CN2546635Y - Variable air door lift mechanism - Google Patents
Variable air door lift mechanism Download PDFInfo
- Publication number
- CN2546635Y CN2546635Y CN 02222780 CN02222780U CN2546635Y CN 2546635 Y CN2546635 Y CN 2546635Y CN 02222780 CN02222780 CN 02222780 CN 02222780 U CN02222780 U CN 02222780U CN 2546635 Y CN2546635 Y CN 2546635Y
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- tappet
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- cam
- valve
- camshaft
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Abstract
Disclosed is a variable valve lift mechanism, comprising a cylinder cover, a cam, a camshaft to drive the cam to rotate, valve tappets driven by the cam and a valve controlled by the tappets. A high-speed cam is arranged on the camshaft and two low-speed cams are symmetrically arranged on both sides of the high-speed cam. A reset spring is arranged between the external lug boss of the small tappet and the inner lug boss of the big tappet. The plunger of the small tappet is arranged in the hydraulic cavity of the big tappet. The small tappet is contacted and matched with the high-speed cam. The plunger of the big tappet is arranged in the plunger moving track of the cylinder. Two valves are respectively connected with the both ends of the big tappet which is contacted and cooperated with the two low-speed cam. The hydraulic cavity is communicated with the decompression cavity through a hydraulic oil passage in which an electromagnetic valve is arranged. The mechanism has the advantages that the valve phase and the valve lift are changed through respectively using different driving valve tappets in high-speed and low-speed situations so that the high-speed performance and the low-speed performance of the engine are optimized and improved.
Description
Technical field
The utility model belongs to automobile distribution device technical field, is specifically related to a kind of novel changable air valve lift range mechanism.
Technical background
The variable valve timing technology be owing to can effectively improve the outstanding advantage such as power type, Economy and toxic emission of motor under different rotating speeds and load, is subjected to the attention of each big automobile production manufacturer of the world day by day.Countries such as the U.S., Japan, Europe just take to the work of variable valve timing Study on Technology as far back as the eighties.In addition, the develop rapidly of current electronic technology has promoted the variable valve timing technology to think the development of practical stage from conceptual phase.Existing engine product with variable valve timing technology occurs on the market now.The relative rotation of import/exhaust camshaft, drive the import/exhaust camshaft and run well.
Mainly contain two kinds with the immediate technology of the present invention, a kind of adjustable hydraulic tappet that utilized is realized lift range variable, and the key of this technology is the adjustable hydraulic tappet.The working principle of this technology is as follows: when motor when the slow-speed of revolution is turned round, pass through hydraulic pressure, utilize coupling pin that two-part of tappet are separated, at this moment, High speed cam lost efficacy, and Lower speed cam is controlled the running of valve in the middle of utilizing, when motor when running up, can pass through hydraulic pressure, utilize coupling pin that these two-part are tied, control the unlatching of valve by the High speed cam on both sides.Mainly there is following shortcoming in this technology: 1, the adjustable hydraulic tappet is very complicated.2, each valve needs three cams to drive, the camshaft structure complexity, and be unfavorable on many Valves Technology, using.3, the hydraulic control oil duct in the cylinder head is very complicated.
The second kind technology approaching with the present invention is electric-controlled hydraulic tappet formula variable valve actuating mechanism, and this mechanism is when closed electromagnetic valve, and cam promotes first tappet, because the indoor hydraulic oil of tappet can not overflow, oil pressure promotes second tappet, makes valve open or early close evening.This mechanism relatively simple for structure, but speed of response is not high enough, and have the two-stage tappet, make the height of cylinder head and external dimension strengthen.
The above-mentioned shortcoming that the utility model exists at prior art, invent a kind of different cam drive valve tappet that uses respectively by at a high speed with low speed the time, change port timing and valve lift, thereby make the low-speed performance of motor and a kind of novel changable air valve lift range mechanism that high speed performance can both be optimized and improve.
Summary of the invention
The technical solution of the utility model is as follows:
The novel changable air valve lift range mechanism comprises the camshaft of cylinder head, cam, drive cam rotation, by the valve tappet of cam driven or by the valve of tappet control.On camshaft, there are a High speed cam and symmetry to be positioned at two Lower speed cams on High speed cam both sides.Valve tappet has big tappet and little tappet.The outer boss of little tappet and big the interior of tappet are installed Returnning spring along between the boss, and little tappet plunger is positioned at the hydraulic pressure cavity of big tappet, little tappet and High speed cam contact matching.The plunger of big tappet is positioned at the tappet orbit of cylinder head, and big tappet two ends are connected with two valves by valve seat, push rod respectively, big tappet and two Lower speed cam contact matching.Hydraulic pressure cavity is equipped with decompression plunger and spring by the relief chamber in the hydraulic oil channel connection cylinder head in the relief chamber, solenoid valve is installed on the hydraulic oil channel.This mechanism drives same valve tappet with two Lower speed cams and a High speed cam, and when high speed, the closed electromagnetic valve hydraulic channel drives valve tappet by High speed cam; During low speed, solenoid valve is opened hydraulic channel, and High speed cam lost efficacy, and drove valve tappet by two Lower speed cams.Realize that a valve tappet controls the running of two valves simultaneously.
Camshaft and valve tappet have two kinds of setting types, and a kind of is camshaft and large and small tappet parallel configuration, and another kind is an arranged perpendicular.
The advantage of this mechanism is:
1 requirement according to gasoline engine performance optimization, use the driving of High speed cam and Lower speed cam control valve respectively in high, low speed, can reduce the pumping loss of motor, accelerate intake velocity, improve the quality of mixed gas, improve charging efficiency, finally improve engine combustion process, power character, Economy, emission performance etc. all are significantly increased than the conventional gasoline machine.
2, use three cams to control two valves simultaneously and saved the space, help on many Valves Technology, using and arranging
3 adopt the structural type of camshafts and valve tappet arranged perpendicular, for the motor employing VVT technology of the distribution device pattern of Single Over Head Camshaft has found an outlet
4 principles, structure and control system are very simple, feasible.
Description of drawings
Fig. 1 is the structural representation of the variable air valve lift range mechanism that is arranged in parallel of camshaft and valve tappet;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of camshaft and the vertically arranged variable air valve lift range mechanism of valve tappet;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the fundamental diagram of this mechanism when low-speed running;
Fig. 6 is the A-A sectional view of Fig. 5;
Fig. 7 is the fundamental diagram of this mechanism when running up;
Fig. 8 is the A-A sectional view of Fig. 7.
Embodiment
The structure of this mechanism is referring to Fig. 1-4, and this mechanism is made of camshaft 3, High speed cam 2, two Lower speed cam 1a and 1b, little tappet 4, big tappet 5, two valves 10 and cylinder head 8.High speed cam 2 is positioned in the middle of the camshaft 3, with little tappet 4 contact matching.Two Lower speed cam 1a and 1b symmetry are positioned at High speed cam 2 both sides, with big tappet 5 contact matching.Little tappet 4 is arranged in big tappet 5, its outer boss and big tappet interior along Returnning spring 12 is set between the boss.Little tappet plunger 11 is positioned at the hydraulic pressure cavity 6 of big tappet 5.Hydraulic pressure cavity 6 is equipped with decompression plunger 16 and spring 17 by the relief chamber 18 that hydraulic oil channel 7 is communicated with in the cylinder head 8 in the relief chamber 18, solenoid valve 15 is installed on the hydraulic oil channel 7.The two ends of big tappet 5 are symmetrically connected with two valves 10 by valve seat, push rod.Big tappet plunger 13 is positioned at the tappet orbit 14 of cylinder head, and tappet orbit 14 has vent cap 9 to be communicated with atmosphere.
The camshaft 4 and the valve tappet of this mechanism have two kinds of setting types, and a kind of is camshaft 4 and large and small tappet parallel configuration, referring to Fig. 1 and 2; Another kind is an arranged perpendicular, referring to Fig. 3 and 4.
The working principle of this mechanism is as follows:
When motor during at low-speed running, referring to Fig. 5 and 6, solenoid valve 15 is opened, High speed cam 2 promotes little tappet 4 and turns round downwards, hydraulic oil spills into hydraulic oil channel 7 by hydraulic pressure cavity 6, and the plunger 16 that promotes to reduce pressure moves right, oil pressure is less, the power that acts on big tappet 5 bottoms is very little, valve 10 can not be opened, the while, the Lower speed cam 1a on High speed cam 2 both sides and 1b directly drove big tappet 5 along with little tappet 4 moves downward, under the direct driving of Lower speed cam 1a and 1b, valve tappet moves downward and opens valve 10.
When motor when running up, referring to Fig. 7 and 8, solenoid valve 15 cuts out because hydraulic oil can not overflow hydraulic pressure cavity 6 in, under the driving of High speed cam 2, oil pressure becomes greatly and promotes big tappet 5 opens valve 10.
Claims (4)
1. novel changable air valve lift range mechanism, comprise the camshaft of cylinder head, cam, drive cam rotation, by the valve tappet of cam driven with by the valve of tappet control, it is characterized in that on camshaft, having a High speed cam and symmetry to be positioned at two Lower speed cams on High speed cam both sides; Tappet has big tappet and little tappet, between the inner convex platform of the outer lug boss of little tappet and big tappet Returnning spring is installed, and the plunger of little tappet is positioned at the hydraulic pressure cavity of big tappet, little tappet and High speed cam contact matching; Big tappet plunger is positioned at the tappet orbit of cylinder head, and big tappet two ends connect two valves respectively, big tappet and two Lower speed cam contact matching; Hydraulic pressure cavity is by the relief chamber in the hydraulic oil channel connection cylinder head, and relief chamber is equipped with decompression plunger and spring, and solenoid valve is installed on the hydraulic oil channel.
2. novel changable air valve lift range mechanism according to claim 1 is characterized in that the vent cap that is communicated with atmosphere is arranged in the tappet orbit.
3. novel changable air valve lift range mechanism according to claim 1 and 2 is characterized in that camshaft and large and small tappet parallel configuration.
4. novel changable air valve lift range mechanism according to claim 1 and 2 is characterized in that camshaft and large and small tappet arranged perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02222780 CN2546635Y (en) | 2002-05-30 | 2002-05-30 | Variable air door lift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02222780 CN2546635Y (en) | 2002-05-30 | 2002-05-30 | Variable air door lift mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546635Y true CN2546635Y (en) | 2003-04-23 |
Family
ID=33700614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02222780 Expired - Fee Related CN2546635Y (en) | 2002-05-30 | 2002-05-30 | Variable air door lift mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546635Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454552B (en) * | 2006-05-25 | 2011-11-30 | 通用汽车环球科技运作公司 | Internal combustion engine and control method |
| CN102486101A (en) * | 2010-12-06 | 2012-06-06 | 现代自动车株式会社 | Variable valve driving apparatus |
| CN102094692B (en) * | 2009-12-11 | 2013-01-02 | 吴爽 | Stepless variable valve lift mechanism and control method thereof |
| CN101451454B (en) * | 2007-12-06 | 2013-06-19 | 现代自动车株式会社 | Variable valve system |
| CN104121054A (en) * | 2014-06-28 | 2014-10-29 | 范永建 | Piston engine valve timing and variable lift driving system |
| CN104295333B (en) * | 2013-07-16 | 2017-02-22 | 张珊 | Engine valve mechanism |
| WO2018014216A1 (en) * | 2016-07-19 | 2018-01-25 | 乐矣天 | Multifunctional intake/exhaust rocker arm |
-
2002
- 2002-05-30 CN CN 02222780 patent/CN2546635Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454552B (en) * | 2006-05-25 | 2011-11-30 | 通用汽车环球科技运作公司 | Internal combustion engine and control method |
| CN101451454B (en) * | 2007-12-06 | 2013-06-19 | 现代自动车株式会社 | Variable valve system |
| CN102094692B (en) * | 2009-12-11 | 2013-01-02 | 吴爽 | Stepless variable valve lift mechanism and control method thereof |
| CN102486101A (en) * | 2010-12-06 | 2012-06-06 | 现代自动车株式会社 | Variable valve driving apparatus |
| CN104295333B (en) * | 2013-07-16 | 2017-02-22 | 张珊 | Engine valve mechanism |
| CN104121054A (en) * | 2014-06-28 | 2014-10-29 | 范永建 | Piston engine valve timing and variable lift driving system |
| WO2018014216A1 (en) * | 2016-07-19 | 2018-01-25 | 乐矣天 | Multifunctional intake/exhaust rocker arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |