CN219840722U - Piston rod mechanism for reciprocating piston type internal combustion engine - Google Patents
Piston rod mechanism for reciprocating piston type internal combustion engine Download PDFInfo
- Publication number
- CN219840722U CN219840722U CN202321021995.0U CN202321021995U CN219840722U CN 219840722 U CN219840722 U CN 219840722U CN 202321021995 U CN202321021995 U CN 202321021995U CN 219840722 U CN219840722 U CN 219840722U
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- China
- Prior art keywords
- piston
- connecting rod
- crankshaft
- combustion engine
- internal combustion
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model discloses a piston connecting rod mechanism for a reciprocating piston type internal combustion engine, which comprises a piston connecting rod, a supporting piston and a crankshaft connecting rod, wherein the upper end of the piston connecting rod is connected with a working piston pin in a cylinder, the middle part of the piston connecting rod is connected with the supporting piston pin, the lower end of the piston connecting rod is connected with a small end pin of the crankshaft connecting rod, the big end of the crankshaft connecting rod is connected with a journal of a crankshaft, and the length of the crankshaft connecting rod is larger than the radius of the crankshaft. Compared with the traditional internal combustion engine, the internal combustion engine has higher working efficiency and saves more oil.
Description
Technical Field
The utility model relates to the technical field of internal combustion engines, in particular to a piston connecting rod mechanism for a reciprocating piston type internal combustion engine.
Background
Most of the fuel supplied by modern reciprocating piston internal combustion engines burns near the top dead center, the cylinder pressure rises sharply and reaches a maximum value rapidly near the top dead center, and although the fuel gas pressure is very high at the moment, the piston just passes over the top dead center, the corresponding arm coefficient of torque formed by the connecting rod and the crankshaft is very small, so that the combustion pressure cannot be effectively converted into the torque of the crankshaft. As the piston descends, the working volume of the cylinder increases, the losses of heat transfer, friction and the like increase, the pressure in the cylinder rapidly decreases, so that the gas working capacity is greatly reduced, and the maximum heat efficiency of the traditional internal combustion engine is difficult to exceed 60 percent due to the fact that most of heat energy which can be used for working work is irreversibly lost due to the fact that the gas pressure is reduced too much while the force arm coefficient is increased along with the descending of the piston.
Disclosure of Invention
The utility model aims to provide a piston connecting rod mechanism for a reciprocating piston type internal combustion engine, which reduces the gas pressure in a cylinder when an output force arm of the internal combustion engine is in a larger range of values compared with the traditional internal combustion engine by shortening the length of a crankshaft connecting rod, thereby achieving the purposes of improving the heat efficiency of the internal combustion engine and saving fuel.
To overcome the above-mentioned disadvantages in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
a piston-connecting rod mechanism for reciprocating piston IC engine is composed of piston connecting rod, supporting piston and crankshaft connecting rod, and features that the upper end of piston connecting rod is connected to the working piston pin in cylinder, the middle part of piston connecting rod is connected to the supporting piston pin, the lower end of piston connecting rod is connected to the small end of crankshaft connecting rod, the big end of crankshaft connecting rod is connected to the axle journal of crankshaft, and the length of crankshaft connecting rod is longer than the radius of crankshaft.
Further, the working piston is connected with the upper end pin hole of the piston connecting rod through a piston pin, the middle pin hole of the supporting piston is connected with the piston connecting rod through a supporting piston pin, and the small end of the crankshaft connecting rod is connected with the lower end pin hole of the piston connecting rod through a connecting rod pin.
The principle of the utility model is as follows:
compared with the traditional internal combustion engine, the length of the crankshaft connecting rod is shortened, and when the internal combustion engine works in a large range of the output force arm and the output force arm of the internal combustion engine are the same, the descending distance of the working piston of the traditional internal combustion engine is larger than that of the working piston of the internal combustion engine after improvement. So that the volume of the cylinder of the internal combustion engine after the improvement is smaller than that of the cylinder of the traditional internal combustion engine, the force acting on the crankshaft in the state after the improvement is larger than that acting on the crankshaft before the improvement, and the gas pressure in the cylinder is further converted into the output torque of the crankshaft of the internal combustion engine.
The utility model has the beneficial effects that: compared with the traditional internal combustion engine, the internal combustion engine has higher working efficiency and saves more oil.
Drawings
FIG. 1 is a schematic diagram of an application structure of a piston-rod mechanism according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a schematic diagram of the working structure of a prior art internal fuel;
fig. 4 is a schematic diagram of the working structure of an internal combustion engine to which the piston-rod mechanism of the present utility model is applied.
The figure shows:
1-a working piston; 2-piston connecting rod; 3-a piston pin; 4-supporting a piston; 5-supporting a piston pin; 6-a crankshaft connecting rod; 7-link pins; 8-journal; 9-crankshaft.
Detailed Description
The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1-2, a specific application example of the piston rod mechanism of the present utility model includes a cylinder, a working piston 1, a piston rod 2, a crankshaft connecting rod 6 and a crankshaft 9, wherein the upper end pin hole of the working piston 1 and the piston connecting rod 2 is connected through a piston pin 3, the middle pin hole of the supporting piston 4 and the piston connecting rod 2 is connected through a supporting piston pin 5, the small end of the crankshaft connecting rod 6 is connected with the lower end pin hole of the piston connecting rod 2 through a connecting rod pin 7, the large end of the crankshaft connecting rod 6 is connected with a journal 8 of the crankshaft 9 of the internal combustion engine, and the shortened length of the crankshaft connecting rod is greater than the radius of the crankshaft (half of the working piston stroke).
The specific test:
as shown in FIG. 4, the experimental principle model machine adopts a domestic 170F single-cylinder air-cooled diesel engine, the cylinder diameter is 70mm, the piston stroke is 75mm, and the length of a crankshaft connecting rod is 132mm. 5 principle prototypes were designed for comparison, and the crankshaft connecting rods of the 5 principle prototypes were shortened to 120mm, 90mm, 75mm, 60mm and 40mm, respectively.
Bench tests were performed on 6 diesel engines, respectively, and test data were recorded. As shown in fig. 3, a detailed description of the operation of the internal combustion engine is given by taking a principle prototype with a crankshaft connecting rod length of 75mm as an example, and the dimensions marked in the drawing are the actual dimensions of the principle prototype and the prototype parts. After the working stroke starts, when the maximum force arm coefficient of 37.5mm is formed between the crankshaft connecting rod and the crankshaft of the principle prototype and the prototype respectively, the piston descending size of the prototype reaches 32.277mm, and the piston descending size of the novel internal combustion engine piston connecting rod mechanism is only 28.647mm because of the shortened crankshaft connecting rod, and the piston descending size is reduced by 3.63mm.
The fuel consumption data for several sets of tests are shown in the following table, in which crankshaft connecting rod lengths are used as parameters for distinguishing the tests:
| test | 132mm | 120mm | 90mm | 75mm | 60mm | 40mm |
| Fuel consumption data (g/kw.h) | 289.7 | 242 | 230 | 229 | 232 | 226 |
Tests prove that the mechanism can be applied to an internal combustion engine to save fuel.
In addition, the junction of all parts in the novel internal-combustion engine piston connecting rod mechanism in 5 sets of comparative experiments can realize low minor face contact structure, accords with the design requirement that the internal-combustion engine driving medium possesses shock resistance and wearability and is good, and the principle model machine is through dismantling the inspection after running through the load of a plurality of hours, and novel internal-combustion engine piston connecting rod mechanism does not appear unusual wearing and tearing.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (2)
1. The piston connecting rod mechanism for the reciprocating piston type internal combustion engine is characterized by comprising a piston connecting rod (2), a supporting piston (4) and a crankshaft connecting rod (6), wherein the upper end of the piston connecting rod (2) is in pin connection with a working piston (1) in a cylinder, the middle part of the piston connecting rod (2) is in pin connection with the supporting piston (4), the lower end of the piston connecting rod (2) is in pin connection with a small end of the crankshaft connecting rod (6), the big end of the crankshaft connecting rod (6) is connected with a journal (8) of a crankshaft (9), and the length of the crankshaft connecting rod (6) is larger than the radius of the crankshaft (9).
2. The piston rod mechanism for a reciprocating piston type internal combustion engine according to claim 1, wherein the working piston (1) is connected to an upper end pin hole of the piston rod (2) through a piston pin (3), the supporting piston (4) is connected to a middle pin hole of the piston rod (2) through a supporting piston pin (5), and a small end of the crankshaft connecting rod (6) is connected to a lower end pin hole of the piston rod (2) through a connecting rod pin (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021995.0U CN219840722U (en) | 2023-04-28 | 2023-04-28 | Piston rod mechanism for reciprocating piston type internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021995.0U CN219840722U (en) | 2023-04-28 | 2023-04-28 | Piston rod mechanism for reciprocating piston type internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219840722U true CN219840722U (en) | 2023-10-17 |
Family
ID=88298379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321021995.0U Active CN219840722U (en) | 2023-04-28 | 2023-04-28 | Piston rod mechanism for reciprocating piston type internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219840722U (en) |
-
2023
- 2023-04-28 CN CN202321021995.0U patent/CN219840722U/en active Active
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