CN1272590A - Hydraulic transmission air valve mechanism - Google Patents
Hydraulic transmission air valve mechanism Download PDFInfo
- Publication number
- CN1272590A CN1272590A CN 99104651 CN99104651A CN1272590A CN 1272590 A CN1272590 A CN 1272590A CN 99104651 CN99104651 CN 99104651 CN 99104651 A CN99104651 A CN 99104651A CN 1272590 A CN1272590 A CN 1272590A
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- Prior art keywords
- cam
- valve
- valve mechanism
- hydraulic transmission
- air valve
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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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- Valve Device For Special Equipments (AREA)
Abstract
The present invention discloses a hydraulic transmission valve mechanism, and is characterized by adopting a hydraulic system to implement the movement transfer between cam and airvalve so as to simplify the structure of engine and raise the performance of engine.
Description
The present invention relates to the distribution device of four stroke engine.
In existing engine valve actuating mechanism, all be to use mechanically operated mode to drive valve.Main mode has: 1, the cam drive tappet of underlying directly or by rocking arm drives valve by tappet again.2, with chain, cingulum, gear drive overhead camshaft, cam directly or by rocking arm drives valve.In the method for underlying cam, because reciprocating part inertia such as tappet are excessive, rigidity is not high, for the very big restriction of reinforcement existence of motor.Overhead camshaft helps starting the reinforcement of motivation, but the structure more complicated, cost is also high, because the above two all are mechanical transmission, the mechanical wear of part will influence the reliability of transmission, simultaneously simultaneously, position between cam and the valve also is subjected to the constraint of driving parts, can not freely arrange.
Purpose of the present invention proposes a kind of new valve kind of drive, in the transmission of cam drive valve, adopts airtight hydraulic system, thereby simplifies the structure of motor, improves the rigidity of distribution device, increases the flexibility ratio of distribution device design.
Hydraulic transmission air valve mechanism of the present invention, comprise cam, camshaft, valve assembly, it is characterized in that the hydraulic system that cam passes through to be made up of master cylinder, main piston, return spring, high-pressure oil pipe, operating cylinder, working piston drives valve, wherein main piston and cam connect, and working piston and valve assembly connect.
Because the incompressibility of liquid, so native system has very high rigidity, structure is simpler than the overhead camshaft type that very high rigidity is arranged equally again simultaneously, again because connect with high-pressure oil pipe between master cylinder and the operating cylinder, so the position between valve and the cam can more freely be arranged.
Be described further below in conjunction with drawings and Examples.
Fig. 1 is embodiment's schematic representation of the single-cylinder engine of simplification.
Fig. 2 is embodiment's schematic representation of the four cylinder engine of simplification.
Figure cam 1 and camshaft 2 are an integral body, and main piston 3 is installed in the master cylinder 5, and are pressed to cam 1 by return spring 4, working piston 8 is connected with valve assembly 9 in operating cylinder 7, be full of hydraulic oil in master cylinder 5, high-pressure oil pipe 6, the operating cylinder 7, the 10th, cylinder head, the 11st, cylinder block.
In Fig. 1, cam is along the rotation of direction shown in the arrow, and when the bent red beginning of the work that has forwarded cam to contacted with main piston, main piston began by jack-up, because the incompressibility of liquid, working piston is pushed, and drives valve opening.When cam work arrived closing flank, main piston is return under the effect of return spring, and valve and working piston be return under the effect of valve spring also, and the return speed of valve still is subjected to the control of cam.
Shown in Figure 2 is the specific embodiment structure diagram of a four cylinder engine, and shown is a valve of each cylinder of four cylinder engine.Each cylinder crankshaft phase difference of present embodiment is 180 degree, and the phase difference on the cam is 90 degree, and shown in the figure is that four master cylinders and piston distribute around cam according to phase difference, just can drive four cylinder valves with a cam like this.
Claims (2)
1, a kind of hydraulic transmission air valve mechanism comprises cam, camshaft, valve assembly, it is characterized in that cam passes through the moving valve of being made up of master cylinder, main piston, return spring, high-pressure oil pipe, operating cylinder, working piston that drives of hydraulic system.
2, hydraulic transmission air valve mechanism according to claim 1 is characterized in that a plurality of main pistons and master cylinder are arranged, to drive the valve on a plurality of cylinders on the out of phase around cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104651 CN1272590A (en) | 1999-05-03 | 1999-05-03 | Hydraulic transmission air valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104651 CN1272590A (en) | 1999-05-03 | 1999-05-03 | Hydraulic transmission air valve mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1272590A true CN1272590A (en) | 2000-11-08 |
Family
ID=5271771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99104651 Pending CN1272590A (en) | 1999-05-03 | 1999-05-03 | Hydraulic transmission air valve mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1272590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436762C (en) * | 2003-12-04 | 2008-11-26 | 马克卡车公司 | System and method for preventing piston-valve collision on a non-freewheeling internal combustion engine |
| CN102606253A (en) * | 2012-04-01 | 2012-07-25 | 五邑大学 | Hydraulic type continuously variable valve device of engine |
| CN104948251A (en) * | 2014-03-31 | 2015-09-30 | 王皓 | Engine valve hydraulic driving and motion allocating device |
-
1999
- 1999-05-03 CN CN 99104651 patent/CN1272590A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436762C (en) * | 2003-12-04 | 2008-11-26 | 马克卡车公司 | System and method for preventing piston-valve collision on a non-freewheeling internal combustion engine |
| CN102606253A (en) * | 2012-04-01 | 2012-07-25 | 五邑大学 | Hydraulic type continuously variable valve device of engine |
| CN104948251A (en) * | 2014-03-31 | 2015-09-30 | 王皓 | Engine valve hydraulic driving and motion allocating device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |