摘要:
The invention relates to a device for metering a liquid reducing agent into an exhaust gas system for the reduction of pollutants in the exhaust gas. The device comprises a metering valve and an adapter to be mounted on an exhaust gas pipe. The metering valve is connected to the adapter by a connector element, which has at least one metal sound absorber.
摘要:
The invention relates to a line feedthrough through a heating kettle cover of a heating kettle of a reducing agent tank. At least one line penetrates an opening of the heating kettle cover and is sealed by means of a sealing element. It is provided that the sealing element is configured as an elastic plug sealing stopper, which is inserted in a holder associated with the heating kettle cover in a sealing manner.
摘要:
A metering device for introducing liquid reducing agent into an exhaust gas pipe. A metering valve is supplied with contents from a working tank by a delivery unit and dispenses the tank contents in a discharge direction. The delivery unit establishes a negative pressure between the delivery unit and the metering valve when the delivery direction is reversed. The negative pressure causes gas to be drawn off through the metering valve against the discharge direction. The delivery direction is reversed by either a feed pump with a reversible effective direction or a feed pump and a repolarization valve which communicates with the feed pump and transposes an inlet and an outlet of the feed pump.
摘要:
The invention relates to a tank for storing a reducing agent, in particular a liquid reducing agent. The reducing agent reduces the nitrogen oxides from the waste gases of the internal combustion engine to nitrogen and water. The tank includes an external container in which an internal container is accommodated. A heating element is provided in the internal container and the liquid reducing agent can be removed by a removal device. The internal container is connected to the external container in such a way that the liquid reducing agent can flow out from the internal container into the external container.
摘要:
A device for introducing a liquid reducing agent into the exhaust gas of an internal combustion engine includes an injection device and a retaining device. By means of the latter, the injection device is retained at least indirectly in the vicinity of an exhaust gas conduit and a cooling device cools the retaining device. An intermediate portion is disposed between the retaining device and the injection device, and this portion at least regionally influences the heat flow between the injection device and the retaining device.
摘要:
The invention relates to a storage tank (12) of a metering system (10) for introducing a reducing agent (32) in an exhaust gas tract of an internal combustion engine. The storage tank (12) comprises at least one opening (50) for mounting components (20, 24) and openings (46, 48, 63) for filling and emptying as well as venting (62). All openings (46, 48, 50, 62) are arranged above a region of the storage tank (12) flooded by the reducing agent (32).
摘要:
The invention relates to a reservoir tank, particularly for receiving a reducing agent for metering into the exhaust gas tract of an internal combustion engine. A spill basin is accommodated in the hollow space of the reservoir tank. At the base region, the spill basin is radially and axially guided into a recess of the reservoir tank base.
摘要:
An SCR-injection unit includes an injector, a sleeve element for fixing the injector to a flange of an exhaust gas pipe, and a cooling body. According to the invention, the sleeve element has an elongated thin-walled connecting section, one axial end of which is indirectly connected to the flange of the exhaust gas pipe and the other axial end of which is indirectly connected to a supporting structure for the injector.
摘要:
The invention relates to a storage tank (12) of a metering system (10) for introducing a reducing agent (32) in an exhaust gas tract of an internal combustion engine. The storage tank (12) comprises at least one opening (50) for mounting components (20, 24) and openings (46, 48, 63) for filling and emptying as well as venting (62). All openings (46, 48, 50, 62) are arranged above a region of the storage tank (12) flooded by the reducing agent (32).
摘要:
The invention relates to a method for operating a metering valve arranged in an exhaust gas region of an internal combustion engine for metering a reagent or a precursor of a reagent, comprising a cooling device to prevent excess temperatures. The invention further relates to a device for carrying out the method. During metering breaks of the regular metering process, a targeted predetermined minimum amount is metered for the cooling of the metering valve, if required.