• 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:
    Device for pressure pulse generator comprising a cylinder (2), a body (9) connected to the cylinder (2), a channel (15) leading from the cylinder (2) to the entry depression LP, a pressure circuit with a channel (4) leading to the cylinder (2) from the pressure source HP, an actuator piston (3) displaceably arranged in the cylinder (2), a controllable valve body (5) arranged in the channel (4) for opening or closing a pressure fl uid fl desert in the channel (4), an electrical element (7) for control of the valve body (5), a valve body (8) arranged at or in the channel (4) for opening or closing the channel (4). The second valve body (8) is a connecting element fixed to the actuator piston (3). (Figl)
    公开号:SE1100435A1
    申请号:SE1100435
    申请日:2011-06-03
    公开日:2012-12-04
    发明作者:Mats Hedman
    申请人:Ase Alternative Solar Energy Engine Ab；
    IPC主号:
    专利说明:

    40 45 50 55 2 valve lift, i.e. the movement of the actuator piston and thus the motor valve that takes place. During the described process for initiating the movement of the actuator piston and at least during a substantial part of the continued actuation of the actuator piston towards its second position, the away position, the first valve body is closed for evacuating pressure from the cylinder.
    The object is also met with a method for the pressure pulse generator defined in the preamble of claims 1 and 2, characterized in that upon activation of the electrical element the first valve body is displaced to a position where it keeps a first channel closed and a second channel open and a third channel closed at the same time the second valve body keeps the second channel open.
    A hydraulic locking function has been introduced which means that the actuator piston and thus the motor valve can be kept in its second position, the away position, for a selectively long time. Said third channel is closed for evacuation of hydraulic fluid which, via passage of a non-return valve, fills a space created at the surface of the second valve body and when it is moved to its distal turning position, the valve body with associated actuator piston is locked in this position. When the electrical element is deactivated, the first valve body will return to its initial position, said third channel being opened for evacuation of hydraulic fluid and the second valve body with associated actuator piston can be returned to its first position, the home position.
    The object of the invention is also satisfied with a device of a pressure pulse generator according to claim 3, characterized in that the second valve body consists of the actuator piston pin which is fixedly connected to the actuator piston. In the initial position, the home position, where the second valve body is open for a pressure fl uid fl fate, the first valve body opens for a pressure fl uid fl fate which results, by the pressure fl uiden acting against the actuator piston, in a displacement of the actuator piston, in a cylinder corresponding thereto and so that after some pre-movement it closes the pressure id uid fl fate which moves the actuator piston. It is thus a certain length of the actuator piston for displacement from a given home position that determines the length of the pressure pulse. It is an electro-element-controlled valve body, the first valve body, which is controlled to open for a flow of pressure fl uid and thereby initiate a pressure pulse which is cut off mechanically by the second valve body after a certain determined for fl discharge from the home position. The length of the pressure pulse is the distance between the first valve body up to the point where the second valve body cuts off the pressure fl uiden. It will be appreciated that the pulse length becomes stably equal each time the electromagnet is activated. A direct relationship is given between pulse length and valve lift, i.e. the movement of the actuator piston and thus the motor valve that takes place.
    The second valve body, the actuator piston pin, is characterized in that it is narrower in the part which is fixedly connected to the actuator piston. The narrower section begins at or near the actuator piston and has a certain extent towards a coarser portion of the actuator piston pin which is located further from the actuator piston. The said extent of the narrower section, together with the speed of the actuator piston in its movement, determines how long the pressure fl uid should flow into the cylinder and act on the actuator piston. The actuator piston pin runs back and forth in a channel and the coarser part of the actuator piston pin, above the narrower section, has a diameter which is adapted to the diameter of said channel so that the pressure can flow down towards the actuator piston, via the narrower part of the actuator piston pin, but not in the opposite direction. .
    In the home position, the actuator piston is pre-tensioned by a mechanical, or pneumatic spring, which, in the same way as for camshaft-controlled valves, acts to keep the motor valves closed or to return them to the closed position after they have been opened.
    The pressure pulse of pressure fl uid which, according to the above description, acts to open a motor valve is thus counteracted by said spring which acts to close the motor valve 10 15 20 25 30 35 40 45 50 55 3. It is mainly the relationship between opening and closing collars and the length of the pressure pulse at a given pressure in the pressure that determines where the far turning position, the valve lift, of the actuator piston and thus the motor valve occurs.
    In order for the actuator piston to be able to return to its home position, there is an evacuation channel which opens into the roof of the cylinder in which the actuator piston runs.
    When pressure pulses are generated and during actuation of the actuator piston to its remote turning position, this evacuation channel is kept closed. Characteristic of the invention is that the first valve body, at the same time as it is open for fl until the actuator piston, closes for via via the evacuation channel out of the cylinder. When the actuator piston is to return or returns, it is opened to evacuate the pressure fl uid applied for moving the actuator piston and thereby opening the motor valve.
    The second valve body, the actuator piston pin, runs in a channel.
    In the home position of the actuator piston, a second channel connects from this side from the side to the area where the actuator piston pin is tapered. In this second channel the first valve body is positioned so that it can open or close for the purpose of pressure fl uid up to the said tapered part of the actuator piston pin. When the electromagnet is activated, the pressure fl uid opens up to the tapered part and pressure fl uiden fl continues to flow along this tapered part down into the cylinder to the top of the actuator piston and causes it and the associated motor valve to move in an opening movement to supply air for combustion or combustion. . When the actuator piston and motor valve are to return or return to the home position, the electromagnet is deactivated, causing the first valve body to close the connecting second channel so that pressure fl uid can not flow back into the cylinder when the tapered part of the actuator piston up to the actuator piston. When the electrical element is deactivated, it is also opened for evacuation of the pressure fl uid applied to the cylinder to move the actuator piston and thereby open the motor valve.
    The pressure pulse generator according to the invention can be provided with a hydraulic lock which is activated as the electrical element is activated and the first valve body is displaced and the second valve body is displaced to its distal turning position.
    Characteristic is that the displacement of the first valve body caused by the activation of the electrical element closes for fl the fate of hydraulic fluid and that when the electrical element is deactivated it opens for fl fate of hydraulic fluid.
    BRIEF DESCRIPTION OF THE DRAWINGS The figures show an embodiment in which Figs. 1 is a partially cut-away side view of an inventive pulse generator in a first position, the home position, and where FIG. 2 shows the same view in a second position, the away position. Fig. 3 shows the pressure pulse generator equipped with a hydraulic lock in a first position and fi g.4 the same view in a second position.
    DETAILED DESCRIPTION OF THE INVENTION Fig. 1 shows a cylinder head 1 with an inventive pressure pulse generator which forms part of a valve actuator for a 2- or 4-stroke internal combustion engine. Below the cylinder head is a combustion chamber 13. A poppet valve 11 closes to the combustion chamber for discharge to or from the same via a channel 14. A hydraulic circuit 10 which according to the prior art ensures that the poppet valve brakes appropriately at the moment it is to close and close. A cylinder 2 with an actuator piston 3 can be incorporated in the cylinder head or mounted on the cylinder head.
    The pressure pulse generator is located in a body 9 located on the cylinder 2. The pressure pulse generator comprises a cylinder 2 and a displaceable actuator piston 3 in the cylinder 2, a pressure circuit with a channel 4 leading to the cylinder 2, an electroelementically controlled first valve body 5 arranged in the channel 4 for opening, via an opening 6 in the valve body 5, or closing a pressure outlet in channel 4, and a second valve body 8 also present in channel 4 for opening or closing the channel. The valve body 8 consists of a coarser part 8 "and a narrower part 8" "which is fixedly connected to the actuator piston 3 which in turn rests on or is fixedly connected to the shaft of the poppet valve 11. The channel 4 consists of two sub-channels 4" and 4 " "_ Subchannel 4" leads from the side up to subchannel 4 ". The second valve body 8 is displaceable in channel 4 ”. The coarser part 8 "of the valve body 8 has a diameter corresponding to the diameter in channel 4”. The narrower part 8 "" of the valve body 8 has a distance equal to, or longer than, the distance between the intersection of the sub-channels 4 "and 4" "and the mouth of the channel 4 in the cylinder 2. The figure shows the starting position of the motor valve 11 and the actuator piston 3, one end position or master position. In this position the tapered part 8 "" of the second valve body 4 "" is outside the mouth of the sub-channel 4 "" in the sub-channel 4 "and is open for pressure id from flowing through channel 4 into the cylinder 2. It should be mentioned here that the electrical element 7 which activates the first valve body 5 can be directly acting on the valve body as shown for simplicity or indirectly acting with a so-called pilot-slave function. It should also be mentioned here that the term electrical element stands for an element that is activated via a signal from a computer-based control system and then performs a movement. Today, electromagnets are a typical electrical element, but there is an ongoing development that can lead to other solutions corresponding to the function of an electromagnet. This means that when activating the electrical element, a movement takes place from a defined initial position in one direction and when the electrical element is deactivated, the movement is performed in the other direction back to said initial position.
    When the first valve body 5 is activated by activating the electrical element 7 from a high pressure source HP in the duct 4 via the opening 6 of the valve body, the pressure will act against the actuator piston 3 and displace it from the first position, the home position shown in fi g. 1 to the second position, the away position, shown in Fig. 2. The two positions are the end positions of the piston. On the way to the second position, the coarser part 8 ”of the second valve body will be placed in the middle of the sub-channel 4” “mouth in 4” and then close for continued pressure fluid fl in the channel 4.
    To keep the poppet valve closed against the combustion chamber, it is pre-tensioned with its shaft 11 in the direction of the home position via, for example, a mechanical spring 12 or some other type of spring, for example a pneumatic spring. The actuator piston can be fixedly connected to the valve stem as shown in the figures, but can also rest on the prestressed valve shaft in a variant not shown here. Various solutions are conceivable without departing from the invention.
    The cylinder 2 has an evacuation channel 15 for evacuating the pressure fl uid applied to the cylinder when activating the electrical element 7 and accompanying for fl displacing the actuator piston 3. Evacuation takes place to the low pressure source LP and is necessary for the actuator piston to return to the spring 12 by means of the spring 12.
    When the first valve body has opened for fl of pressure fl uid to the cylinder via the channel 4, it has also closed for evacuation to the LP via the channel 15 in accordance with Pig. Said opening for fl fate in channel 4 shall not take place before closing for evacuation to channel 15 but opening shall take place at the earliest at the same time as closing, otherwise there is a risk of loss of pressure fl uid before it may act fully on the actuator piston 3 to fl move it. In a preferred embodiment, there is a purpose-built electronically based control system with suitable software which commands the electrical elements 7 to activate the pressure pulse generators for delivery of pressure pulses used for repeated opening and closing of current outlet and inlet valves 11 to an engine combustion chamber 16 for carrying out the gas exchange. In a preferred embodiment, respective electrical elements 7 are kept activated until the actuator piston 3 has reached its distant turning position before the first valve body 5 opens for evacuation of pressure id uid. The electrical element is deactivated no later than on the way of the actuator piston back to the home position a sufficient amount of pressure fl uid has time to be evacuated so that an unwanted bounce is prevented.
    A pressure pulse is generated which sends the motor valve 11 away from the home position in an opening movement and when the movement by the action of the spring 12 ceases, the motor valve has reached its away position and immediately begins its path back to the home position. The time to leave home and return to this, the duration, can amount to a few milliseconds. Large valve lifts with a short duration lead to the possibility of good gas exchange and high speeds.
    If the pressure pulse generator is provided with the described hydraulic circuit for locking the actuator piston in its away position, the actuator piston cannot begin its return to the home position until the electrical element has been deactivated. The electrical element must be activated in order for the first valve body to be moved from an initial position to and deactivated in order for the first valve body to return to its initial position.
    It should be noted that the pressure pulse generator according to fi g. 1-4 are schematically represented, whereby certain details are assumed to exist even though they are not shown in the fi gures. For example, the principle of the braking effect of the hydraulic circuit when closing the motor valve or that a spring is arranged for returning the first valve body after the electrical element is deactivated is not shown.
    Fig. 3 shows the cylinder head 1 with the pressure pulse generator where the hydraulic circuit 10 has been supplemented to an embodiment preferred for the outlet valves in the application of the present invention in 4-stroke operation and for variable compression of both 2-stroke and 4-stroke engines. In the case of variable compression, a motor valve is not moved but a piston present in the roof of the combustion chamber 13 in the cylinder head 1, which, however, is not shown in the figure.
    The hydraulic circuit is provided with a non-return valve 15 and an opening at a channel 16 in the first valve body 5. When the electrical element 7 is activated, when the first valve body is moved, its opening at the channel 10 for discharge of hydraulic fluid closes out of the circuit 10. As described above, the second valve body is displaced as a result of the surface of the first valve body, whereby hydraulic fluid flows past the non-return valve 15 and fills the space 17 which arises.
    When the actuator piston has reached its away position, the spring 12 cannot return it to the home position due to the hydraulic fluid not being able to find any way out of the space 17. This is caused by the non-return valve together with the first valve body closing out of the space 17 as shown in . 4.
    权利要求:
    Claims (1)
    [1]
    1. 0 15 20 25 30 35 40 45 50 55 6 PATENT REQUIREMENTS. Method for pressure pulse generator where the pressure pulse generator comprises a cylinder (2) a body (9) connected to the cylinder (2) a channel (15) leading from the cylinder (2) to a pressure sink LP a pressure fl circuit with a channel (4) leading to the cylinder (2) from a pressure source HP an actuator piston (3) slidably arranged in the cylinder (2), a controllable valve body (5) arranged in the channel (4) for opening or closing a pressure fl out of the channel (4) g. An electrical element (7) for controlling the valve body (5) h. a valve body (8) arranged at or in the channel (4) for opening or closing the channel (4), characterized in that upon activation of the electric element (7) the valve body (5) is displaced to a position where it keeps duct (15) closed and duct (4) open while the valve body (8) keeps duct (4) open. "° F ° 99.75". A method according to claim 1, wherein the pressure pulse generator also comprises a. A hydraulic circuit (10) with a non-return valve (15) b. A channel (16) for evacuating hydraulic fluid, characterized in that when activating the electrical element (7) the valve body (5) is displaced to a position where it keeps the channel (15) closed and the channel (4) open and the channel (16) closed at the same time as the valve body (8) keeps the channel (4) open .. Device for pressure pulse generator comprising a. (2) b. A body (9) connected to the cylinder (2) c. A channel (15) leading from the cylinder (2) to a pressure drop LP d. A pressure fl circuit with a channel (4) leading to the cylinder (2) ) from a pressure source HP an actuator piston (3) slidably arranged in the cylinder (2) a controllable valve body (5) arranged in the channel (4) for opening or closing a pressure fl out of the channel (4) g. an electrical element (7) for control of the valve body (5) h. a valve body (8) arranged at or in the channel (4) for opening or closing the channel (4), characterized in that the valve body (8) is an element fixedly connected to the actuator piston (3). WS 'Pressure pulse generator according to claim 3, characterized in that the valve body (8) is a pin projecting from the actuator piston (3) into the channel (4). Pressure pulse generator according to Claim 4, characterized in that the valve body (8) projects into a body (9) arranged at the cylinder (2). . Pressure pulse generator according to one of Claims 3, 4, 5, characterized in that the valve body (8) is arranged to open for a pressure output in the channel (4) in the first position of the actuator piston (3). . Pressure pulse generator according to one of Claims 3, 4, 5, 6, characterized in that the valve body (8) is arranged to close off the pressure in the duct (4) in positions between the first and second end positions of the actuator piston (3). Pressure pulse generator according to claim 4, characterized in that the valve body (8) comprises a tapered part which lies in the middle of the channel (4) and opens for pressure flow out through this channel in the actuator piston (3). first end position. Pressure pulse generator according to one of Claims 3, 4, 5, 6, 7, 8, characterized in that it is included in a valve actuator which comprises a motor valve (11) and in that the actuator piston (3) rests on, or is fixedly connected to, the motor valve. Pressure pulse generator according to one of Claims 3, 4, 5, 6, 7, 8, 9, characterized in that the duct (4) leads to a source of HP for the pressure medium and that when the duct is caused to open at the displacement of the valve body (5) the pressure medium will act against the actuator piston (3) in the cylinder (2), the actuator piston will be displaced from its first end position to its second end position.
    类似技术:
    公开号 | 公开日 | 专利标题
    SE1100435A1|2012-12-04|Pressure Pulse Generator
    KR102240989B1|2021-04-15|Aspirated relief valve for a turbocharging system
    KR101010393B1|2011-01-21|A method and device for pressure pulse generation
    JP4657311B2|2011-03-23|Improvement of hydraulically operated valve system for internal combustion engine
    JP2005516144A|2005-06-02|Engine valve actuation system and method using reduced pressure common rail and dedicated engine valve
    JPH09504074A|1997-04-22|Hydraulically actuated valve device
    JP2014177942A|2014-09-25|Device for controlling fluid supply of system
    SE1150976A1|2013-04-22|Actuator
    JP2006502340A|2006-01-19|Internal combustion engine poppet valve and actuator structure
    KR101010415B1|2011-01-21|A device and a method for the generation of pressure pulses
    KR20080079667A|2008-09-01|System and method for hydraulic valve actuation
    SE531265C2|2009-02-03|Method and apparatus for driving a valve to the combustion chamber of an internal combustion engine, and an internal combustion engine
    JP2005201274A|2005-07-28|Fuel injection nozzle
    US5787858A|1998-08-04|Engine brake with controlled valve closing
    JP6017690B2|2016-11-02|Flow control system
    SE527373C2|2006-02-21|Method for generating pressure pulses, pressure pulse generator and one with such a piston motor
    KR20160070138A|2016-06-17|Combustion engine and gas handling system for pneumatic operation of a valve actuator
    JP4476289B2|2010-06-09|Configuration inside the fuel injection system
    JP2000186647A|2000-07-04|Fuel injection valve
    EP3207236B1|2021-04-28|Combustion engine as well as method for engine braking using such a combustion engine
    US20180119583A1|2018-05-03|Actuator for axial displacement of an object
    SE520993C2|2003-09-23|Pressure Pulse Generator
    SE526975C2|2005-11-29|Method for generating pressure pulses, pressure pulse generator and one with such a piston motor
    SE1550460A1|2016-10-17|Actuator for axial displacement of an object
    US6085721A|2000-07-11|Bar engine brake
    同族专利:
    公开号 | 公开日
    CN103582744A|2014-02-12|
    US8973541B2|2015-03-10|
    WO2012166035A1|2012-12-06|
    KR101557337B1|2015-10-05|
    KR20140035473A|2014-03-21|
    EP2715077A4|2015-07-15|
    UA107307C2|2014-12-10|
    JP2014515461A|2014-06-30|
    EP2715077A1|2014-04-09|
    MX2013014128A|2014-07-09|
    EP2715077B1|2019-07-31|
    SE535886C2|2013-02-05|
    JP6165134B2|2017-07-19|
    RU2013156886A|2015-07-20|
    CN103582744B|2016-02-10|
    MX341279B|2016-08-12|
    US20140102386A1|2014-04-17|
    SG195189A1|2013-12-30|
    BR112013031109A2|2017-03-21|
    BR112013031109B1|2021-06-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    KR20180059517A|2015-10-07|2018-06-04|헤드만 에릭슨 페이턴트 에이비|Diesel engine driving method and diesel engine|CH503892A|1969-08-30|1971-02-28|Bosch Gmbh Robert|Control of inlet and outlet valves of internal combustion engines by liquid|
    DK154165C|1983-01-20|1989-04-03|Man B & W Diesel As|HYDRAULIC ACTIVATION MECHANISM FOR A GAS EXCHANGE VALVE IN A COMBUSTION ENGINE|
    US5193495A|1991-07-16|1993-03-16|Southwest Research Institute|Internal combustion engine valve control device|
    US5456221A|1995-01-06|1995-10-10|Ford Motor Company|Rotary hydraulic valve control of an electrohydraulic camless valvetrain|
    US5572961A|1995-04-05|1996-11-12|Ford Motor Company|Balancing valve motion in an electrohydraulic camless valvetrain|
    US5562070A|1995-07-05|1996-10-08|Ford Motor Company|Electrohydraulic camless valvetrain with rotary hydraulic actuator|
    SE520993C2|2000-07-10|2003-09-23|Cargine Engineering Ab|Pressure Pulse Generator|
    SE522163C2|2002-05-30|2004-01-20|Cargine Engineering Ab|Method and device for pressure pulse generation|
    US6782852B2|2002-10-07|2004-08-31|Husco International, Inc.|Hydraulic actuator for operating an engine cylinder valve|
    CN101171405A|2005-05-10|2008-04-30|通用汽车环球科技运作公司|Electro-hydraulic engine valve actuation|
    US7194990B2|2005-05-10|2007-03-27|Gm Global Technology Operations, Inc.|Electro-hydraulic engine valve actuation|
    SE531535C2|2006-02-14|2009-05-12|Cargine Engineering Ab|Method for braking an actuator piston, as well as a pneumatic actuator|
    US7421987B2|2006-05-26|2008-09-09|Lgd Technology, Llc|Variable valve actuator with latch at one end|
    US7536984B2|2007-04-16|2009-05-26|Lgd Technology, Llc|Variable valve actuator with a pneumatic booster|SE544218C2|2011-10-21|2022-03-08|Freevalve Ab|Pressure fluid controlled actuator|
    SE537203C2|2013-03-28|2015-03-03|Freevalve Ab|Actuator for axial displacement of an object|
    CN104330201B|2014-12-02|2016-10-19|上海神开石油设备有限公司|A kind of detection device for detecting pulser thrust and stroke|
    SE540421C2|2015-04-16|2018-09-11|Freevalve Ab|Actuator for axial displacement of an object|
    SE540425C2|2015-04-16|2018-09-11|Freevalve Ab|Actuator for axial displacement of an object|
    US10197436B2|2016-08-22|2019-02-05|United Technologies Corporation|Fluid pulse device and method of exciting gas turbine engine turomachinery components|
    CN108561370B|2018-07-23|2020-06-16|北京航空航天大学|Gas pulsating pressure generating device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1100435A|SE535886C2|2011-06-03|2011-06-03|Pressure Pulse Generator|SE1100435A| SE535886C2|2011-06-03|2011-06-03|Pressure Pulse Generator|
    BR112013031109-6A| BR112013031109B1|2011-06-03|2012-06-03|PRESSURE PULSE GENERATOR|
    JP2014513477A| JP6165134B2|2011-06-03|2012-06-03|Pressure pulse generator|
    RU2013156886/06A| RU2013156886A|2011-06-03|2012-06-03|PRESSURE PULSE GENERATOR|
    PCT/SE2012/000085| WO2012166035A1|2011-06-03|2012-06-03|Pressure pulse generator|
    EP12792628.5A| EP2715077B1|2011-06-03|2012-06-03|Pressure pulse generator|
    KR1020147000038A| KR101557337B1|2011-06-03|2012-06-03|Pressure Pulse Generator|
    MX2013014128A| MX341279B|2011-06-03|2012-06-03|Pressure pulse generator.|
    SG2013087846A| SG195189A1|2011-06-03|2012-06-03|Pressure pulse generator|
    CN201280027225.5A| CN103582744B|2011-06-03|2012-06-03|Pressure pulse generator|
    US14/123,569| US8973541B2|2011-06-03|2012-06-03|Pressure pulse generator|
    UAA201315428A| UA107307C2|2011-06-03|2012-06-03|Pressure pulse generator|
    [返回顶部]