479 results about "Wastegate" patented technology

As one example, an engine system for a vehicle is provided, comprising an internal combustion engine including an air intake system and an exhaust system; a first turbocharger including a first compressor arranged along a first branch of the air intake system, a first turbine arranged along a first branch of the exhaust system, and a first turbine bypass passage include a first wastegate; a second turbocharger including a second compressor arranged along a second branch of the air intake system, a second turbine arranged along a second branch of the exhaust system, and a second turbine bypass passage including a second wastegate; a first exhaust gas sensor arranged along the first branch of the exhaust system downstream of the first turbine and first wastegate; a second exhaust gas sensor arranged along the second branch of the exhaust system downstream of the second turbine and the second wastegate; and a control system configured to command both the first wastegate and the second wastegate to a closed position or an opened position and to indicate one of said wastegates as unresponsive to said command in response to a temperature difference between the first and second branches indicated by the first and second exhaust gas sensors.

Methods and systems are provided for reducing condensate accumulation at a charge air cooler (CAC) during cold ambient conditions. A wastegate may be held closed while a compressor recirculation valve is held open during an engine cold start so as to use compressor heating and increased compressor recirculation to expedite CAC heating. EGR delivery is delayed until the CAC is sufficiently warm to reduce the propensity for condensation.

A system for controlling boost pressure at various different altitudes of operation of a turbo charged internal combustion engine includes a wastegate valve, an actuator, and a controller. Signals delivered from an engine speed sensor, a boost pressure transducer, a barometric pressure sensor, and a turbocharger speed sensor are processed in the controller. A control signal delivered from the controller to the actuator controls the position of the wastegate valve, bypass of exhaust gasses, and the speed of the turbocharger. The controller is configured to compare the turbocharger speed to a predetermined threshold value and determine the control signal based on the comparison.

A turbocharger for an internal combustion engine and which has a housing with a turbine housed in a chamber in the housing, and driven by exhaust gases from the engine. The turbocharger has an integral EGR valve and wastegate.

A system for reducing noise of a wastegate valve apparatus including a bypass passage, a wastegate valve, an actuator and a link unit delivering the power of the actuator to the wastegate valve, may have a first link connected to the actuator, a third link connected to the wastegate valve, a second link provided with a rod disposed between the first link and the third link, wherein the second link includes a rod end ball bearing having a penetration hole into which a bolt member is inserted and a ball coupled to the penetration hole, and a joint connecting the rod and the third link, and a first washer disposed between the rod end ball bearing and the first link, wherein the first washer includes a support body, and an elastic member disposed between the first link and the support body.

A wastegate assembly (200) for a turbocharger (101) or the like is provided having a support plate (300), an actuator (275), a linkage (250) operably connected to the actuator (275), and a valve plate (225) operably connected to the linkage (250). The linkage (250) translates actuation of the actuator (275) to movement of the valve plate (225) thereby sealing or unsealing the bypass outlet (500). The actuator (275), linkage (250) and valve plate (225) can be pre-assembled to the support plate (300) prior to the support plate (300) being connected to the turbine housing (102). The actuator (275), linkage (250) and valve plate (225) can be calibrated prior to the wastegate assembly (200) being connected to the turbine housing (102). The bypass outlet (500) can be machined via access provided by the wastegate port (400).

In a waste gate valve, a coil spring being expandable and contractible in the axial direction of a valve shaft is provided between a washer and an attachment tongue in an axial direction of a valve shaft of a valve. The coil spring is made of a heat-resistant alloy or a ceramic. An annular guard wall is formed on a front surface of the attachment tongue by counter boring in such a way as to surround the coil spring.

An engine system comprises an internal combustion engine, a turbocharger and an external wastegate valve. The turbocharger includes a housing for an exhaust gas turbine and a separate housing for the wastegate valve. The turbine housing is liquid cooled so as to reduce its operating temperature thereby allowing it to be made from an aluminium alloy so as to save cost and reducing, during use, the radiation of heat therefrom.

Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Various methods for compensating variation in the geometry and position of linkages and valve seats in wastegate assemblies are provided. In one example, a method of operating a wastegate in an internal combustion engine comprises, at engine startup, placing a wastegate valve at a seat, recording a position of the seat and associating the seat position with one or more operating parameters, and modifying a position of a wastegate actuator based on the seat position throughout engine operation.