CN108087052B - A kind of hydraulic multi-mode Variabale valve actuation system - Google Patents
A kind of hydraulic multi-mode Variabale valve actuation system Download PDFInfo
- Publication number
- CN108087052B CN108087052B CN201711332703.4A CN201711332703A CN108087052B CN 108087052 B CN108087052 B CN 108087052B CN 201711332703 A CN201711332703 A CN 201711332703A CN 108087052 B CN108087052 B CN 108087052B
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- Prior art keywords
- oil
- stroke
- mode
- valve
- spool
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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
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
Abstract
A kind of hydraulic multi-mode Variabale valve actuation system, belongs to engine valve actuations field.It mainly includes low pressure source, oil transportation check valve, cam, plunger pump, valve actuation device, gate gurgle valve, mode switch.Mode switch includes the shell for being provided with the spool of two-stroke drain pan, four stroke drain pans, oil supply tank, two-stroke driver slot and four stroke driver slots and being provided with oil-feed port, drain tap and driving mouth.By the axial position of control mode switch device spool, the switching between four-stoke mode and two-stroke mode is realized；The switching, it can be achieved that drive mode and braking mode is matched with camshaft phase modulating mechanism；By controlling the open/close states of gate gurgle valve, it can be achieved that flexible changeable air valve event；It is respectively that four-stoke mode and two-stroke mode flexibly choose plunger pump and start fuel feeding and start moment, the value of above-mentioned parameter such as draining to be no longer influenced by the limitation of cam profile according to type.
Description
Technical field
The present invention relates to a kind of hydraulic multi-mode Variabale valve actuation systems, belong to engine valve actuations field.
Background technique
Laws and regulations in terms of increasingly strict energy-saving and emission-reduction and vehicle safety push the quick of engine new technology
Development.Because it has the potentiality for improving engine performance, changeable air valve, stroke changeable number, cylinder deactivation, auxiliary braking, variable combustion
The technologies such as mode, variable compression ratio receive significant attention.Research tendency both domestic and external is to study the effect of these technology synergies to hair
The influence of motivation performance, it is clear that the scheme of application on the engine is infeasible simultaneously by the existing execution system of every technology.This
A little technologies can be matched to realize by electronic control injection technology and the sufficiently high changeable air valve technology of degree of flexibility.Electronic control injection
Technology is more mature, and existing changeable air valve technology is that the drive mode for being directed to four-stroke engine or two-stroke are started mostly
The drive mode exploitation of machine, therefore, to above-mentioned every technology is applied to an engine, this requires variable valve actuation
System can flexibly be cut between four stroke drive modes, two-stroke drive mode, four stroke braking modes, two-stroke braking mode
It changes, and under above-mentioned respective mode, it is flexibly adjustable that valve opens and closes parameter.There has been no a Variabale valve actuation systems at present can
Meet above-mentioned requirements.
Summary of the invention
It is an object of the invention to: 1) realize four stroke drive mode of engine, two-stroke drive mode, the braking of four strokes
Flexibly switch between mode, two-stroke braking mode.2) in each mode, realize that valve opening and closing parameter is flexibly adjustable, substantially
Degree ground improves the purpose of engine performance.3) plunger pump under different mode start fuel feeding and start the moment such as draining can be independent
Flexible modulation.
The technical solution adopted by the present invention is that: a kind of hydraulic multi-mode Variabale valve actuation system, it mainly includes low pressure
Source, cam, plunger pump, oil transportation check valve, mode switch, the gentle gate driver of gate gurgle valve.Mode switch have spool and
Shell, wherein be provided with oil-feed port, drain tap and driving mouth on shell, be provided with two-stroke drain pan on spool, four strokes are let out
Oil groove, oil supply tank, two-stroke driver slot and four stroke driver slots, oil-feed port are connected with oil supply tank always, and spool every 720 is write music axis
Corner rotates a circle, and spool tool respectively corresponds four-stoke mode and two-stroke mode there are two axial position.Cam every 360 is write music
Shaft angle rotates a circle, and adjusts its phase by camshaft phase modulating mechanism, cam is evenly distributed with M cam lobes.Plunger pump is driven by cam
Dynamic, low pressure source is connected by oil pocket oil transportation of the oil transportation check valve to plunger pump, the oil pocket of plunger pump with oil-feed port, drain tap with let out
The oil outlet of oil valve is connected with low pressure source, and driving mouth is connected with the oil pocket of valve actuation device, the connection of the oil inlet of gate gurgle valve
The oil circuit that end is arranged in the oil circuit between driving mouth and valve actuation device or is arranged between the oil pocket of plunger pump and oil-feed port.In
Under four-stoke mode, axial position where driving mouth against four stroke driver slots, axis where drain tap against four stroke drain pans
To position.Under two-stroke mode, driving mouth is against axial position where two-stroke driver slot, and drain tap is against two-stroke draining
Axial position where slot.
The beneficial effects of the present invention are: (a) passes through the axial position of control mode switch device spool, four-stoke mode is realized
Switching between two-stroke mode；The switching, it can be achieved that drive mode and braking mode is matched with camshaft phase modulating mechanism.
(b) by the open/close states of control gate gurgle valve, flexible changeable air valve event can be realized in each mode.(c) four stroke mould
Formula and two-stroke mode choose that plunger pump starts fuel feeding and to start the value at the moment such as draining independently flexible, are no longer influenced by cam type
The limitation of line.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is hydraulic multi-mode Variabale valve actuation system schematic diagram.
Fig. 2 is mode switch schematic diagram.
Fig. 3 is mode switch spool schematic diagram.
Fig. 4 is A-A the and G-G sectional view of mode switch.
Fig. 5 is the section B-B figure of mode switch.
Fig. 6 is the C-C sectional view of mode switch.
Fig. 7 is the D-D sectional view of mode switch.
Fig. 8 is the E-E sectional view of mode switch.
Fig. 9 is the F-F sectional view of mode switch.
In figure: 1, low pressure source, 2, cam, 3, plunger pump, 4, oil transportation check valve, 5, mode switch, 5a, spool are 5b, outer
Shell, 5IN, oil-feed port, 5OUT, drain tap, 5A, driving mouth, 5a1, two-stroke drain pan, 5a2, four stroke drain pans, 5a3, confession
Oil groove, 5a4, two-stroke driver slot, 5a5, four stroke driver slots, 6, gate gurgle valve, 7, valve actuation device.
Specific embodiment
Fig. 1 is hydraulic multi-mode Variabale valve actuation system schematic diagram.Fig. 2 is that the mode switch under four-stoke mode is shown
It is intended to.Fig. 3 is mode switch spool schematic diagram.Fig. 4 is A-A the and G-G sectional view of mode switch.Fig. 5 to Fig. 9 is respectively
Section B-B, the section C-C, the section D-D, the section E-E and the F-F schematic cross-section of mode switch under four-stoke mode.It is this
Hydraulic multi-mode Variabale valve actuation system, it mainly includes that low pressure source 1, cam 2, plunger pump 3, oil transportation check valve 4, mode are cut
Parallel operation 5, the gentle gate driver 7 of gate gurgle valve 6.Mode switch 5 has spool 5a and shell 5b.Oil-feed port is provided on shell 5b
Two-stroke drain pan 5a1, four stroke drain pan 5a2, oil supply tank are provided on 5IN, drain tap 5OUT and driving mouth 5A, spool 5a
5a3, two-stroke driver slot 5a4 and four stroke driver slot 5a5, oil-feed port 5IN are connected with oil supply tank 5a3 always, spool 5a every 720
Crank angle degrees rotate a circle, and spool 5a tool respectively corresponds four-stoke mode and two-stroke mode there are two axial position.Cam 2
Every 360 crank angle degrees rotate a circle, and adjust its phase by camshaft phase modulating mechanism, cam 2 is evenly distributed with M cam lobes, wherein
M is positive integer.Plunger pump 3 is driven by cam 2, and low pressure source 1 passes through oil pocket oil transportation of the oil transportation check valve 4 to plunger pump 3, plunger
The oil pocket of pump 3 is connected with oil-feed port 5IN, and the oil outlet of drain tap 5OUT and gate gurgle valve 6 is connected with low pressure source 1, drives mouth 5A
Be connected with the oil pocket of valve actuation device 7, the setting of the connecting pin of the oil inlet of gate gurgle valve 6 driving mouth 5A and valve actuation device 7 it
Between oil circuit or the oil circuit that is arranged between the oil pocket of plunger pump 3 and oil-feed port 5IN.Fig. 2 to Fig. 9 that the present invention provides is spool
The example that every 720 crank angle degrees of 5a rotate a circle.
The case where Fig. 5 to Fig. 9 is four-stoke mode, axial position where driving mouth 5A against four stroke driver slot 5a5, lets out
Axial position where hydraulic fluid port 5OUT against four stroke drain pan 5a2.From current time, spool 5a continues to revolve through X0 degree, driving
Mouth 5A is connected by four stroke driver slot 5a5, two-stroke driver slot 5a4, oil supply tank 5a3 with oil-feed port 5IN；Spool 5a continues to turn
X1 degree is crossed, driving mouth 5A will be closed.Drain tap 5OUT passes through four stroke drain pans before (360-X5) bottom valve core 5a corner
5a2, oil supply tank 5a3 are connected with oil-feed port 5IN；Spool 5a continues to revolve through X4 degree, and drain tap 5OUT will be closed.
When spool 5a opposite shell 5b downlink, this system will switch to two-stroke mode from four-stoke mode.Drive mouth 5A
Axial position where against two-stroke driver slot 5a4, axial position where drain tap 5OUT against two-stroke drain pan 5a1.Valve
When the circumferential angle of core 5a opposite shell 5b remains as current angular, spool 5a continues to revolve through X2 degree, and driving mouth 5A passes through two punchings
Journey driver slot 5a4, oil supply tank 5a3 are connected with oil-feed port 5IN；Spool 5a continues to revolve through X3 degree, and driving mouth 5A will be closed；Spool
5a continue to revolve through (180+X2) degree, driving mouth 5A by two-stroke driver slot 5a4, oil supply tank 5a3 again with oil-feed port 5IN phase
Even；Spool 5a continues to revolve through (180+X3) degree, and driving mouth 5A will be again turned off.Drain tap 5OUT is before X7 bottom valve core 5a corner
It is connected by two-stroke drain pan 5a1, four stroke drain pan 5a2, oil supply tank 5a3 with oil-feed port 5IN；Spool 5a continues to revolve through X6
Degree, drain tap 5OUT will be closed；Spool 5a continue to revolve through (180-X7) degree, drain tap 5OUT by two-stroke drain pan 5a1,
Four stroke drain pan 5a2, oil supply tank 5a3 are connected again with oil-feed port 5IN；Spool 5a continues to revolve through (180+X6) degree, drain tap
5OUT will be again turned off.Therefore the present invention in four-stoke mode and two-stroke mode choose plunger pump start fuel feeding
It is independently flexible with the value that starts the moment such as draining, it is no longer influenced by the limitation of cam profile.
Claims (1)
1. a kind of hydraulic multi-mode Variabale valve actuation system, it mainly includes low pressure source (1), cam (2), plunger pump (3), defeated
Oily check valve (4), gate gurgle valve (6), valve actuation device (7), it is characterized in that: further comprising with spool (5a) and shell (5b)
Mode switch (5), is provided with oil-feed port (5IN), drain tap (5OUT) and driving mouth (5A) on shell (5b), on spool (5a)
It is provided with two-stroke drain pan (5a1), four stroke drain pans (5a2), oil supply tank (5a3), two-stroke driver slot (5a4) He Sichong
Journey driver slot (5a5), oil-feed port (5IN) are connected with oil supply tank (5a3) always, the every 720 crank angle degrees rotation one of spool (5a)
In week, there are two axial positions for spool (5a) tool；Every 360 crank angle degrees of cam (2) rotate a circle, by camshaft phase modifier
Structure adjusts its phase, and cam (2) is evenly distributed with M cam lobes；The plunger pump (3) is driven by cam (2), and low pressure source (1) passes through
The oil pocket of oil pocket oil transportation of the oil transportation check valve (4) to plunger pump (3), plunger pump (3) is connected with oil-feed port (5IN), drain tap
The oil outlet of (5OUT) and gate gurgle valve (6) is connected with low pressure source (1), drives the oil pocket phase of mouth (5A) and valve actuation device (7)
Even, oil circuit or setting of the connecting pin setting of the oil inlet of gate gurgle valve (6) between driving mouth (5A) and valve actuation device (7) exist
Oil circuit between the oil pocket and oil-feed port (5IN) of plunger pump (3)；Under four-stoke mode, driving mouth (5A) is driven against four strokes
Axial position where dynamic slot (5a5), axial position where the opposite four stroke drain pans (5a2) of drain tap (5OUT)；In two-stroke
Under mode, axial position where driving mouth (5A) opposite two-stroke driver slot (5a4), the opposite two-stroke draining of drain tap (5OUT)
Axial position where slot (5a1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711332703.4A CN108087052B (en) | 2017-12-13 | 2017-12-13 | A kind of hydraulic multi-mode Variabale valve actuation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711332703.4A CN108087052B (en) | 2017-12-13 | 2017-12-13 | A kind of hydraulic multi-mode Variabale valve actuation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087052A CN108087052A (en) | 2018-05-29 |
| CN108087052B true CN108087052B (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711332703.4A Expired - Fee Related CN108087052B (en) | 2017-12-13 | 2017-12-13 | A kind of hydraulic multi-mode Variabale valve actuation system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578152B (en) * | 2018-12-11 | 2020-07-24 | 大连理工大学 | Hydraulic continuously variable valve driving mechanism with cylinder deactivation function and control method |
| CN113463638B (en) * | 2021-06-22 | 2022-02-08 | 中铁五局集团第一工程有限责任公司 | Diversion branch tunnel construction method capable of carrying out water characteristic identification |
| CN115182800B (en) * | 2022-07-20 | 2024-04-09 | 山东大学 | Hydraulic valve mechanism for realizing different lift of same-name valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651687A (en) * | 1985-12-20 | 1987-03-24 | Kawasaki Jukogyo Kabushiki Kaisha | Automatic compression releasing device for four-cycle engine |
| EP1618293B1 (en) * | 2003-03-29 | 2008-09-24 | Hydraulik-Ring Gmbh | Variable valve lift device for the lift adjustment of gas-exchange valves of an internal combustion engine |
| CN105134323B (en) * | 2015-08-08 | 2018-12-25 | 大连理工大学 | A kind of multifunction changable valve-driving system |
| CN106640252B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of axial displacement multi-mode hydraulic variable valve drive system |
| JP6190997B1 (en) * | 2017-04-07 | 2017-09-06 | 正裕 井尻 | Valve drive mechanism of internal combustion engine |
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| CN108087052A (en) | 2018-05-29 |
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Granted publication date: 20191122 Termination date: 20211213 |