摘要:
Presented are a method, apparatus and valve assembly (102) for preventing rotation. An exemplary valve assembly (102) includes a butterfly valve (104) rotatably moveable between a closed position and an open position, and a shaft (110) extending from the butterfly valve (104) and rotatable about a longitudinal axis to move the butterfly valve (104) between the open position and the closed position. The valve assembly (102) further includes an actuator (106) having a body (1 33) operable to maintain an end portion of the shaft (110), the actuator (106) operable to cause the shaft (110) to rotate about the longitudinal axis, a housing (130) sized to retain a portion of the shaft (110), the housing (1 30) operable to be in removeable contact with the body (1 33), a seal (128) intermediate the body (133) and the shaft (110), the seal (1128) having an outer sealing surface (1 36) contacting the body (1 33) and an inner sealing surface (134) contacting the shaft (110), and an anti-rotation interface (135) between the seal (128) and the housing (1 30).
摘要:
The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.
摘要:
The invention relates to an exhaust gas recirculation control system for internal combustion engines comprising an intake manifold (1) for delivering combustion air to the individual combustion chambers, an exhaust manifold (2) for discharging the exhaust gases from the combustion chambers, an exhaust gas recirculation pipe (3) that connects the intake manifold (1) and the exhaust manifold (2), and a mechanical injection pump (4) which is controlled by a control rod (5). The invention is characterized in that an electrically controlled exhaust gas recirculation valve (6) is disposed in the exhaust gas recirculation pipe (3) in order to control the effective cross section of the exhaust gas recirculation pipe (3) while an electrical tapping device (7) determines the position of the control rod (5) and then controls the exhaust gas recirculation valve (6).
摘要:
An EGR system for an engine that includes an exhaust gas recirculation conduit in fluid communication with an exhaust line and an intake port is provided. A cooler is fluidly positioned along the exhaust gas recirculation conduit and in fluid communication with the exhaust line and the intake port. A valve is fluidly positioned along the exhaust gas recirculation conduit and in fluid communication with the exhaust line and the intake port. The valve includes an electronic solenoid controlled hydraulic actuator operable to control the valve, and the actuator includes a position feedback sensor to detect a position of the valve.
摘要:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Kühlung rückgeführten Abgases einer flüssigkeitsgekühlten Brennkraftmaschine mit Abgasrückführeinrichtung. Die Vorrichtung kennzeichnet sich dabei durch einen Kühleinsatz (7, 7') in einem kühlflüssigkeitsführenden Kanal (6, 6') der Brennkraftmaschine und eine entsprechende Gestaltung des den Kanal (6, 6') im Bereich des Kühleinsatzes (7, 7') begrenzenden Bauteils (1, 28) für eine Kühlung des den Kühleinsatz (7, 7') durchströmenden rückgeführten Abgases durch die den Kanal (6, 6') durchströmende Kühlflüssigkeit. Das erfindungsgemäße Verfahren kennzeichnet sich dadurch, daß das rückgeführte Abgas vor seiner Wiedereinleitung in den Verbrennungsprozeß der Brennkraftmaschine durch einen in einem kühlflüssigkeitsführenden Kanal (6, 6') angeordneten Kühleinsatz (7, 7') hindurchgeleitet und dabei durch die den Kanal (6, 6') durchströmende Kühlflüssigkeit der Brennkraftmaschine gekühlt wird.
摘要:
A multiple step valve opening control system, particularly for an EGR control valve unit, having a plurality of valve lifts. The system comprises a valve member (16) for opening a fluid passage (14) in multiple steps, a first piston (26) slidably housed in a housing (12), a second cylinder (28) substantially coaxial with the first piston (26), a second piston (30) fitted in the second cylinder (26) and coupled to the valve member (16), and a first piston stroke regulating member (46) which is moved selectively to a first position for regulating an allowable displacement of the first piston (26) to a first predetermined extent (l 1 ) or to a second position for regulating the allowable displacement of the first piston (26) to the first predetermined first extent (l 1 ) plus a third predetermined extent (l 3 ). By changing the position of the first piston displacement regulating member (46), the valve member (16) is opened by various valve lifts.
摘要:
The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.