Speed regulation assembly for engine
By designing speed control components for the engine, including a control linkage mechanism and a corrector, the problem of excessive smoke in a single-cylinder Euro IV diesel engine under free acceleration was solved, achieving a balance between fuel quantity control and torque reserve, thus meeting regulatory requirements.
Patent Information
- Application Number
- CN202520126251.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The existing single-cylinder Euro IV diesel engine injection pump is prone to excessive smoke emissions under free acceleration conditions, which are difficult to control and cannot meet regulatory requirements.
Design a speed control component including a control linkage mechanism, an oil pump rack, and a corrector. The corrector limits the maximum extension length of the oil pump rack to control the maximum oil output of the engine and ensure that the smoke content is within the regulatory limits.
Effectively control the amount of fuel in the engine under free acceleration to ensure that the smoke content does not exceed the standard and that the engine has sufficient torque reserve to meet regulatory requirements.
Smart Images
Figure CN223469341U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of engine, especially a speed regulating assembly for engine. BACKGROUND
[0002] With the implementation of the national environmental protection law and the air pollution prevention and control law, new requirements are put forward for the power matching of motor vehicles and non-road mobile machinery. The present GB20891 "non-road mobile machinery diesel engine exhaust pollutant limit value and measurement method" and GB / T "diesel engine steady-state exhaust smoke and measurement method" limit non-road mobile machinery emission pollutants, with the implementation of GB36886 "non-road mobile diesel machinery exhaust smoke limit value and measurement method", the free acceleration smoke of non-road mobile machinery also needs to meet the regulatory requirements, which puts forward new requirements for the manufacturers using mechanical fuel injection pump technology for single-cylinder national four diesel engines. Not only the emission pollutants meet the standard, but also the free acceleration smoke needs to meet the regulatory requirements.
[0003] The current oil quantity corrector matched with the single-cylinder national four diesel engine fuel injection pump is mainly used for starting and overload enrichment correction, but it is easy to exceed the standard in the free acceleration state and is not easy to control.
[0004] Therefore, it is necessary to provide a speed regulating assembly for engine to overcome the defects in the prior art. SUMMARY
[0005] The utility model aims at providing a speed regulating assembly for engine, improving the control of oil quantity in the free acceleration state of engine, and solving the problem of excessive smoke.
[0006] According to one aspect of the utility model, a speed regulating assembly for engine is provided, which is installed on the gear chamber cover of engine and comprises a control connecting rod mechanism, an oil pump rack and a corrector. The control connecting rod mechanism is connected with the oil pump rack to adjust the oil intake of engine. The corrector is arranged in the gear chamber cover and opposite to the oil pump rack. The corrector is used to limit the maximum extension length of the oil pump rack and further limit the maximum oil output of engine.
[0007] The corrector comprises a housing, a correction rod, a correction cap, a correction spring, a top rod and a tight cap. The correction rod comprises a flat joint end arranged in the housing and an extension end extending out of the housing and arranged opposite to the oil pump rack. The operating connecting rod mechanism drives the oil pump rack to extend to the low joint of the extension end to limit the maximum oil intake of the engine. The correction cap is arranged in the housing. The correction cap comprises a first cavity sleeved on the flat joint end and a second cavity in communication with the first cavity and having an inner diameter smaller than that of the first cavity. The flat joint end moves in the axial direction of the correction rod in the first cavity. The correction spring is arranged in the second cavity. The two ends of the correction spring abut against the flat joint end and the end of the second cavity away from the flat joint end. The top rod is arranged in the housing and abuts against the correction cap at one end to fix the correction cap in the housing. The tight cap abuts against the other end of the top rod to press the correction cap in the housing.
[0008] The above scheme can realize that the engine is given a smaller oil amount when the maximum throttle of the engine needs to be increased, and the correction cap is tightly arranged on the correction rod to become a rigid structure when the engine needs additional oil amount. The correction stroke ensures that the engine has necessary torque reserve and limits the continuous increase of oil amount in the free acceleration state, and the smoke degree does not exceed the limit value required by regulations. The above scheme has reliable and practical structure, can ensure that the engine has necessary torque reserve and ensure that the smoke degree is within the range required by regulations, and has very necessary popularization and application value for the use of mechanical fuel injection pump technology scheme route of the fourth national engine.
[0009] Preferably, the inner diameters of the first cavity and the second cavity form a first limiting surface. The above scheme helps to control the maximum movement distance of the correction rod in the axial direction, thereby helping to control the oil amount in the free acceleration state, and effectively preventing the problem that the engine smoke degree is easy to exceed the standard.
[0010] Preferably, the housing comprises an inner cavity and a first opening cavity in communication with the inner cavity and facing the extension end. The inner diameter of the inner cavity is greater than that of the first opening cavity. The first opening cavity and the inner cavity form a second limiting surface. The end surface of the correction cap facing the extension end at least partially contacts the second limiting surface. The diameter of the flat joint end is greater than the inner diameter of the first opening cavity. The above scheme helps to realize the axial movement of the correction rod while avoiding the correction rod from falling out of the housing.
[0011] Preferably, the flat joint end is arranged between the first limiting surface and the second limiting surface. When the surface of the flat joint end away from the extension end contacts the first limiting surface, the fuel injection pump reaches the maximum oil amount.
[0012] Preferably, the movement distance of the flat joint end in the axial direction is Δt, which is the correction stroke.
[0013] Preferably, the correction rod further comprises a transition part connected to the flat joint end and the extension end, and the transition part is arranged in the first opening cavity. The above scheme helps to realize the axial movement of the correction rod.
[0014] Preferably, the shell further comprises a second opening cavity in communication with the inner cavity and facing away from the extension end, and the cap is threadedly connected with the second opening cavity and abuts against the top rod to fix the top rod. The above-mentioned scheme helps to fix the cap to the top rod, thereby ensuring that the top rod can fix the correction cap in the shell.
[0015] Preferably, the end of the correction cap facing the first cavity at least partially contacts the second limiting surface.
[0016] Preferably, the top rod comprises a main body portion and a protrusion extending from the main body portion towards the extension end, and the protrusion abuts in the connecting hole to limit the correction cap in the axial direction. The above-mentioned scheme helps to fix the correction cap and prevent the top rod from deviating, thereby improving the stability of the corrector.
[0017] Preferably, the corrector further comprises a nut sleeved on the shell and used to fasten the corrector to the gear chamber cover. The above-mentioned scheme helps to fix the corrector.
[0018] Preferably, the operating linkage mechanism comprises an operating handle, a speed regulating spring telescopically connected with the operating handle and operated by the operating handle, a push rod connected with the speed regulating spring, an angular lever, a pin shaft penetrating the push rod and the angular lever, and a fly hammer assembly connected with one end of the angular lever, and the other end of the angular lever is connected with the oil injection pump rack to limit the oil output of the engine. The above-mentioned scheme helps to realize the oil injection of the engine.
[0019] Preferably, the oil injection pump rack is connected with the oil injection pump to control the oil injection amount.
[0020] The speed regulating assembly for the engine provided by the present application comprises an operating linkage mechanism, an oil pump rack, and a corrector. The corrector can provide a small amount of oil when the maximum oil of the engine needs to be increased, and limit the continuous increase of the oil amount in the free acceleration state. The structure has high reliability and strong practicability, ensures that the smoke degree is within the range required by the regulations, and effectively prevents the problem that the smoke degree of the engine is easy to exceed the standard and is not easy to control in the free acceleration state. BRIEF DESCRIPTION OF DRAWINGS
[0021] The present application will be further described in detail below in combination with the drawings and specific embodiments:
[0022] Figure 1 Fig. 1 is a schematic view of the engine structure;
[0023] Figure 2 Fig. 2 is a schematic view of the speed regulating assembly;
[0024] Figure 3 Fig. 3 is a sectional view of the corrector;
[0025] Figure 4Schematic view of the correction rod;
[0026] Figure 5 Cross-sectional view of the correction cap;
[0027] Figure 6 Cross-sectional view of the housing;
[0028] Figure 7 For Figure 3 Partial enlarged view of the middle A position;
[0029] Figure 8 Cross-sectional view of the top rod.
[0030] Brief Description of the Drawings:
[0031] 10, machine body; 20, gear chamber cover; 30, operating linkage; 40, oil pump rack; 50, corrector; 60, fuel injection pump; 301, operating handle; 302, speed regulating spring; 303, lever; 304, pin shaft; 305, angular lever; 306, flyweight assembly; 307, connecting shaft; 308, support; 501, housing; 502, tight cap; 503, top rod; 504, tight nut; 505, correction cap; 506, correction spring; 507, correction rod; 5011, second limiting surface; 5031, main body part; 5032, convex part; 5051, first limiting surface; 5071, flat end; 5072, transition part; 5073, extension end; A1, first cavity; A2, second cavity; A3, connecting hole; B1, first open cavity; B2, inner cavity; B3, second open cavity. DETAILED DESCRIPTION
[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0033] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".
[0034] It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.
[0035] In this document, unless otherwise explicitly stated and limited, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings and obtain other embodiments without creative labor.
[0038] Referring to Figures 1 to 8 As shown in the drawings, the present embodiment provides a speed regulating assembly for an engine, the speed regulating assembly is mounted on an engine gear chamber cover 20, comprising a control link mechanism 30, an oil pump rack 40, and a corrector 50, the control link mechanism 30 is connected to the oil pump rack 40 to adjust the oil intake of the engine, the corrector 50 is arranged through the gear chamber cover 20 and is arranged opposite to the oil pump rack 40, the corrector 50 is used to limit the maximum extension length of the oil pump rack 40 and further limit the maximum oil output of the engine.
[0039] Referring to Figure 2As shown, the operating link mechanism 30 comprises an operating handle, a speed regulating spring 302 connected with the operating handle 301 and stretched with the operating handle 301, a push rod 303 connected with the speed regulating spring 302, an angular lever 305, a pin shaft 304 passing through the push rod 303 and the angular lever 305, a fly hammer assembly 306 connected with one end of the angular lever 305, a connecting shaft 307, and a support 308 fixed on the engine body 10, the connecting shaft 307 is fixed on the support 308, the operating handle 301 can rotate around the connecting shaft 307, when the operating handle is pulled, the speed regulating spring 302 is stretched to drive the push rod 303 to rotate synchronously, the push rod 303 is fixedly connected with the pin shaft 304 to drive the pin shaft 304 to rotate, the angular lever 305 is sleeved on the pin shaft 304 and fixedly connected with the pin shaft 304 to rotate synchronously with the pin shaft 304, the other end of the angular lever 305 is connected with the rack 40 of the fuel injection pump 60 to drive the fuel injection pump 60 to move with the angular lever 305, the rack 40 of the fuel injection pump 60 is connected with the fuel injection pump 60 to limit the fuel injection amount of the engine. The rack 40 of the fuel injection pump 60 is arranged opposite to the corrector 50, when the rack 40 of the fuel injection pump 60 contacts with the corrector 50, the corrector 50 starts to work.
[0040] Referring to Figure 3 As shown, the corrector 50 comprises a shell 501, a correction rod 507, a correction cap 505, a correction spring 506, a top rod 503, a tight cap 502, and a tight nut 504. The shell 501 is externally threaded, and the tight nut 504 is sleeved on the shell 501 to fasten the corrector 50 to the gear chamber cover 20, which helps to fix the corrector 50.
[0041] Referring to Figure 4 As shown, the correction rod 507 comprises a flat end 5071 arranged in the shell 501, an extension end 5073 extending out of the shell 501 and arranged opposite to the rack 40 of the fuel injection pump 60, and a transition part 5072 connecting the flat end 5071 and the extension end 5073, the operating link mechanism 30 drives the rack 40 of the fuel injection pump 60 to extend to contact the extension end 5073 to limit the maximum fuel injection amount of the engine.
[0042] Referring to Figures 3 to 5 As shown, the correction cap 505 is arranged in the shell 501, the correction cap 505 comprises a first cavity A1 sleeved on the flat end 5071, a second cavity A2 in communication with the first cavity A1 and having an inner diameter smaller than that of the first cavity A1, and a connecting hole A3 in communication with the second cavity A2 and away from the first cavity A1, the flat end 5071 moves in the axial direction of the correction rod 507 in the first cavity A1, and the difference between the inner diameters of the first cavity A1 and the second cavity A2 forms a first limiting surface 5051.
[0043] The correction spring 506 is arranged in the second cavity A2, and the two ends of the correction spring 506 abut against the flat abutting end 5071 and the end of the second cavity A2 away from the flat abutting end 5071. The top rod 503 is arranged in the shell 501, and one end of the top rod 503 abuts against the correction cap 505 to fix the correction cap 505 in the shell 501.
[0044] As shown in Figure 3 and Figure 6 The shell 501 comprises an inner cavity B2, a first open cavity B1 communicating with the inner cavity B2 and facing the extending end 5073, and a second open cavity B3 communicating with the inner cavity B2 and facing away from the extending end 5073. The inner diameter of the inner cavity B2 is greater than the inner diameter of the first open cavity B1, and the first open cavity B1 and the inner cavity form a second limiting surface 5011. The end surface of the correction cap 505 facing the extending end 5073 at least partially contacts the second limiting surface 5011. The diameter of the flat abutting end 5071 is greater than the inner diameter of the first open cavity B1, and the transition part 5072 is arranged in the first open cavity B1.
[0045] The cap 502 is threadedly connected with the second open cavity B3 and abuts against the top rod 503 to fix the top rod 503. The cap 502 abuts against the other end of the top rod 503 to fix the top rod 503, so that the correction cap 505 is pressed in the shell 501, and the cap 502 is threadedly connected with the second open cavity B3 to fix the top rod 503.
[0046] As shown in Figure 7 The flat abutting end 5071 is arranged between the first limiting surface 5051 and the second limiting surface 5011. Under the elastic force of the spring, the flat abutting end 5071 contacts the second limiting surface 5011, and at this time, the flat abutting end 5071 is farthest away from the first limiting surface 5051. When the oil pump rack 40 contacts the flat abutting end 5071 and continues to push the correction rod 507 to the side of the spring in the axial direction of the flat abutting end 5071, the flat abutting end 5071 can move a certain displacement in the axial direction in the first cavity A1 to reach an equilibrium state, so as to control the oil injection amount of the oil pump. When the surface of the flat abutting end 5071 away from the extending end 5073 contacts the first limiting surface 5051, the oil injection pump 60 reaches the maximum oil amount. The moving distance of the flat abutting end 5071 in the axial direction is Δt, which is the correction stroke. The correction stroke of the corrector 50 aims to give a smaller oil amount when the engine maximum oil amount needs to be increased. When the surface of the flat abutting end 5071 away from the extending end 5073 contacts the first limiting surface 5051, the engine needs additional oil amount. Since the correction cap 505 is rigidly arranged on the correction rod 507 through the top rod 503 and the cap 502, the correction rod 507 is limited and cannot continue to move in the axial direction. This correction stroke ensures that the engine has the necessary torque reserve and limits the continuous increase of the oil amount in the free acceleration state, and the smoke degree does not exceed the limit value specified in the regulations.
[0047] Referring to Figure 8 As shown, the top rod 503 comprises a main body part 5031, and a convex part 5032 extending out from the main body part 5031 towards the extension end 5073, the convex part 5032 abutting in the connecting hole A3 to limit the correction cap 505 in the axial direction. Through the above scheme, it is helpful to realize the fixation of the correction cap 505 to prevent the problems such as the deviation of the top rod 503, and improve the stability of the corrector 50.
[0048] The utility model provides a kind of speed regulating assembly for engine, including operating connecting rod mechanism, oil pump rack and corrector, by corrector, it can be realized when engine maximum throttle must increase oil quantity to give smaller oil quantity, and limit oil quantity to continue to increase in free acceleration state, the structure high reliability, practicality is strong, guarantee its smoke degree in the range of regulation requirement, effectively prevent the problem that engine is easy smoke degree in free acceleration state Exceeds and is not easy to control.
[0049] It is obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present application without departing from the spirit and scope of the present application. Therefore, it is intended that the present application cover modifications and variations of the present application provided they come within the scope of the appended claims and their equivalents.
Claims
1. A timing assembly for an engine, the timing assembly mounted to an engine gear chamber cover, characterized by, The present application relates to a correction device for an oil pump rack of an engine, comprising: a control link mechanism; an oil pump rack connected by the control link mechanism to adjust the oil intake of the engine; a corrector disposed in the gear chamber cover and opposite to the oil pump rack, the corrector is used to limit the maximum extension length of the oil pump rack and the maximum oil intake of the engine; the corrector comprises: a housing; a correction rod comprising a flat end disposed in the housing and an extension end extending out of the housing and opposite to the oil pump rack, the control link mechanism drives the oil pump rack to extend to the low end of the extension end to limit the maximum oil intake of the engine; a correction cap disposed in the housing, the correction cap comprises a first cavity sleeved on the flat end, and a second cavity in communication with the first cavity and having a smaller inner diameter than the first cavity, the flat end moves in the axial direction of the correction rod in the first cavity; a correction spring disposed in the second cavity, the two ends of the correction spring abut against the flat end and the end of the second cavity away from the flat end; a jack disposed in the housing and abutting against one end of the correction cap to fix the correction cap in the housing; a tight cap abutting against the other end of the jack to press the correction cap in the housing.
2. A timing assembly for an engine as claimed in claim 1 wherein: The difference between the inner diameters of the first cavity and the second cavity forms a first limiting surface.
3. A timing assembly for an engine as claimed in claim 2 wherein: The housing comprises an inner cavity and a first opening cavity in communication with the inner cavity and towards the extension end, the inner diameter of the inner cavity is larger than that of the first opening cavity, the first opening cavity and the inner cavity form a second limiting surface, the end surface of the correction cap towards the extension end at least partially contacts the second limiting surface, and the diameter of the flat end is larger than the inner diameter of the first opening cavity.
4. A timing assembly for an engine as claimed in claim 3 wherein: The flat end is disposed between the first limiting surface and the second limiting surface, and the surface of the flat end away from the extension end contacts the first limiting surface when the oil pump reaches the maximum oil amount.
5. A timing assembly for an engine as claimed in claim 4 wherein: The correction rod further comprises a transition part connected to the flat end and the extension end, and the transition part is disposed in the first opening cavity.
6. A timing assembly for an engine as claimed in claim 5 wherein: The housing further comprises a second opening cavity in communication with the inner cavity and away from the extension end, the tight cap is threadedly connected with the second opening cavity and abuts against the jack to fix the jack.
7. A timing assembly for an engine as claimed in claim 6 wherein: The correction cap further comprises a connecting hole in communication with the second cavity and away from the first cavity.
8. A timing assembly for an engine as claimed in claim 7 wherein: The jack comprises a main body and a protrusion extending out of the main body towards the extension end, the protrusion abuts in the connecting hole to limit the correction cap in the axial direction.
9. A timing assembly for an engine as claimed in claim 8 wherein: The corrector further comprises a nut sleeved outside the housing and a tight nut for fastening the corrector to the gear chamber cover.
10. A timing assembly for an engine as claimed in claim 9 wherein: The operating linkage mechanism comprises an operating handle, a speed regulating spring connected with the operating handle and capable of stretching and contracting with the operating handle, a push rod connected with the speed regulating spring, an angular lever, a pin shaft penetrating the push rod and the angular lever, a fly hammer assembly connected with one end of the angular lever, and the other end of the angular lever is connected with the fuel injection pump rack to limit the fuel output of the engine.