CN105673120A - Continuously variable valve stroke mechanism - Google Patents
Continuously variable valve stroke mechanism Download PDFInfo
- Publication number
- CN105673120A CN105673120A CN201410671532.8A CN201410671532A CN105673120A CN 105673120 A CN105673120 A CN 105673120A CN 201410671532 A CN201410671532 A CN 201410671532A CN 105673120 A CN105673120 A CN 105673120A
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- arm
- valve
- fixed
- driving device
- swing arm
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Abstract
The invention discloses a continuously variable valve stroke mechanism. The continuously variable valve stroke mechanism comprises a variable-length swing arm, a fixed-length swing arm and a driving device. The variable-length swing arm is composed of a guide arm and a sliding arm, wherein one end of the guide arm is fixed to a cylinder cover through a rotary pivot, and the other end of the guide arm is driven by an air distribution cam; the sliding arm is assembled in the guide arm and limited by the driving device, a reset spring and a sliding rail in the guide arm and slides in the one-dimension direction along with movement of the driving device. One end of the fixed-length swing arm is limited in the cylinder cover fixing position in the mode of a rotary pair, a protruding part of the bottom of the other end of the fixed-length swing arm drives at least one air valve-spring assembly, and the top plane of the fixed-length swing arm is a contact plane pair of the sliding arm. The continuous variable valve stroke mechanism is simple in structure. The valve stroke can be controlled through different work conditions of an engine, energy consumption is reduced, the economy of fuel oil is optimized, and the continuously variable valve stroke mechanism can be used in cooperation with a VVT assembly with variable air inlet and exhausting phases, and the opening and closing time of a valve and a two-dimensional variable of the valve opening and closing stroke are continuously adjustable.
Description
Technical field
The invention belongs to technical field of internal combustion engines, particularly relate to a kind of engine continuous variable valve stroke mechanism, it is adaptable to arbitrarily pattern is with the in-cylinder combustion electromotor of cam valve train, however it is not limited to car combustion engine field category.
Background technology
The Valves Technology of route-variable for promoting the power of each part throttle characteristics of automobile engine, economy there is prominent effect, traditional engine valve stroke be subject to the restriction of cam-shaped line, it is fixing uncontrollable, particularity due to car combustion engine operating mode, its rotating speed and power load distributing scope are widely, in view of the many-sided comprehensive complicated operating mode of road conditions, vehicle load and driving habits, air inlet and the aerofluxus demand of car combustion engine correspondence operating mode have larger difference; Such as: when idling, running on the lower load, air inlet and aerofluxus only need less stroke can meet operational requirements, unnecessary open amount is unnecessary, and the energy acting consuming internal combustion engine certain promotes it to open and close, and vehicle economy so can be made to be deteriorated; Under moderate load situations, need certain EGR rate to reduce oil consumption, but the distribution mode of fixed journey system cannot realize exhaust gas inside cylinder to be retained, need internal combustion engine configurations EGR external circulating system or aerofluxus VVT to realize, thus can increase electromotor cost, and piston-cylinder can be caused damage by the waste gas water condensation after cooling, improve EGR rate in aerofluxus VVT mode, there is again the deleterious situation of pumping loss merit; Under high load working condition, needing bigger valve opening amount, to obtain bigger charge flow rate, traditional car combustion engine cannot take into account this operating mode, exhauxt valve opens amount deficiency can cause the defect that in cylinder, scavenging is insufficient, and in cylinder, the waste gas of remaining will make power performance be deteriorated.
Summary of the invention
It is an object of the invention to provide a kind of continuous variable valve Strok mechanism.
The purpose of the present invention is achieved through the following technical solutions: a kind of continuous variable valve Strok mechanism, including elongated rocking arm, fixed length rocking arm and driving device, described elongated rocking arm is made up of leading arm and travelling arm, one end of leading arm is fixed on cylinder cap by rotation pivot, and the other end is driven by valve cam;Described travelling arm is assemblied in leading arm, and the slide rail being driven in device, back-moving spring and leading arm retrains jointly, follows the motion of driving device at one-dimensional square upward sliding; Described fixed length one end is constrained on cylinder cap fixed position in revolute pair mode, and bottom the other end, projection drives at least one valve-spring assembly, and the contact plane that top planes is travelling arm of described fixed length rocking arm is secondary.
As a kind of prioritization scheme, described driving device is that actuated by cams or Electromagnetic Drive or hydraulic-driven or many bars drive.
As the preferred scheme of one, inventive drive means selects adjustment cam to drive.
For the distribution mode of the traditional fixed journey system formula mentioned relative to background material, technical scheme solves drawbacks described above or deficiency targetedly; When small load condition, the power of electromotor output itself is also weak, air inlet and aerofluxus only need less stroke can meet operational requirements, control system can be made travelling arm stroke adjustment to valve stroke minimum position, laborsaving end in lever principle works, and has taken into account valve minimum stroke and has economized the double effects of merit most; In moderate duty and substantial amounts of excessive operating mode, technical scheme can realize increasingly complex control strategy, to take into account dynamic property and economy, when exhaust valve is subject to the mechanism controls of the present invention, when doing work the end of a period stage, exhaust valve only needs to open less stroke, retaining of a part of waste gas in cylinder can be realized, this is equivalent with EGR strategy, but without the outer EGR blood circulation of additional configuration cylinder or exhaust WT mechanism, cost and possible failure mode can't be increased, and fuel consumption and emission is also better optimized; Under high load working condition, when needing bigger blender waste gas exchange rate, air inlet and exhaust valve will work in range mode, effectively promote the charge of incoming mixture and reduce the surplus of cylinder interior remaining waste gas, make engine power, moment of torsion be able to maximum output.
The variable VVT assembly of the air inlet additionally, the mechanism of the present invention can arrange in pairs or groups, exhaust phase uses, it is possible to achieve valve opening/closing time and valve opening and closing stroke two dimension variable continuously adjustabe.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described.
As it is shown in figure 1, continuous variable valve Strok mechanism, including elongated rocking arm, fixed length rocking arm and driving device, elongated rocking arm is made up of leading arm 2 and travelling arm 6, and one end of leading arm 2 is fixed on cylinder cap by rotation pivot 4, and the other end is driven by valve cam 1; Travelling arm 6 is assemblied in leading arm 2, and the slide rail being driven in device, back-moving spring 5 and leading arm 2 retrains jointly, follows the motion of driving device at one-dimensional square upward sliding; Described fixed length rocking arm 7 one end is constrained on cylinder cap fixed position in revolute pair mode, and bottom the other end, projection drives at least one valve-spring assembly 8, and the contact plane that the top planes of fixed length rocking arm 7 is travelling arm 6 is secondary. Driving device is that actuated by cams or Electromagnetic Drive or hydraulic-driven or many bars drive.
The present invention selects adjustment cam-back-moving spring type of drive as specific embodiment for illustrating, but the Sliding Control mode of the travelling arm 6 of the present invention is not limited in this kind of control mode, also comprise other control modes in order to realize travelling arm 6 slip and reset function.
In specific works, leading arm 2 one end is retrained by cylinder body base portion, and the other end is driven by valve cam 1, and travelling arm 6 one end drives fixed length rocking arm 7, and the modulated cam 3 of the other end drives the adjustment realizing length;Adjustment cam 3 can be driven by any-mode, when adjustment cam 3 lifting movement from low to high, the travelling arm 6 of elongated rocking arm removes to prolonging direction according to adjustment cam 3 molded line, travelling arm 6 is subject to the constraint of back-moving spring 5 simultaneously, movement has and determines controlled position, travelling arm 6 is also affected by the guiding of leading arm 2 internal chute and the effect of power transmission simultaneously, slides in one-dimensional direction.
The base portion of elongated rocking arm is fixed on cylinder cap by rotation pivot 4, additionally, arrange according to space, adjustment cam 3 can share rotation pivot 4 with elongated rocking arm or set up respectively; The leading arm 2 of elongated rocking arm is driven by valve cam 1, in order to reduce the friction that valve cam 1 axle is in operation, accompanying drawing of the present invention adopts and on leading arm 2, is provided with a prominent roller contacts power transmission with valve cam 1, but being not restricted to valve cam roller mode power transmission, other any form of mode of transfer force are all suitable in the present invention.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; what above-described embodiment and description described simply illustrates principles of the invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements both fall within the claimed scope of the invention, and claimed scope is defined by appending claims and equivalent thereof.
Claims (2)
1. a continuous variable valve Strok mechanism, it is characterized in that: include elongated rocking arm, fixed length rocking arm and driving device, described elongated rocking arm is made up of leading arm and travelling arm, and one end of leading arm is fixed on cylinder cap by rotation pivot, and the other end is driven by valve cam; Described travelling arm is assemblied in leading arm, and the slide rail being driven in device, back-moving spring and leading arm retrains jointly, follows the motion of driving device at one-dimensional square upward sliding; Described fixed length one end is constrained on cylinder cap fixed position in revolute pair mode, and bottom the other end, projection drives at least one valve-spring assembly, and the contact plane that top planes is travelling arm of described fixed length rocking arm is secondary.
2. continuous variable valve Strok mechanism according to claim 1, it is characterised in that: described driving device is that actuated by cams or Electromagnetic Drive or hydraulic-driven or many bars drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410671532.8A CN105673120A (en) | 2014-11-21 | 2014-11-21 | Continuously variable valve stroke mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410671532.8A CN105673120A (en) | 2014-11-21 | 2014-11-21 | Continuously variable valve stroke mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105673120A true CN105673120A (en) | 2016-06-15 |
Family
ID=56957494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410671532.8A Pending CN105673120A (en) | 2014-11-21 | 2014-11-21 | Continuously variable valve stroke mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN105673120A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110015274A (en) * | 2019-04-30 | 2019-07-16 | 盐城工业职业技术学院 | A kind of sand ground, muddy section automobile-used anti-sideslip deceleration device |
| CN110159387A (en) * | 2019-06-28 | 2019-08-23 | 广汽三菱汽车有限公司 | Crank rocker variable air valve lift apparatus |
| CN110173320A (en) * | 2019-06-28 | 2019-08-27 | 广汽三菱汽车有限公司 | The valve lift apparatus that valve stroke and valve opening time can be changed simultaneously |
| CN114412606A (en) * | 2022-01-14 | 2022-04-29 | 吉林大学 | Linear electric motor driven continuous variable valve mechanism |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2951361A1 (en) * | 1979-12-20 | 1981-07-02 | Bayerische Motoren Werke AG, 8000 München | Variable-lift IC engine valve actuating gear - has two facing lever arms in actuating train, one with effective length variable |
| US4414931A (en) * | 1981-10-13 | 1983-11-15 | Investment Rarities, Incorporated | Variable valve operating mechanism for internal combustion engines |
| JPS5951117A (en) * | 1982-09-20 | 1984-03-24 | Isuzu Motors Ltd | Valve gear for internal-combustion engine |
| DE4112833A1 (en) * | 1990-12-19 | 1992-06-25 | Audi Ag | Variable valve control for IC engine gas exchange valve - has two parallel levers fitted between camshaft cam and valve sheet |
| JPH108930A (en) * | 1996-06-26 | 1998-01-13 | Aisin Seiki Co Ltd | Variable valve system |
| EP1331370A1 (en) * | 2002-01-28 | 2003-07-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable valve drive |
| DE10261163A1 (en) * | 2002-12-20 | 2004-07-08 | Volkswagen Ag | Variable valve gear for internal combustion engine has intermediate component supported on support element which is displaceable in housing by means of adjusting shaft |
| CN103939171A (en) * | 2013-01-21 | 2014-07-23 | 重庆长安汽车股份有限公司 | Variable valve lift mechanism of engine |
| CN204283544U (en) * | 2014-11-21 | 2015-04-22 | 瑞庆汽车发动机技术有限公司 | A kind of continuous variable valve stroke mechanism |
-
2014
- 2014-11-21 CN CN201410671532.8A patent/CN105673120A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2951361A1 (en) * | 1979-12-20 | 1981-07-02 | Bayerische Motoren Werke AG, 8000 München | Variable-lift IC engine valve actuating gear - has two facing lever arms in actuating train, one with effective length variable |
| US4414931A (en) * | 1981-10-13 | 1983-11-15 | Investment Rarities, Incorporated | Variable valve operating mechanism for internal combustion engines |
| JPS5951117A (en) * | 1982-09-20 | 1984-03-24 | Isuzu Motors Ltd | Valve gear for internal-combustion engine |
| DE4112833A1 (en) * | 1990-12-19 | 1992-06-25 | Audi Ag | Variable valve control for IC engine gas exchange valve - has two parallel levers fitted between camshaft cam and valve sheet |
| JPH108930A (en) * | 1996-06-26 | 1998-01-13 | Aisin Seiki Co Ltd | Variable valve system |
| EP1331370A1 (en) * | 2002-01-28 | 2003-07-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable valve drive |
| DE10261163A1 (en) * | 2002-12-20 | 2004-07-08 | Volkswagen Ag | Variable valve gear for internal combustion engine has intermediate component supported on support element which is displaceable in housing by means of adjusting shaft |
| CN103939171A (en) * | 2013-01-21 | 2014-07-23 | 重庆长安汽车股份有限公司 | Variable valve lift mechanism of engine |
| CN204283544U (en) * | 2014-11-21 | 2015-04-22 | 瑞庆汽车发动机技术有限公司 | A kind of continuous variable valve stroke mechanism |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110015274A (en) * | 2019-04-30 | 2019-07-16 | 盐城工业职业技术学院 | A kind of sand ground, muddy section automobile-used anti-sideslip deceleration device |
| CN110015274B (en) * | 2019-04-30 | 2023-12-15 | 盐城工业职业技术学院 | Automobile-used speed reducer that sideslips that prevents in sand land, muddy road section |
| CN110159387A (en) * | 2019-06-28 | 2019-08-23 | 广汽三菱汽车有限公司 | Crank rocker variable air valve lift apparatus |
| CN110173320A (en) * | 2019-06-28 | 2019-08-27 | 广汽三菱汽车有限公司 | The valve lift apparatus that valve stroke and valve opening time can be changed simultaneously |
| CN114412606A (en) * | 2022-01-14 | 2022-04-29 | 吉林大学 | Linear electric motor driven continuous variable valve mechanism |
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Application publication date: 20160615 |