CN109958494A - A kind of compact high efficient multi-mode valve actuating mechanism - Google Patents
A kind of compact high efficient multi-mode valve actuating mechanism Download PDFInfo
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- CN109958494A CN109958494A CN201910236814.8A CN201910236814A CN109958494A CN 109958494 A CN109958494 A CN 109958494A CN 201910236814 A CN201910236814 A CN 201910236814A CN 109958494 A CN109958494 A CN 109958494A
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- China
- Prior art keywords
- cam
- exhaust
- air inlet
- axle sleeve
- driving member
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- 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.)
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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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- 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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
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- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/028—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation for two-stroke engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
A kind of compact high efficient multi-mode valve actuating mechanism, belongs to engine braking field.The mechanism includes import/exhaust door component, import/exhaust camshaft, import/exhaust axle sleeve, switching mechanism etc..Air inlet axle sleeve at least at least has a raised air inlet brake cam with raised air inlet driving cam, an a pair in induction stroke at least provided with a pair near each lower dead center.Exhaust axle sleeve in exhaust stroke at least there is a raised exhaust gas drive cam, a pair at least to have a raised exhaust brake cam in each near top dead center and exhaust bottom dead center at least provided with a pair.Air inlet axle sleeve and/or the exhaust also settable zero lift cam of axle sleeve.Mechanism realizes efficient two-stroke braking mode, improves engine brake power, and more common two-stroke braking improves 56% or so under high speed；103% or so are improved compared with pressure m；Braking of relatively losing heart improves 221% or so, effectively improves the safety and transport capacity of vehicle；Axial dimension maximum shortens 15% or so.
Description
Technical field
The present invention relates to a kind of compact high efficient multi-mode valve actuating mechanisms, belong to engine braking field.
Background technique
The long slope of China's road, abrupt slope are numerous, and truckload is higher than foreign standard, and overloading wagon hypervelocity problem is tight
Weight, these result in China's lorry responsibility road traffic accident and take place frequently, and especially big danger type traffic accident is mainly caused by truck.
The transmission systems retarder such as primary brake system and electromagnetic type, electric vortex type, which works long hours, to be easy because of braking work caused by overheating
The above problem is not present in the problems such as rate quickly reduces, engine braking.The braking power of two-stroke auxiliary braking technology is more existing
Four stroke braking technologies are high, are following development trends.Currently, two-stroke braking mostly uses hydraulic system greatly to realize, ring
It answers speed, each cylinder valve actuating mechanism to switch the problems such as synchronous, braking valve lifting curve is influenced by hydraulic characteristic and also limits hair
The promotion of motivation performance.The present inventor is in the patent (a kind of change mode valve mechanism, 201711219753.1) of application in 2017
Although two-stroke braking mode can be realized, for relatively large freight car braking demand, braking power is still to be improved.Cause
This, develops a set of safe and reliable, switching quickly and can realize the compact that can increase substantially braking power of exchange-column shift
Efficient multi-mode valve actuating mechanism is imperative.
Summary of the invention
It is an object of the invention to: by designing a kind of compact high efficient multi-mode valve actuating mechanism, for realizing :(a) it is
The traffic safety for improving vehicle needs compact high efficient multi-mode valve actuating mechanism to realize drive mode and two-stroke braking mode
It is reliable holding and flexibly switching.(b) compact high efficient multi-mode valve actuating mechanism is needed to realize the valve stroke for each cylinder/respectively recycle
Curve has good consistency, and does not change with the change of the factors such as temperature, engine speed.(c) compact is needed
Efficient multi-mode valve actuating mechanism is safe and reliable, switching is quick and can realize the functions such as exchange-column shift.(d) in order to adapt to the small cylinder heart
Arrangement demand away from engine needs compact high efficient multi-mode air distribution structure compact.
The technical scheme adopted by the invention is that: a kind of compact high efficient multi-mode valve actuating mechanism, it includes inlet valve group
Part, exhaust valve assemblies, inlet camshaft, inlet valve axle sleeve, air inlet driving member, exhaust camshaft, exhaust valve axle sleeve, exhaust
Driving member and switching mechanism.
Inlet camshaft drives the rotation of inlet valve axle sleeve by spline, and exhaust camshaft drives exhaust valve by spline
Axle sleeve rotation.
Intake valve shaft is put at least provided with the first air inlet driving cam, the first air inlet brake cam, the second air inlet driving
Cam, the second switching slot of the second air inlet brake cam, the first switching slot of air inlet and air inlet.
Exhaust valve shaft is put at least provided with first exhaust driving cam, first exhaust brake cam, second exhaust driving
Cam, the second switching slot of second exhaust brake cam, the first switching slot of exhaust and exhaust.
Switching mechanism includes the first switching mechanism of air inlet, the second switching mechanism of air inlet, the first switching mechanism of exhaust and exhaust
Second switching mechanism.
First air inlet drive cam and the second air inlet driving cam in induction stroke at least have a protrusion, first into
Gas brake cam and the second air inlet brake cam at least have a protrusion near each lower dead center, and first exhaust drives cam
At least there is a protrusion, first exhaust brake cam and second exhaust braking in exhaust stroke with second exhaust driving cam
Cam at least has a protrusion near each near top dead center and exhaust bottom dead center.
Air inlet drives cam or air inlet brake cam to drive intake valve assembly by air inlet driving member.Exhaust gas drive cam or
Exhaust brake cam drives exhaust valve assemblies by exhaust-driven part.
The phase of inlet camshaft and/or exhaust camshaft is adjusted using camshaft phase regulating mechanism.
The mechanism has driving cam and brake cam.Air inlet drives the axial position of cam and air inlet brake cam any
It is convex to be named as respectively left side according to position for arrangement, the axial position arbitrary arrangement of exhaust gas drive cam and exhaust brake cam
Wheel and right cam.
When the cam of driving member being driven to be left cam, the work of the first switching mechanism drives the cam of driving member by left side
Cam switches to right cam.
When the cam of driving member being driven to be right cam, the work of the second switching mechanism drives the cam of driving member by right side
Cam switches to left cam.
Integral structure can be used in first switching slot and the second switching slot, and split structure also can be used.
The position of switching mechanism and the phase of switching slot can be adjusted according to the actual situation.
Air inlet driving member and exhaust-driven part are referred to as driving member, driving member can be used traditional rocker arm, very cup-rocker arm or
The very valve actuating mechanisms driving member such as cup-push rod-rocker arm, also settable air valve bridge, can also be used hydraulic between rocker arm and valve assembly
Principal and subordinate's piston type transmission mechanism, mechanical type lever or more bar transmission mechanisms etc..
Air inlet drives the axial position arbitrary arrangement of cam and air inlet brake cam, and exhaust gas drive cam and exhaust brake are convex
The axial position arbitrary arrangement of wheel is named as respectively left cam and right cam according to position.
When the cam of driving member being driven to be left cam, the work of the first switching mechanism drives the cam of driving member by left side
Cam switches to right cam.
When the cam of driving member being driven to be right cam, the work of the second switching mechanism drives the cam of driving member by right side
Cam switches to left cam.
The beneficial effects of the present invention are: this compact high efficient multi-mode valve actuating mechanism includes that valve assembly, import/exhaust are convex
Wheel shaft, import/exhaust axle sleeve, switching mechanism etc..(a) the reliable holding and flexibly of drive mode and two-stroke braking mode is realized
Engine brake power has been significantly increased in switching, and it is left that the more common two-stroke braking mode of the lower braking power of high speed improves 56%
The right side, improves 103% or so compared with pressure m, and braking of relatively losing heart improves 221% or so, greatly improves vehicle driving safety.(b)
Implementation pattern switches by the way of mobile axle sleeve, realizes switching quickly and can realize the functions such as exchange-column shift, and is real
Now the valve lift curve for each cylinder/respectively recycle has good consistency, and not changing with factors such as temperature, engine speed
Become and changes.(c) structure size of mechanism is significantly reduced, and particularly axially size maximum can shorten 15% or so,
It can be used for the arrangement of existing small cylinder centre line spacing engine.
Detailed description of the invention
The present invention is further described with embodiment with reference to the accompanying drawing.
Fig. 1 is compact high efficient multi-mode valve actuating mechanism first embodiment schematic diagram.
Fig. 2 is first kind air inlet axle sleeve expanded schematic diagram.
Fig. 3 is first kind exhaust axle sleeve expanded schematic diagram.
Fig. 4 is the second class air inlet axle sleeve expanded schematic diagram.
Fig. 5 is the second class exhaust axle sleeve expanded schematic diagram.
Fig. 6 is compact high efficient multi-mode valve actuating mechanism braking effect figure.
In figure: 101, exhaust camshaft；102, exhaust valve axle sleeve；103A, first exhaust driving member；103B, second row
Gas driving member；104A, first exhaust door component；104B, second exhaust door component；114A, first exhaust drive cam；112A,
First exhaust brake cam；114B, second exhaust drive cam；112B, second exhaust brake cam；121, the first switching of exhaust
Mechanism；122, it is vented the second switching mechanism；131, it is vented the first switching slot；132, it is vented the second switching slot；201, inlet valve is convex
Wheel shaft；202, inlet valve axle sleeve；203A, the first air inlet driving member；203B, the second air inlet driving member；204A, the first inlet valve group
Part；204B, the second intake valve assembly；214A, the first air inlet drive cam；212A, the first air inlet brake cam；214B, second
Air inlet drives cam；212B, the second air inlet brake cam；221, the first switching mechanism of air inlet；222, the second switching mechanism of air inlet；
231, the first switching slot of air inlet；232, the second switching slot of air inlet.
Specific embodiment
The present invention relates to a kind of compact high efficient multi-mode valve actuating mechanism, it include intake valve assembly, exhaust valve assemblies, into
Valve camshaft 201, inlet valve axle sleeve 202, air inlet driving member, exhaust camshaft 101, exhaust valve axle sleeve 102, exhaust-driven
Part and switching mechanism.Inlet camshaft 201 drives inlet valve axle sleeve 202 to rotate by spline, and exhaust camshaft 101 is logical
Crossing spline drives exhaust valve axle sleeve 102 to rotate.
With reference to the accompanying drawing, structure is further described.
Embodiment
Fig. 1 is compact high efficient multi-mode valve actuating mechanism embodiment schematic diagram.Fig. 2 and Fig. 3 is air inlet axle sleeve and row respectively
The expanded schematic diagram of gas axle sleeve.
Be provided on inlet valve axle sleeve 202 first air inlet driving cam 214A, the first air inlet brake cam 212A, second into
Gas drive moving cam 214B, the second air inlet brake cam 212B, the first switching slot of air inlet 231 and the second switching slot of air inlet 232.Exhaust
First exhaust driving cam 114A, first exhaust brake cam 112A, second exhaust driving cam are provided on door-hinge set 102
114B, the second switching slot 132 of second exhaust brake cam 112B, the first switching slot 131 of exhaust and exhaust.Switching mechanism include into
The first switching mechanism of gas 221, the second switching mechanism of the second switching mechanism of air inlet 222, the first switching mechanism 121 of exhaust and exhaust
122。
First air inlet drives cam 214A and the second air inlet driving cam 214B to have a protrusion in induction stroke, the
One air inlet brake cam 212A and the second air inlet brake cam 212B has protrusion, first exhaust driving near each lower dead center
Cam 114A and second exhaust driving cam 114B have protrusion, first exhaust brake cam 112A and second in exhaust stroke
Exhaust brake cam 112B has protrusion near each near top dead center and exhaust bottom dead center.Driving member uses shaking with roller
Arm.First air inlet drive cam 214A or the first air inlet brake cam 212A by the first air inlet driving member 203A driving first into
Valve assembly 204A；Second air inlet drives cam 214B or the second air inlet brake cam 212B to pass through the second air inlet driving member 203B
Drive the second intake valve assembly 204B；First exhaust driving cam 114A or first exhaust brake cam 112A passes through first exhaust
Driving member 103A drives first exhaust door component 104A；Second exhaust drives cam 114B or second exhaust brake cam 112B logical
Cross second exhaust driving member 103B driving second exhaust door component 104B.
The position of switching mechanism can also be adjusted according to the actual situation.Figure 4 and figure 5 respectively show the second class Intake shafts
The expanded schematic diagram of set and exhaust axle sleeve.
Its working method is:
The cam of driving air inlet driving member is air inlet driving cam, and when the first switching mechanism of air inlet 221 works, air inlet first switches
Mechanism 221 is matched with the first switching slot of air inlet 231, will drive air inlet driving member cam by air inlet driving cam switch into
Gas brake cam.
The cam of driving air inlet driving member is air inlet brake cam, when the second switching mechanism of air inlet 222 works, air inlet second
Switching mechanism 222 is matched with the second switching slot of air inlet 232, and the cam of air inlet driving member 203 will be driven by air inlet brake cam
Switch to air inlet driving cam.
The cam for driving exhaust-driven part is exhaust gas drive cam, when the first switching mechanism 121 of exhaust works, exhaust first
Switching mechanism 121 is matched with the first switching slot 131 of exhaust, and the cam of exhaust-driven part 103 will be driven by exhaust gas drive cam
Switch to exhaust brake cam.
The cam for driving exhaust-driven part is exhaust brake cam, when the second switching mechanism 122 of exhaust works, exhaust second
Switching mechanism 122 is matched with the second switching slot 132 of exhaust, and the cam of exhaust-driven part 103 will be driven by exhaust brake cam
Switch to exhaust gas drive cam.
Fig. 6 is compact high efficient multi-mode valve actuating mechanism braking effect figure.(exhaust brake cam is arranged for mechanism and former scheme
Gas lower dead center does not have protrusion nearby) it is two-stroke braking mode, mechanism realizes engine brake power and obtains substantially
The raising of degree, the lower braking power of high speed improve 56% or so；103% or so are improved compared with pressure m；Braking of relatively losing heart improves
221% or so.This is extremely advantageous to the raising of vehicle driving safety and transport capacity.
Claims (4)
1. a kind of compact high efficient multi-mode valve actuating mechanism, it includes intake valve assembly, exhaust valve assemblies, it is characterized in that: it is also
Including inlet camshaft (201), inlet valve axle sleeve (202), air inlet driving member, exhaust camshaft (101), exhaust valve axle sleeve
(102), exhaust-driven part and switching mechanism；
The inlet camshaft (201) drives inlet valve axle sleeve (202) rotation by spline, and exhaust camshaft (101) is logical
It crosses spline and drives exhaust valve axle sleeve (102) rotation；
Cam (214A), the first air inlet brake cam are driven at least provided with the first air inlet on the inlet valve axle sleeve (202)
(212A), the second air inlet drive cam (214B), the second air inlet brake cam (212B), the first switching slot of air inlet (231) and into
The second switching slot of gas (232)；
Cam (114A), first exhaust brake cam are driven at least provided with first exhaust on the exhaust valve axle sleeve (102)
(112A), second exhaust drive cam (114B), second exhaust brake cam (112B), exhaust the first switching slot (131) and arrange
The second switching slot of gas (132)；
The switching mechanism includes the first switching mechanism of air inlet (221), the second switching mechanism of air inlet (222), the first switching of exhaust
Mechanism (121) and exhaust the second switching mechanism (122)；
First air inlet driving cam (214A) and the second air inlet driving cam (214B) at least have one in induction stroke
A protrusion, the first air inlet brake cam (212A) and the second air inlet brake cam (212B) at least have near each lower dead center
One protrusion, first exhaust drive cam (114A) and second exhaust driving cam (114B) at least to have one in exhaust stroke
A protrusion, first exhaust brake cam (112A) and second exhaust brake cam (112B) are under each near top dead center and exhaust
Stop nearby at least has a protrusion；
The air inlet driving cam or air inlet brake cam pass through air inlet driving member driving intake valve assembly；The exhaust gas drive is convex
Wheel or exhaust brake cam pass through exhaust-driven part driving exhaust valve assemblies.
2. compact high efficient multi-mode valve actuating mechanism according to claim 1, it is characterized in that: the inlet camshaft
(201) and/or the phase of exhaust camshaft (101) is adjusted using camshaft phase regulating mechanism.
3. compact high efficient multi-mode valve actuating mechanism according to claim 1, it is characterized in that: the air inlet driving member and row
Gas driving member is referred to as driving member, and the driving member uses rocker arm, very cup-rocker arm or very cup-push rod-rocker arm transmission mechanism,
Or driving member uses Hydraulic Main from piston type transmission mechanism, mechanical type lever or more bar transmission mechanisms.
4. the working method of compact high efficient multi-mode valve actuating mechanism according to claim 1, it is characterized in that: the mechanism has
Standby driving cam and brake cam；The axial position arbitrary arrangement of air inlet the driving cam and air inlet brake cam, exhaust are driven
The axial position arbitrary arrangement of moving cam and exhaust brake cam is respectively left cam and right cam according to position name；
When the cam of driving member being driven to be left cam, the work of the first switching mechanism drives the cam of driving member by left cam
Switch to right cam；
When the cam of driving member being driven to be right cam, the work of the second switching mechanism drives the cam of driving member by right cam
Switch to left cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910236814.8A CN109958494A (en) | 2019-03-27 | 2019-03-27 | A kind of compact high efficient multi-mode valve actuating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910236814.8A CN109958494A (en) | 2019-03-27 | 2019-03-27 | A kind of compact high efficient multi-mode valve actuating mechanism |
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| Publication Number | Publication Date |
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| CN109958494A true CN109958494A (en) | 2019-07-02 |
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ID=67024975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910236814.8A Pending CN109958494A (en) | 2019-03-27 | 2019-03-27 | A kind of compact high efficient multi-mode valve actuating mechanism |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007002802A1 (en) * | 2007-01-18 | 2008-07-24 | Audi Ag | Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation |
| CN107023342A (en) * | 2017-06-07 | 2017-08-08 | 大连理工大学 | A kind of change pattern valve-driving system |
| CN107060942A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of compact multimode formula valve-driving system |
| CN107060940A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of multi-mode valve-driving system |
-
2019
- 2019-03-27 CN CN201910236814.8A patent/CN109958494A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007002802A1 (en) * | 2007-01-18 | 2008-07-24 | Audi Ag | Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation |
| CN107023342A (en) * | 2017-06-07 | 2017-08-08 | 大连理工大学 | A kind of change pattern valve-driving system |
| CN107060942A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of compact multimode formula valve-driving system |
| CN107060940A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of multi-mode valve-driving system |
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Application publication date: 20190702 |
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