CN203248218U - Engine retarder - Google Patents
Engine retarder Download PDFInfo
- Publication number
- CN203248218U CN203248218U CN201320287774.8U CN201320287774U CN203248218U CN 203248218 U CN203248218 U CN 203248218U CN 201320287774 U CN201320287774 U CN 201320287774U CN 203248218 U CN203248218 U CN 203248218U
- Authority
- CN
- China
- Prior art keywords
- valve
- tappet
- cam
- rocker
- cam wheel
- 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
Links
Images
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
The utility model relates to an engine retarder. The engine retarder comprises a tappet, a cam, a push rod, a guide pipe, a valve and a valve rocker, wherein the cam is located below the tappet and used for driving the tappet to move up and down, the push rod is vertically installed on the tappet, the guide pipe is installed on a cylinder head, the valve is installed in the guide pipe in a sliding mode, and the valve rocker is installed in a rotatable mode through a rotating shaft. One end of the valve rocker is connected to the top end of the push rod in a rotatable mode. The other end of the valve rocker is located over the valve. A spring seat is installed on the upper portion of the valve. A valve spring is installed on the valve in an inserted mode, and the two ends of the valve spring are fixed between the spring seat and the guide pipe in a clamped mode respectively. The engine retarder further comprises a screwdown gear which presses the valve rocker downwards when the cam rotates to an angular interval district. When the screwdown gear is used for enabling the valve to return after the valve is opened, the valve is retained by the valve rocker, the valve cannot be closed completely, therefore, a throttling gap is formed, and the retardance function is achieved; in addition, the angle which the cam is supported at for rotation can be automatically adjusted according to engine speeds, and therefore the engine retarder has the good retardance function under the conditions of various engine speeds.
Description
Technical field
The utility model relates to technical field of internal combustion engines, is specifically related to a kind of slowing down speed of engine.
Background technique
At the beginning of 2012, Ministry of Industry and Information puts into effect " strengthen vehicle＜bulletin about the big-and-middle-sized passenger-cargo carriage security technical capability of further raising〉management and register the notice of management work ", " Dangerous Goods Transport car, gross mass should be equipped retarder or other complemental brake systems greater than 12 tons lorry "." from 1 day March in 2012, the Dangerous Goods Transport car of new typing and gross mass all should meet above requirement greater than 12 tons passenger vehicle and lorry; From 1 day September in 2012, all should meet above requirement in Dangerous Goods Transport car, the gross mass of producing greater than 12 tons passenger vehicle and lorry ".
With respect to electric eddy current retarder and hydrodynamic retarder, slowing down speed of engine has can keep thermal equilibrium, can work long hours, be particularly suitable for long apart from down hill braking, braking force without thermal decay, little, lightweight, the easy installation of its volume can not increase complete vehicle weight and is contained in engine interior in addition, does not affect the car load general arrangement.
The slowing down speed of engine of present domestic use all is by oil circuit control, its structure relative complex, and reliability is relatively relatively poor.
Summary of the invention
The utility model provides a kind of slowing down speed of engine by cam control valve throttling aperture continuous variable in order to overcome the deficiency of above technology.
The technological scheme that its technical problem that overcomes the utility model adopts is:
This slowing down speed of engine, comprise tappet, be positioned at the tappet below and be used for driving the cam that tappet moves up and down, vertically be installed on the push rod on the tappet, be installed on the conduit on the cylinder head, the valve rocker that is slidingly mounted on the valve in the conduit and rotatably installs by rotating shaft, one end of described valve rocker is rotationally connected with the top of push rod, the other end of described rocking arm be positioned at valve directly over, described valve top is equipped with spring seat, valve spring is plugged on the valve and its two ends are fastened in respectively between spring seat and the conduit, comprises that also one presses the screwdown gear of swing arm downwards when cam rotates to the angular interval interval.
Above-mentioned screwdown gear comprises the supporting frame that is fixed on the cylinder cap, be installed on stepper motor on the supporting frame, be installed on the supporting cam wheel on the stepper motor output shaft, described supporting cam wheel did not contact with valve when the little diametric plane of described supporting cam wheel was positioned at the below, and described supporting cam wheel pressed swing arm downwards when the big diametral plane of supporting cam wheel was positioned at the below.
The beneficial effects of the utility model are: behind valve opening, when by screwdown gear valve being returned, propped up by the valve swing arm, can not close fully, form throttle clearance, realize retarded acting, and can be according to engine speed, automatically regulate the angle of supporting cam wheel rotation, thereby realize all having higher retarded acting under the various speed conditions.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is supporting cam wheel of the present utility model position structure for amplifying schematic diagram;
Fig. 3 is that the utility model valve begins the opening state structural representation;
Fig. 4 is the utility model valve full-gear structural representation;
Fig. 5 is the utility model valve throttling gap state structural representation;
Fig. 6 is supporting cam wheel position structure for amplifying schematic diagram among Fig. 5;
Fig. 7 is valve position structure for amplifying schematic diagram among Fig. 5;
Among the figure, 1. rotating shaft 2. valve swing arms 3. supporting cam wheels 4. stepper motors 5. supporting frames 6. spring seats 7. valve spring 8. valves 9. throttle butterfly valves 10. cams 11. tappets.
Embodiment
Be described further below in conjunction with accompanying drawing 1 to 7 pairs of the utility model of accompanying drawing.
1. this slowing down speed of engine as shown in Figure 1, comprise tappet 11, be positioned at tappet 11 belows and be used for driving the cam 10 that tappet 11 moves up and down, vertically be installed on the push rod on the tappet 11, be installed on the conduit on the cylinder head, the valve rocker 2 that is slidingly mounted on the valve 9 in the conduit and rotatably installs by rotating shaft 1, one end of described valve rocker 2 is rotationally connected with the top of push rod, the other end of described rocking arm 2 be positioned at valve 8 directly over, described valve 8 tops are equipped with spring seat 6, valve spring 7 is plugged on the valve 8 and its two ends are fastened in respectively between spring seat 6 and the conduit, comprises that also one presses the screwdown gear of swing arm 2 downwards when cam 10 rotates to the angular interval interval.Above-mentioned screwdown gear comprises the supporting frame 5 that is fixed on the cylinder cap, be installed on stepper motor 4 on the supporting frame 5, be installed on the supporting cam wheel 3 on stepper motor 4 output shafts, described supporting cam wheel 3 did not contact with valve 8 when the little diametric plane of described supporting cam wheel 3 was positioned at the below, and described supporting cam wheel 3 pressed swing arm 2 downwards when the big diametral plane of supporting cam wheel 3 was positioned at the below.As shown in Figure 2, in the situation that not slow braking, supporting cam wheel 3 is under the driving of stepper motor, and there is slit S over against the below in little diametric plane between valve swing arm 2 and the supporting cam wheel 3, and at this moment, valve 8 can normally be closed.Shown in accompanying drawing 3 and accompanying drawing 4, when motor is under the slow state of braking, cam 10 drives valve swing arm 2 to lower swing by tappet 11 and push rod, make that gap S1 to occur at valve 8 and cylinder cap be that cam 10 is positioned at time corresponding to angular interval to S2, drive supporting cam wheel 3 rotations according to the automatic control step motor 4 of engine speed, if once rotation can't reach just several times rotation of requirement, make the angle of swing α that finally reaches suitable, the big diametral plane of supporting cam wheel 3 is over against the projection of valve swing arm 2 at this moment, when valve rises again, valve 8 supported cams 3 prop up, this moment is such as accompanying drawing 5, accompanying drawing 6, shown in the accompanying drawing 7 so that valve 8 descends one apart from S α with respect to the complete closure state, a corresponding valve throttling gap of formation S0.Engine speed changes, and the gap is regulated automatically, in compression stroke and power stroke, can produce very large throttle resistance and reach slow effect.When engine speed changes, stepper motor 4 can be regulated the angle of swing α of supporting cam wheel 3 automatically, so that valve throttling gap S0 can provide best retarded acting.
For the slow process of three strokes, when needs are braked slowly, the position of motor automatic decision cam, when cam 10 enters described angular interval, stepper motor 4 drives supporting cam wheel 3 rotations, and before cam 10 leaves angular interval, stop the rotation, if once the angle of rotation does not reach the gap requirement of corresponding valve opening, again automatically regulate next time.Exhaust valve just can't cut out fully like this, thereby so that piston all produces throttle resistance in compression stroke and power stroke.Throttle butterfly valve 9 in the outlet pipe is closed simultaneously, produces throttling action by throttle butterfly valve 9 in exhaust stroke, thereby realizes that motor throttle resistance occurs at three strokes, has realized the effect of engine retardation.
For the slow process of four-stroke, can be in carrying out slow braking process, keep the intake valve complete shut-down, exhaust valve is opened certain throttle clearance according to the present invention, just can realize throttling action also occurring in aspirating stroke, thereby advance to realize that all there is resistance in four strokes of motor, strengthened slow effect.
Claims (2)
1. slowing down speed of engine, it is characterized in that: comprise tappet (11), be positioned at tappet (11) below and be used for driving the cam (10) that tappet (11) moves up and down, vertically be installed on the push rod on the tappet (11), be installed on the conduit on the cylinder head, the valve rocker (2) that is slidingly mounted on the valve (9) in the conduit and rotatably installs by rotating shaft (1), one end of described valve rocker (2) is rotationally connected with the top of push rod, the other end of described rocking arm (2) be positioned at valve (8) directly over, described valve (8) top is equipped with spring seat (6), valve spring (7) is plugged in valve (8) upward and its two ends are fastened in respectively between spring seat (6) and the conduit, comprises that also one presses the screwdown gear of swing arm (2) downwards when cam (10) rotates to the angular interval interval.
2. slowing down speed of engine according to claim 1, it is characterized in that: described screwdown gear comprises the supporting frame (5) that is fixed on the cylinder cap, be installed on stepper motor (4) on the supporting frame (5), be installed on the supporting cam wheel (3) on stepper motor (4) output shaft, described supporting cam wheel (3) did not contact with valve (8) when the little diametric plane of described supporting cam wheel (3) was positioned at the below, and described supporting cam wheel (3) pressed swing arm (2) downwards when the big diametral plane of supporting cam wheel (3) was positioned at the below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320287774.8U CN203248218U (en) | 2013-05-24 | 2013-05-24 | Engine retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320287774.8U CN203248218U (en) | 2013-05-24 | 2013-05-24 | Engine retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203248218U true CN203248218U (en) | 2013-10-23 |
Family
ID=49374663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320287774.8U Expired - Fee Related CN203248218U (en) | 2013-05-24 | 2013-05-24 | Engine retarder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203248218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256091A (en) * | 2013-05-24 | 2013-08-21 | 田丽欣 | Engine retarder |
-
2013
- 2013-05-24 CN CN201320287774.8U patent/CN203248218U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256091A (en) * | 2013-05-24 | 2013-08-21 | 田丽欣 | Engine retarder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8701608B2 (en) | Variable valve lift system for an internal combustion engine | |
| CN108757085B (en) | Variable valve lift structure and control method thereof | |
| CN103256124A (en) | Engine valve control mechanism capable of stopping cylinders by turns | |
| CN204386688U (en) | The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve | |
| CN204082245U (en) | The electrodeless variable valve gear of a kind of motor | |
| CN103266928B (en) | Two-in-one mechanism of continuous variable valve stroke and valve timing of automobile engine | |
| CN103256091A (en) | Engine retarder | |
| CN102705027A (en) | Valve stroke variable adjusting system | |
| CN203248218U (en) | Engine retarder | |
| CN103470324B (en) | Engine Duan Gang mechanism | |
| CN105909332A (en) | Stepless valve rocker mechanism with variable lift and corresponding valve device | |
| CN102748141B (en) | Inlet valve control mechanism of shifter cylinder in multi-cylinder engine cylinder deactivation oil saving system | |
| CN204140149U (en) | A kind of engine valve actuating mechanism and motor | |
| CN102966391B (en) | Swinging arm mechanism controlled by using double cams | |
| CN202970840U (en) | Gear rack rocker arm type variable valve lift mechanism of engine | |
| Chandras et al. | Effect of intake valve profile modulation on passenger car fuel consumption | |
| CN204283544U (en) | A kind of continuous variable valve stroke mechanism | |
| CN203239463U (en) | Valve control mechanism of in-turn cylinder deactivation engine | |
| CN203362251U (en) | Automobile engine continuous variable valve lift and continuous variable valve timing two-in-one mechanism | |
| CN102943699B (en) | Cam rocker arm mechanism for internal combustion engine | |
| CN204591386U (en) | Engine valve changeable controller | |
| CN208089367U (en) | A kind of engine valve timing regulating device | |
| CN204532453U (en) | engine valve variable timing and lift control system | |
| CN204140210U (en) | electric control valve and control system thereof | |
| CN201705407U (en) | Variable-gas-distribution-phase and variable-gas-valve-lift-range control system of automobile engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20210524 |