CN107100691A - Fluid power VVT gear - Google Patents
Fluid power VVT gear Download PDFInfo
- Publication number
- CN107100691A CN107100691A CN201710533740.5A CN201710533740A CN107100691A CN 107100691 A CN107100691 A CN 107100691A CN 201710533740 A CN201710533740 A CN 201710533740A CN 107100691 A CN107100691 A CN 107100691A
- Authority
- CN
- China
- Prior art keywords
- main
- base
- push rod
- oil
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/34413—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a kind of fluid power VVT gear, belong to timing of engine technical field, including main camshaft and main camshaft gear, the main camshaft is provided with main cam；The main camshaft be hollow-core construction and its inside be coaxially installed with auxiliary cam axle, one end of the auxiliary cam axle is provided with swing arm, eccentrically mounted on the auxiliary cam axle to have auxiliary cam, the auxiliary cam passes the main camshaft periphery and set close to one end of the main cam；The main gear shaft gear is provided with base, the base is provided with machine oil oil inlet, push rod is slidably fitted with the base, one end of the push rod is stretched out the base and is resisted against in the swing arm, is additionally provided with the base for making the elastic recoil element of the push rod return.This invention ensures that combination property of the engine in high rotating speed, improves engine economy, dynamic property and discharge performance, there is positive role in terms of engine energy-saving emission reduction.
Description
Technical field
The invention belongs to timing of engine technical field, more particularly to a kind of fluid power VVT gear.
Background technology
The start-up time of conventional engine valve is controlled by single camshaft, it is impossible to change gas with the raising of rotating speed and load
Door start-up time, therefore economy is deteriorated, discharge performance is deteriorated, dynamic property is the shortcomings of be deteriorated when exposing high rotating speed high load capacity.
The content of the invention
The technical problems to be solved by the invention are：A kind of fluid power VVT gear is provided, to solve traditional hair
Valve opening time is immutable when motivation rotating speed is improved, and causes rotating speed raising rear engine in engine operation process to enter unsaturated vapor
Technical problem.
In order to solve the above technical problems, the technical scheme is that：Fluid power VVT gear, including main cam
Axle and the main camshaft gear located at described main camshaft one end, the main camshaft are provided with main cam；The main camshaft
To be coaxially installed with auxiliary cam axle inside hollow-core construction and its, one end of the auxiliary cam axle is provided with swing arm, the swing arm and institute
Main camshaft gear is stated positioned at same one end, eccentrically mounted on the auxiliary cam axle to have auxiliary cam, the auxiliary cam passes the master
Camshaft periphery and one end setting of the close main cam；The main gear shaft gear is provided with base, the base and set
Push rod is slidably fitted with organic oil oil inlet, the base, one end of the push rod is stretched out the base and is resisted against described
In swing arm, it is additionally provided with the base for making the elastic recoil element of the push rod return.
As an improvement, the fluid power VVT gear also includes：
Fixed seat, the fixed seat is provided with main oil gallery；
Transfer panel, the transfer panel is fixedly installed on the main camshaft gear, and institute is communicated with the transfer panel
State the first oil duct of machine oil oil inlet；
Piston, the piston is located between the fixed seat and the transfer panel, and the piston is provided with the second oil duct, institute
State the second oil duct and be respectively communicated with the main oil gallery and first oil duct, it is close for end face between the piston and the transfer panel
Envelope.
As an improvement, the swing arm is provided with the chute being engaged with the external part of the push rod.
As an improvement, the positioning sleeve for limiting the push rod position, the positioning sleeve are additionally provided with the base
On be communicated with the 3rd oil duct of the machine oil oil inlet.
As an improvement, the elastic recoil element is the return spring being sleeved on the push rod, the return bullet
One end of spring is resisted against on the base, and the other end is resisted against on the push rod.
Employ after above-mentioned technical proposal, the beneficial effects of the invention are as follows：
Due to being coaxially installed with auxiliary cam axle, the auxiliary cam axle inside the main camshaft of fluid power VVT gear
One end be provided with swing arm, it is eccentrically mounted on the auxiliary cam axle to have auxiliary cam；The main gear shaft gear is provided with base, described
Base, which is provided with machine oil oil inlet, the base, is slidably fitted with push rod, and one end of the push rod is stretched out the base and supported
Lean against in the swing arm, elastic recoil element is additionally provided with the base, thus when engine oil pressure is improved with engine speed,
Machine oil enters base by machine oil oil inlet, and push rod will be protruding in the presence of engine oil pressure, promotes swing arm rotation, makes pair
Camshaft produces a relative angle with respect to main camshaft, secondary convex after auxiliary cam is rotated relative to main cam completes required angle
Wheel shaft and main camshaft keep angular speed synchronous, cause valve opening time to shift to an earlier date with this, now, valve opening time simultaneously by
Main cam and auxiliary cam control, so as to change valve timing；When engine load, which declines rotating speed, to be declined, engine oil pressure reduction,
In the presence of elastic recoil element, pusher retracted, swing arm is rotated backward, so that auxiliary cam returns to home position, so as to disappear
Except main cam and the relative angular difference of auxiliary cam, now valve opening time is by main camshaft control.
The fluid power VVT gear that the present invention is provided, by engine motor oil control, it is not necessary to add extra electricity
Mechanism is controlled, simple in construction, without the need for insulation processing is done to electric control part, reliability is improved；It ensure that engine turns in height
Combination property when fast, improves engine economy, dynamic property and discharge performance, has in terms of engine energy-saving emission reduction actively
Effect.
Because the fluid power VVT gear is also including in fixed seat, transfer panel and piston, thus main oil gallery
Machine oil, can be through the second oil duct and the first oil duct, into machine oil oil inlet；Due to being end face between the piston and the transfer panel
Sealing, prevents oil leakage.
Because the swing arm is provided with chute, motion of the chute to push rod external part plays effect of contraction, so that swing arm is transported
It is dynamic accurate.
Because the positioning sleeve is provided with the 3rd oil duct, thus the machine oil entered from machine oil oil inlet in base can be through the 3rd
Oil duct is applied on push rod.
Because the elastic recoil element is the return spring that is sleeved on the push rod so that elastic recoil component structure
Simply.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention (wherein fixed seat, piston and transfer panel are unassembled)；
Fig. 2 is Fig. 1 partial sectional view；
Fig. 3 is the sectional view of base in Fig. 1, positioning sleeve, push rod and return spring；
Fig. 4 is Fig. 3 explosive view；
Fig. 5 is the partial sectional view at another visual angle of the embodiment of the present invention；
Fig. 6 is the close-up schematic view of main cam and auxiliary cam in Fig. 1；
In figure：1- main camshafts, 2- main camshaft gears, 3- main cams, 4- auxiliary cam axles, 5- swing arms, 51- chutes, 6-
Auxiliary cam, 7- bases, 71- machine oil oil inlets, 8- push rods, 9- fixed seats, 91- main oil gallerys, 10- transfer panels, the oil ducts of 101- first,
11- pistons, the oil ducts of 111- second, 12- positioning sleeves, the oil ducts of 121- the 3rd, 13- return springs；
Overstriking filled arrows represent the flow direction of machine oil in Fig. 2.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As Fig. 1 to Fig. 6 jointly shown in, a kind of fluid power VVT gear, including main camshaft 1 and located at main cam
The main camshaft gear 2 of the one end of axle 1, main camshaft 1 is provided with main cam 3；Main camshaft 1 is hollow-core construction and it is internal coaxial
Auxiliary cam axle 4 is installed, one end of auxiliary cam axle 4 is provided with swing arm 5, and swing arm 5 is located at same one end with main camshaft gear 2, secondary convex
Eccentrically mounted on wheel shaft 4 to have auxiliary cam 6, auxiliary cam 6 passes the periphery of main camshaft 1 and set close to one end of main cam 3.
Main gear shaft gear 2 is provided with base 7, and base 7 is provided with to be slidably fitted with machine oil oil inlet 71, base 7 and pushed away
Bar 8, one end of push rod 8 is stretched out base 7 and is resisted against in swing arm 5, is additionally provided with base 7 for returning the elasticity of the return of push rod 8
Bit unit.
It is preferred that, fluid power VVT gear also includes：
Fixed seat 9, fixed seat 9 is provided with main oil gallery 91；
Transfer panel 10, transfer panel 10 is fixedly installed on main camshaft gear 2, and machine oil oil-feed is communicated with transfer panel 10
First oil duct 101 of mouth 71；
Piston 11, piston 11 is located between fixed seat 9 and transfer panel 10, and piston 11 is provided with the second oil duct 111, the second oil
Road 111 is respectively communicated with the oil duct 101 of main oil gallery 91 and first, is end face seal between piston 11 and transfer panel 10, can effectively prevent
Only oil leakage.
It should be noted that above-mentioned fixed seat 9 is the main oil gallery parts of engine；Above-mentioned fixed seat 9 and piston 11 it
Between and transfer panel 10 and base 7 between be equipped with potted component；In addition, piston 11 and transfer panel 10 can also use this area
The other manner that technical staff can realize is substituted, and is entered as long as can realize the machine oil in main oil gallery 91 importeding into machine oil
Hydraulic fluid port 71, will not be repeated here.
In order that swing arm 5 is moved accurately, swing arm 5 is provided with the chute 51 being engaged with the external part of push rod 8,51 pairs of chute
The motion of the external part of push rod 8 plays effect of contraction.
In the present embodiment, the positioning sleeve 12 for limiting the position of push rod 8 is additionally provided with base 7, positioning sleeve 12 is provided with
Connect the 3rd oil duct 121 of machine oil oil inlet 71.
In order that elastic recoil component structure is simple, elastic recoil element is the return spring 13 being sleeved on push rod 8, is returned
One end of position spring 13 is resisted against on base 7, and the other end is resisted against on push rod 8.Certainly, alternatively, elasticity is returned
Bit unit can also be well known to those skilled in the art, will not be repeated here using multiple disk springs etc..
Its operation principle is as follows:
Machine oil in main oil gallery 91 can be through the second oil duct 111 and the first oil duct 101, into machine oil oil inlet 71, from machine oil
The machine oil that oil inlet 71 enters in base 7 can be applied on push rod 8 through the 3rd oil duct 121, when engine oil pressure is with engine speed
During raising, push rod 8 will be protruding in the presence of engine oil pressure, promotes swing arm 5 to rotate, and makes auxiliary cam axle 4 with respect to main cam
Axle 1 produces a relative angle, after auxiliary cam 6 is rotated relative to main cam 3 completes required angle, as shown in fig. 6, auxiliary cam axle
4 and main camshaft 1 keep angular speed synchronous, cause valve opening time to shift to an earlier date with this, now, valve opening time is simultaneously by leading
Cam 3 and auxiliary cam 6 are controlled, so as to change valve timing；When engine load, which declines rotating speed, to be declined, engine oil pressure reduction,
In the presence of return spring 13, push rod 8 is retracted, and swing arm 5 is rotated backward, so that auxiliary cam 6 returns to home position, so as to disappear
Except main cam 3 and the relative angular difference of auxiliary cam 6, now valve opening time is controlled by main camshaft 1, as shown in Figure 1.
Fluid power VVT gear provided in an embodiment of the present invention, by engine motor oil control, it is not necessary to add volume
Outer electrical control mechanism, simple in construction, without the need for insulation processing is done to electric control part, reliability is improved；It ensure that engine
Combination property in high rotating speed, improves engine economy, dynamic property and discharge performance, in terms of engine energy-saving emission reduction
There is positive role.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. fluid power VVT gear, including main camshaft and the main camshaft gear located at described main camshaft one end,
The main camshaft is provided with main cam；Characterized in that, the main camshaft be hollow-core construction and its inside be coaxially installed with
Auxiliary cam axle, one end of the auxiliary cam axle is provided with swing arm, and the swing arm is located at same one end with the main camshaft gear, described
Eccentrically mounted on auxiliary cam axle to have auxiliary cam, the auxiliary cam passes the main camshaft periphery and close to the one of the main cam
End is set；
The main gear shaft gear is provided with base, and the base is provided with machine oil oil inlet, the base and is slidably fitted with
Push rod, one end of the push rod is stretched out the base and is resisted against in the swing arm, is additionally provided with the base described for making
The elastic recoil element of push rod return.
2. fluid power VVT gear according to claim 1, it is characterised in that the fluid power VVT
Mechanism also includes：
Fixed seat, the fixed seat is provided with main oil gallery；
Transfer panel, the transfer panel is fixedly installed on the main camshaft gear, and the machine is communicated with the transfer panel
First oil duct of oily oil inlet；
Piston, the piston is located between the fixed seat and the transfer panel, and the piston is provided with the second oil duct, described the
Two oil ducts are respectively communicated with the main oil gallery and first oil duct, are end face seal between the piston and the transfer panel.
3. fluid power VVT gear according to claim 1, it is characterised in that the swing arm be provided with it is described
The chute that the external part of push rod is engaged.
4. fluid power VVT gear according to claim 1, it is characterised in that being additionally provided with the base is used for
Limit the 3rd oil duct that the machine oil oil inlet is communicated with the positioning sleeve of the push rod position, the positioning sleeve.
5. fluid power VVT gear according to claim 1, it is characterised in that the elastic recoil element is set
Return spring on the push rod, one end of the return spring is resisted against on the base, and the other end is resisted against described
On push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533740.5A CN107100691B (en) | 2017-07-03 | 2017-07-03 | Hydraulic variable valve timing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533740.5A CN107100691B (en) | 2017-07-03 | 2017-07-03 | Hydraulic variable valve timing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107100691A true CN107100691A (en) | 2017-08-29 |
| CN107100691B CN107100691B (en) | 2023-03-24 |
Family
ID=59664520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710533740.5A Active CN107100691B (en) | 2017-07-03 | 2017-07-03 | Hydraulic variable valve timing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107100691B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0714105U (en) * | 1993-08-06 | 1995-03-10 | 日産ディーゼル工業株式会社 | Valve drive for internal combustion engine |
| CN103775155A (en) * | 2012-10-25 | 2014-05-07 | 重庆长安汽车股份有限公司 | Control oil line of variable valve timing system |
| US20140158074A1 (en) * | 2011-03-30 | 2014-06-12 | Mark Wigsten | Concentric camshaft phaser torsional drive mechanism |
| CN204663604U (en) * | 2015-04-10 | 2015-09-23 | 上汽通用五菱汽车股份有限公司 | A kind of engine variable-valve timing controlling mechanism |
| CN105781652A (en) * | 2014-12-24 | 2016-07-20 | 上海汽车集团股份有限公司 | Variable valve timing system with continuously variable valve opening persistent period and control method of variable valve timing system |
| CN206942827U (en) * | 2017-07-03 | 2018-01-30 | 潍柴西港新能源动力有限公司 | Fluid power VVT gear |
-
2017
- 2017-07-03 CN CN201710533740.5A patent/CN107100691B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0714105U (en) * | 1993-08-06 | 1995-03-10 | 日産ディーゼル工業株式会社 | Valve drive for internal combustion engine |
| US20140158074A1 (en) * | 2011-03-30 | 2014-06-12 | Mark Wigsten | Concentric camshaft phaser torsional drive mechanism |
| CN103775155A (en) * | 2012-10-25 | 2014-05-07 | 重庆长安汽车股份有限公司 | Control oil line of variable valve timing system |
| CN105781652A (en) * | 2014-12-24 | 2016-07-20 | 上海汽车集团股份有限公司 | Variable valve timing system with continuously variable valve opening persistent period and control method of variable valve timing system |
| CN204663604U (en) * | 2015-04-10 | 2015-09-23 | 上汽通用五菱汽车股份有限公司 | A kind of engine variable-valve timing controlling mechanism |
| CN206942827U (en) * | 2017-07-03 | 2018-01-30 | 潍柴西港新能源动力有限公司 | Fluid power VVT gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107100691B (en) | 2023-03-24 |
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