WO2015035855A1

WO2015035855A1 - Continuously variable valve lift actuator

Info

Publication number: WO2015035855A1
Application number: PCT/CN2014/084972
Authority: WO
Inventors: 田丰果; 谢庆生; 王自勤
Original assignee: Tian Fengguo
Priority date: 2013-09-10
Filing date: 2014-08-22
Publication date: 2015-03-19
Also published as: CN104421006A

Abstract

A continuously variable valve lift actuator, a connecting collar (6) being mounted between the actuator body (1) and the cover (9); by means of connecting members, the actuator body (1), the connecting collar (6), and the cover (9) are connected together; a retaining collar (7) is mounted inside the connecting collar (6) and can be driven by an actuating device to adjust the axial position of the retaining collar; a piston component consists of a piston sleeve (2), a piston (3), a retainer rod (5), and a spring (4); the piston sleeve (2) is fixed in the front end bore of the actuator body (1), the piston (3) is mounted in the bore of the piston sleeve (2) and can slide back and forth along the axial direction, the retainer rod (5) is mounted in the bore of the connecting collar (6) and the rear end surface of the retainer rod makes contact with the retaining collar (7), and a spring (4) is sleeved on the retainer rod (5), the front end of the spring being in contact with the rear end surface of the piston (3) and the rear end of the spring being in contact with the stepped surface on the retainer rod (5). The continuously variable valve lift actuator continuously adjusts the lift of the valve, meeting the valve lift demands of the engine under various loads and improving the fuel economy and emissions reduction of the engine.

Description

Valve lift continuous variable regulator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine, and more particularly to a valve lift continuously variable regulator of an engine.

BACKGROUND OF THE INVENTION Engines have different requirements for valve lift under different loads. Adjusting valve lift according to engine operating conditions is one of the important technical means to improve engine power characteristics, improve fuel economy and reduce harmful gas emissions. At present, in the hydraulic variable valve lift technology, the solenoid valve is mainly used to control the hydraulic oil circuit that drives the valve to realize the adjustment of the valve lift. This type of method has a solenoid valve that needs to be configured more, and the structure and control are complicated. Solenoid valve high frequency response performance and other shortcomings.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a valve that can continuously adjust the lift of a valve to meet the requirements of the engine lift under various loads of the engine, and to continuously increase the fuel economy and the emission reduction of the engine. Regulator. The object of the present invention and the main technical problem thereof are achieved by the following technical solutions: A valve lift continuously variable regulator of the present invention comprises a regulator body, a connecting sleeve and a cover plate, wherein: the connecting sleeve is installed at Between the regulator body and the cover plate, the regulator body, the connecting sleeve and the cover plate are integrally connected by a connecting member; the limiting sleeve is installed in the connecting sleeve, and can be driven by the driving device to adjust the axial position thereof; The component is composed of a plunger sleeve, a plunger, a limit 4 dry, and a spring. The plunger sleeve is fixed in the front end hole of the regulator body, and the plunger is installed in the plunger sleeve hole and can slide back and forth along the axial direction, and the limit is dry. It is installed in the hole of the connecting sleeve and the rear end surface is in contact with the limiting sleeve. The spring sleeve is placed on the limit 4 and the front end of the spring is in contact with the rear end surface of the plunger and the rear end of the spring is in contact with the step surface on the stem of the limit 4. The above-mentioned valve lift continuously variable regulator, wherein: the preload force of the spring in the plunger member is greater than the force of the hydraulic pressure on the plunger when the hydraulic system reaches the preload of the valve spring and the valve is opened, the plunger The spring force of the spring when the maximum adjustable stroke is reached is less than the valve spring force corresponding to the oil pressure of the system when the valve reaches the required minimum lift. The above-described valve lift continuously variable regulator, wherein: the plunger member is 2, 3, 4, 6, 8,

12 groups. The above-described valve lift continuously variable adjuster, wherein: the mounting hole of the plunger of the same plunger member on the adjuster body is coaxial with the limit rod mounting hole on the connecting sleeve. The above-described valve lift continuously variable regulator, wherein: the connecting member is a screw. The above-described valve lift continuously variable regulator, wherein: the spring at the rear end of the plunger can also be equivalently replaced by introducing a pressure oil in the rear end cavity of the plunger or introducing a combination of the pressure oil and the spring. The present invention has significant advantages and advantageous effects over the prior art. According to the above technical solution, the present invention adopts volume control, precise control, and adjusts the single cylinder; by increasing or decreasing the number of plunger components and adjusting the arrangement angle, the demand of the engine with different cylinder numbers can be satisfied, and the adaptability is strong; Under the condition that the valve lift adjuster only needs to be adjusted accordingly, the system can realize the lift adjustment of all intake valves and automatically perform adaptive operation, without performing high-frequency and repeated adjustment actions for each cycle of the engine. Good system adaptability and dynamic response characteristics; its structure is simple, the integration is high, and it is easy to integrate with the hydraulic drive system of the engine valve mechanism; the valve lift adjustment range is wide, and it can be continuously adjusted under the full working condition of the engine. Greatly improve and improve the power, economy and emissions of the engine under various working conditions. It can meet the engine valve lift adjustment requirements of different cylinder numbers such as 2-cylinder, 3-cylinder, 6-cylinder, 8-cylinder and 12-cylinder.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the outline of the present invention; FIG. 2 is a schematic view showing the outer shape of FIG. Figure 3 is a schematic view of the structure of the present invention;

1. Regulator body, 2, plunger sleeve, 3, plunger, 4, spring, 5, limit position ^ S, connecting sleeve, 7, limit sleeve, 8, screw, 9, cover

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific embodiments, structures, features and functions of the valve lift continuously variable regulator according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. As shown in Figure 1-3, taking a four-cylinder engine as an example, a valve lift continuously variable regulator includes a regulator body 1, a connecting sleeve 6, and a cover plate 9, wherein: the connecting sleeve 6 is mounted on the regulator body Between the cover plate 9 and the cover plate 9, the adjuster body 1, the connecting sleeve 6, and the cover plate 9 are integrally connected by screws 8; the limit sleeve 7 is installed in the connecting sleeve 6, and can be driven by the driving device to adjust the axial direction thereof. Position; the plunger member is composed of a plunger sleeve 2, a plunger 3, a limiting rod 5, and a spring 4. The plunger sleeve 2 is fixed in the front end hole of the regulator body 1, and the plunger 3 is installed in the hole of the plunger sleeve 2 and It can slide back and forth in the axial direction, the limiting rod 5 is installed in the hole of the connecting sleeve 6 and the rear end surface is in contact with the limiting sleeve 7, the spring 4 is set on the limit 4 dry 5 and the front end of the spring 4 is in contact with the rear end surface of the plunger 3 The rear end of the spring 4 is in contact with the step surface on the limit 4 stem 5. The preload force of the spring 4 in the plunger member is greater than the force of the hydraulic pressure on the plunger when the hydraulic system reaches the valve spring preloading force to overcome the valve spring preloading force, and the spring force of the spring 4 when the plunger reaches the maximum adjustable stroke is smaller than the valve The valve spring force corresponding to the oil pressure of the system when the required minimum lift is reached. The plunger components are in groups of four, each of which is used to adjust the intake stroke of a gas rainbow. The number of plunger component groups can be increased or decreased according to the number of engine cylinders, and the engine valve lift adjustment requirements of different cylinder numbers such as 2 cylinders, 3 cylinders, 6 cylinders, 8 cylinders, and 12 rainbows can be satisfied. The mounting hole of the plunger sleeve 2 of the same plunger member on the regulator body 1 is coaxial with the mounting hole 5 of the limiting rod 5 on the connecting sleeve 6. The spring 4 at the rear end of the plunger 3 can also be equivalently replaced by a pressure oil introduced into the rear end cavity of the plunger 3 or a combination of a pressurized oil and a spring. The working process is as follows: The four plunger sleeve front ports of the valve lift continuously variable regulator are respectively connected with the four sets of hydraulic oil lines that drive the intake valves through hydraulic lines. After the connection is completed, during the engine operation, according to the engine The different requirements for valve lift under different loads, driven by the drive and adjusting the position of the limit sleeve, can adjust the volume of liquid entering the plunger sleeve 2 in each cycle of the engine, thereby controlling the flow of hydraulic oil into the intake. The volume of the door cylinder finally meets the adjustment requirements of the valve lift.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any modification to the above embodiments can be made according to the technical essence of the present invention without departing from the technical scope of the present invention. And equivalent changes and modifications are still within the scope of the technical solution of the present invention.

Claims

Claim

A valve lift continuously variable regulator comprising a regulator body (1), a connecting sleeve (6), a cover plate (9), characterized in that: a connecting sleeve (6) is mounted on the regulator body (1) Between the cover plate (9), the regulator body (1), the connecting sleeve (6) and the cover plate (9) are connected by a connecting piece; the limiting sleeve (7) is installed in the connecting sleeve (6), And can be driven by the driving device to adjust its axial position; the plunger member is composed of a plunger sleeve (2), a plunger (3), a limiting rod (5), a spring (4), and a plunger sleeve

(2) Fixed in the front end hole of the regulator body (1), the plunger (3) is installed in the hole of the plunger sleeve (2) and can slide back and forth in the axial direction, and the limit rod (5) is mounted on the connecting sleeve (6) ) inside and behind the hole and the limit sleeve

(7) Contact, spring (4) is set on the limit rod (5) and the front end of the spring is in contact with the rear end surface of the plunger (3) and the rear end of the spring is in contact with the step surface on the limit rod (5).

2. The valve lift continuously variable adjuster according to claim 1, wherein: the preload force of the spring (4) in the plunger member is greater than when the hydraulic system reaches the preload of the valve spring and the valve is opened. The force of the oil pressure on the plunger (3), the spring force of the spring (4) when the plunger (3) reaches the maximum adjustable stroke is smaller than the valve spring corresponding to the oil pressure of the system when the valve reaches the required minimum lift force.

3. The valve lift continuously variable regulator according to claim 1 or 2, wherein the plunger member is 2, 3, 4, 6, 8, 12 sets.

4. The valve lift continuously variable adjuster according to claim 3, characterized in that: the mounting hole and the connecting sleeve (6) of the plunger sleeve (2) of the same plunger member on the regulator body (1) The upper limit rod (5) mounting hole is coaxial.

5. The valve lift continuously variable adjuster according to claim 4, wherein: the plunger

(3) The spring at the rear end (4) can be replaced by a combination of pressure oil introduced into the rear chamber of the plunger (3) or a combination of pressurized oil and spring.

6. The valve lift continuously variable adjuster according to claim 5, wherein the connecting member is a screw (8).