Patents by Inventor Zdenek S. Meistrick
Zdenek S. Meistrick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8851048Abstract: A system for actuating an engine valve is disclosed. The system may include a rocker arm shaft (110) having a control fluid supply passage (112) and an exhaust rocker arm (500) pivotally mounted on the rocker arm shaft (110). A cam (210) for imparting main exhaust valve actuation to the exhaust rocker arm (500) may contact a cam roller associated with the exhaust rocker arm. A valve bridge (300) may be disposed between the exhaust rocker arm (500) and first and second engine valves (400, 450). A sliding pin (310) may be provided in the valve bridge (300), said sliding pin contacting the first engine valve (400). An engine braking rocker arm (100) may be pivotally mounted on the rocker arm shaft (110) adjacent to the exhaust rocker arm (500). The engine braking rocker arm may have a central opening, a hydraulic passage (102) connecting the central opening with a control valve (130), and a fluid passage (105) connecting the control valve with an actuator piston assembly (140).Type: GrantFiled: April 27, 2009Date of Patent: October 7, 2014Assignee: Jacobs Vehicle Systems, Inc.Inventor: Zdenek S. Meistrick
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Patent number: 8726863Abstract: A system for actuating an engine valve is disclosed. The system may include a rocker shaft having a hydraulic fluid supply circuit extending through the rocker shaft to a port on the outer surface of the rocker shaft and a solenoid valve adapted to selectively supply hydraulic fluid to the rocker shaft hydraulic fluid supply circuit. The rocker shaft may be supported by one or more rocker shaft pedestals. A lost motion housing may be incorporated into a rocker shaft pedestal and disposed about the rocker shaft. The lost motion housing may have an actuator piston assembly and a control valve assembly connected by an internal hydraulic circuit. The lost motion housing may be secured in a fixed position relative to the rocker shaft. External hydraulic fluid tubing may be provided between the solenoid valve and the control valve in the form of jumper tubes extending between adjacent rocker shafts or in the form of external hydraulic fluid tubes extending from control valve to control valve.Type: GrantFiled: April 5, 2011Date of Patent: May 20, 2014Assignee: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Robert S. Perkins, Neil E. Fuchs, Yan Dong, Steve Kacmarcik
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Publication number: 20140109848Abstract: Systems and methods for actuating engine valves are disclosed. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. The primary rocker arm may actuate engine valves for primary valve actuation motions, such as main exhaust events, in response to an input from a first valve train element, such as a cam. The auxiliary rocker arm may receive one or more auxiliary valve actuation motions, such as for engine braking, exhaust gas recirculation, and/or brake gas recirculation events, from a second valve train element to actuate one of the engine valves. Master and slave pistons may be provided in the primary rocker arm. The master piston may be actuated by the auxiliary rocker arm.Type: ApplicationFiled: December 20, 2013Publication date: April 24, 2014Inventors: Robb Janak, Brian Ruggiero, Zdenek S. Meistrick
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Patent number: 8627791Abstract: Systems and methods for actuating engine valves are disclosed. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. The primary rocker arm may actuate engine valves for primary valve actuation motions, such as main exhaust events, in response to an input from a first valve train element, such as a cam. The auxiliary rocker arm may receive one or more auxiliary valve actuation motions, such as for engine braking, exhaust gas recirculation, and/or brake gas recirculation events, from a second valve train element to actuate one of the engine valves. Master and slave pistons may be provided in the primary rocker arm. The master piston may be actuated by the auxiliary rocker arm.Type: GrantFiled: May 25, 2012Date of Patent: January 14, 2014Assignee: Jacobs Vehicle Systems, Inc.Inventors: Robb Janak, Brian Ruggiero, Zdenek S. Meistrick
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Patent number: 8528508Abstract: A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a hydraulic fluid supply passage with an actuator piston. The system may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft.Type: GrantFiled: April 5, 2010Date of Patent: September 10, 2013Assignee: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Robert S. Perkins, Neil E. Fuchs
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Publication number: 20120298057Abstract: Systems and methods for actuating engine valves are disclosed. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. The primary rocker arm may actuate engine valves for primary valve actuation motions, such as main exhaust events, in response to an input from a first valve train element, such as a cam. The auxiliary rocker arm may receive one or more auxiliary valve actuation motions, such as for engine braking, exhaust gas recirculation, and/or brake gas recirculation events, from a second valve train element to actuate one of the engine valves. Master and slave pistons may be provided in the primary rocker arm. The master piston may be actuated by the auxiliary rocker arm.Type: ApplicationFiled: May 25, 2012Publication date: November 29, 2012Applicant: Jacobs Vehicle Systems, Inc.Inventors: Robb Janak, Brian Ruggiero, Zdenek S. Meistrick
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Publication number: 20120272644Abstract: The present invention relates to a methods and apparatus for controlling the actuation of the waste gate of a turbocharger. The waste gate may be opened in response to a pneumatically operated waste gate actuator connected to the intake manifold by a waste gate actuator passage. A waste gate cut-off valve may be disposed in the waste gate actuator passage and may block the waste gate actuator passage in response to an engine braking operation of the engine. Alternatively, a snubber may be disposed in the waste gate actuator passage.Type: ApplicationFiled: April 27, 2012Publication date: November 1, 2012Applicant: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Neil E. Fuchs, Yan Dong
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Patent number: 8151763Abstract: A lost motion valve actuation system includes an engine brake housing and one or more hydraulic fluid supply passages extending through the housing. Master and slave pistons are slidably disposed corresponding bores in the housing. The master and slave pistons are used to provide selective actuation to one or more engine valves. An engine brake rocker arm disposed adjacent to the housing includes a master piston contact surface and a bias mechanism contact surface. A bias mechanism is disposed in the housing and includes a bias piston which extends from the housing. The bias piston biases the rocker arm out of contact with an engine cam during select engine operation modes, such as during a positive power mode of operation. The bias piston may be mechanically or hydraulically repositioned to permit the rocker arm to contact the engine cam during a second mode of engine operation, such as an engine braking mode.Type: GrantFiled: June 14, 2011Date of Patent: April 10, 2012Assignee: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Joseph A. Bonfatto
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Publication number: 20120048232Abstract: A system for actuating an engine valve is disclosed. The system may include a rocker arm shaft (110) having a control fluid supply passage (112) and an exhaust rocker arm (500) pivotally mounted on the rocker arm shaft (110). A cam (210) for imparting main exhaust valve actuation to the exhaust rocker arm (500) may contact a cam roller associated with the exhaust rocker arm. A valve bridge (300) may be disposed between the exhaust rocker arm (500) and first and second engine valves (400, 450). A sliding pin (310) may be provided in the valve bridge (300), said sliding pin contacting the first engine valve (400). An engine braking rocker arm (100) may be pivotally mounted on the rocker arm shaft (110) adjacent to the exhaust rocker arm (500). The engine braking rocker arm may have a central opening, a hydraulic passage (102) connecting the central opening with a control valve (130), and a fluid passage (105) connecting the control valve with an actuator piston assembly (140).Type: ApplicationFiled: April 27, 2009Publication date: March 1, 2012Applicant: Jacobs Vehicle Systems, Inc.Inventor: Zdenek S. Meistrick
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Publication number: 20110297123Abstract: A lost motion valve actuation system includes an engine brake housing and one or more hydraulic fluid supply passages extending through the housing. Master and slave pistons are slidably disposed corresponding bores in the housing. The master and slave pistons are used to provide selective actuation to one or more engine valves. An engine brake rocker arm disposed adjacent to the housing includes a master piston contact surface and a bias mechanism contact surface. A bias mechanism is disposed in the housing and includes a bias piston which extends from the housing. The bias piston biases the rocker arm out of contact with an engine cam during select engine operation modes, such as during a positive power mode of operation. The bias piston may be mechanically or hydraulically repositioned to permit the rocker arm to contact the engine cam during a second mode of engine operation, such as an engine braking mode.Type: ApplicationFiled: June 14, 2011Publication date: December 8, 2011Applicant: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Joseph A. Bonfatto
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Publication number: 20110290206Abstract: A system for actuating an engine valve is disclosed. The system may include a rocker shaft having a hydraulic fluid supply circuit extending through the rocker shaft to a port on the outer surface of the rocker shaft and a solenoid valve adapted to selectively supply hydraulic fluid to the rocker shaft hydraulic fluid supply circuit. The rocker shaft may be supported by one or more rocker shaft pedestals. A lost motion housing may be incorporated into a rocker shaft pedestal and disposed about the rocker shaft. The lost motion housing may have an actuator piston assembly and a control valve assembly connected by an internal hydraulic circuit. The lost motion housing may be secured in a fixed position relative to the rocker shaft. External hydraulic fluid tubing may be provided between the solenoid valve and the control valve in the form of jumper tubes extending between adjacent rocker shafts or in the form of external hydraulic fluid tubes extending from control valve to control valve.Type: ApplicationFiled: April 5, 2011Publication date: December 1, 2011Applicant: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Robert S. Perkins, Neil E. Fuchs, Yan Dong, Steve R. Kacmarcik
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Patent number: 7971569Abstract: A lost motion valve actuation system includes an engine brake housing and one or more hydraulic fluid supply passages extending through the housing. Master and slave pistons are slidably disposed corresponding bores in the housing. The master and slave pistons are used to provide selective actuation to one or more engine valves. An engine brake rocker arm disposed adjacent to the housing includes a master piston contact surface and a bias mechanism contact surface. A bias mechanism is disposed in the housing and includes a bias piston which extends from the housing. The bias piston biases the rocker arm out of contact with an engine cam during select engine operation modes, such as during a positive power mode of operation. The bias piston may be mechanically or hydraulically repositioned to permit the rocker arm to contact the engine cam during a second mode of engine operation, such as an engine braking mode.Type: GrantFiled: July 31, 2009Date of Patent: July 5, 2011Assignee: Jacobs Vehicle Systems, Inc.Inventors: Zdenek S. Meistrick, Joseph A. Bonfatto
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Patent number: 7823553Abstract: A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a master piston bore with a slave piston bore. The lost motion housing may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. A master piston may be disposed in the master piston bore and a slave piston may be disposed in the slave piston bore. A rocker arm may be disposed on the rocker shaft between the spaced collars and may have a first portion adapted to contact a cam and a second portion adapted to contact the master piston. In a preferred embodiment, the system may be used to provide compression release engine braking or bleeder engine braking.Type: GrantFiled: March 14, 2008Date of Patent: November 2, 2010Assignee: Jacobs Vehicle Systems, Inc.Inventor: Zdenek S. Meistrick
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Publication number: 20100251983Abstract: A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a hydraulic fluid supply passage with an actuator piston. The system may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft.Type: ApplicationFiled: April 5, 2010Publication date: October 7, 2010Applicant: Jacobs Vehicle Systems, Inc.Inventors: ZDENEK S. MEISTRICK, Robert S. Perkins, Neil E. Fuchs
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Patent number: 7735466Abstract: An exhaust brake and method of operating an exhaust brake are disclosed. The exhaust brake may have a housing having a central opening and a boss with a central bore, wherein the central bore intersects the central opening. A butterfly gate may be pivotally mounted in the central opening. The butterfly gate may have a bypass opening provided in an outer edge of the butterfly gate, and an upstream side. A dual-diameter piston may be slide-ably disposed in the central bore. The piston may have a lower end received in the bypass opening and an upper end distal from the bypass opening. One or more passages may extend between the central opening and the central bore at the upstream side of the butterfly gate, and a spring may bias the piston lower end into the bypass opening. The piston lower end may selectively unblock the bypass opening responsive to the application of static exhaust gas pressure to the piston upper end.Type: GrantFiled: June 12, 2009Date of Patent: June 15, 2010Assignee: Jacobs Vehicle Systems, Inc.Inventors: Jacob M. Moore, Zdenek S. Meistrick, Neil E. Fuchs, Steven Botellio, Zhi Qiang Chu
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Publication number: 20100108026Abstract: A lost motion valve actuation system includes an engine brake housing and one or more hydraulic fluid supply passages extending through the housing. Master and slave pistons are slidably disposed corresponding bores in the housing. The master and slave pistons are used to provide selective actuation to one or more engine valves. An engine brake rocker arm disposed adjacent to the housing includes a master piston contact surface and a bias mechanism contact surface. A bias mechanism is disposed in the housing and includes a bias piston which extends from the housing. The bias piston biases the rocker arm out of contact with an engine cam during select engine operation modes, such as during a positive power mode of operation. The bias piston may be mechanically or hydraulically repositioned to permit the rocker arm to contact the engine cam during a second mode of engine operation, such as an engine braking mode.Type: ApplicationFiled: July 31, 2009Publication date: May 6, 2010Inventors: Zdenek S. Meistrick, Joseph A. Bonfatto
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Publication number: 20100108007Abstract: A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a hydraulic fluid supply passage with an actuator piston. The system may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft.Type: ApplicationFiled: November 3, 2009Publication date: May 6, 2010Applicant: JACOBS VEHICLE SYSTEMS, INC.Inventors: Zdenek S. Meistrick, ROBERT S. PERKINS
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Publication number: 20080223325Abstract: A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a master piston bore with a slave piston bore. The lost motion housing may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. A master piston may be disposed in the master piston bore and a slave piston may be disposed in the slave piston bore. A rocker arm may be disposed on the rocker shaft between the spaced collars and may have a first portion adapted to contact a cam and a second portion adapted to contact the master piston. In a preferred embodiment, the system may be used to provide compression release engine braking or bleeder engine braking.Type: ApplicationFiled: March 14, 2008Publication date: September 18, 2008Inventor: Zdenek S. Meistrick
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Patent number: 7392772Abstract: Systems and methods for actuating engine valves are disclosed. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. The primary rocker arm may actuate an engine valve for primary valve actuation motions, such as main exhaust events, in response to an input from a first valve train element, such as a cam. The auxiliary rocker arm may receive one or more auxiliary valve actuation motions, such as for engine braking, exhaust gas recirculation, and/or brake gas recirculation events, from a second valve train element. A hydraulic actuator piston may be disposed between the auxiliary rocker arm and the primary rocker arm. The actuator piston may be selectively locked into an extended position between the primary and auxiliary rocker arms so as to selectively transfer the one or more auxiliary valve actuation motions from the auxiliary rocker arm to the primary rocker arm.Type: GrantFiled: May 6, 2005Date of Patent: July 1, 2008Assignee: Jacobs Vehicle Systems, Inc.Inventors: Robb Janak, Zdenek S. Meistrick
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Patent number: 5146754Abstract: A diverter for a divided volute turbocharger has a rotatable diverter member in one volute passageway of the turbocharger. The diverter member is rotatable between a first position in which the flow of gas through the associated volute passageway is unimpeded by the diverter member, and a second position in which the diverter member blocks the associated volute passageway and causes the gas from that passageway to flow through an interconnection passageway into the other volute passageway. If desired, the diverter member may block the interconnection passageway while the diverter member is in the first position.Type: GrantFiled: February 8, 1991Date of Patent: September 15, 1992Assignee: Jacobs Brake Technology Corp.Inventors: Adish Jain, Zdenek S. Meistrick, Vincent J. Pitzi