CN1289796C - Hydraulic distributing mechanism for engine rotary valve - Google Patents
Hydraulic distributing mechanism for engine rotary valve Download PDFInfo
- Publication number
- CN1289796C CN1289796C CNB2003101236776A CN200310123677A CN1289796C CN 1289796 C CN1289796 C CN 1289796C CN B2003101236776 A CNB2003101236776 A CN B2003101236776A CN 200310123677 A CN200310123677 A CN 200310123677A CN 1289796 C CN1289796 C CN 1289796C
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- CN
- China
- Prior art keywords
- valve
- air inlet
- rotary valve
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
Abstract
The present invention relates to a hydraulic gas distribution of a rotary valve of an internal combustion engine, which is used as a component for replacing a cylinder head of a piston engine. An air inlet and outlet rotary valve, a valve sleeve and an oil piston are arranged in an air distributing valve body, wherein the air inlet and outlet rotary valve rotates synchronously in an opposite direction under the driving of a timing gear of an engine crankshaft; through the relative movement of an oil passage in the rotary valve and an oil inlet and outlet passage on the valve sleeve, the oil piston is controlled to move to and fro in the air distributing valve body so as to impel an air inlet and outlet valve to carry out switch motion. The valve sleeve of the air exhaust rotary valve can rotate a certain angle during braking, so that compared with the closing of the air exhaust valve during in normal work, the closing of the air exhaust valve is carried out in a time delay mode, and the time delay closing of the air exhaust valve of the engine cylinder is used, so that compressed air in the cylinder generates resistance for the upstream of the engine piston so as to achieve the effect of the braking of the engine.
Description
Technical field
The present invention relates to a kind of internal combustion engine valve distribution mechanism.
Background technique
At present, the distribution device of internal combustion engine all adopts cam directly or indirectly to drive the mechanical transmission of valve.Cam drives valve again through push rod, rocker arm body, and the gap when eliminating positive drive also has to add hydraulic tappet in the centre to eliminate the gap.But because of being subjected to the influence of difficulty of processing, structural complexity and operating mechanical wear, camshaft running clearance, the existence of circular runout, the noise that exists valve to impact inevitably, valve-closing does not sternly reach the unreliability of work, and advance (row) gas advance angle, retardation angle is influenced by the geometrical shape of cam and machining accuracy all, be difficult to revise easily and intuitively.(angle of desirable valve standard-sized sheet should be whole intake and exhaust stroke about the angle of cam whole unseat the valves of actual each stroke when rotating had only 30 to spend, be that cam turns over 90 degree), make the inlet and outlet amount can not reach maximum value, cause engine power effectively not bring into play.In addition, cam is that a spot of radial force promotion of the warping force decomposition generation valve of rotation is done vertical motion, and the major part kinetic equation loss had both increased the in-fighting of engine power in the running of camshaft, also accelerate the wearing and tearing of camshaft, reduced the performance of motor.And the distribution device processed complex of cam drive, technical requirements and cost height.For a change these shortcomings also occur some in theory and replace valve with ball valve, axle valve, directly the inlet and outlet of motor are controlled.But because of ball valve, the axle valve that can't solve rotation impacted by the internal-combustion engine high temperature and high pressure gas directly, the problem of fragile gas leakage is so all can't replace the distribution device of existing cams.In order to prevent vehicle skidding when wheel hub is braked, sideslip, begin all both at home and abroad to consider that the braking with motor cooperates braking and abbreviates this technology as " JAKE ", for reaching the engine braking of vehicle (boats and ships), need increase complicated apparatus on motor realizes, cost is big with the target ratio, and be difficult to reach target, can not popularization and application.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of hydraulic pressure distribution device of internal combustion engine, it can overcome the adverse effect that cause power performance in the cam valve distribution mechanism gap that actual standard-sized sheet process weak point, rotation and wearing and tearing back increase when inlet and outlet, the in-fighting of minimizing power.
For solving the problems of the technologies described above, the hydraulic pressure distribution device of internal combustion engine of the present invention comprises the distribution valve body, is arranged on air inlet valve pocket, exhaust valve pocket in the distribution valve body, the air inlet rotary valve and the exhaust rotary valve that match with air inlet valve pocket, exhaust valve pocket; Described air inlet rotary valve and exhaust rotary valve offer on the radial cross section oil-feed and draining passage and with valve pocket on advance, the draining hole connects in regular turn, meshing synchromesh gear mutually respectively is housed on air inlet rotary valve and the exhaust rotary valve, one of them rotary valve axle head is equipped with the timing follower in addition, engages transmission with timing gear on the engine crankshaft; The inlet and outlet rotary valve is synchronously with 1/4 rotary speed movement of engine crankshaft; Also comprise the oil pocket that air inlet valve pocket, exhaust valve pocket lower end are provided with respectively, match with oil pocket and oily piston moving up and down within it, the inlet and outlet door that is arranged on oily piston lower end and can passes by oily piston rod; Be set in and promote the valve spring of moving on the oily piston on the prolongation axle of inlet and outlet door, the draining road that is arranged on air inlet valve pocket and exhaust valve pocket side in the distribution valve body and communicates with the draining hole and the oil pocket of valve pocket.
The invention has the beneficial effects as follows that valve and driving mechanism are realized the transmission of no gap, valve opening is fast, and wide-open time is long, makes the tolerance of motor inlet and outlet abundant, improves output power.When the time that valve is all opened during inlet and outlet is cam drive three times, abundant because of air inlet, help improving combustion efficiency of fuel oil, reach fuel-economizing, environmental protection, reduce the valve noise, improve the purpose in the working life of distribution device.The present invention need not increase complex mechanism, just can reach the effect of engine braking, helps improving the braking ability of vehicle (boats and ships).
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the sectional view of the hydraulic pressure distribution device of internal combustion engine of the present invention;
Fig. 2 is the axial section of the hydraulic pressure distribution device exhaust valve of internal combustion engine of the present invention;
Fig. 3 is a schematic representation of using engine braking of the present invention (vehicle);
Fig. 4 is the structural drawing of another mode of execution of the present invention.
Embodiment
As shown in Figure 1, 2, the hydraulic pressure distribution device of internal combustion engine of the present invention with parts such as camshaft of the prior art, push rod, tappet, rocking arms, substitutes with rotary valve, valve pocket, oily piston.Left side shown in Figure 1 is an intake valve 11, and the right side is an exhaust valve 24, the position when being in the beginning intake stroke of cylinder.It comprises distribution valve body 5, and air inlet valve pocket 2, exhaust valve pocket 4 are set in this distribution valve body 5.Associated air inlet rotary valve 1 and exhaust rotary valve 22 are set in air inlet valve pocket 2, exhaust valve pocket 4.Described air inlet rotary valve 1 and exhaust rotary valve 22 offer on the radial cross section oil-feed and draining passage and with valve pocket on advance, the draining hole connects in regular turn.In the inlet and outlet valve pocket 2,4 one fixing with distribution valve body 5, another can do the rotation of several angle when dynamic braking.
Mutually meshing synchromesh gear 12 respectively is housed on air inlet rotary valve 1 and the exhaust rotary valve 22, and one of them rotary valve axle head is equipped with timing follower 13 in addition, engages transmission with timing gear (not shown) on the engine crankshaft.
It also is included in the oil pocket 23 that air inlet valve pocket 2, exhaust valve pocket 4 lower ends are provided with respectively, match and oily piston 3 moving up and down within it with oil pocket 23, the inlet and outlet door 11,24 that is arranged on oily piston 3 lower ends and can be passed by oily piston rod is in the sheathed valve spring 10 of moving on the oily piston 3 of promoting on the prolongation axle of inlet and outlet door 11,24.In distribution valve body 5, also be provided with in air inlet valve pocket 2 and the draining road 74 side settings of exhaust valve pocket and that communicate with the draining hole and the oil pocket 23 of valve pocket 2,4.
When the hydraulic pressure distribution device of internal combustion engine of the present invention was worked, the timing gear (not shown) on the bent axle drove the timing follower 13 on the exhaust rotary valve 22 and drives inlet and outlet rotary valves 1,22 through synchromesh gear 12 and rotates in opposite directions.With the intake valve is example: air inlet rotary valve 1 is under synchromesh gear 12 drives, counterclockwise with 1/4 speed ratio turn round air inlet valve pocket 2 in (motor is finished four strokes of a work cycle, rotary valve commentaries on classics half cycle).Pressure oil enters upper oil cavitie 9 through the oil pipe (not shown) from the radial bore of oil inlet hole on air inlet rotary valve 1 on the distribution valve body 5 from the oil pump for engine of enlargement discharge, promote the elastic force that oily piston 3 overcomes valve spring 10, promotion intake valve 11 moves down opens intake valve 11 beginning air inlets.Oil piston 3 goes downwards to before bottom dead center, stops because of spill port is sealed to cushion by oily piston 3 gradually, and this moment, valve was opened for maximum value.When entering compression stroke, filler opening is closed, and the draining passage along the circumferential direction on the air inlet rotary valve 1 forwards upper oil cavitie 9 to, and upper oil cavitie 9 and draining road 7 are connected.Intake valve 11 promotes oily piston 3 under the effect of valve spring 10 up, before nearly closing near the valve seat on the cylinder head 6 to intake valve 11, the last axle head that protrudes on the oil piston 3 cuts off the primary path of upper oil cavitie 9 with draining road 7, pressure oil only flows out through the throttling groove of last axle head, the chamfering of the last axle head that protrudes on the oily piston 3 among Fig. 1 is throttling groove, and intake valve 11 bufferings are closed.Motor enters expansion space stroke and exhaust stroke during the later stage, and draining road 7 and filler opening all are in closed position, and under valve spring 10 and cylinder pressure effect, intake valve 11 is to maintain the closed position.When entering exhaust stroke will finish the time, air inlet rotary valve 1 turns over 180 degree, and the opposite side of oil inlet hole forwards to again and filler opening docking location (having the inlet and outlet overlapping angle) on the air inlet rotary valve 1, begins the intake stroke of next work cycle.
The right side is the driving structure of exhaust valve 24 among Fig. 1, and the working principle of exhaust gear is identical with admission gear, is scavenging action when just valve is opened.For reaching the purpose of utilizing engine braking, the shunt Brake pipe of brake pump was received (motor on the boats and ships also can directly rotate valve pocket, does not need the dynamic braking cylinder) on the dynamic braking cylinder when the present invention will brake.When stepping on brake, the piston push rod of dynamic braking cylinder turns over several angle with the valve pocket of outlet valve along the direction that rotary valve rotates, reach and exhaust valve is opened delay time when closing than proper functioning, like this, when engine exhaust, because of exhaust valve can not in time be opened, and this moment, intake valve was in closed condition, be compressed the resistance of air when engine piston is up, engine speed is descended, reach the braking purpose.In the time of near engine piston is up near top dead center, outlet valve is opened again, discharges compressed-air actuated energy, and the compression that prevents air can be delivered to motor again makes its acceleration.Excessive as the valve pocket rotation angle, will cause the slow excessively phenomenon of exhaust valve closing when air inlet, though can strengthen this " JAKE " effect, also can cause the part inflammable gas to overflow from exhaust valve.Therefore the rotation angle of the valve pocket of exhaust valve rotation should reach the idling adjustment of motor according to actual needs.When motor had 4 cylinders, it is identical that the inlet and outlet rotary valve axially respectively has 4 shapes on the cross section of corresponding each cylinder valve, and angle differs the oil inlet hole and the drain pans of 45 degree, guarantees each cylinder sequence work.Distribution valve body 5 on the hydraulic fluid port house steward, an one-way valve (not shown) is installed respectively, guarantee that the oil of oil input channels in oil inlet pipe and the distribution valve body 5 all is being full of at ordinary times, prevent that air from entering the instantaneity of influence startup and valve switch.Air inlet rotary valve 1 should guarantee precision with air inlet valve pocket 2 and oily piston 3 with cooperating of oil pocket 23, and air inlet valve pocket 2 can be fixed with distribution valve body 5.Fig. 2 is the axial section of exhaust valve of the present invention, and only the engine type with 2 cylinders is an example.The braking function of motor is (is example with the vehicle) as shown in Figure 3, and exhaust valve pocket 4 is in distribution valve body 5, and the brake bar 15 in the master cylinder 16 is connected with exhaust valve pocket 4.Depress pedal 18 during braking, brake pump 20 pressure oil output passed on the wheel braking hoof 21, as the wheel braking of routine through oil pipe in 19 minutes two the tunnel, the one road.Another road is passed in the dynamic braking cylinder 16, through pull bar 15 exhaust valve pocket 4 is turned an angle, and the unlatching that makes exhaust valve 24 is delayed time during than proper functioning, reaches the purpose of engine braking.Exhaust valve pocket 4 under the spring 17 in master cylinder 16 and the effect of pull bar 15, is pressed on the spacing screw 14 of valve pocket when not braking, and is in the normal position the same with air inlet valve pocket 2, makes the motor proper functioning.
Fig. 4 is the mode of execution of the another kind of rotary valve structure of the present invention, and the left side is an intake valve among the figure, and the right side is an exhaust valve, the position when being in the intake stroke of cylinder.Its working principle is identical with Fig. 1, is the position difference of the turnover oilhole of distribution valve body 5, inlet and outlet rotary valve 1,22 no independent oil inlet holes, and the turnover oilhole is same oil groove along the circumferential direction.Intake valve 11 with the left side is an example, during air inlet, side oil inlet passage on the air inlet rotary valve 1 is connected the upper oil cavitie 9 of oil inlet hole on the air inlet valve pocket 2 and oily piston 3, pressure oil enters oil cylinder 23 through the left side filler opening, make oily piston 3 pressurizeds, overcome valve spring 10 promotion intake valves 11 and move down, intake valve 11 is opened.When air inlet finished, the oil inlet passage on the air inlet rotary valve 1 forwarded the position that disconnects with oil inlet hole to, and the upper cylinder 9 of oily piston 3 is connected with drain tap, and intake valve 11 is moving on the oily piston 3 of promotion under the effect of valve spring 10, and intake valve 11 is closed.Intake stroke up to next work cycle begins, and the opposite side oil inlet passage of rotary valve is connected with oil inlet hole again.Other structure is identical with structural type shown in Figure 1.Equally, the house steward of the buffering of oily piston 3, turnover oilhole one-way valve is set should be identical with previous embodiment.As another embodiment, there is different specific implementations with clear and definite rotary valve of the present invention.The situation that the inlet and outlet door can common cam shaft is the same with existing on the present existing motor, and the rotary valve of inlet and outlet of the present invention and valve pocket also exist shared scheme.
Claims (3)
1, a kind of hydraulic pressure distribution device of internal combustion engine, it comprises the distribution valve body, is arranged on air inlet valve pocket, exhaust valve pocket in the distribution valve body, the air inlet rotary valve and the exhaust rotary valve that match with air inlet valve pocket, exhaust valve pocket; It is characterized in that: described air inlet rotary valve and exhaust rotary valve offer on the radial cross section oil-feed and draining passage and with valve pocket on advance, the draining hole connects in regular turn, meshing synchromesh gear mutually respectively is housed on air inlet rotary valve and the exhaust rotary valve, one of them rotary valve axle head is equipped with the timing follower in addition, engages transmission with timing gear on the engine crankshaft; The inlet and outlet rotary valve is synchronously with 1/4 rotary speed movement of engine crankshaft; Also comprise the oil pocket that air inlet valve pocket, exhaust valve pocket lower end are provided with respectively, match with oil pocket and oily piston moving up and down within it, the inlet and outlet door that is arranged on oily piston lower end and can passes by oily piston rod; Be set in and promote the valve spring of moving on the oily piston on the prolongation axle of inlet and outlet door, the draining road that is arranged on air inlet valve pocket and exhaust valve pocket side in the distribution valve body and communicates with the draining hole and the oil pocket of valve pocket.
2, the hydraulic pressure distribution device of internal combustion engine according to claim 1 is characterized in that: the last axle head that protrudes on the oily piston offers throttling groove.
3, the hydraulic pressure distribution device of internal combustion engine according to claim 1 is characterized in that: suction valve and distribution valve body are fixed, and outlet valve can be done the rotation of several angle when dynamic braking.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101236776A CN1289796C (en) | 2003-10-13 | 2003-12-18 | Hydraulic distributing mechanism for engine rotary valve |
| PCT/CN2004/001153 WO2005038201A1 (en) | 2003-10-13 | 2004-10-11 | A hydraulic actuating mechanism for inlet and exhaust |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200320101233 | 2003-10-13 | ||
| CN200320101233.8 | 2003-10-13 | ||
| CNB2003101236776A CN1289796C (en) | 2003-10-13 | 2003-12-18 | Hydraulic distributing mechanism for engine rotary valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1529041A CN1529041A (en) | 2004-09-15 |
| CN1289796C true CN1289796C (en) | 2006-12-13 |
Family
ID=34465865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101236776A Expired - Fee Related CN1289796C (en) | 2003-10-13 | 2003-12-18 | Hydraulic distributing mechanism for engine rotary valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1289796C (en) |
| WO (1) | WO2005038201A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325826C (en) * | 2005-01-24 | 2007-07-11 | 邮政科学上海研究所 | High negative pressure large flow rotary air valve |
| ITBO20060442A1 (en) * | 2006-06-07 | 2007-12-08 | Mario Brighigna | INTERNAL COMBUSTION ENGINE WITH ROTATING DISTRIBUTION |
| KR100868210B1 (en) * | 2006-12-07 | 2008-11-11 | 현대자동차주식회사 | Oil supply circuit for cylinder deactivation system |
| WO2010017759A1 (en) * | 2008-08-13 | 2010-02-18 | 奇瑞汽车股份有限公司 | A hydraulic camshaft and a hydraulic controlling system thereof |
| CN101936199B (en) * | 2010-09-20 | 2012-10-03 | 武央 | Hydraulic transmission air distribution system of motorcar engine |
| US9194264B2 (en) | 2011-08-09 | 2015-11-24 | Amir Khajepour | Systems and methods for variable valve actuation |
| CN106089350B (en) * | 2016-06-07 | 2018-05-01 | 浙江大学 | Two cycle compression release type brake device of engine and its braking method |
| DE102017201343A1 (en) * | 2017-01-27 | 2018-08-02 | Mahle International Gmbh | Valve gear for a reciprocating internal combustion engine and method for valve control in a reciprocating internal combustion engine |
| CN110259540B (en) * | 2019-07-08 | 2023-09-12 | 浙江大学 | Engine exhaust braking energy recovery device and method thereof |
| CN110645066A (en) * | 2019-11-07 | 2020-01-03 | 潍坊力创电子科技有限公司 | Compression release type in-cylinder brake device for engine |
| CN113104711B (en) * | 2021-03-18 | 2022-09-16 | 中铁五局集团第一工程有限责任公司 | Braking type elevator for unfavorable geological construction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3833459A1 (en) * | 1988-10-01 | 1990-04-05 | Audi Ag | Hydraulic valve gear for an internal combustion engine |
| JPH03206310A (en) * | 1990-01-08 | 1991-09-09 | Yoshiyuki Yonezu | Device possible to directly open/close suction/exhaust valve of engine and to freely perform external operation |
| EP0767295B1 (en) * | 1995-10-03 | 2000-03-08 | Wärtsilä NSD Schweiz AG | Hydraulic valve |
| CN1079507C (en) * | 1997-06-20 | 2002-02-20 | 日野自动车工业株式会社 | Multi-stage stroke cylinder |
| DE19853355C1 (en) * | 1998-11-19 | 2000-08-31 | Daimler Chrysler Ag | Hydraulically controllable lift valve |
-
2003
- 2003-12-18 CN CNB2003101236776A patent/CN1289796C/en not_active Expired - Fee Related
-
2004
- 2004-10-11 WO PCT/CN2004/001153 patent/WO2005038201A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN1529041A (en) | 2004-09-15 |
| WO2005038201A1 (en) | 2005-04-28 |
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Granted publication date: 20061213 Termination date: 20101218 |