초록 ▼

The invention relates to a method for interrupting the regeneration of a particulate filter in the exhaust gas system of a diesel engine to protect the filter against destructive overheating. In this case, an electronic control unit calculates a desired mass air mass flow rate (MAFdes) based on engi

The invention relates to a method for interrupting the regeneration of a particulate filter in the exhaust gas system of a diesel engine to protect the filter against destructive overheating. In this case, an electronic control unit calculates a desired mass air mass flow rate (MAFdes) based on engine speed (n), fuel supply (Fq) to the engine, and air/fuel ratio (A/Fdes). A mass air flow rate regulator controls the position of an exhaust gas recirculation (EGR) valve as a function of the difference between the desired mass air mass flow rate (MAFdes) and the measured mass air flow rate (MAFmes). An intake manifold absolute pressure controller adjusts the position of an intake throttle valve as a function of the difference between the measured intake manifold absolute pressure (MAPmes) and the modified intake manifold absolute pressure (MAPmod). MAPmodis determined by a coordination module, based on the mass air flow rate error and other parameters.

대표청구항 ▼

The invention relates to a method for interrupting the regeneration of a particulate filter in the exhaust gas system of a diesel engine to protect the filter against destructive overheating. In this case, an electronic control unit calculates a desired mass air mass flow rate (MAFdes) based on engi

The invention relates to a method for interrupting the regeneration of a particulate filter in the exhaust gas system of a diesel engine to protect the filter against destructive overheating. In this case, an electronic control unit calculates a desired mass air mass flow rate (MAFdes) based on engine speed (n), fuel supply (Fq) to the engine, and air/fuel ratio (A/Fdes). A mass air flow rate regulator controls the position of an exhaust gas recirculation (EGR) valve as a function of the difference between the desired mass air mass flow rate (MAFdes) and the measured mass air flow rate (MAFmes). An intake manifold absolute pressure controller adjusts the position of an intake throttle valve as a function of the difference between the measured intake manifold absolute pressure (MAPmes) and the modified intake manifold absolute pressure (MAPmod). MAPmodis determined by a coordination module, based on the mass air flow rate error and other parameters. e device of claim 1 wherein the narrowband port is connected to an existing telephone wiring plant at the customer site. 4. A broadband communication network for distributing combined narrowband and broadband signals comprising: a central office connected to at least one multi-media service provider and to a switched telephone system, the central office comprising narrowband and broadband signal encoders and decoders for combining the narrowband and broadband signals on a single network distribution line; a network device connected to the central office for providing a single twisted-pair copper cable drop feed to a customer site; and an interface device connected to a wiring plant at the customer site for receiving the combined narrowband and broadband signals from the single twisted-pair copper cable drop feed, wherein the interface device comprises: a frequency splitter for separating the broadband signals and narrowband signals for output on separate wiring plants located at the customer site; a low pass filter connected to the frequency splitter and arranged to filter the separated narrowband signals before output from the interface device as well as reduce feedback of EMI and other radio interference, which is electromagnetically coupled onto the narrowband wiring plant within the customer site, from entering the network distribution line; and a high pass filter connected to the frequency splitter and arranged to filter the separated broadband signals before output from the interface device as well as reduce feedback of EMI and other radio interference, which is electromagnetically coupled onto the broadband wiring plant within the customer site, from entering the network distribution line. 5. The network of claim 4 wherein the network device comprises a universal service access multiplexer. 6. The network of claim 4 wherein the separated and filtered narrowband signals are output from the interface device on a copper pair wire. 7. The network of claim 4 the separated and filtered narrowband signals are output from the interface device on an existing telephone wiring plant at the customer site. 8. The network of claim 4 wherein the separated and filtered broadband signals are output from the interface device on a twisted-pair copper cable. 9. The network of claim 4 wherein the separated and filtered broadband signals are output from the interface device on a Category 5 twisted-pair copper cable. 10. A method for interfacing a customer site to a VDSL based communication network providing combined narrowband and broadband signals on a single distribution line, the method comprising: receiving the combined narrowband and broadband signals at the customer site from a single twisted-pair copper drop feed; splitting the narrowband and broadband signals into separate output signals; outputting low pass filtered narrowband signals to a narrowband wiring plant within the customer site; outputting high pass filtered broadband signals to a broadband wiring plant within the customer site; low pass filtering feedback EMI and other radio interference, which is electromagnetically coupled onto the narrowband wiring plant within the customer site, from entering the VDSL based communication network; high pass filtering EMI and other radio interference, which is electromagnetically coupled onto the broadband wiring plant within the customer site, from entering the VDSL based communication network. 11. The method of claim 10 further comprising reducing signal interference on the separated and filtered broadband signals by outputting the signals on a twisted-pair copper cable. f data from the received frame's header. A link interface device is also featured. The link interface device includes a data transmitting and receiving unit, frame type circuitry, and frame modification circuitry. The data transmitting and receiving unit couples the device to an inter-switch link to transmit and receive data frames on the link. The frame type circuitry can receive data frames from the transmitting and receiving unit and can determine whether a payload segment in the received data frame is an encapsulated frame. The frame modification circuitry is coupled to the frame type circuitry and can modify frame header segment data when the payload segment in the received frame is an encapsulated frame.