sleeve that spark plug is installed have the bigger space can be free movable, thereby make the operation that spark plug is installed comparatively convenient.Owing to form a up big and down small two-layer ladder cylinder (5) between copper sleeve cylinder inner bottom surface (6) that the utility model cylinder head adopts and the outer bottom (7); the big outer diameter in upper strata of this ladder cylinder (5) is 24～27 millimeters of the external diameters of cylinder; the little outer diameter of ladder place lower floor (5) is 19 millimeters; ladder height is 0.5 millimeter; through hole (9) is complementary with the spark plug external diameter that will install; the vertical total thickness (4) of this ladder cylinder center through hole (9) inner radius is 3.5 millimeters; not only increased the sealing of copper sleeve and cylinder head body; copper sleeve has enough mechanical strengths after having guaranteed spark plug is installed; and can make the spark plug thread bottom end face equal with the cylinder head bottom; guarantee that the length that spark plug stretches in the cylinder reaches the required requirement of installation spark plug; thereby the mixed gas that helps in spark plug and the cylinder fully contacts; guarantee that igniting is reliable; and can prevent that spark plug from being ablated by gas high-temperature, play the effect of protection spark plug.The optimization improvement project of the utility model cylinder head has the motor good advantage of low cost of manufacture, its usage economy and the feature of environmental protection again.
Description of drawings
Fig. 1 is the partial structurtes schematic representation of the utility model 490BPG series fork truck liquified petroleum gas engine with cylinder head and improvement relative section.The through hole on cylinder head right side is an auxiliary hole, seals with water blocking during use.
Fig. 2 is and the partial structurtes schematic representation of the utility model 490BPG series fork truck liquified petroleum gas engine with the matching used cylinder environment division of cylinder head.
Embodiment
Embodiment 1:
Fig. 1 has provided the partial structurtes schematic representation of the utility model 490BPG series fork truck liquified petroleum gas engine with cylinder head and improvement relative section.The cylinder head of present embodiment combustion fluid liquefied oil gas 490BPG series forklift engine, comprise rectangular cylinder head body (1), the inner cavity body of main body (1) is cooling water channel (2), the position that main body (1) goes up facing to the piston combustion bowl central direction is equipped with the columnar copper sleeve (3) that runs through cooling water channel (2), and these are all identical with cylinder head with the 490BPG series fork truck liquified petroleum gas engine described in the number of patent application 201020532047.x.The utility model is the improvements of the series of the 490BPG among application number 201020532047.x fork truck liquified petroleum gas engine with cylinder head: the lower plane of this cylinder head becomes the angle (8) of 97.5～98.5 degree with the axis of copper sleeve (3); Described copper sleeve (3) is 24～27 millimeters of external diameters, thick 2.5～3.5 millimeters cylinder, and cylinder bottom inner bottom surface (6) is the plane that there are through hole (9) in central authorities; Form a up big and down small two-layer ladder cylinder (5) between inner bottom surface (6) and the outer bottom (7), the big outer diameter in upper strata of this ladder cylinder (5) is 24～27 millimeters of the external diameters of cylinder, the little outer diameter of ladder place lower floor (5) is 19 millimeters, ladder height is 0.5 millimeter, through hole (9) is complementary with the spark plug external diameter that will install, and the vertical total thickness (4) of this ladder cylinder center through hole (9) inner radius is 3.5 millimeters.
Fig. 2 is and the partial structurtes schematic representation of the utility model 490BPG series fork truck liquified petroleum gas engine with the matching used cylinder environment division of cylinder head.During use, diesel oil supply system removal with former 490BPG serial diesel engine, liquid gas supply system and electronic control system are installed, the piston of straight mouthful of drum shape firing chamber of liquid gas special use is installed, the utility model cylinder head is installed, after through hole (9) internal tapping of copper sleeve on cylinder head (3) plane central authorities spark plug (12) is installed in this through hole (9).During the work of 490BPG liquified petroleum gas engine, the mixed gas of air and liquid gas enters cylinder through suction tude, spark plug produces spark mixed gas is lighted, and makes external output power of motor and moment of torsion thereby promote cylinder (11) inner carrier (10) motion, and the waste gas of after-flame is discharged through outlet pipe.
Because it is benchmark that the utility model cylinder head has adopted with its lower plane, become the angle (8) of 97.5～98.5 degree with columnar copper sleeve (3) axis that runs through cooling water channel (2), not only make cylinder head bottom and the through hole (13) of copper sleeve coupling and the distance of inlet valve port and exhaust valve port reach 10 millimeters, thereby cylinder is stamped enough intensity when guaranteeing engine operation, and increased cooling water channel space around the copper sleeve, increase the cooling water capacity that flows through the copper sleeve outside, improved cooling effect.Because it is 24～27 millimeters of external diameters that the utility model cylinder head adopts copper sleeve (3), thick 2.5～3.5 millimeters cylinder, cylinder bottom inner bottom surface (6) is the plane that there are through hole (9) in central authorities, when guaranteeing the copper sleeve mechanical strength, also make the instrument sleeve that spark plug is installed have the bigger space can be free movable, thereby make the operation that spark plug is installed comparatively convenient.Owing to form a up big and down small two-layer ladder cylinder (5) between copper sleeve cylinder inner bottom surface (6) that the utility model cylinder head adopts and the outer bottom (7); the big outer diameter in upper strata of this ladder cylinder (5) is 24～27 millimeters of the external diameters of cylinder; the little outer diameter of ladder place lower floor (5) is 19 millimeters; ladder height is 0.5 millimeter; the through hole (9) of ladder cylinder (5) central authorities is complementary with the spark plug external diameter that will install; the vertical total thickness (4) of this ladder cylinder center through hole (9) inner radius is 3.5 millimeters; not only increased the sealing of copper sleeve and cylinder head body; copper sleeve has enough mechanical strengths after having guaranteed spark plug is installed; and can make the spark plug thread bottom end face equal with the cylinder head bottom; guarantee that the length that spark plug stretches in the cylinder reaches the required requirement of installation spark plug; thereby the mixed gas that helps in spark plug and the cylinder fully contacts; guarantee that igniting is reliable; and can prevent that spark plug from being ablated by gas high-temperature, play the effect of protection spark plug.The optimization improvement project of the utility model cylinder head has the motor good advantage of low cost of manufacture, its usage economy and the feature of environmental protection again.
Carry out above-mentioned improved the utility model 490BPG series fork truck liquified petroleum gas engine cylinder head, remedied the deficiency of 490BPG series fork truck liquified petroleum gas engine usefulness cylinder head among the number of patent application 201020532047.x.Our experiments show that, after the utility model cylinder head is installed, fluid,matching gasification special piston, can make the moment of torsion of this liquified petroleum gas engine reach 172 newton. rice, power reach 38.9 kilowatts, and the parameter of dispatching from the factory of former 490BPG serial diesel engine is moment of torsion 148 newton. 36.8 kilowatts of rice, power, moment of torsion and power surpass 6%～16% of former diesel engine.The optimization improvement project of the utility model cylinder head has the motor good advantage of low cost of manufacture, its usage economy and the feature of environmental protection again.
Claims (1)
1. 490BPG series fork truck liquified petroleum gas engine cylinder head, comprise rectangular cylinder head body (1), the inner cavity body of main body (1) is cooling water channel (2), and the position that main body (1) goes up facing to the piston combustion bowl central direction is equipped with the columnar copper sleeve (3) that runs through cooling water channel (2); It is characterized in that: the lower plane of this cylinder head becomes the angle (8) of 97.5～98.5 degree with the axis of copper sleeve (3); Described copper sleeve (3) is 24～27 millimeters of external diameters, the cylinder that wall thickness is 2.5～3.5 millimeters, and cylinder bottom inner bottom surface (6) is the plane that there are through hole (9) in central authorities; Form a up big and down small two-layer ladder cylinder (5) between inner bottom surface of cylinder bottom (6) and the outer bottom (7), the big outer diameter in upper strata of this ladder cylinder (5) is 24～27 millimeters of the external diameters of cylinder, the little outer diameter of ladder place lower floor (5) is 19 millimeters, ladder height is 0.5 millimeter, the through hole (9) of ladder cylinder (5) central authorities is complementary with the spark plug external diameter that will install, and the vertical total thickness (4) of this ladder cylinder center through hole (9) inner radius is 3.5 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206390893U CN201896666U (en) | 2010-12-02 | 2010-12-02 | Cylinder cover for liquefied petroleum gas engine of forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206390893U CN201896666U (en) | 2010-12-02 | 2010-12-02 | Cylinder cover for liquefied petroleum gas engine of forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201896666U true CN201896666U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206390893U Expired - Fee Related CN201896666U (en) | 2010-12-02 | 2010-12-02 | Cylinder cover for liquefied petroleum gas engine of forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201896666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527340A (en) * | 2013-10-21 | 2014-01-22 | 潍柴动力(潍坊)再制造有限公司 | Engine cylinder block and remanufacturing method thereof |
-
2010
- 2010-12-02 CN CN2010206390893U patent/CN201896666U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527340A (en) * | 2013-10-21 | 2014-01-22 | 潍柴动力(潍坊)再制造有限公司 | Engine cylinder block and remanufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20131202 |