CN101349177A

CN101349177A - Variable air valve apparatus of engine

Info

Publication number: CN101349177A
Application number: CNA2008100300674A
Authority: CN
Inventors: 冯子光
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-08
Filing date: 2008-08-08
Publication date: 2009-01-21
Anticipated expiration: 2028-08-08
Also published as: CN100572764C

Abstract

The invention discloses a variable valve device for engines, comprising a valve sleeved with a valve spring, a rocker arm driving the valve to do reciprocating motion, as well as a rotary cam driving the rocker arm to swing. The rocker arm comprises a rocker arm body in contact with a low cam; a transverse groove is arranged in the rocker arm body; a piston pin sheet with a through hole and a return spring are placed in the transverse groove; an opening of the transverse groove is provided with a spring seat in contact with the return spring; a longitudinal groove is arranged above the transverse groove; a contact block in contact with a high cam is placed in the longitudinal groove; a press block is fixed on the bottom of the contact block; a T-shaped rod is threaded on the press block; the press block and the T-shaped rod can be positioned in the through hole of the piston pin sheet; and a spring pressing against the T-shaped rod is arranged inside the contact block. The variable valve device for internal combustion engines has the greatest characteristics that the product is reasonable in structure, capable of independently controlling the timing-lift changes of each valve, good in structural rigidity, high in durability and low in failure rate as well as manufacturing cost.

Description

A kind of variable valve gear of motor

Technical field

The present invention relates to a kind of air gate distribution device of internal-combustion engine, particularly relate to a kind of variable valve gear of motor.

Background technique

Motor advances, opening of exhaust valve, close very big with the size of opening path constantly to performance impact, the tradition valve actuating mechanism is generally the mechanical type distribution device, because current changeable air valve technology open or that using generally all exists the energy consumption of distribution device itself excessive, extra parts friction is big, the wearing and tearing of parts are big, particularly very most of nothing is given the lift range variable technology, the intermediate member of transmission is too much too complicated in the mechanism, the motional inertia and the movement inertia height of distribution device moving element when causing the motor operation, the manufacture cost height, serviceability is low, drawbacks such as fault is more, and the actual change amount and the excursion of very most changeable air valve technology are little, far can not satisfy motor variable requirement to distribution device in real work.

Summary of the invention

In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of simple in structure, the engine variable-valve device that air gate distribution is good.

The present invention solves the technological scheme that its problem adopts:

A kind of variable valve gear of motor, comprise the valve that is set with valve spring, drive the reciprocating rocking arm of valve, and the rotating cam that drives the rocking arm swing, described rotating cam is with the wide camshaft of the two-wheel of physa, its middle part is high cam, the left and right sides is low cam, described rocking arm comprises and hangs down the contacted rocker body of cam, be provided with transverse groove in the described rocker body, be placed with the wrist pin sheet and the return spring of band through hole in the transverse groove, the opening of transverse groove is provided with and the contacted spring seat of return spring, and described transverse groove top is provided with cannelure, be placed with in the cannelure and the contacted contact block of high cam, the contact block bottom is installed with briquetting, is coated with T type bar on the briquetting, and briquetting and T type bar can be positioned at the through hole of wrist pin sheet, be provided with the spring of roof pressure on T type bar in the contact block, described rocker body is provided with the oil duct that communicates with transverse groove, and oil duct is connected with hydraulic oil channel on the pitman arm shaft, and hydraulic oil channel is provided with solenoid valve;

As further improvement in the technical proposal, described wrist pin sheet is provided with the groove that communicates with oil duct.

The invention has the beneficial effects as follows: this product has deft design, in light weight, volume is little, movement inertia is little, be fit to the requirement that runs up of motor, and the structure of this independent variable rocker arrangement is very reasonable, timing and the lift that can control each valve separately change, structural rigidity is strong, the serviceability height, rate of fault is low, manufacturing with low cost.In addition, this product is easy to reach the multistage variable valve with the simplest direct method, thereby reach the performance of improving motor advancing, arrange together installation on the door, making it reach the powerful purpose of energy-saving and environmental protection power, is the greatest feature of this variable valve gear.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of invention;

Fig. 2 is the A-A cut-away view of Fig. 1;

Fig. 3 is that the C of Fig. 2 is to schematic representation;

Fig. 4 is the B-B cut-away view of Fig. 1;

Fig. 5 is the motion state schematic representation of Fig. 1;

Fig. 6 is the motion state schematic representation of Fig. 2;

Fig. 7 is the motion state schematic representation of Fig. 4;

Fig. 8 is the view that the wrist pin sheet of invention moves upward;

Fig. 9 is the view that the contact block of invention moves upward.

Embodiment

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of variable valve gear of motor, comprise the valve 1 that is set with valve spring 2, drive the reciprocating rocking arm 3 of valve 1, and the rotating cam 4 that drives rocking arm 3 swings, valve spring 2 makes motor valve when compression stroke and expansion space stroke be in closed condition; Described rotating cam 4 is that its middle part is high cam 41 with the wide camshaft of the two-wheel of physa, and the left and right sides is low cam 42.

Described rocking arm 3 comprises and the contacted rocker body 5 of low cam, be provided with transverse groove 51 in the described rocker body 5, be placed with the wrist pin sheet 6 and the return spring 71 of band through hole 61 in the transverse groove 51, the opening of transverse groove 51 is provided with and return spring 71 contacted spring seats 7, described transverse groove 51 tops are provided with cannelure 52, be placed with in the cannelure 52 and high cam 41 contacted contact blocks 8, contact block 8 bottoms are installed with briquetting 81, briquetting 81 can adopt screw thread or Type of Welding to be connected with contact block 8, be coated with T type bar 82 on the briquetting 81, briquetting 81 and pass the through hole 61 that its inner T type bar 82 can be positioned at wrist pin sheet 6, be provided with the spring 9 of roof pressure on T type bar 82 in the contact block 8, described rocker body 3 is provided with the oil duct 53 that communicates with transverse groove 51, oil duct 53 is connected with hydraulic oil channel on the pitman arm shaft, and hydraulic oil channel is provided with the solenoid valve of may command hydraulic fluid pressure.

This product is in order to make hydraulic oil under the control of solenoid valve wrist pin sheet 6 to be promoted forward, and described wrist pin sheet 6 is provided with the groove 62 that communicates with oil duct 53.

Working principle of the present invention is: with reference to Fig. 5, Fig. 6, Fig. 7, when motor is worked with lower-speed state, contact with rocking arm 3 with the low cam 42 in the left and right sides of the wide camshaft of the two-wheel of physa, at this moment regulate the solenoid valve of hydraulic fluid pressure owing to be in open mode, oil pressure is in low-pressure state, so though high cam 41 is in contact with one another with contact block 8, but its driving spring 9 is in empty moving state, rocking arm 3 is not applied power, at this moment the lift of valve and the lower-speed state of a timing apply engine.

With reference to Fig. 8, Fig. 9, when motor is worked with fast state, the electromagnetic valve hydraulic fluid pressure is in high pressure conditions, make wrist pin sheet 6 overcome the pressure of return spring 61 toward the motion of spring seat 21 directions, thereby enter the bottom of contact block 8, the briquetting 81 that withstands on the contact block 8 can not move downward, because its area of contact each other is big, makes in the motion more reasonable durable.At this moment, high cam 41 with the wide camshaft of the two-wheel of physa middle part contacts with contact block 8, thereby promoting rocking arm 3 moves, the lift of this valve and timing are applicable to the fast state of motor by high cam control, this product has only the same physa when the wide camshaft of two-wheel to contact with rocking arm 3, just can reach and carry out the purpose that surface of contact switches.

When motor is returned to lower-speed state, solenoid valve lowers hydraulic fluid pressure, at this moment, wrist pin sheet 6 is got back to the origin-location under the pressure of return spring 61, and under the elastic force of spring 9, make contact block 8 get back to original position, thereby make the lift of valve and the lower-speed state that timing is returned to motor by T type bar 82.

This product has deft design, and is in light weight, volume is little, and movement inertia is little, be fit to the requirement that runs up of motor, and the structure of this independent variable rocker arrangement is very reasonable, and structural rigidity is strong, the serviceability height, and rate of fault is low, manufacturing with low cost.Be easy to advancing, arranging together installation on the door.Because each variable rocker-arm device is independently to control a valve, four-valve engine according to routine calculates, only change the unlatching lift of a valve next time and open under the situation of duration in the cooperation of control system, the inlet and outlet door of motor will respectively have 3 levels else to open the variation of lift and duration so, the inlet and outlet door is added up and is had 5 other variations of level with regard to one, satisfied the variable requirement of motor to distribution device fully, the potential of motor is fully played under the cooperation of distribution device.Reaching the multistage variable valve with the simplest direct method, thereby reach the performance of improving motor, make it reach the powerful purpose of energy-saving and environmental protection power, is the greatest feature of this variable valve gear.

The design makes the overall dimensions of product further dwindle, thereby makes rocking arm weight saving, but structural rigidity strengthens on the contrary, and this device is more reasonable at the volley durable.

Claims

1. the variable valve gear of a motor, comprise the valve (1) that is set with valve spring (2), drive the reciprocating rocking arm (3) of valve (1), and the rotating cam (4) that drives rocking arm (3) swing, described rotating cam (4) is with the wide camshaft of the two-wheel of physa, its middle part is high cam (41), the left and right sides is low cam (42), it is characterized in that: described rocking arm (3) comprises and the contacted rocker body of low cam (5), be provided with transverse groove (51) in the described rocker body (5), be placed with the wrist pin sheet (6) and the return spring (71) of band through hole (61) in the transverse groove (51), the opening of transverse groove (51) is provided with and the contacted spring seat of return spring (71) (7), described transverse groove (51) top is provided with cannelure (52), be placed with in the cannelure (52) and the contacted contact block of high cam (41) (8), contact block (8) bottom is installed with briquetting (81), be coated with T type bar (82) on the briquetting (81), briquetting (81) and T type bar (82) can be positioned at the through hole (61) of wrist pin sheet (6), be provided with the spring (9) of roof pressure on T type bar (82) in the contact block (8), described rocker body (3) is provided with the oil duct (53) that communicates with transverse groove (51), oil duct (53) is connected with hydraulic oil channel on the pitman arm shaft, and hydraulic oil channel is provided with solenoid valve.

2. the variable valve gear of a kind of motor according to claim 1, it is characterized in that: described wrist pin sheet (6) is provided with the groove (62) that communicates with oil duct (53).