CN100425805C

CN100425805C - Engine valve driving device

Info

Publication number: CN100425805C
Application number: CNB2006100210876A
Authority: CN
Inventors: 李明; 李丝丽; 蒋鲜蓉
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-02
Filing date: 2006-06-02
Publication date: 2008-10-15
Anticipated expiration: 2026-06-02
Also published as: WO2007104189A1; CN1858409A

Abstract

The present invention discloses an engine valve driving device which comprises a cam shaft, upper rocking arm shafts on both sides of the cam shaft, a cam arranged on the cam shaft, and upper rocking arms arranged on the upper rocking arm shafts. One end of each upper rocking arm is in contact with the cam, and the other end is sheathed on a pushing rod of the valve. The engine valve driving device is characterized in that the driving device also comprises lower rocking arm shafts positioned between the upper rocking arm shafts and a cylinder head, lower rocking arms arranged on the lower rocking arm shafts, and a concave wheel arranged on the cam shaft, wherein one end of each lower rocking arm is in contact with the concave wheel, and the other end is sheathed on the pushing rod of the valve and can freely slide along the pushing rod. Contact surfaces exit between each upper rocking arm and each lower rocking arm. The upper rocking arms and the lower rocking arms make each other rotate in the same direction by interaction through the contact surfaces. The present invention has simple structure and energy saving in use. By the tests of the China measurement technology academy and compared with the engine of the existing valve driving device, the engine valve driving device has the advantages that the economic oil can be saved by more than 30% in 100 kilometers and the maximum speed is increased by more than 10%.

Description

Engine valve actuator

Technical field

The present invention relates to the four stroke engine of automobile-use, a kind of specifically engine valve actuator.

Background technique

Existing motor is made of body, cylinder block, connecting rod, piston, cylinder head, camshaft, rocking arm, valve-chamber cover, spring, intake valve, exhaust valve; Its gas distribution system method of operation is: camshaft drives cam rotation, and the cam drive rocking arm drives valve and opens, and realizes that by spring action valve resets, thereby realizes the keying of valve, finishes supply, the exhaust cycle of motor.Valve all is to close along with returning of spring simply in the high engine speeds operation process, raising along with engine speed, the time that spring promotes the valve folding can change to some extent, and the change of this time is unfavorable for the performance performance of motor, increased oil consumption, and, increased the bigger required power consumption of spring pressure motion that overcomes on intake valve and the exhaust valve because bigger spring pressure has increased the wearing and tearing between cam and rocking handle and each link.And apparatus structure complexity, cost height that the present mechanical drive mode control valve that need not spring reset, utilization opens and closes are not easy to marketing.

Summary of the invention

The objective of the invention is to: at above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, can reduce the engine valve actuator of entire engine energy consumption.

Technological scheme of the present invention is:

A kind of engine valve actuator, include camshaft, upper rocker arm axle in the camshaft both sides, be installed in the cam on the camshaft, and be installed in upper rocker arm on the upper rocker arm axle, upper rocker arm one end contacts with cam, the other end is socketed on the push rod of valve, lower shake-changing arm axle between upper rocker arm axle and cylinder head, and lower shake-changing arm mounted thereto, it is characterized in that: this drive unit also includes recessed wheel that is installed on the camshaft, one end of lower shake-changing arm contacts with recessed the wheel, the other end is socketed on the push rod of valve and can be free to slide along push rod, and one section surface of contact is arranged between upper rocker arm and the lower shake-changing arm, and the two interacts by surface of contact and makes the other side do the rotation of equidirectional.

The invention has the beneficial effects as follows: simple in structure easy to implement, and by structural optimization, make when engine running, to need not to overcome spring force acting bigger on intake valve and the exhaust valve, reduced energy consumption and improved engine speed to a certain extent.Through China Testing Technology Institute's test, to compare 100 kilometers economical consumption of fuel with available engine and can save more than 30%, highest speed improves more than 10%.

Description of drawings

Fig. 1 is to use motor of the present invention to be in the structural representation of aspirating stroke.

Fig. 2 is to use motor of the present invention to be in the structural representation of compression stroke.

Fig. 3 is to use motor of the present invention to be in the structural representation of expansion stroke.

Fig. 4 is to use motor of the present invention to be in the structural representation of exhaust stroke.

Fig. 5 is camshaft of the present invention and assembling cam, recessed schematic representation of taking turns thereon.

Fig. 6 is camshaft of the present invention and assembling recessed schematic representation of taking turns thereon.

Wherein, reference character: 1 is piston, and 2 is cylinder, and 3 is cylinder head, 4 is relief opening, and 5 is exhaust valve, and 6 is lower shake-changing arm, and 7 is the lower shake-changing arm axle, 8 is valve actuating push rod, and 9 is the upper rocker arm axle, and 10 is upper rocker arm, and 11 is cam, 12 are recessed the wheel, and 13 is camshaft, and 14 is boss, 15 is spring, and 16 is deck, and 17 is suction port, 18 is surface of contact, and 19 is oilhole, and 20 is intake valve.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

Specific embodiments of the invention, as shown in Figure 1, a kind of engine valve actuator is installed on the cylinder head 3 of motor, includes camshaft 13, upper rocker arm axle 9 in camshaft 13 both sides, be installed in the cam 11 on the camshaft 13, and be installed in the upper rocker arm 10 of upper rocker arm axle 9, upper rocker arm 10 1 ends contact with cam 11, the other end is socketed on the push rod 8 of valve, and cam 11, camshaft 13 are provided with the oilhole 19 that lubricant oil is used; And available engine valve actuator difference is: this drive unit also includes the lower shake-changing arm axle 7 between upper rocker arm axle 9 and cylinder head 3, and lower shake-changing arm 6 mounted thereto, be installed in recessed on the camshaft 13 and take turns 12, one end of lower shake-changing arm 6 is taken turns 12 and is contacted with recessed, the other end is socketed on the push rod 8 of valve and can be free to slide along push rod 8, one section surface of contact 18 is arranged between upper rocker arm 10 and the lower shake-changing arm 6, and the two interacts by surface of contact 18 and makes the other side do the rotation of equidirectional.Cam 11, recessed take turns 12 and camshaft 13 and the assembling as shown in Figure 5 and Figure 6.

Another specific embodiment of the present invention, on embodiment one basis, on valve actuating push rod 8, on the position between the last lower shake-changing arm 6, be fixed with boss 14, the part that lower shake-changing arm 6 is socketed on the push rod 8 is provided with deck 16, is provided with spring 15 between boss 14 and deck 16.When closing valve, lower shake-changing arm 6 is taken turns 12 and drive to be rotated by recessed, and pass through surface of contact 18 promotion upper rocker arms 10 and rotate in the same way, lower shake-changing arm 6 promotes to move on the push rod 8 by spring 15 and boss 14 simultaneously, valve is contacted with cylinder head 3 inwalls, avoided directly driving causing valve and cylinder head 3 inwalls fiercely to collide when valve is closed in push rod 8 motions, prolonged the life-span of device by upper rocker arm 10.

Operating conditions of the present invention, as shown in Figures 1 to 4: in suction stroke, piston 1 is descending, cam 11 promotes right-hand member upper rocker arm 10 clockwise directions rotation, driving push rod 8 opens intake valve 20 downwards, gas enters cylinder 2 by suction port 17, and simultaneously upper rocker arm 10 promotes right-hand member lower shake-changing arms 6 clockwise directions rotation by surface of contact 18 and is adjacent to and recessedly takes turns 12, as shown in Figure 1; In compression stroke, piston 1 is up, and the recessed 12 promotion right-hand member lower shake-changing arms 6 of taking turns are counterclockwise to rotation, and lower shake-changing arm 6 promotes upper rocker arms 10 by surface of contact 18 and rotates in the same way, and upper rocker arm 10 drives on the push rods 8 and moves, and intake valve 20 is closed, as shown in Figure 2; At expansion stroke, piston 1 is descending, and camshaft 13 continues to rotate, and upper rocker arm 10, lower shake-changing arm 6 and protruding, recessed circumferential contact of taking turns on 12 do not rotate, and intake valve 20 and exhaust valve 5 are all closed, as shown in Figure 3; In exhaust stroke, piston 1 is up, cam 11 promotes left end upper rocker arm 10 and counterclockwise rotates, driving push rod 8 opens exhaust valve 5 downwards, gas is discharged cylinder 2 by relief opening 4, simultaneously upper rocker arm 10 promotes left end lower shake-changing arms 6 clockwise directions rotation by surface of contact 18 and is adjacent to and recessedly takes turns 12, as shown in Figure 4, after exhaust is finished, recessedly take turns 12 and promote left end lower shake-changing arms 6 clockwise directions rotation, lower shake-changing arm 6 promotes upper rocker arms 10 by surface of contact 18 and rotate in the same way, moves on the upper rocker arm 10 drive push rods 8, exhaust valve 5 cuts out, and enters next circulation.

Claims

1. engine valve actuator, include camshaft (13), upper rocker arm axle (9) in camshaft (13) both sides, be installed in the cam (11) on the camshaft (13), and be installed in upper rocker arm (10) on the upper rocker arm axle (9), upper rocker arm (10) one ends contact with cam (11), the other end is socketed on the push rod (8) of valve, be positioned at the lower shake-changing arm axle (7) between upper rocker arm axle (9) and the cylinder head (3), and lower shake-changing arm (6) mounted thereto, it is characterized in that: this drive unit also includes recessed wheel the (12) that is installed on the camshaft (13), one end of lower shake-changing arm (6) contacts with recessed wheel the (12), the other end is socketed on the push rod (8) of valve and can be free to slide along push rod (8), between upper rocker arm (10) and the lower shake-changing arm (6) one section surface of contact (18) is arranged, the two interacts by surface of contact (18) and makes the other side do the rotation of equidirectional.

2. according to the described engine valve actuator of claim 1, it is characterized in that, on valve actuating push rod (8), on the position between the upper and lower rocking arm, be fixed with boss (14), the part that lower shake-changing arm (6) is socketed on the push rod (8) is provided with deck (16), is provided with spring (15) between boss (14) and deck (16).