CN102400725A - Engine including variable valve lift mechanism - Google Patents
Engine including variable valve lift mechanism Download PDFInfo
- Publication number
- CN102400725A CN102400725A CN2011102653013A CN201110265301A CN102400725A CN 102400725 A CN102400725 A CN 102400725A CN 2011102653013 A CN2011102653013 A CN 2011102653013A CN 201110265301 A CN201110265301 A CN 201110265301A CN 102400725 A CN102400725 A CN 102400725A
- Authority
- CN
- China
- Prior art keywords
- engine
- cam lobe
- camshaft
- valve lift
- air valve
- 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.)
- Pending
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Classifications
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- 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
- F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
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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
- F01L13/0015—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
- F01L13/0047—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 the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
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- 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
- F02D13/0261—Controlling the valve overlap
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- 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
Abstract
The invention relates to an engine including a variable valve lift mechanism. Specifically, the invention provides an engine assembly may including an engine structure, an engine valve, a valve lift mechanism, and first and second camshafts. The engine structure may define a combustion chamber and a port in communication with the combustion chamber. The engine valve may be supported by the engine structure and displaceable between an open position where the port is in communication with the combustion chamber and a closed position to isolate the port from communication with the combustion chamber. The valve lift mechanism may be engaged with the engine valve. The first camshaft may be rotationally supported by the engine structure and may include a first cam lobe engaged with the valve lift mechanism. The second camshaft may be rotationally supported by the engine structure and may include a second cam lobe engaged with the valve lift mechanism.
Description
Technical field
The present invention relates to engine valve parts assembly.
Background technique
This part provides the background information that is associated with the present invention, and it is not necessarily existing technology.
Motor generally includes camshaft, to activate intake valve and/or exhaust valve.Camshaft can comprise the cam lobe that engages with air valve lift range mechanism, so that open and close valve.Can be changed the correct time that valve is opened and/or closed by the cam phaser that is coupled to camshaft.
Summary of the invention
A kind of engine assembly, it can comprise: engine structure, engine valve, air valve lift range mechanism and first camshaft and second camshaft.The port that engine structure can limit the firing chamber and be communicated with the firing chamber.Engine valve can be supported by engine structure, and can between open position and closed position, be shifted, and in the time of in open position, port is communicated with the firing chamber, and closed position is then with port isolation, in order to avoid be communicated with the firing chamber.Air valve lift range mechanism can engage with engine valve.First camshaft can be supported by engine structure rotatably, and can comprise first cam lobe that engages with air valve lift range mechanism.Second camshaft can be supported by engine structure rotatably, and can comprise second cam lobe that engages with air valve lift range mechanism.
A kind of method of actuating engine valve, it can comprise makes engine valve be displaced to open position with the first valve lift pattern from closed position, so that being communicated with between motor port and the engine chamber to be provided.Displacement can comprise that first cam lobe and second cam lobe on second camshaft on first camshaft engages air valve lift range mechanism, and said air valve lift range mechanism engages with engine valve.First camshaft can rotate with respect to second camshaft.Make first camshaft with respect to after second camshaft rotation; Via engaging between first and second cam lobes and the air valve lift range mechanism, engine valve can be displaced to open position from closed position with the duaspiracle lift pattern that is different from the first valve lift pattern.
The present invention also comprises following scheme:
1. 1 kinds of engine assemblys of scheme comprise:
Engine structure, the port that it limits the firing chamber and is communicated with said firing chamber;
Engine valve, it is supported by said engine structure, and can between open position and closed position, be shifted; In said open position; Said port is communicated with said firing chamber, and said closed position is then with said port isolation, in order to avoid be communicated with said firing chamber;
Air valve lift range mechanism, it engages with said engine valve;
First camshaft, it is supported by said engine structure rotatably, and comprises first cam lobe that engages with said air valve lift range mechanism; And
Second camshaft, it is supported by said engine structure rotatably, and comprises second cam lobe that engages with said air valve lift range mechanism.
Scheme 2. is according to scheme 1 described engine assembly; Also comprise first cam phaser; Said first cam phaser is coupled to said first camshaft; And can operate so that said first camshaft rotates between the primary importance and the second place with respect to said second camshaft, so that change the lift pattern of said engine valve.
Scheme 3. is according to scheme 2 described engine assemblys; Wherein, When said first camshaft is in the said primary importance, when engaging with air valve lift range mechanism, second summit that the first peak of said first cam lobe withstands on said second cam lobe engages with said air valve lift range mechanism.
Scheme 4. is according to scheme 3 described engine assemblys; Wherein, When said first camshaft was in the said second place, second summit that the first peak of said first cam lobe withstands on said second cam lobe departed from said air valve lift range mechanism rotatably when engaging with air valve lift range mechanism.
Scheme 5. also comprises second cam phaser according to scheme 2 described engine assemblys, and said second cam phaser is coupled to said second camshaft, and can operate so that said second camshaft rotates with respect to said first camshaft.
Scheme 6. is according to scheme 5 described engine assemblys; Wherein, When said first cam lobe was in complete delay position and said second cam lobe and is in the complete anticipated future position, said lift pattern limited the maximum valve lift height of said engine valve.
Scheme 7. is according to scheme 6 described engine assemblys; Wherein, When said first cam lobe was in complete delay position and said second cam lobe and is in the complete delay position, said lift pattern was defined for the maximum delay situation of opening of said engine valve.
Scheme 8. is according to scheme 6 described engine assemblys; Wherein, When said first cam lobe was in complete anticipated future position and said second cam lobe and is in the complete anticipated future position, the maximum of opening that said lift pattern is defined for said engine valve shifted to an earlier date situation.
Scheme 9. is according to scheme 6 described engine assemblys; Wherein, When said first cam lobe was in complete anticipated future position and said second cam lobe and is in the complete delay position, the maximum that said lift pattern limits said engine valve was opened the endurance.
11. 1 kinds of methods of scheme comprise:
Make engine valve be displaced to open position from closed position with the first valve lift pattern; So that being communicated with between motor port and the engine chamber is provided; Said displacement comprises that first cam lobe and second cam lobe on second camshaft on first camshaft engages air valve lift range mechanism, and said air valve lift range mechanism engages with said engine valve;
Said first camshaft is rotated with respect to said second camshaft; And
After rotation; Via engaging between said first cam lobe and said second cam lobe and the said air valve lift range mechanism, make said engine valve be displaced to said open position from said closed position with the duaspiracle lift pattern that is different from the said first valve lift pattern.
Scheme 13. is according to scheme 12 described methods, and wherein, the said first valve lift pattern comprises: when the summit of said second cam lobe engaged with said air valve lift range mechanism, the summit of said first cam lobe engaged with said air valve lift range mechanism.
Scheme 15. also comprises according to scheme 12 described methods: via second cam phaser that is coupled to said second camshaft said second camshaft is rotated with respect to said first camshaft.
Scheme 17. is according to scheme 16 described methods, wherein, when said first cam lobe is in complete delay position and said second cam lobe and is in the complete delay position, is defined for the maximum delay situation of the displacement of said engine valve.
Scheme 19. is according to scheme 16 described methods, and wherein, when said first cam lobe was in complete anticipated future position and said second cam lobe and is in complete delay position, the maximum that limits said engine valve was opened the endurance.
It is obvious that other field of applicability will become through the description that provides at this.Description in this summary of the invention and concrete example only are intended to be used for purpose of illustration, and are not intended to limit scope of the present invention.
Description of drawings
Accompanying drawing described here only is used for purpose of illustration, is not intended to limit by any way scope of the present invention.
Fig. 1 is the show in schematic partial sections according to engine assembly of the present invention, and this engine assembly comprises and is in first and second camshafts primary importance, that engage with air valve lift range mechanism;
Fig. 2 is that first and second camshafts and air valve lift range mechanism shown in Figure 1 is in the schematic representation in the second place;
Fig. 3 is that first and second camshafts and air valve lift range mechanism shown in Figure 1 is in the schematic representation in the 3rd position;
Fig. 4 is that first and second camshafts and air valve lift range mechanism shown in Figure 1 is in the schematic representation in the 4th position; And
Fig. 5 is the graphic illustration by lift pattern scope provided by the invention.
Corresponding reference character shows corresponding components in some views of whole accompanying drawings.
Embodiment
Referring now to accompanying drawing example of the present invention is described more fully.On the following illustrative in nature only is exemplary, and is not intended to be used to limit the present invention, its application or use.
The embodiment of example is provided, has made that the disclosure will be detailed, and fully expressed said scope to those skilled in the art.Many details have been stated, so that the detailed understanding to embodiments of the invention is provided such as the example of concrete parts, apparatus and method.It should be apparent to those skilled in the art that and needn't adopt detail, the embodiment of example can come concrete the realization with many different forms, and should not be interpreted into restriction scope of the present invention.In the embodiment of some example, be not described in detail well-known process, well-known apparatus structure and well-known technology.
When element or layer are called as " on another element or layer ", " being engaged to ", " being connected to " or " being coupled to " another element or layer; It can be directly on other elements or layer, directly be engaged to, be connected directly to or directly be coupled to other elements or layer, perhaps can have element or layer between two parties.By contrast, when element is called as " directly on another element or layer ", " directly being engaged to ", " being connected directly to " or " directly being coupled to " another element or layer, possibly there are not element or layer between two parties.Other literal that are used to describe the relation between the element should explain in a similar manner (for example, " and ... between " relatively " and directly exist ... between ", " adjacent " " direct neighbor " relatively, or the like).As at this land used that makes, term " and/or " comprise relevant list in the item one or multinomial arbitrarily with all combinations.
Although term first, second, third or the like can be used for describing various elements, parts, zone, layer and/or part at this, these elements, parts, zone, layer and/or part are not limited by these terms should.These terms can only be used for an element, parts, zone, layer or part and another zone, layer or part are differentiated.Only if by clear from context ground indication, otherwise the term such as " first ", " second " and other with the term of numeral when the orderliness in secret or the meaning in proper order when this uses.Therefore, first element of below discussing, parts, zone, layer or part can be called second element, parts, zone, layer or part under the situation of the embodiment's who does not depart from example instruction.
First and second camshafts 14,16 can laterally depart from (not coaxial) each other, and can roughly extend parallel to each other.26,28 lateral deviations each other of first and second cam lobes, and vertically aim at each other.More specifically, second cam lobe 28 can radially separate with the outer periphery of first cam lobe 26.
Air valve lift range mechanism 24 can comprise swinging arm 42, and it defines first end 44 that engages with first cam lobe 26, second end 46 that engages with second cam lobe 28 and at first and second end 44, pivot 50 between 46.Air valve lift range mechanism 24 can be limited to first and second end 44, the body of side extending between 46.Therefore, first and second ends 44,46 can form the lateral ends of air valve lift range mechanism 24.First end 44 can comprise first roller members 52 that engages with first cam lobe 26, and second end 46 can comprise second roller members 54 that engages with second cam lobe 28.Engine valve 22 can be pivotally coupled to air valve lift range mechanism 24 at pivot 50 places; And can overcome the power of valve spring 58 so that be displaced to open position (Fig. 1) through first and second cam lobes 26,28, to be provided in the engine structure 12 being communicated with between the motor port 60 that limits and the engine chamber 62 from the closed position (not shown).
Fig. 1-4 illustrates the four kinds of lift situations (lift pattern (lift profiles)) that provided by engine valve 22, and Fig. 5 then illustrates each in the lift pattern with the figure line form.In Fig. 5, the Y axle illustrates valve lift, and the X axle illustrates crankangle.The lift endurance of engine valve 22 can be controlled through shifting to an earlier date and postponing first and second cam lobes 26,28 via first and second cam phasers 18,20 with height.First and second camshafts 14,16 and therefore first and second cam lobes 26,28 can relative to each other rotate.More specifically, first camshaft 14 can rotate to the second place (shifting to an earlier date fully) from primary importance (postponing fully) along first sense of rotation (R1) of first camshaft 14.First camshaft 14 can be displaced to any position between first and second position in addition.
Similarly, second camshaft 16 can (postpone) to rotate to the 4th position (shifting to an earlier date fully) fully along second sense of rotation (R2) of second camshaft 16 from the 3rd position.Second camshaft 16 can be displaced to any position between the 3rd and the 4th position in addition.Although it is opposite each other that first and second sense of rotation (R1, R2) are depicted as, it should be understood that first and second camshafts 14,16 are alternately along identical direction rotation.
Fig. 1 illustrates the maximum valve lift height situation of being shown by the curve among Fig. 5 (C1) graphical map.Maximum valve lift height situation can be corresponding to minimum valve lift endurance situation.When first camshaft 14 is in the primary importance and second camshaft 16 when being in the 4th position, first summit 34 of first cam lobe 26 can engage with air valve lift range mechanism 24 when second summit 40 of second cam lobe 28 engages with air valve lift range mechanism 24.As stated, the primary importance of first camshaft 14 can be first cam lobe 26 complete delay position is provided, and the 4th position of second camshaft 16 can be second cam lobe 28 complete anticipated future position is provided.Therefore, when first cam lobe 26 was in complete delay position and second cam lobe 28 and is in the complete anticipated future position, lift pattern (curve (C1)) can limit the maximum valve lift height of engine valve 22.
Fig. 2 illustrates the maximum of being shown by the curve among Fig. 5 (C2) graphical map that engine valve opens that is used for and shifts to an earlier date situation.During maximum shifted to an earlier date situation, first camshaft 14 can be in the second place, and second camshaft 16 can be in the 3rd position.Therefore, when first cam lobe 26 is in the complete anticipated future position and second cam lobe 28 when being in the complete anticipated future position, the maximum of opening that lift pattern (curve (C2)) can be defined for engine valve 22 shifts to an earlier date situation.When first camshaft 14 is in the primary importance and second camshaft 16 when being in the 3rd position, second summit 40 of second cam lobe 28 can depart from air valve lift range mechanism 24 rotatably when first summit 34 of first cam lobe 26 engages with air valve lift range mechanism 24.Maximum situation in advance can provide valve early to open incident with respect to the normal running situation usually.Peak value engine air valve lift during maximum shifts to an earlier date situation can occur early than the peak value engine air valve lift that during above-mentioned maximum valve lift height situation, occurs.
Fig. 3 illustrates by what the curve among Fig. 5 (C3) graphical map showed and is used for the maximum delay situation that engine valve is opened.During the maximum delay situation, first camshaft 14 can be in the second place, and second camshaft 16 can be in the 3rd position.Therefore, when first cam lobe 26 was in complete delay position and second cam lobe 28 and is in the complete delay position, lift pattern (curve (C3)) can be defined for the maximum delay situation of opening engine valve 22.When first camshaft 14 is in the second place and second camshaft 16 when being in the 4th position, first summit 34 of first cam lobe 26 can depart from air valve lift range mechanism 24 rotatably when second summit 40 of second cam lobe 28 engages with air valve lift range mechanism 24.The maximum delay situation can provide the valve of delay to open incident with respect to the normal running situation usually.Can occur lately than the peak value engine air valve lift that during above-mentioned maximum valve lift height situation, occurs at the peak value engine air valve lift during the maximum delay situation.
Fig. 4 illustrates the maximum valve lift endurance situation of being shown by the curve among Fig. 5 (C4) graphical map (minimum altitude).Maximum valve lift endurance situation can be corresponding to minimum valve lift height situation.First summit 34 of first cam lobe 26 and second summit 40 of second cam lobe 28 out-phase rotatably during maximum valve lift endurance situation.More specifically, during maximum valve lift endurance situation, first camshaft 14 can be in the second place, and second camshaft 16 can be in the 3rd position.As stated, the second place of first camshaft 14 can be first cam lobe 26 complete anticipated future position is provided, and the 3rd position of second camshaft 16 can be second cam lobe 28 complete delay position is provided.Therefore, when first cam lobe 26 is in the complete anticipated future position and second cam lobe 28 when being in the complete delay position, lift pattern (curve (C4)) can limit the maximum of engine valve 22 and open the endurance.
Air valve lift range mechanism 24 is under the situation of the lift mechanisms that does not utilize hydraulic actuating; Through regulating first and second cam lobe 26,28 phase place relative to each other, the variation in engine air valve lift height, endurance and correct time that engine valve opens is provided.During operation, engine valve 22 can be displaced to open position (Fig. 1) from the closed position (not shown) with the first valve lift pattern, so that being communicated with between motor port 60 and the engine chamber 62 to be provided.Displacement can comprise that second cam lobe 28 on first cam lobe 26 and second camshaft 16 on first camshaft 14 engages air valve lift range mechanisms 24, and said air valve lift range mechanism 24 engages with engine valve 22.
Make first camshaft 14 with respect to the rotation of second camshaft 16 after; Via engaging between first and second cam lobes 26,28 and the air valve lift range mechanism 24, engine valve 22 can be displaced to open position from closed position with the duaspiracle lift pattern that is different from the first valve lift pattern.First camshaft 14 can be comprised with respect to 16 rotations of second camshaft activate first cam phaser 18 that is coupled to first camshaft 14.Also can make second camshaft 16 with respect to 14 rotations of first camshaft via second cam phaser 20 that is coupled to second camshaft 16.
The first valve lift pattern can comprise: when second summit 40 of second cam lobe 28 engaged with air valve lift range mechanism 24, first summit 34 of first cam lobe 26 engaged with air valve lift range mechanism 24.Duaspiracle lift pattern can comprise: when second summit 40 of second cam lobe 28 engaged with air valve lift range mechanism 24, first summit 34 of first cam lobe 26 departed from air valve lift range mechanism 24 rotatably.
When first cam lobe 26 was in complete delay position and second cam lobe 28 and is in the complete anticipated future position, engine valve 22 can be displaced to the maximum valve lift height.When first cam lobe 26 is in complete delay position and second cam lobe 28 and is in the complete delay position, can be defined for the maximum delay situation of the displacement of engine valve 22.When first cam lobe 26 was in complete anticipated future position and second cam lobe 28 and is in the complete anticipated future position, the maximum that can be defined for the displacement of engine valve 22 shifted to an earlier date situation.When first cam lobe 26 was in complete anticipated future position and second cam lobe 28 and is in the complete delay position, the maximum that can limit engine valve 22 was opened the endurance.
Making engine valve 22 be displaced to open position with duaspiracle lift pattern from closed position can comprise: first cam lobe 26 engages with first end 44 of air valve lift range mechanism 24 and second cam lobe 28 engages with second end 46 of air valve lift range mechanism 24.Engaging between first and second cam lobes 26,28 and the air valve lift range mechanism 24 can make air valve lift range mechanism 24 around being shifted rotatably at first and second end 44 of air valve lift range mechanism 24, pivot 50 between 46, thereby duaspiracle lift pattern is provided.
Claims (10)
1. engine assembly comprises:
Engine structure, the port that it limits the firing chamber and is communicated with said firing chamber;
Engine valve, it is supported by said engine structure, and can between open position and closed position, be shifted; In said open position; Said port is communicated with said firing chamber, and said closed position is then with said port isolation, in order to avoid be communicated with said firing chamber;
Air valve lift range mechanism, it engages with said engine valve;
First camshaft, it is supported by said engine structure rotatably, and comprises first cam lobe that engages with said air valve lift range mechanism; And
Second camshaft, it is supported by said engine structure rotatably, and comprises second cam lobe that engages with said air valve lift range mechanism.
2. engine assembly according to claim 1; Also comprise first cam phaser; Said first cam phaser is coupled to said first camshaft; And can operate so that said first camshaft rotates between the primary importance and the second place with respect to said second camshaft, so that change the lift pattern of said engine valve.
3. engine assembly according to claim 2; Wherein, When said first camshaft is in the said primary importance, when engaging with air valve lift range mechanism, second summit that the first peak of said first cam lobe withstands on said second cam lobe engages with said air valve lift range mechanism.
4. engine assembly according to claim 3; Wherein, When said first camshaft was in the said second place, second summit that the first peak of said first cam lobe withstands on said second cam lobe departed from said air valve lift range mechanism rotatably when engaging with air valve lift range mechanism.
5. engine assembly according to claim 2 also comprises second cam phaser, and said second cam phaser is coupled to said second camshaft, and can operate so that said second camshaft rotates with respect to said first camshaft.
6. engine assembly according to claim 5; Wherein, When said first cam lobe was in complete delay position and said second cam lobe and is in the complete anticipated future position, said lift pattern limited the maximum valve lift height of said engine valve.
7. engine assembly according to claim 6; Wherein, When said first cam lobe was in complete delay position and said second cam lobe and is in the complete delay position, said lift pattern was defined for the maximum delay situation of opening of said engine valve.
8. engine assembly according to claim 6; Wherein, When said first cam lobe was in complete anticipated future position and said second cam lobe and is in the complete anticipated future position, the maximum of opening that said lift pattern is defined for said engine valve shifted to an earlier date situation.
9. engine assembly according to claim 6; Wherein, When said first cam lobe was in complete anticipated future position and said second cam lobe and is in the complete delay position, the maximum that said lift pattern limits said engine valve was opened the endurance.
10. a method comprises:
Make engine valve be displaced to open position from closed position with the first valve lift pattern; So that being communicated with between motor port and the engine chamber is provided; Said displacement comprises that first cam lobe and second cam lobe on second camshaft on first camshaft engages air valve lift range mechanism, and said air valve lift range mechanism engages with said engine valve;
Said first camshaft is rotated with respect to said second camshaft; And
After rotation; Via engaging between said first cam lobe and said second cam lobe and the said air valve lift range mechanism, make said engine valve be displaced to said open position from said closed position with the duaspiracle lift pattern that is different from the said first valve lift pattern.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/877550 | 2010-09-08 | ||
| US12/877,550 US20120055426A1 (en) | 2010-09-08 | 2010-09-08 | Engine including variable valve lift mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102400725A true CN102400725A (en) | 2012-04-04 |
Family
ID=45769728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102653013A Pending CN102400725A (en) | 2010-09-08 | 2011-09-08 | Engine including variable valve lift mechanism |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120055426A1 (en) |
| CN (1) | CN102400725A (en) |
| DE (1) | DE102011111675A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033521B (en) * | 2021-12-13 | 2023-12-22 | 南通职业大学 | Double-cam variable valve timing mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075611U (en) * | 1983-10-31 | 1985-05-27 | いすゞ自動車株式会社 | Valve mechanism |
| DE3531000A1 (en) * | 1985-08-30 | 1986-08-28 | Herbert Dipl.-Ing. 8000 München Gohle | Device for reducing the throttle losses in piston engines under partial load by phase control of the valves |
| US5107805A (en) * | 1991-07-18 | 1992-04-28 | Borg-Warner Automotive Transmission & Engine Components Corporation | Camshaft with extra cam to increase the magnitude of torque pulsations therein |
| CN1683753A (en) * | 2004-04-13 | 2005-10-19 | 三菱自动车工业株式会社 | Variable valve unit for internal combustion engine |
| CN101435350A (en) * | 2007-11-15 | 2009-05-20 | 现代自动车株式会社 | Variable valve system for vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2180597A (en) * | 1985-09-13 | 1987-04-01 | Frederick Arthur Summerlin | Valve control |
| NL1013811C2 (en) * | 1999-12-09 | 2000-11-28 | Prometheus Engineering B V | Hydraulic valve actuation mechanism. |
| DE602004004997T2 (en) * | 2004-01-16 | 2007-11-08 | C.R.F. S.C.P.A. | Internal combustion engine with a single overhead camshaft for the mechanical control of the exhaust valves and the electro-hydraulic control of the intake valves |
-
2010
- 2010-09-08 US US12/877,550 patent/US20120055426A1/en not_active Abandoned
-
2011
- 2011-08-26 DE DE102011111675A patent/DE102011111675A1/en not_active Withdrawn
- 2011-09-08 CN CN2011102653013A patent/CN102400725A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075611U (en) * | 1983-10-31 | 1985-05-27 | いすゞ自動車株式会社 | Valve mechanism |
| DE3531000A1 (en) * | 1985-08-30 | 1986-08-28 | Herbert Dipl.-Ing. 8000 München Gohle | Device for reducing the throttle losses in piston engines under partial load by phase control of the valves |
| US5107805A (en) * | 1991-07-18 | 1992-04-28 | Borg-Warner Automotive Transmission & Engine Components Corporation | Camshaft with extra cam to increase the magnitude of torque pulsations therein |
| CN1683753A (en) * | 2004-04-13 | 2005-10-19 | 三菱自动车工业株式会社 | Variable valve unit for internal combustion engine |
| CN101435350A (en) * | 2007-11-15 | 2009-05-20 | 现代自动车株式会社 | Variable valve system for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120055426A1 (en) | 2012-03-08 |
| DE102011111675A1 (en) | 2012-05-31 |
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Application publication date: 20120404 |