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Internal-combustion Engines > Poppet Valve Operating Mechanism > Hydraulic System Hydraulic SystemHydraulic System patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.01/10/08 - 20080006231 - Variable valve actuation and engine braking Systems and methods of actuating two engine valves associated with a common engine cylinder using one or more lost motion systems and one or more control valves are disclosed. The control valves are capable of selectively trapping hydraulic fluid in the lost motion systems for auxiliary engine valve actuations and ... 11/08/07 - 20070256652 - Control strategy for hydraulically-switched engine mechanisms A method for distributing lock pin ejections evenly over all the switchable mechanisms in a plurality of switchable mechanisms: establishing a limiting number of lock pin ejections; designating a primary switchable mechanism for the mode change upon command from an engine control module (ECM); employing the designated primary switchable mechanism ... 11/08/07 - 20070256651 - Valve actuator assembly having a center biased spool valve with detent feature A valve actuator assembly for an engine includes a movable poppet valve, and movable first and second spool valves. The assembly also includes an intermediate channel interconnecting the first and second spool valve, a driving channel, and a first and second feedback channel interconnecting the second spool valve and the ... 09/20/07 - 20070215078 - Methods and apparatus to use engine valves as both intake and exhaust valves Methods and apparatus to selectively use engine valves as both intake and exhaust valves and to selectively operate the engine as a 2 cycle or as a 4 cycle engine. In a disclosed embodiment, the intake valves and the exhaust valves, are manifolded together through a small manifold, with the ... 09/13/07 - 20070209619 - Hybrid vehicle system having engine with variable valve operation A system for a vehicle, comprising of an internal combustion engine coupled in the vehicle, the engine having at least one cylinder with an intake and exhaust valve, where the opening and closing timing of the intake valve is adjustably retardable and the opening and closing timing of the exhaust ... 09/13/07 - 20070209618 - Hybrid vehicle system having engine with variable valve operation A system for a vehicle with an engine having at least one cylinder with at least an intake valve and an exhaust valve, comprising of a hydraulic variable valve actuator system configured to vary a timing of the intake valve in a first range and a timing of the exhaust ... 09/06/07 - 20070204817 - Hydraulic actuation system for improved engine control A system for an internal combustion engine of a vehicle is provided. The system comprises a hydraulic pump configured to be powered at least partially by a source other than the engine; an adjustable hydraulic engine actuator configured to be adjusted by hydraulic fluid of the pump; a control system ... 09/06/07 - 20070204816 - Hydraulic actuation system for improved engine start A method of starting an internal combustion engine for a vehicle having at least a hydraulic pump configured to be powered at least partially by a source other than the engine and an adjustable hydraulic actuator configured to be adjusted by hydraulic fluid of the hydraulic pump is provided. The ... 08/30/07 - 20070199528 - Valve gear and method for opening and closing a passage A valve gear includes a housing provided with a passage, a valve member arranged within the housing, which is movable between a first, closed position, in which the passage is closed, and a second, open position, a piston connected to the valve member, which can oscillate in an at least ... 06/07/07 - 20070125327 - System and method for hydraulic valve actuation Systems and methods for hydraulic and/or variable valve actuation of engine valves are disclosed. An embodiment of the present invention may include a hydraulic valve actuation system operatively connected to an engine valve. First and second control valves may be operatively connected to the hydraulic valve actuation system and adapted ... 05/24/07 - 20070113804 - Valve operating apparatus and method for an engine A valve operating apparatus for an internal combustion engine including: a housing (2); a reciprocating piston (1) residing wholly within the housing (2), the reciprocating piston (1) driving one or more poppet valves (7); a first fluid supply path and a first fluid drain path, each path being controllable to ... 04/26/07 - 20070089695 - Cold temperature operation for added motion valve system A hydraulic circuit in fluid communication with an added motion valve system is disclosed. The hydraulic circuit in fluid communication with an added motion valve system includes at least a first valve that permits flow of a fluid in a first fluid supply channel to an added motion actuator volume ... 04/12/07 - 20070079781 - Procedure to operate an internal combustion engine with an electrohydraulic valve control In a procedure to operate an internal combustion engine with an electrohydraulic valve control which comprises electrically activated oil control valves for hydraulic actuators for the actuation of charge-cycle valves, a motor control unit as well as an output stage unit, which is connected to the motor control unit via ... 04/12/07 - 20070079780 - Variable engine valve control system with pressure difference A kind of variable engine valve control system with pressure difference comprises hydraulic supply equipment, hydraulic actuator apparatus, valve and spring controlling piston balance. The hydraulic actuator comprises hydraulic cylinder, piston and piston rod. The piston rod is coupled and moved with the valve. It is characterized by that the ... 02/01/07 - 20070022988 - Variable valve actuator Improved actuators and valve control systems, and methods for controlling actuators and/or engine valves, are disclosed. In addition to the inherent capability of timing control, the ability to provide continuous valve lift or stroke control greatly improves engine achieve fuel economy, emission and performance. The power-off state of the actuator ... 02/01/07 - 20070022987 - Variable valve actuator Improved actuators and valve control systems, and methods for controlling actuators and/or engine valves, are disclosed. In addition to the inherent capability of timing control, the ability to provide continuous valve lift or stroke control greatly improves engine achieve fuel economy, emission and performance. The power-off state of the actuator ... 02/01/07 - 20070022986 - Variable valve actuator Improved actuators and valve control systems, and methods for controlling actuators and/or engine valves, are disclosed. In addition to the inherent capability of timing control, the ability to provide continuous valve lift or stroke control greatly improves engine achieve fuel economy, emission and performance. The power-off state of the actuator ... 12/21/06 - 20060283411 - Variable valve actuator Actuators, and corresponding methods and systems for controlling such actuators, provide independent lift and timing control with minimum energy consumption, while supplying sufficient supplemental energy to overcome friction. In an exemplary embodiment, an actuation cylinder in a housing defines a longitudinal axis and having first and second ends in first ... 12/21/06 - 20060283410 - Variable valve actuator Actuators, and corresponding methods and systems for controlling such actuators, provide independent lift and timing control with minimum energy consumption. In an exemplary embodiment, an actuation cylinder in a housing defines a longitudinal axis and having first and second ends in first and second directions. An actuation piston in the ... 12/21/06 - 20060283409 - Hyrdaulic cam for variable timing/displacement valve train A hydraulic fluid cam providing variable valve actuation in an engine is disclosed. In one embodiment, the hydraulic fluid cam is adapted to vary valve timing while holding valve displacement constant. In another embodiment, the hydraulic fluid cam is adapted to vary valve displacement, while holding valve timing constant. Some ... 12/21/06 - 20060283408 - Variable valve actuator Actuators, and corresponding methods and systems for controlling such actuators, provide independent lift and timing control with minimum energy consumption. In an exemplary embodiment, an actuation cylinder in a housing defines a longitudinal axis and having first and second ends in first and second directions. An actuation piston in the ... 11/16/06 - 20060254543 - Electro-hydraulic engine valve actuation Hydraulic actuator as an element of a system for controlling an engine valve is presented. The actuator includes a fluidic actuation chamber, defined by an actuation piston that increases chamber volume as the actuation piston is urged away from a neutral. Chamber includes a high pressure fluid inlet and a ... 11/16/06 - 20060254542 - Hydraulic valve actuation system with valve lash adjustment A hydraulic valve actuation system has a hydraulic actuator connected with a valve in an engine. The hydraulic actuator has a boost pin enclosing a drive pin in a casing. The drive pin connects with and defines a valve lash with a valve stem of the valve. The hydraulic actuator ... 10/26/06 - 20060236958 - Engine valve actuation system and method The present invention provides a valve actuation system for an internal combustion engine. The valve actuation system of the present invention may provide an increased range of auto-ignition operation by providing a valve re-opening mechanism to provide products of combustion into the cylinder to increase the thermal efficiency and stability ... 09/21/06 - 20060207530 - Direct pressure feed air bleed system A manifold assembly includes a pressure feed orifice that directly connects an inlet circuit to a control circuit of the manifold. This direct connection between the pressure inlet to the control circuit allows air to be bled out of the manifold assembly. Low pressure fluid in the assembly pushes out ... 07/13/06 - 20060150935 - Camless engine hydraulic valve actuated system A method and apparatus for hydraulically actuating a gas exchange valve using a low-pressure, substantially constant flow fluid source applied to at least one actuator cylinder piston coupled to the gas exchange valve. The actuator piston slides within the actuator cylinder upon application of pressure from the fluid for actuating ... 07/13/06 - 20060150934 - Variable valve system of internal combustion engine and hydraulic actuator In a hydraulic actuator comprising a hydraulic piston, a hydraulic cylinder and a hydraulic pressure source wherein said hydraulic piston has a larger area exposed to pressure on the side of the control chamber than on the side of oil supply chamber of said hydraulic cylinder, wherein said hydraulic piston ... 06/29/06 - 20060137634 - Internal combustion engine with valves with variable actuation which are driven by a single pumping piston and controlled by a single solenoid valve for each engine cylinder In an internal combustion engine with variable actuation valves, each variable actuation valve is actuated by an actuator assembly including an actuating piston slidably mounted in a guide bushing. Between the actuating piston and the stem of the respective valve is interposed an auxiliary hydraulic tappet positioned outside the guide ... 06/29/06 - 20060137633 - Arrays for controllable power supply of electrovalves of an electrohydraulic valve control An arrangement for supplying current to the solenoid valves of an electrohydraulic valve-timing system of an internal combustion engine in a controllable manner has solenoid valves assigned to the gas-exchange actuators. A two-stage supplying of voltage is provided for the solenoid valves, namely the supplying of an inrush voltage from ... 05/25/06 - 20060107914 - Electro-hydraulic lost-motion valve train An electro-hydraulic lost motion system for variable valve activation including a master piston and an accumulation piston in a first bore, defining a hydraulic pressure chamber therebetween, in response to rotation of an engine cam. A slave piston in the engine head and hydraulically connected to the pressure chamber opens ... 05/04/06 - 20060090717 - Engine valve actuation system An engine valve actuation system is provided. An intake valve is moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid. A cam assembly is connected to move the intake valve between the first position and the second position. ... 04/27/06 - 20060086329 - Engine valve actuation system An engine valve actuation system is provided. The engine valve actuation system includes an intake valve that is moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid. A cam assembly is configured to move the intake valve between ... 04/27/06 - 20060086328 - Method and device for pressure pulse generation A device for generating pressure pulses, includes a pressure fluid source and a pressure fluid depression, a pressure fluid circuit, a valve body displaceably located in a chamber, a first branch and a second branch the branches leaving to opposite sides of the valve body, the chamber having an opening ... 04/13/06 - 20060075980 - Lifter oil manifold assembly for v-type engines According to the invention, multiple-cylinder internal combustion engines comprise a lifter oil manifold assembly (LOMA) positioned in an improved and beneficial manner. In one embodiment, engines of the invention comprise an engine block comprising a V-valley in which the LOMA is mounted such that longitudinal axes of the plurality of ... 03/16/06 - 20060054118 - Internal combustion engine having valves with variable actuation and hydraulic actuating units which control the valves by means of rocker arms In an internal combustion engine provided with valves with variable actuation, each variable actuation valve is controlled by a hydraulic actuator unit through a rocker arm. ... 03/09/06 - 20060048730 - Arrangement of an internal combustion engine poppet valve and an actuator therefor The present invention (with reference to FIG. 1) is an arrangement of an internal combustion engine poppet valve and a hydraulic actuator therefor comprising: an actuator housing (16); spring means (104,105) for biassing the poppet valve (101) into engagement with a valve seat therefor; a first piston (1) of a ... 01/19/06 - 20060011159 - System and method for controlling engine operation A method of controlling an engine is provided. At least one operating parameter of the engine is sensed. The engine is operated in a first mode in response to the sensed operating parameter being at one of a predetermined first set of conditions. In the first mode, a cam assembly ... 01/19/06 - 20060011158 - Valve case and resin cylinder head cover A valve case includes an attaching portion and a sleeve. The valve case is attached to a cylinder head cover main body formed of resin. The attaching portion is formed of resin and is a portion of the valve case to which an oil control valve is to be attached. ... 12/22/05 - 20050279301 - System and method for actuating an engine valve An engine valve actuator is provided. The actuator includes an actuator housing that defines a tank adapted to store a supply of fluid and a bore in fluid communication with the tank. A piston is slidably disposed in the bore of the actuator housing. The piston is adapted to move ... 12/15/05 - 20050274337 - Engine valve actuator An engine valve actuator for an internal combustion engine is provided. The engine valve actuator includes a housing having an opening and a first fluid passageway leading to the opening. An adjustment member is disposed in the housing and includes a protrusion that extends into the opening of the housing. ... 12/15/05 - 20050274336 - Electromagnetic hydraulic valve, particularly 3/2-way pilot valve for controlling a variable valve drive of an internal combustion engine An electromagnetic hydraulic valve having an electromagnet with a coil winding arranged on a spool, and a magnet housing, a valve stem having a pressure connection, a tank connection and a consumer connection. The spool and the valve stem are a one-piece plastic body which has an axial longitudinal bore ... 12/01/05 - 20050263117 - Device and a method for the generation of pressure pulses A device for the generation of pressure pulses, includes a cylinder (3), a piston that is displaceably arranged in the cylinder (3), a pressure fluid circuit with an inlet (6) into and an outlet (7) out of the cylinder (3) on one side of the piston (4), a shaft (18) ... 11/17/05 - 20050252465 - Oil control valve and installing method thereof As a result, all the essential part of the oil control valve (60) is disposed inside the head cover (18), and therefore space factor is improved. Even in case of oil leakage out of the solenoid (31), the oil flows in the head cover, and the oil does not leak ... 11/03/05 - 20050241597 - Air and fuel supply system for a combustion engine An internal combustion engine has an engine block defining at least one cylinder, a head, a piston, an air intake valve, and a valve actuator. The valve actuator has an actuator housing defining a tank and a bore, and a piston adapted to engages the air intake valve. The valve ... 09/29/05 - 20050211201 - Hydraulic valve actuation systems and methods to provide multiple lifts for one or more engine air valves Hydraulic valve actuation systems and methods to provide multiple lifts for engine valves using fixed or hard stops at each lift. The fixed or hard stops provide a very repeatable selection of engine valve lifts dependent on engine operating conditions. For full valve lift, unidirectional hydraulic dashpots are used to ... 06/23/05 - 20050132987 - Internal combustion engine valve seating velocity control The present disclosure provides an engine having a gas exchange valve and an actuator for the gas exchange valve, and also a method of reducing valve seating impact velocity. The actuator includes a body having a fluid inlet and a fluid outlet. A plunger is reciprocable in the body and ... 06/23/05 - 20050132986 - Engine valve actuation system An engine valve actuation system includes an engine valve moveable between first and second positions, a valve actuation assembly connected to move the engine valve between the first and second positions, a fluid actuator configured to selectively modify a timing of the engine valve in moving from the second to ... 06/23/05 - 20050132985 - System and method of retaining hydraulic fluid in a hydraulic valve actuation system Methods and systems for retaining hydraulic fluid in a hydraulic valve actuation system adapted to be installed on an internal combustion engine are disclosed. The system may include a hydraulic fluid supply connected by one or more passages to a fluid accumulator and a hydraulic valve actuator. The one or ... 06/16/05 - 20050126523 - Hydraulically actuated, variable valve drive of an internal combustion engine A hydraulically actuated, preferably variable, valve drive of an internal-combustion engine is provided, with a slave unit (15), which is embodied as a separate component relative to a master unit. A special characteristic is that the slave unit is provided with a hydraulic backlash compensation element (9), which is connected ... 06/16/05 - 20050126522 - Multiple slave piston valve actuation system Systems and methods of actuating engine valves using a hydraulic valve actuation system are disclosed. The valve actuation system includes a master piston and two slave pistons slidably disposed in bores provided in a housing. The master piston and two slave pistons are connected together by a hydraulic circuit. Linear ... ### FreshPatents.com Support |