CN101660435B - Hydraulic camshaft and hydraulic control system thereof - Google Patents
Hydraulic camshaft and hydraulic control system thereof Download PDFInfo
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- CN101660435B CN101660435B CN200910144938A CN200910144938A CN101660435B CN 101660435 B CN101660435 B CN 101660435B CN 200910144938 A CN200910144938 A CN 200910144938A CN 200910144938 A CN200910144938 A CN 200910144938A CN 101660435 B CN101660435 B CN 101660435B
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- 230000006698 induction Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000006837 decompression Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention relates to a hydraulic camshaft and a hydraulic control system thereof. When an engine runs in a middle-high load work condition, an ECU respectively transmits four groups of switching signals to a solenoid valve according to a cam phase sensor, and the solenoid valve respectively changes the oil pressure of oil circuits which are connected with four hydraulic control parts on the camshaft according to the signals; the states of the hydraulic control parts of two adjacent cylinders are opposite; and switch is carried out at the position of a base circle in sequence by each cylinder. The hydraulic camshaft and the hydraulic control system thereof have simple and practical structure as well as two-stage valve lift, can improve the engine performance and fuel economy, and simultaneously reduce emission.
Description
Technical field
The present invention relates to a kind of hydraulic camshaft and hydraulic control system thereof, especially the hydraulic electromagnetic camshaft of motor car engine.
Background technique
At present; In the world to the technology of two sections valve lifts comparative maturity; Usually the technology that reaches this purpose has a lot, can select the hydraulic tappet or the rocking arm of two-part, and wherein more representational is companies such as Schaeffler, Eton, Delphi; Also can select two kinds of driving cams, for example Honda i-vtec etc.
Except relying on independent ECU, generally adopt hydraulic system for the control mode of these component, compare with Electromagnetic Control; The design of Hydraulic System difficulty is less; But the time of implementation is longer, and for concerning the less demanding motor of instantaneous degree, it is first-selected that hydraulic control system remains.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure and can realize the hydraulic camshaft and the hydraulic control system thereof of fast response.
Another object of the present invention provides and a kind ofly can change valve lift, improves the hydraulic electromagnetic camshaft of engine performance.
To achieve these goals, the technological scheme that the present invention adopted is:
(1) there is the hydraulic control part between camshaft front end in this mechanism and the camshaft body, can makes camshaft axially move 10mm;
(2) driving cam of this camshaft is made up of two kinds of cams, can select driving cam according to the axial position of camshaft;
(3) the camshaft axial position is decided by the oil pressure in the oil pocket, and this oil pressure is by independently ECU and solenoid valve are handled jointly;
(4) quick response process is 300 crank angles between the most often, can avoid producing catch fire, malcombustion such as tempering;
(5) each cylinder hydraulic control system independently can make motor when switching, select only switching time, has improved the stability when motor switches.
The present invention relies on hydraulic control to accomplish each cylinder cam successively and switches aspect the control execution, and optimization control system to greatest extent is for the motor transient response provides feasible scheme.Simultaneously can only change the lift of individual cylinder separately according to the needs of engine operating condition.This technology is applicable to cylinder deactivation engine.
Concrete technological scheme is following:
A kind of hydraulic camshaft comprises the camshaft front end, driving cam, and camshaft body and signal wheel, said hydraulic control assembly is arranged between camshaft front end and the camshaft body, and it makes hydraulic camshaft can axially move 10mm; Said driving cam is made up of two kinds of cams, and it can be selected according to the axial position of camshaft.
Said hydraulic control assembly comprises oilhole, and guiding groove and oil pocket, oilhole link to each other with outside oil duct and lead to oil pocket, the oil pressure decision camshaft axial position in the oil pocket, and guiding groove connects camshaft and limits the axial motion of camshaft.
Also comprise ECU and solenoid valve, it controls the oil pressure in the oil pocket jointly.
A kind of hydraulic electromagnetic camshaft comprises the camshaft front end, the camshaft body; Solenoid valve and ECU ECU, a hydraulic control assembly are arranged between camshaft front end and the camshaft body, and it can make hydraulic camshaft axially move; This hydraulic control assembly comprises oilhole; Guiding groove and oil pocket, oilhole link to each other with outside oil duct and lead to oil pocket, the oil pressure decision camshaft axial position in the oil pocket; Guiding groove connects camshaft and limits the axial motion of camshaft, and said ECU and solenoid valve are controlled the oil pressure in the oil pocket jointly.
The hydraulic control system of said hydraulic camshaft comprises solenoid valve and ECU ECU, and said solenoid valve and ECU ECU control the hydraulic pressure in the hydraulic control assembly jointly.
Each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system.
First, second, third and fourth cylinder is respectively equipped with the first cylinder hydraulic control, the second cylinder hydraulic control, the 3rd cylinder hydraulic control, the 4th cylinder hydraulic control.
Also comprise sensor, its induction is also transmitted signal to ECU ECU, and ECU ECU is sent to solenoid valve with 4 groups of switching signals, and solenoid valve is according to the oil pressure of oil circuit in the first to fourth cylinder hydraulic control on the signal difference control connection camshaft.
Said sensor is the cam phase sensor, the signal that its induced signal wheel transmits.
The hydraulic control partial status of two adjacent cylinder is opposite, i.e. the first cylinder hydraulic control, the 3rd cylinder hydraulic control are when opening, and the second cylinder hydraulic control, the 4th cylinder hydraulic control cylinder switch to each cylinder and switch in the basic circle position successively for closing.
Compare with present existing technology, beneficial effect of the present invention is embodied in: simple in structure, practical; Valve lift is a two-part; Can improve engine performance, fuel economy, reduce discharging simultaneously; Concrete advantage is following:
(1) realize variable valve lift, engine performance significantly improves;
(2) discharging, oil consumption are starkly lower than the motor with discharge capacity
(3) simple in structure, compact, reasonable in design, the motor overall volume does not have obvious change
(4) each cylinder is controlled separately, and control mode is flexible and changeable
(5) strengthened the moment of torsion output of motor when low speed
Description of drawings
Fig. 1: hydraulic control part partial sectional view of the present invention
Fig. 2: hydraulic control closed condition sectional view
Fig. 3: hydraulic control opening state sectional view
Fig. 4: system schematic
1-camshaft front end, 2-hydraulic control assembly, 3-driving cam, 4-camshaft body, 5-signal wheel, 6-oilhole, 7-guiding groove, 8-oil pocket, the 9-first cylinder hydraulic control, the 10-second cylinder hydraulic control, 11-the 3rd cylinder hydraulic control, 12-the 4th cylinder hydraulic control
Embodiment
Describe the present invention according to accompanying drawing below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
This system is as shown in Figure 4, mainly is made up of hydraulic electromagnetic camshaft, solenoid valve, sensor and ECU etc.
When motor operates in middle and high load working condition; ECU is transferred to solenoid valve with 4 groups of switching signals respectively according to the cam phase sensor, and solenoid valve changes the oil pressure that connects 4 hydraulic control part oil circuits on the camshaft respectively according to this signal, and the hydraulic control partial status of two adjacent cylinder is opposite; Promptly 9,11 when opening; 10,12 cylinders switch to each cylinder and switch in the basic circle position successively then for closing, and whole switch step is following:
(1) 1 cylinder hydraulic control 9 decompressions, 10 superchargings of 2 cylinder hydraulic controls are simultaneously accomplished 1 cylinder cam and are switched;
(2) 2 cylinder hydraulic controls 10 decompressions are accomplished 2 cylinder cams and are switched;
(3) 3 cylinder hydraulic controls 11 decompressions, 12 superchargings of 4 cylinder hydraulic controls are simultaneously accomplished 3 cylinder cams and are switched;
(4) 4 cylinder hydraulic controls 12 decompressions are accomplished 4 cylinder cams and are switched
When switching to low lift, whole process is opposite with above step.
In the process of carrying out the switching of driving cam state, the oil of outside oil duct is from oilhole 6 turnover oil pockets 8, and the axial motion of camshaft is by restriction, the connection of guiding groove 7 simultaneously.
Fundamental diagram in conjunction with top is further described the present technique scheme,
A kind of hydraulic electromagnetic camshaft comprises camshaft front end 1, camshaft body 4; Solenoid valve and ECU ECU, a hydraulic control assembly 2 are arranged between camshaft front end 1 and the camshaft body 4, and it axially moves hydraulic camshaft; This hydraulic control assembly 2 comprises oilhole 6; Guiding groove 7 and oil pocket 8, oilhole 6 link to each other with outside oil duct and lead to oil pocket 8, the oil pressure decision camshaft axial position in the oil pocket 8; Guiding groove 7 connects camshaft and limits the axial motion of camshaft, and said ECU and solenoid valve are controlled the oil pressure in the oil pocket 8 jointly.
The hydraulic control system of said hydraulic camshaft comprises the cam phase sensor, solenoid valve and ECU ECU; Said solenoid valve and ECU ECU control the hydraulic pressure in the hydraulic control assembly 2 jointly, and each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system, and promptly first, second, third and fourth cylinder is respectively equipped with the first cylinder hydraulic control 9; The second cylinder hydraulic control, 10, the three cylinder hydraulic controls, 11, the four cylinder hydraulic controls 12; Sensor sensing also transmits signal to ECU ECU; ECU ECU is sent to solenoid valve with 4 groups of switching signals, and solenoid valve is according to first to fourth cylinder hydraulic control 9,10 on the signal difference control connection camshaft; The oil pressure of oil circuit in 11,12.The hydraulic control partial status of two adjacent cylinder is opposite, i.e. the first cylinder hydraulic control 9, the 3rd cylinder hydraulic control 11 are when opening, and the second cylinder hydraulic control 10, the 4th cylinder hydraulic control 12 cylinders switch to each cylinder and switch in the basic circle position successively for closing.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; Or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (9)
1. hydraulic camshaft; It is characterized in that, comprise camshaft front end (1), hydraulic control assembly (2); Driving cam (3); Camshaft body (4) and signal wheel (5), said hydraulic control assembly (2) is arranged between camshaft front end (1) and the camshaft body (4), and it makes hydraulic camshaft can axially move 10mm; Said driving cam (3) is made up of two kinds of cams, and it can be selected according to the axial position of camshaft; Said hydraulic control assembly (2) comprises oilhole (6); Guiding groove (7) and oil pocket (8); Oilhole (6) links to each other with outside oil duct and leads to oil pocket (8), the oil pressure decision camshaft axial position in the oil pocket (8), and guiding groove (7) connects camshaft and limits the axial motion of camshaft.
2. hydraulic camshaft as claimed in claim 1 is characterized in that, also comprises ECU and solenoid valve, and it controls the oil pressure in the oil pocket (8) jointly.
3. a hydraulic electromagnetic camshaft is characterized in that, comprises camshaft front end (1); Camshaft body (4), solenoid valve and ECU ECU, a hydraulic control assembly (2) are arranged between camshaft front end (1) and the camshaft body (4); It can make hydraulic camshaft axially move, and this hydraulic control assembly (2) comprises oilhole (6), guiding groove (7) and oil pocket (8); Oilhole (6) links to each other with outside oil duct and leads to oil pocket (8); Oil pressure decision camshaft axial position in the oil pocket (8), guiding groove (7) connects camshaft and limits the axial motion of camshaft, and said ECU and solenoid valve are controlled the oil pressure in the oil pocket (8) jointly.
4. one kind is used to control the hydraulic control system of hydraulic camshaft according to claim 1, it is characterized in that, comprises solenoid valve and ECU ECU, and said solenoid valve and ECU ECU control the hydraulic pressure in the hydraulic control assembly (2) jointly.
5. hydraulic control system as claimed in claim 4 is characterized in that, each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system.
6. hydraulic control system as claimed in claim 5 is characterized in that, first, second, third and fourth cylinder is respectively equipped with the first cylinder hydraulic control (9), the second cylinder hydraulic control (10), the 3rd cylinder hydraulic control (11), the 4th cylinder hydraulic control (12).
7. hydraulic control system as claimed in claim 6 is characterized in that, also comprises sensor; Its induction is also transmitted signal to ECU ECU; ECU ECU is sent to solenoid valve with 4 groups of switching signals, and solenoid valve is according to first to fourth cylinder hydraulic control (9,10 on the signal difference control connection camshaft; 11,12) oil pressure of oil circuit in.
8. hydraulic control system as claimed in claim 7 is characterized in that, said sensor is the cam phase sensor, the signal that its induced signal wheel (5) transmits.
9. like claim 7 or 8 described hydraulic control systems; It is characterized in that; The hydraulic control partial status of two adjacent cylinder is opposite; The i.e. first cylinder hydraulic control (9), the 3rd cylinder hydraulic control (11) are when opening, and the second cylinder hydraulic control (10), the 4th cylinder hydraulic control (12) cylinder switch to each cylinder and switch in the basic circle position successively for closing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910144938A CN101660435B (en) | 2009-09-14 | 2009-09-14 | Hydraulic camshaft and hydraulic control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910144938A CN101660435B (en) | 2009-09-14 | 2009-09-14 | Hydraulic camshaft and hydraulic control system thereof |
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| CN101660435A CN101660435A (en) | 2010-03-03 |
| CN101660435B true CN101660435B (en) | 2012-10-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071981B (en) * | 2011-01-31 | 2012-11-07 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN105508071B (en) * | 2014-10-14 | 2019-07-26 | 光阳工业股份有限公司 | Double cylinder engine air inlet arrangement for detecting and method for detecting |
| CN109630282B (en) * | 2018-11-30 | 2023-08-15 | 潍坊力创电子科技有限公司 | Engine oil supply advance angle electric control adjusting device |
| CN110566303A (en) * | 2019-09-24 | 2019-12-13 | 深圳臻宇新能源动力科技有限公司 | Engine camshaft and engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620744A1 (en) * | 1995-06-07 | 1996-12-12 | Volkswagen Ag | Influencing valve timing in IC engine |
| CN1160120A (en) * | 1995-10-03 | 1997-09-24 | 新苏舍柴油机有限公司 | Hydraulic valve drive |
| KR100521510B1 (en) * | 2003-05-12 | 2005-10-13 | 현대자동차주식회사 | Separation type cam shaft structure |
| GB2424256A (en) * | 2005-03-16 | 2006-09-20 | Mechadyne Ltd | SCP assembly with spring mounted on camshaft rather than within phaser housing |
| CN101107426A (en) * | 2005-01-27 | 2008-01-16 | 谢夫勒两合公司 | Electromagnetic hydraulic valve |
| CN101169055A (en) * | 2007-11-21 | 2008-04-30 | 刘若丹 | Rotor valve for stepless continuous adjusting air valve timing and valve travel |
-
2009
- 2009-09-14 CN CN200910144938A patent/CN101660435B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620744A1 (en) * | 1995-06-07 | 1996-12-12 | Volkswagen Ag | Influencing valve timing in IC engine |
| CN1160120A (en) * | 1995-10-03 | 1997-09-24 | 新苏舍柴油机有限公司 | Hydraulic valve drive |
| KR100521510B1 (en) * | 2003-05-12 | 2005-10-13 | 현대자동차주식회사 | Separation type cam shaft structure |
| CN101107426A (en) * | 2005-01-27 | 2008-01-16 | 谢夫勒两合公司 | Electromagnetic hydraulic valve |
| GB2424256A (en) * | 2005-03-16 | 2006-09-20 | Mechadyne Ltd | SCP assembly with spring mounted on camshaft rather than within phaser housing |
| CN101169055A (en) * | 2007-11-21 | 2008-04-30 | 刘若丹 | Rotor valve for stepless continuous adjusting air valve timing and valve travel |
Non-Patent Citations (1)
| Title |
|---|
| 陈金苗.奥迪2.8LV6FSI发动机气门升程***.《汽车维护与修理》.2009,(第1期),40-41. * |
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