摘要:
An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas system includes an exhaust gas conduit, a generator, a vehicle electrical system, a primary energy storage device, a rechargeable secondary energy storage device, an electrically heated catalyst (“EHC”) device, and a control module. The primary energy storage device is selectively connected to the generator. The primary energy storage device has a threshold state of charge (“SOC”). The rechargeable secondary energy storage device is selectively connected to the generator and the vehicle electrical system. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device has an electric heater that is selectively connected the generator for receiving energy and a selectively activated catalyst that is heated to a respective light-off temperature.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a generator, an electrically heated catalyst (“EHC”) device, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The generator operates at a generator speed to produce electrical power. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device includes a monolith structure that is divided into a plurality of segments that define discrete resistive paths. The resistive paths are selectively connected to the generator for receiving electrical power. The control module is in communication with the EHC device, the generator, and the internal combustion engine. The control module includes control logic for determining the generator speed.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas system includes an exhaust gas conduit, a generator, a vehicle electrical system, a primary energy storage device, a rechargeable secondary energy storage device, an electrically heated catalyst (“EHC”) device, and a control module. The primary energy storage device is selectively connected to the generator. The primary energy storage device has a threshold state of charge (“SOC”). The rechargeable secondary energy storage device is selectively connected to the generator and the vehicle electrical system. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device has an electric heater that is selectively connected the generator for receiving energy and a selectively activated catalyst that is heated to a respective light-off temperature.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a generator, an electrically heated catalyst (“EHC”) device, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The generator operates at a generator speed to produce electrical power. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device includes a monolith structure that is divided into a plurality of segments that define discrete resistive paths. The resistive paths are selectively connected to the generator for receiving electrical power. The control module is in communication with the EHC device, the generator, and the internal combustion engine. The control module includes control logic for determining the generator speed.
摘要:
A power system and a method for energizing an electrically heated catalyst are provided. The system includes a controller that generates a first control signal to set a switching device to a first operational state if the first temperature level downstream of the catalyst is less than a threshold temperature level and the engine is being decelerated. The controller further generates a second control signal to induce a generator to output a second voltage if the first temperature level is less than the threshold temperature level and the engine is being decelerated, such that the second voltage is applied through the switching device in the first operational state to the catalyst to increase a temperature of the catalyst.
摘要:
A power system and a method for energizing an electrically heated catalyst are provided. The system includes a controller that generates a first control signal to set a switching device to a first operational state if the first temperature level downstream of the catalyst is less than a threshold temperature level and the engine is being decelerated. The controller further generates a second control signal to induce a generator to output a second voltage if the first temperature level is less than the threshold temperature level and the engine is being decelerated, such that the second voltage is applied through the switching device in the first operational state to the catalyst to increase a temperature of the catalyst.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided, and includes an exhaust gas conduit, an upstream selective catalytic reduction (“SCR”) device, an electrically heated catalyst (“EHC”) device, an oxidation catalyst (“OC”) device, a downstream SCR device, and a control module. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the upstream SCR device and is selectively activated to produce heat. The OC device is in fluid communication with the exhaust gas conduit, and is selectively heated by the EHC device. At least one of the EHC device and the OC device have a NOx adsorber catalyst disposed thereon for selectively adsorbing NOx below a threshold temperature and substantially releasing NOx above the threshold temperature.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided, and includes an exhaust gas conduit, an upstream selective catalytic reduction (“SCR”) device, an electrically heated catalyst (“EHC”) device, an oxidation catalyst (“OC”) device, a downstream SCR device, and a control module. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the upstream SCR device and is selectively activated to produce heat. The OC device is in fluid communication with the exhaust gas conduit, and is selectively heated by the EHC device. At least one of the EHC device and the OC device have a NOx adsorber catalyst disposed thereon for selectively adsorbing NOx below a threshold temperature and substantially releasing NOx above the threshold temperature.
摘要:
An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a flow-through container of absorbent particles, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The exhaust gas contains oxides of nitrogen (“NOx”) and water. The flow-through container of absorbent particles is in fluid communication with the exhaust gas conduit and configured to receive the exhaust gas. The flow-through container substantially adsorbs the water from the exhaust gas below a threshold temperature. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the flow through container, and is selectively activated to produce heat.
摘要:
A cold start NO2 generation system includes a catalyst control module that identifies a portion of a three-way catalyst that corresponds to a nitrogen dioxide zone. A diagnostic module determines a temperature in the nitrogen dioxide zone, and a fuel control module adjusts an air/fuel ratio based on the temperature in the nitrogen dioxide zone. A cold start NO2 generation method includes identifying a portion of a three-way catalyst that corresponds to a nitrogen dioxide zone. The method further includes determining a temperature in the nitrogen dioxide zone and adjusting an air/fuel ratio based on the temperature in the nitrogen dioxide zone.