CN105179091A - Compression type speed reducing system for automobile engine - Google Patents
Compression type speed reducing system for automobile engine Download PDFInfo
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- CN105179091A CN105179091A CN201510491515.0A CN201510491515A CN105179091A CN 105179091 A CN105179091 A CN 105179091A CN 201510491515 A CN201510491515 A CN 201510491515A CN 105179091 A CN105179091 A CN 105179091A
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- piston
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- exhaust
- rocking arm
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Abstract
The invention discloses a compression type speed reducing system of an automobile engine. When an automobile travels, the system can make a deflation swing arm and an exhaust valve swing arm be connected to swing together at the right moment when a driver sends out a speed reducing command, fuel oil supply to the engine is stopped, the automobile is not in the neutral position and a clutch is in a completely combined state so that the exhaust valve swing arm can be driven by an exhaust cam to open an exhaust valve during exhaust stroke and can also be driven by a deflation cam to open the exhaust valve when a piston is close to a compression top dead center, and compressed air consuming automobile kinetic energy is exhausted so that pushing of the piston by the compressed air can be reduced when the piston is in the acting stroke; the exhaust valve is closed soon after acting stroke is started so that negative pressure can be generated to increase the movement resistance of the piston when the piston moves, in this way, the engine is converted into an air compressor, and the inertial movement energy of the automobile is consumed through the compressed air.
Description
One. technical field
The present invention relates to the slow system of a kind of motor car engine compression type, it is simpler, compacter than the structure of the known slow system of motor car engine compression type, weight is lighter.
Two. background technique
At present, the effect of the slow system of known motor car engine compression type is: when automobile inertial runs, driving wheel drives engine running by transmission system, thus to consume the operation energy of automobile thus to realize reducing motion speed or reducing running acceleration.It is change valve timing by hydraulic transmission that present motor car engine compression type brakes slow system, when making engine piston run near, back down exhaust valve, pressurized air in firing chamber is released outside cylinder, thus do not have pressurized air promotion piston to run to lower dead center when working stroke, the anti-braking force of dragging of motor can be increased so further, strengthen the slow usefulness of braking of motor.Shortcoming is complex structure, bulky, weight is comparatively large, when installing or rebuild an engine adjustment valve time need to carry out gap adjustment.
Three. summary of the invention
In order to overcome the complex structure that the slow system of existing motor car engine compression type exists, bulky, weight comparatively large, install time or rebuild an engine adjustment valve time need to carry out the shortcomings such as gap adjustment, the invention provides the slow system of a kind of motor car engine compression type, this system can when driver needs motor to carry out braking slow, and motor can provide braking slow usefulness in good time.
The technical solution used in the present invention is: be made up of camshaft, two exhaust valve rocker arms, venting rocking arm, retaining spring, synchronous rocker piston group, pitman arm shaft, machine oil pipe, pressure maintaining valve, solenoid valve, electronic oil pump, slow control circuits.
When motor is in Power output, the exhaust cam in camshaft drives exhaust valve rocker arm shake by driving valve roller bearing to realize, and exhaust valve is opened when exhaust stroke, is discharged by the waste gas after burning outside cylinder; Releasing cam in camshaft drives venting rocking arm to do idle freely shaking by driving valve roller bearing to realize.When driver needs that motor is counter drags automobile to carry out braking slow, solenoid valve closes drain tap in good time, machine oil is in time pumped into machine oil pipe to promote timing piston thus to promote synchronous piston by oil pump, after exhaust valve rocker arm and venting rocking arm are connected, exhaust valve rocker arm and venting rocking arm had both driven with the exhaust cam in camshaft and had shaken, exhaust valve is opened when exhaust stroke, drive with the releasing cam in camshaft again and shake, exhaust valve is progressively opened close to during compression top center at piston, to be released outside cylinder by pressurized air, make the energy in pressurized air can not produce impetus when piston runs to lower dead center to piston, start shortly to close exhaust valve at piston expansion stroke, negative pressure is produced to increase resistance to motion while making piston when continuing to move to lower dead center.
Advantage of the present invention is, structure is simple, volume is little, lightweight, and part is few, do not have adjusted iterm.
Four. accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described with enforcement.
Fig. 1 is camshaft of the present invention, and phase the other side of each cam puts and corresponding sense of rotation schematic diagram
Fig. 2 is the corresponding relation of each cam of the present invention and each rocking arm and rocking arm and pitman arm shaft partial cutaway schematic
Fig. 3 is the relative position relation schematic diagram of second row valve rocker of the present invention and valve and exhaust cam
Fig. 4 is the relative position relation schematic diagram of first row valve rocker of the present invention and valve and exhaust cam
Fig. 5 is the corresponding position relation schematic diagram of venting rocking arm of the present invention and releasing cam
Fig. 6 is the control system schematic diagram of synchronous piston activity of the present invention
In figure: 1. camshaft, 2. the first exhaust cam, 3. releasing cam, 4. the second exhaust cam, 5. first row valve rocker, 6. venting rocking arm, 7. second row valve rocker, 8. pitman arm shaft, 9. oil hole, 10. timing piston, 11. first synchronous pistons, 12. hollow oil ducts, waft platform in 13. first location, 14 second synchronous pistons, waft platform in 15. second location, 16. oil ducts, 17. stop piston reset spring, 18. stop piston, 19. second adjustment screws, 20 stop piston hole, 21. first synchronous piston holes, 22. first adjustment screws, 23. cylinder head, 24. plane of orientations, 25. second synchronous piston holes, 26. retaining spring 27. three-way magnetic valves, 28 valve core reseting springs, 29. spools, 30. electromagnetic valve coils, 31. slow control circuits, 32. machine oil pipes, 33. first roller bearings, 34. three rollers bearings, 35. second roller bearings, 36 electronic oil pumps, 37. pressure maintaining valves.
Five. embodiment
The slow system of motor car engine compression type is by cylinder head (23), camshaft (1), first exhaust rocker arm, second exhaust rocker arm (7), venting rocking arm (6) pitman arm shaft (8), timing piston (10), first synchronous piston (11), second synchronous piston resistance (14) gear piston (18), stop piston reset spring (17), first roller bearing (33), second roller bearing (34), three rollers bearing (35), machine oil pipe (32), solenoid valve (27), electronic oil pump (36), the gentle fast control circuit composition of pressure maintaining valve (37).
In FIG, camshaft (1) has the first exhaust cam (2), the second exhaust cam (4) and releasing cam (3), sense of rotation n display releasing cam (4) is positioned at the corresponding position near compression stroke end of a period.
In fig. 2, the effect of the first exhaust cam (2) and the second exhaust cam (4) is: when exhaust stroke by difference driven roller bearing (33) and roller bearing (35), make first row valve rocker (5) and second row valve rocker (7) open exhaust valve, the effect of releasing cam (3) is: when piston is close near, by driving three rollers bearing (34) thus making venting rocking arm (6) shake, first row valve rocker (5), second row valve rocker (7) venting rocking arm (6) are all arranged on arm axle (8), install and coordinate for Spielpassung, roller bearing is all installed to reduce surface friction drag during actuated by cams rocking arm in each rocking arm, the hollow oil duct (12) of pitman arm shaft (8) establishes oil hole (9) and communicates with the oil duct (16) in first row valve rocker (5) and the first synchronous piston hole (21), first row valve rocker (5) is provided with the first roller bearing (33) and is provided with the first location and to waft platform (13 and the first synchronous piston hole, timing piston (10) and the first synchronous piston (11) are housed in the first synchronous piston hole (21), when the first synchronous piston (11) does not enter second synchronous piston hole (25), and under the second roller bearing (34) in venting rocking arm (6) is in the state not contacting releasing cam (3), the first location platform (13) that wafts is all contact with the plane of orientation (24) in venting rocking arm (6), thus the first synchronous piston hole (21) is overlapped with the center line in the second synchronous piston hole (25) in venting rocking arm (6), second row valve rocker (7) is provided with the second roller bearing (35) and be provided with the second location waft platform (15) and stop piston hole (20), stop that piston hole (20) is built with stop piston (18) and stop piston reset spring (17), when the second synchronous piston (14) does not enter stop piston hole (20), and venting rocking arm is under (6) be in the state not contacting releasing cam (3), the second location platform (15) that wafts is all contact with the plane of orientation (24) in venting rocking arm (6), thus the second synchronous piston hole (25) is overlapped with the center line of the stop piston hole (20) in second row valve rocker (7), venting rocking arm (6) be provided with the sub-bearing of the 3rd drench and be provided with plane of orientation (24) and the second synchronous piston hole (25), in second synchronous piston hole (25), the second synchronous piston (14) is installed, as long as the second roller bearing in venting rocking arm (6) does not contact with releasing cam (3), plane of orientation (24) is all locate the platform that wafts (13) and second to locate the platform that wafts (15) contact with first, and the center line making the first synchronous piston hole (21) and the second synchronous piston hole (25) and hinder shelves piston hole (20) overlaps.
In Fig. 3, the effect of the second exhaust cam (4) is: make second row valve rocker (7) and adjustment screw (19) open exhaust valve when exhaust stroke by driving second roller bearing (35).
In Fig. 4, the effect of the first exhaust cam (2) is: make first row valve rocker (5) and adjustment screw (22) open exhaust valve when exhaust stroke by driving first roller bearing (33).
In Fig. 5, when releasing cam (3) does not contact with three rollers bearing (34), be arranged on the retaining spring (26) in cylinder head (23) plane of orientation (24) of rocking arm of exitting (8) to be popped up and the platform (13) and locate the platform that wafts (15) and contact of wafing with location, thus realize the first synchronous piston hole (21), the second synchronous piston hole (25), stop that the center line of piston hole (20) overlaps.
In Fig. 6, machine oil pipe (32) is communicated with hollow oil duct (12), the A interface of solenoid valve (27), the oil outlet of electronic oil pump (36) simultaneously, and a pressure maintaining valve installed by machine oil pipe; During electromagnetic valve coil (30) energising, spool (29) is in the A interface of closed solenoid valve and the position of B interface, during electromagnetic valve coil (30) power-off, spool (29) is in the position making solenoid valve A orifice B interface under the effect of valve core reseting spring (28), and in good time slow control circuit (31) is switched on or switched off the power circuit of electromagnetic valve coil (30) and the power circuit of electronic oil pump (36) according to the intention of motoring condition and driver.
Working procedure of the present invention:
1. in automobile running, deceleration instruction is not sent driver, or automobile is in neutral gear, or clutch is when being in the state not completing combination, slow control circuit (31) disconnects the power circuit of electromagnetic valve coil (30) and the power circuit of electronic oil pump (36), spool (29) is in the position making solenoid valve A orifice B interface under the effect of valve core reseting spring (28), the machine oil in solenoid valve (27) and in machine oil pipe (32) is caused to be back to engine sump tank by B interface, make do not have oil pressure to act on timing piston (10), stop that the second synchronous piston (14) interception is stopping outside piston hole (20) by piston (18) under the effect stopping piston reset spring (17), meanwhile the first synchronous piston (11) is also tackled outside the second synchronous piston hole (25) by the second synchronous piston (14), owing to stopping the limited length of piston reset spring (17), stop that piston (18) can't enter the second synchronous piston hole (25), therefore the second synchronous piston (14) also can not enter the first synchronous piston hole (21), now, first row valve rocker (5), second row valve rocker (7) shake under respective corresponding actuated by cams, first location waft platform (13) and second location waft platform (15) effect under, also make venting rocking arm (6) in company with shake, make the first synchronous piston hole (21), the second synchronous piston hole (25) and stop that the center line of piston hole (20) overlaps, when third valve roller bearing (35) is under the driving of releasing cam (3), plane of orientation (24) and first is located the platform that wafts (13) and second and is located the platform that wafts (15) and disengage, do alone invalid shake, after releasing cam (3) and third valve roller bearing (35) disengage, venting rocking arm (6) is under the effect of retaining spring (26), make plane of orientation (24) keep locate with first the platform that wafts (13) and second to locate the platform that wafts (15) and contact also adjoint first row valve rocker (5), second row valve rocker (7) shakes, thus make the first synchronous piston hole (21), the center line of the second synchronous piston hole (25) and stop piston hole (20) overlaps.
2. send deceleration instruction when slow control circuit (31) detects driver, motor has stopped fuel oil supply simultaneously, automobile is not again after neutral gear and clutch are in the state combined completely, slow control circuit (31) connects the power circuit of electromagnetic valve coil (30) and the power circuit of electronic oil pump (36) immediately, spool (29) overcomes the elastic force of valve core reseting spring (28) under the effect of electromagnetic force, be in the position of closed solenoid valve A interface and B interface, machine oil is pumped into machine oil pipe (32) and enters hollow oil duct (12) by electronic oil pump (36), enter oil duct (16) and the first synchronous piston hole (21) through oil hole (9) again and promote timing piston (10), timing piston (10) promotes again the first synchronous piston (11), in the first synchronous piston hole (21), when the center line of the second synchronous piston hole (25) and stop piston hole (20) overlaps, first synchronous piston (11) is pushed the second synchronous piston hole (25), promote the second synchronous piston (14) to make it to enter stop piston hole (20) simultaneously simultaneously, promote again to stop piston (18) and compression stop piston reset spring (17) simultaneously, so far completed and made first row valve rocker (5), venting rocking arm (6), second row valve rocker (7) combine shake operation, first row valve rocker (5) now, venting rocking arm (6), second row valve rocker (7) is both in the first exhaust cam (2), synchronously shake under the driving of the second exhaust cam (4) and opened exhaust valve actuation in engine exhaust strokes, synchronously can shake under the driving of releasing cam (3) again, complete to be at piston and pressurized air released action outside cylinder close to opening exhaust valve during compression stroke near top dead center, make piston not air push by compression when expansion stroke, automobile is now in inertia running state, and motor drives running by automobile driving wheel by transmission system, and motor becomes air compressor, by pressurized air to consume the inertia kinetic energy of automobile, for ensureing that transshipping phenomenon and ensureing that the oil pressure in machine oil pipe (32) is stablized does not appear in electronic oil pump (33), when oil pressure in machine oil pipe (32) is higher than setting engine oil pressure, pressure maintaining valve (34) immediate unlock is to engine sump tank draining.
3. cancel deceleration instruction when slow control circuit (31) detects driver, or recovered to motor supply fuel oil, or automobile is in neutral gear, or after clutch is in the state not completing combination, slow control circuit (31) disconnects the power circuit of electromagnetic valve coil (30) and the power circuit of electronic oil pump (36) immediately, spool (29) is in the position making solenoid valve A orifice B interface immediately under the effect of Returnning spring (28), cause being back to engine sump tank with the machine oil in machine oil pipe (32) by B interface in solenoid valve (27), make do not have oil pressure to act on timing piston (10), subsequently when third valve roller bearing (34) does not contact with releasing cam (3), stop that the second synchronous piston (14) is released by piston (18) under the effect stopping piston reset spring (17) and stop piston hole (20), meanwhile, first synchronous piston (11) is also released the second synchronous piston hole (25) by the second synchronous piston (14), owing to stopping the limited length of piston reset spring (17), stop that piston (18) can't enter the second synchronous piston hole (25), therefore the second synchronous piston (14) also can not enter the first synchronous piston hole (21), after this, as long as third valve roller bearing (34) does not contact with releasing cam (3), first row valve rocker (5), second row valve rocker (7) shakes under respective corresponding actuated by cams, make the first synchronous piston hole (21), second synchronous piston hole (25) and stop piston hole (20) center line overlap first location waft platform (13) and second locate waft platform (15) effect under, also make venting rocking arm (6) in company with shaking, make the first synchronous piston hole (21), the center line of the second synchronous piston hole (25) and stop piston hole (20) overlaps, when third valve roller bearing (34) is under the driving of releasing cam (3), locating platform (24) is namely located the platform that wafts (13) and second and is located the platform that wafts (15) and disengage with first, do alone invalid shake, after releasing cam (3) and venting rocking arm (6) disengage, venting rocking arm (6) is under the effect of retaining spring (26), plane of orientation (24) is kept and first locates the platform that wafts (13) and second and locate the platform that wafts (15) and contact, thus make the first synchronous piston hole (21), the center line of the second synchronous piston hole (25) and stop piston hole (20) overlaps.
Claims (1)
1. the slow system of motor car engine compression type, by cylinder head, camshaft, first row valve rocker, second row valve rocker, venting rocking arm, the venting retaining spring of rocking arm, the first roller bearing, the second roller bearing, three rollers bearing, timing piston, the first synchronous piston, the second synchronous piston, stop piston, stop piston reset spring, pitman arm shaft, machine oil pipe, solenoid valve, electronic oil pump, pressure maintaining valve, slow control circuit forms; It is characterized in that: camshaft is provided with the first exhaust cam, the second exhaust cam, releasing cam; First row valve rocker is provided with the first roller bearing and is provided with the first location and to waft platform, oil duct, the first synchronous piston hole, first synchronous piston hole is communicated with the oil hole on oil duct and pitman arm shaft, is provided with timing piston and the first synchronous piston in the first synchronous piston hole; Second row valve rocker is provided with the second roller bearing and be provided with the second location waft platform, stop piston hole, stop in piston hole to be provided with and stop piston and stop piston reset spring; Venting rocking arm be provided with three rollers bearing and be provided with plane of orientation, the second synchronous piston hole, in the second synchronous piston hole, the second synchronous piston being installed; Between venting rocking arm and cylinder head, retaining spring is installed, one end of retaining spring heads on venting rocking arm, the other end heads on cylinder head; First row valve rocker, second row valve rocker, venting rocking arm are all arranged on pitman arm shaft, install and coordinate for Spielpassung; When engine exhaust strokes, first is vented actuated by cams first roller bearing, the second exhaust actuated by cams second Roller Shaft; Start to drive three rollers bearing at the close at the end releasing cam of engine compression strokes and shortly disengage with three rollers bearing after expansion stroke starts; Machine oil pipe is communicated with the A interface of hollow oil duct, solenoid valve, the oil outlet of electronic oil pump, machine oil pipe has been installed a pressure maintaining valve; Slowly being turned on or off of the power circuit of electromagnetic valve coil and the power circuit of electronic oil pump by control circui processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510491515.0A CN105179091B (en) | 2015-08-10 | 2015-08-10 | The slow system of automobile engine compression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510491515.0A CN105179091B (en) | 2015-08-10 | 2015-08-10 | The slow system of automobile engine compression |
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| Publication Number | Publication Date |
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| CN105179091A true CN105179091A (en) | 2015-12-23 |
| CN105179091B CN105179091B (en) | 2017-12-19 |
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| CN201510491515.0A Active CN105179091B (en) | 2015-08-10 | 2015-08-10 | The slow system of automobile engine compression |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321701B1 (en) * | 1997-11-04 | 2001-11-27 | Diesel Engine Retarders, Inc. | Lost motion valve actuation system |
| JP2001355419A (en) * | 2000-06-15 | 2001-12-26 | Jidosha Buhin Kogyo Co Ltd | Engine brake device |
| US20030111044A1 (en) * | 2001-12-17 | 2003-06-19 | Cotton Clifford E. | Method and apparatus for operating an internal combustion engine exhaust valve for braking |
| US20040187842A1 (en) * | 2002-12-23 | 2004-09-30 | Zhou Yang | Engine braking methods and apparatus |
| CN102787880A (en) * | 2011-05-18 | 2012-11-21 | 上海尤顺汽车部件有限公司 | Method and device for manufacturing rocking arm with main piston and auxiliary piston |
| CN202611787U (en) * | 2012-05-09 | 2012-12-19 | 上海尤顺汽车部件有限公司 | Fixed-chain-type special rocker arm brake device |
| CN203097985U (en) * | 2013-01-09 | 2013-07-31 | 上海尤顺汽车部件有限公司 | Engine braking device with special cam for braking single valve |
| CN205013133U (en) * | 2015-08-10 | 2016-02-03 | 莫嘉林 | Automobile engine compression is fast system slowly |
-
2015
- 2015-08-10 CN CN201510491515.0A patent/CN105179091B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321701B1 (en) * | 1997-11-04 | 2001-11-27 | Diesel Engine Retarders, Inc. | Lost motion valve actuation system |
| JP2001355419A (en) * | 2000-06-15 | 2001-12-26 | Jidosha Buhin Kogyo Co Ltd | Engine brake device |
| US20030111044A1 (en) * | 2001-12-17 | 2003-06-19 | Cotton Clifford E. | Method and apparatus for operating an internal combustion engine exhaust valve for braking |
| US20040187842A1 (en) * | 2002-12-23 | 2004-09-30 | Zhou Yang | Engine braking methods and apparatus |
| CN102787880A (en) * | 2011-05-18 | 2012-11-21 | 上海尤顺汽车部件有限公司 | Method and device for manufacturing rocking arm with main piston and auxiliary piston |
| CN202611787U (en) * | 2012-05-09 | 2012-12-19 | 上海尤顺汽车部件有限公司 | Fixed-chain-type special rocker arm brake device |
| CN203097985U (en) * | 2013-01-09 | 2013-07-31 | 上海尤顺汽车部件有限公司 | Engine braking device with special cam for braking single valve |
| CN205013133U (en) * | 2015-08-10 | 2016-02-03 | 莫嘉林 | Automobile engine compression is fast system slowly |
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| CN105179091B (en) | 2017-12-19 |
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