CN2229519Y

CN2229519Y - Hydraulic valve adapted for controlling air intake shutoff angle

Info

Publication number: CN2229519Y
Application number: CN 95221634
Authority: CN
Inventors: 党德功; 郝占明; 荣波
Original assignee: BEINEI GROUP GENERAL Co
Current assignee: BEINEI GROUP GENERAL Co
Priority date: 1995-09-15
Filing date: 1995-09-15
Publication date: 1996-06-19
Anticipated expiration: 2005-09-15

Abstract

The utility model discloses a hydraulic valve for controlling the closing angle of an inlet valve, which is used in the variable air distributing mechanism of an internal combustion engine. The utility model is arranged between a push rod of the air distribution mechanism and a cam of the air distribution mechanism, and the utility model is provided with a tappet. A valve body of the hydraulic valve is divided into an upper oil cavity and a lower oil cavity; the upper oil cavity and the lower oil cavity are provided with check valves, throttling holes and bypass holes for connecting and controlling the operating states of the upper and the lower oil cavities. On the rise section of the cam, the valve lift is determined by a cam molded line; on the lowering section of the cam, the lowering speed of the valve and valve lift can be adjusted to enable the engine to improve gassing factors within the whole rotary speed range. The economic performance of the power is improved, the power and the torque of the utility model can be improved by 5-7%, and the operating stability with a low load and the discharge are improved.

Description

The hydrovalve at control IC Intake Valve Closes angle

The utility model relates to a kind of hydrovalve that is used for internal-combustion engine variable distribution device control IC Intake Valve Closes angle.

At present, most of internal-combustion engines adopt traditional fixed distribution device, thereby can not take into account the needs of high engine speeds and low speed, restricted the dynamic economics of internal-combustion engine, in order to improve the power character of motor, air oil vapour mixed gas into as much as possible is filled in requirement in all rotating speed lower cylinders, should be littler at low speed inlet and outlet delivery angle; And should be more greatly in high speed, this just requires, and air valve is early opened, late closing, different rotating speeds is different to the requirement of distribution device, four valves (or the many valves) motor of external development and Application generally adopts twin cam shaft to satisfy requirement and the control of high, low speed to valve lift and port timing, and for two air valve engines of domestic production, the shared camshaft of inlet and outlet valve, port timing is given control respectively than difficulty, so a kind of suitable variable valve actuating mechanism of research and design is the problem that we need solve.

It is a kind of hydrovalve that is used for internal-combustion engine variable distribution device control IC Intake Valve Closes angle of design that this reality has novel task, it can realize changing air valve rate of descent, lifting curve easily, motor volumetric efficiency in whole speed range is improved, and improve combustion engine powered, economic combination property.

For solving above-mentioned task, the utility model adopts following technological scheme:

To the push rod that is installed in distribution device on the internal-combustion engine and the hydrovalve between cam, contain tappet, its valve body is divided into, lower oil cavitie (A, B), be provided with an one-way valve on the dividing plate of fuel feeding road at last lower oil cavitie being provided with on the B chamber, a throttle orifice and a by-pass hole connect in the control, the working state of lower oil cavitie, on in the valve body, lower oil cavitie is full of pressure oil by the fuel feeding road, during work in the cam ascent stage, being about to cavity of resorption oil on the tappet is pressed into epicoele via one-way valve, output piston is risen, valve opening, be to change the valve journey curve ascent stage by cam profile, at cam descending branch closed check valve, push rod promotes descent of piston under the effect of valve spring power, epicoele oil flows into cavity of resorption via throttle orifice, throttle orifice can rotate control valve by controlling rod and change actual internal area, thereby can change the speed that epicoele oil flows into the speed change descent of piston of cavity of resorption, and then reach the purpose that the valve-closing angle changes, set up by-pass hole to accelerate descent of piston speed, by-pass hole is obstructed when the cam descending branch begins, epicoele oil can only flow into cavity of resorption by throttle orifice, therefore can transfer throttle orifice very little, make descent of piston speed very slow, thereby make valve be in the time lengthening of big aperture, descend one section very behind the small distance at piston, by-pass hole is opened, on, passage is unimpeded between lower oil cavitie, piston just descends rapidly, accelerate valve-closing speed, whole piece valve lift curve fullness coefficient is improved, soon contact at tappet with cam, be valve fall before disseating very little apart from the time, by-pass hole is closed, this moment, epicoele oil can only flow into cavity of resorption from throttle orifice again, flow resistance sharply increases, valve spring power is reducing again, thereby cause velocity of piston to descend rapidly, drop on reposefully with low speed very at last and realize the later stage buffering on the cam generating circle, make the hydrovalve structure satisfy the needs at control IC Intake Valve Closes angle.

Because the utility model adopts technique scheme, hydrovalve has reasonably designed one-way valve, throttle orifice and by-pass hole connect the working state of the upper and lower oil pocket of control, simple in structure, be easy to make to install, can realize the change of the position of IC engine gas distribution phase easily, control IC Intake Valve Closes angle reaches improves volumetric efficiency and calculates by Computer Simulation Optimization and show, selected BN492QE type petrol engine, power, moment of torsion can improve 5-7% and reach expection control purpose.

Further specify below in conjunction with drawings and Examples, accompanying drawing 1 is the utility model--the hydrovalve structure sectional view at-control IC Intake Valve Closes angle, a kind of as seen from Figure 1 hydraulic line at IC Intake Valve Closes angle of controlling is by valve body (2), controlling rod (3), throttle orifice (4), control valve (5), fuel feeding road (6), output piston (8), Leak hole (11) is formed, this is a kind of Overhead valve of embodiment, the BN492QE type petrol engine (ZL94206401.1) of lower arranging cam axle is gone up the hydrovalve at control IC Intake Valve Closes angle, be installed between the push rod (1) and cam (12) of I. C engine distribution mechanism, contain tappet (7), its valve body (2) is divided into, following two oil pocket (A, B), be full of pressure oil via fuel feeding road (6), be provided with an one-way valve (10), a throttle orifice (4), be connected in the control with a by-pass hole (9), lower oil cavitie (A, B) working state, throttle orifice (4) is provided with controlling rod (3) and control valve (5), throttle orifice can rotate control valve (5) by controlling rod (3) and change actual internal area, can change output piston (8) downstream rate, at output piston (8) descending one section very behind the small distance, in the connection, lower oil cavitie (A, B) being provided with by-pass hole (9) is opened by tappet (7), make, lower oil cavitie (A, B) passage is unimpeded between, oil flow resistance reduces, output piston (8) descends rapidly, quicken valve-closing speed, be about to before cam (12) contacts at tappet (7), by-pass hole (9) is closed, oil flow resistance is increased suddenly, drop on reposefully on cam (12) basic circle with low speed at last, by appropriate design hydrovalve control IC Intake Valve Closes angle volumetric efficiency in the whole speed range of motor is improved, dynamic economics effectively improves, and the result to the Performance Calculation of Embodiment B N492QE type petrol engine under hydrovalve control during with original distribution device parameter contrasts as following table:

By above analog computation, can improve the dynamic economics of motor as can be known by hydrovalve control IC Intake Valve Closes angle, paper load operation stability and discharging are improved.

Claims

1, a kind of hydrovalve of controlling the IC Intake Valve Closes angle is made up of valve body, control valve, fuel feeding road, output piston, Leak hole etc., it is characterized in that: be installed in the push rod (1) of I. C engine distribution mechanism and the hydrovalve between the cam (12), contain tappet (7), its valve body (2) is divided into upper and lower oil pocket (A, B) and even is provided with fuel feeding road (6) is provided with at least one one-way valve (10), a throttle orifice (4) and a by-pass hole (9) the connection upper and lower oil pocket of control (A, B) on the dividing plate of last lower oil cavitie working state in the B chamber.

2, hydrovalve according to claim 1 is characterized in that: throttle orifice (4) is provided with controlling rod (3) and control valve (5).

3, hydrovalve according to claim 2 is characterized in that: connect upper and lower oil pocket (A, B) and be provided with by-pass hole (9).