• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An automatic hydraulic tappet for taking up clearance between a cam and a valve stem in an internal combustion engine with an overhead camshaft can rapidly attain its optimum operational efficiency when the engine is started, since the supply conduit, which supplies engine lubricating oil to an annular groove communicating with a chamber between two tappet members, is provided with a sump which is lower than the groove and, therefore, acts as an oil reservoir when the engine is stopped.
    公开号:SU971113A3
    申请号:SU792803899
    申请日:1979-08-28
    公开日:1982-10-30
    发明作者:Лампреди Аурелио；Леони Альдо；Иоли Луиджи
    申请人:Фиат Ауто С.П.А.(Фирма)；
    IPC主号:
    专利说明:


    FIELD OF THE INVENTION The invention relates to engine-building and can be used in gas distribution mechanisms of internal combustion engines.
    Known hydraulic pushers with automatic adjustment of the gap between the cam and the valve stem, mounted in the cylindrical bore of the cylinder head internal combustion engine with the upper position of the camshaft, containing two caps located one. inside the other with the possibility of mutual axial movement and displacement jj with respect to the bore, the inner cap is mounted on the valve stem, and the upper end walls of the caps form a hydraulic chamber in which there is a 20 non-return valve made in the form of an elastic flat disk engine lubrication systems, annular nipple, covering the outer cap and channels 26
    supplying oil to the hydraulic chamber
    However, the well-known hydraulic pushers have low efficiency: work when re-starting the engine.
    The purpose of the invention is to increase the efficiency at engine start.
    This is achieved by the fact that the pusher is provided with a sump located in the cylinder head below the annular pipe and communicated with the latter and with the oil supply pipeline.
    Figure 1 shows one embodiment of a hydraulic pusher; Fig. 2 shows another embodiment of a hydraulic pusher.
    权利要求:
    Claims (1)
    [1]
    Hydraulic pusher with automatic adjustment of the gap between the cam and the valve stem is installed in the cylindrical bore 1 of the cylinder head 2 of the internal combustion engine (two.) With the top 39 of the camshaft 3 The pusher contains two caps and 5 | location one inside the other with the possibility of reciprocal axial movement relative to the bore. The outer cap 4 comprises an upper end face 6 and a cylindrical skirt 7. The inner cap 5 is axially displaced inside the first cap k and also contains an upper end wall 8 which rests on the valve stem 9 and a cylindrical body of the skirt 10. Top end walls 6 and 8 of the caps form a hydraulic chamber 11, in which the leaf spring is located 12, which pushes the cap walls apart, and an elastic disk 13 mounted between the spring 12 and the end wall 8 of the cap 5, acting as a back to The spring and the disk are fastened with a rivet 14 on the end wall 8 of the cap 5. The elastic ring 15 placed in the groove 1b, made on the inner surface of the skirt 7 of the cap k, is a stop to prevent disengagement of the caps 4 work time In the cylinder head 2, there is a pipeline 17 for supplying oil from a lubrication system two, which communicates with a settling basin 18 located below the annular nozzle 19 enclosing the outer cap, and the settling nozzle 18 communicates with the annular nozzle 19 by means of an inclined channel 20. The annular groove 21 is formed on the outer the surface of the skirt 10 of the inner cap 5 and communicates through the channels 22 with the hydraulic chamber 11, and through the radial openings 23 with the annular nozzle 19. Another embodiment of the pusher (Figure 2} differs from the above only by the fact that in a shallow cylindrical recess 2k, made on the outer surface of the end wall 6 of the outer cap k, a wear-resistant lining 25 is extended, which, when the pusher operates, contacts the cam with the cam, besides, there is an opening 26 in the wall to remove air and foam from the hydraulic chamber when the pusher starts to work, thereby accelerating and facilitating the filling of the chamber 11 with oil when the engine is started. Hydraulic pusher works as follows. After each period of operation of the internal combustion engine, the oil flows from the chamber 11 to the adjacent settling tank 18, which acts as a storage tank, reducing the time taken for the pusher to achieve optimal operating efficiency when the engine is restarted. Claims of the invention Hydraulic pusher with automatic adjustment of the gap between the cam and the valve stem, mounted in a cylindrical bore of the cylinder head of an internal combustion engine with a top camshaft, containing two caps located one inside the other with the possibility of mutual axial movement and displacement relative to the bore, and the inner cap installed on the valve stem, and the upper end walls of the caps form a hydraulic chamber in which A non-return valve, made in the form of an elastic flat disc, oil supply pipe from the engine lubrication system, an annular nipple covering the outer cap, and channels for supplying oil to the hydraulic chamber, which is characterized by the fact that, in order to increase the efficiency of engine start, the pusher is provided with a sump located in the cylinder head below the annular pipe and communicated with the latter and with the oil supply pipeline. Sources of information taken into account during the examination 1. U.S. Patent No. 3,728,990, Cl. F 01 L 1/2. publish 1973.
    Fi7.1
    类似技术:
    公开号 | 公开日 | 专利标题
    SU971113A3|1982-10-30|Hydraulic tappet
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    US3509858A|1970-05-05|Overhead cam valve lifter
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    US20050061275A1|2005-03-24|Deactivation hydraulic valve lifter having a pressurized oil groove
    US3799129A|1974-03-26|Hydraulic lash adjuster oil metering means
    JPS5619451B2|1981-05-07|
    US3704696A|1972-12-05|Hydraulic valve lifter
    US3572299A|1971-03-23|Valve-actuating train for machinery having a cyclicly operated poppet valve
    US5239952A|1993-08-31|Valve actuating apparatus
    US3448730A|1969-06-10|Hydraulic valve lifter
    US4656976A|1987-04-14|Hydraulic rocker arm
    US4462364A|1984-07-31|Hydraulic lash adjuster
    US4502428A|1985-03-05|Lash adjuster with follower body retainer
    JPH0225010B2|1990-05-31|
    US4481919A|1984-11-13|Intake/exhaust valve assembly for an internal combustion engine
    US5680838A|1997-10-28|Swivel foot lash adjuster
    US5673657A|1997-10-07|Direct-acting hydraulic tappet with roller follower
    US4635593A|1987-01-13|Hydraulic valve lifter
    GB1241634A|1971-08-04|Valve tappet for engines having an overhead camshaft
    US3516393A|1970-06-23|Anti-pump-up tappet
    US2676579A|1954-04-27|Hydraulic adjuster for engine valves
    GB1496860A|1978-01-05|Hydraulic lash adjuster for overhead camshaft internal combustion engines
    同族专利:
    公开号 | 公开日
    GB2034853B|1983-05-11|
    FR2441719B1|1986-04-25|
    JPS5572619A|1980-05-31|
    FR2441719A1|1980-06-13|
    IT7853889V0|1978-11-15|
    US4279226A|1981-07-21|
    GB2034853A|1980-06-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4209442A1|1992-03-24|1993-09-30|Schaeffler Waelzlager Kg|Tappet with hydraulic valve clearance compensation|
    RU2551451C2|2013-04-26|2015-05-27|Александр Алексеевич Семенов|Gas-distributing mechanism of profile type of internal combustion engine|GB564507A|1941-07-24|1944-10-02|Eaton Mfg Co|Improvements in or relating to valve tappet constructions|
    GB831984A|1956-11-07|1960-04-06|Engineering Res & Applic Ltd|Improvements in or relating to self adjusting tappets for internal combustion enginevalve gear|
    FR1251366A|1959-12-08|1961-01-20|Improvements to automatic adjustment devices for cam-controlled valve clearance, in particular for internal combustion engines|
    FR2006542A1|1968-04-19|1969-12-26|Motomak|
    GB1241634A|1968-04-19|1971-08-04|Motomak|Valve tappet for engines having an overhead camshaft|
    DE1808000A1|1968-11-09|1970-05-27|Richard Kuechen Sen|Hydraulic, automatically working valve clearance compensation device|
    DE1912046A1|1969-03-10|1970-09-17|Guido Juergen Dipl Ing|Backlash compensation device, especially for valve drives of internal combustion engines|
    US3728990A|1970-12-22|1973-04-24|Fiaj Societa Per Azioni|Hydraulic tappets for internal combustion engines|
    US3658038A|1971-01-04|1972-04-25|Johnson Products Inc|Tappet for overhead camshaft engine|DE3006644C2|1980-02-22|1991-07-25|Motomak Motorenbau, Maschinen- U. Werkzeugfabrik, Konstruktionen Gmbh, 8070 Ingolstadt, De|
    IT1129888B|1980-11-21|1986-06-11|Riv Officine Di Villar Perosa|HYDRAULIC TAPPETS WITH AUTOMATIC RESUME OF GAME FOR ENDOTHERMAL ENGINES|
    US4463713A|1981-09-02|1984-08-07|Riv-Skf Officine Di Villar Perosa S.P.A.|Hydraulic tappet with automatic taking up of the clearance for endothermic engines|
    JPS5848910U|1981-09-29|1983-04-02|
    JPH0114723Y2|1982-12-01|1989-04-28|
    FR2550273B1|1983-08-05|1987-11-06|Peugeot|VALVE OPERATING DEVICE FOR VARIABLE DISTRIBUTION OF AN INTERNAL COMBUSTION ENGINE|
    JPS60219407A|1984-04-13|1985-11-02|Honda Motor Co Ltd|Oil hydraulic tappet device of internal-combustion engine|
    IT1179734B|1984-07-16|1987-09-16|Riv Officine Di Villar Perosa|WATERPROOF WATER TAPPET FOR THE CONTROL OF THE MOTOR OF A VALVE OF AN ENDOTHERMAL MOTOR|
    IT8453964V0|1984-10-25|1984-10-25|Fiat Auto Spa|HYDRAULIC VALVE IN PARTICULAR FOR A HYDRAULIC TAPPET|
    JPH0330514U|1989-08-02|1991-03-26|
    GB2237858A|1989-11-11|1991-05-15|Gen Motors Luxembourg Operatio|Valve-lash adjustment system.|
    DE4124484C1|1991-07-24|1993-01-14|Fa. Carl Freudenberg, 6940 Weinheim, De|
    US5320074A|1993-06-17|1994-06-14|Sealed Power Technologies Limited Partnership|Direct acting hydraulic tappet|
    IT1279050B1|1995-10-27|1997-12-04|Eaton Automotive Spa|DIRECT ACTING HYDRAULIC PUNTERS FITTED WITH A ROLL FOR CONTACT WITH THE CAM OF THE CAMSHAFT OF AN INTERNAL COMBUSTION ENGINE|
    IT1302651B1|1998-10-13|2000-09-29|Eaton Automotive Spa|HYDRAULIC TAPPETS WITH CONTROLLED HEIGHT LOSS.|
    FR3063307B1|2017-02-28|2019-03-29|MCE 5 Development|PRESS DEVICE FOR EXERCISING A HOLDING EFFORT ON A TRANSMISSION DEVICE AND MOTOR PROVIDED WITH SUCH A DEVICE.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT7853889U|IT7853889V0|1978-11-15|1978-11-15|HYDRAULIC PUNTERS WITH AUTOMATIC BACKLASH FOR INTERNAL COMBUSTION ENGINES WITH CAMSHAFTS IN THE HEAD|
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