An injector includes an injector body having an upper portion defining a top surface. An injector core is received through the upper portion. The injector core has an interfacing surface that is disposed adjacent and raised with respect to the top surface. A cover member is disposed on the upper portion of the injector body. The cover member has a top wall disposed proximal to the top surface of the injector body and defining an aperture for receiving the injector core therethrough, a side wall extending from the top wall, and a lip that is disposed at an end of the side wall. The lip is adapted to be attached to a circumferential wall of the injector body through a snap-fit connection. Upon attachment, the top wall presses on the interfacing surface of the injector core to restrict an axial movement of the injector core relative to the injector body.

An injector includes an injector body having an upper portion defining a top surface. An injector core is received through the upper portion. The injector core has an interfacing surface that is disposed adjacent and raised with respect to the top surface. A cover member is disposed on the upper portion of the injector body. The cover member has a top wall disposed proximal to the top surface of the injector body and defining an aperture for receiving the injector core therethrough, a side wall extending from the top wall, and a lip that is disposed at an end of the side wall. The lip is adapted to be attached to a circumferential wall of the injector body through a snap-fit connection. Upon attachment, the top wall presses on the interfacing surface of the injector core to restrict an axial movement of the injector core relative to the injector body.

A reductant dosing unit is disclosed, including a fluid injector having a fluid inlet and a fluid outlet. A flange is disposed proximal to the fluid outlet of the fluid injector and configured to secure to a boss associated with an exhaust path of an internal combustion engine. The flange has a largely flat body portion with a through-bore in fluid communication with the fluid outlet of the fluid injector. The flange further includes an extension which extends from the body portion toward the fluid injector and which is connected to thereto. A thermal isolator is disposed between the fluid outlet of the fluid injector and the flange. The connection between the extension of the flange and the fluid injector includes a hermetic seal, preventing exhaust gases in the exhaust path from passing between the flange extension and the fluid injector. The thermal isolator is only used as a support and thermal isolator.

An acoustic damper includes a low porosity layer section and a housing. The low porosity layer section is formed in a liner of a gas turbine combustor and has an arrangement of elongated generally S-shaped slots formed therein. The housing has a plurality of feed apertures. The housing is coupled to the low porosity layer section thereby defining a cavity such that air outside the housing is configured to flow through the apertures and through the elongated generally S-shaped slots in the low porosity layer section, thereby transforming acoustic energy into thermal energy and aiding in providing an acoustic dampening effect for the gas turbine combustor during operation thereof.

A process for optimizing the consumption of reducing agent in the form of ammonia in an exhaust line including first and second selective catalytic reduction systems, the second system being arranged downstream of the first system, being spaced apart by a spacing, a surplus of unused ammonia passing via the exhaust line, the temperature in the exhaust line at the second system being measured or estimated. When the temperature at the second system exceeds a first maximum value, or when a calculated rate of temperature rise is greater than a predetermined rate of rise, with the proviso that the temperature at the second system is greater than a second maximum value that is less than the first maximum value, forced cooling is carried out in the spacing between the first and second systems.

An exhaust gas heat recovery system includes a housing assembly, a valve assembly and a heat exchanger. The valve assembly is disposed within the housing assembly and includes a shaft and a plate. The plate is rotatable between a first position whereat exhaust gas flow through a first fluid passageway is allowed and exhaust gas flow through a second exhaust gas passageway is prevented, and a second position whereat exhaust gas flow through the second fluid passageway is allowed and exhaust gas flow through the first gas passageway is prevented. The heat exchanger assembly includes a heater core having a working fluid circulating therein. The working fluid is in thermal communication with fluid in the heater core. The housing assembly includes first and second shells attached to each other at a joint. An axis of the shaft being at the joint of the first and second shells.

An exhaust gas heat recovery system includes a housing, a heat exchanger and a valve assembly. The valve assembly is disposed within the housing and includes a monolithic valve body, a moveable valve plate and a rotatable valve shaft. The valve body includes a bore, a valve seat surrounding the bore and trunnions integrally formed with the valve seat. The trunnions are diametrically opposed to each other and laterally extending outside of the housing. The valve plate coupled for rotation with the valve shaft between a first position allowing exhaust gas flow through the bore and the first exhaust gas passageway, and a second position allowing exhaust gas flow through the second exhaust gas passageway and preventing exhaust gas flow through the bore and the first exhaust gas passageway. The valve shaft being supported for rotation by the trunnions.

The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.

A system of forcibly regenerating a gasoline particulate filter may include an exhaust pipe connected to the engine; a catalyst apparatus mounted on the exhaust pipe; first and second intake lines; first and second electric superchargers disposed on the first and second intake lines; a bypass line connecting a first point of the first supercharger and a second point of the second supercharger to each other; a first intake valve disposed at a downstream of the first point of the first intake line; a second intake valve disposed at an upstream of the second point of the second intake line; a bypass valve disposed on the bypass line; and a regeneration air line connecting the first intake line or the bypass line between the first electric supercharger, the first intake valve, and the bypass valve to the exhaust pipe between the catalyst apparatus and the gasoline particulate filter.

Methods, systems, and vehicles that control the temperature of a device included in the vehicle are presented herein. The temperature of the device is controlled by ventilating the device with drivetrain air, such as transmission cooling air. In some embodiments, the device is at a greater temperature than the drivetrain air, which cools the device. In other embodiments, the device is at a lesser temperature than the drivetrain air, which heats the device. The drivetrain air is provided to the device through an exhaust duct coupled to the vehicle's transmission. The drivetrain exhaust air is preferably circulated by the transmission. The transmission may be a continuously variable transmission. The device may be an oxygen sensor that is coupled to an engine exhaust pipe. The oxygen sensor is thermally coupled to the engine exhaust and the engine exhaust pipe, which are at greater temperatures than the transmission exhaust air.