摘要:
Provided are an exhaust gas purifying catalyst having high catalytic activity enabling combustion of PM at low temperatures and free from any risk of dispersal of metal elements arousing concern about environmental load, an exhaust gas purification device and filter having a high combustion efficiency of PM, and a method for producing the catalyst. An exhaust gas purifying catalyst contains: an oxide containing at least one element (A) selected from alkali metals and alkaline earth metals and at least one element (B) selected from Zr, Si, Al, and Ti; and a cesium salt.
摘要:
An operation control apparatus for an internal combustion engine includes: an exhaust emission purifier; a fuel supplying valve for supplying fuel to an exhaust passage; ignition means for igniting the fuel supplied; a warm up determining section for determining whether or not the purifier need be warmed; an exhaust heating determining section for determining whether or not the engine is in an operational state in which the fuel should be ignited and burned; an exhaust heating predicting section for predicting the transition from the operational state in which the fuel should not be ignited and burned to an operational state in which the fuel should be ignited and burned; and a heat generation temperature setting section for setting the temperature of a heating portion of the ignition means based on the result by the heating determining section and the predicting section.
摘要:
An exhaust gas heating apparatus (31) according to the present invention comprises an expansion chamber (37) having an inflow port (42) and an outflow port (43), a fuel supplying element (38) for supplying fuel into the expansion chamber, a fuel diffusing plate (39) for dispersing the fuel in the expansion chamber, and ignition means (40) for igniting the fuel in the expansion chamber, wherein an exhaust passage (28) communicated with the inflow port is connected tangentially to a circular peripheral surface (37a) of the expansion chamber, an axis (A) thereof is deviated from an axis (B) of the exhaust passage communicated with the outflow port, and the fuel diffusing plate extends along the peripheral surface of the expansion chamber from close proximity of the inflow port in such a manner as to form a partition between the inflow and outflow ports.
摘要:
A method and an arrangement are provided for reducing warm-up emissions in the exhaust system of a direct-injection internal-combustion engine. The method includes the steps of adjusting a lean air/fuel mixture for the engine-related combustion; implementing a late injection into the exhaust gas during the exhaust cycle of the internal-combustion engine, so that the exhaust gas contains an essentially stoichiometric air/fuel mixture; and igniting the stoichiometric air/fuel mixture contained in the exhaust gas in the proximity of a catalyst device for heating up the catalyst device.
摘要:
The present invention relates to a method and a corresponding system for catalytic aftertreatment of the exhaust gas of an internal-combustion engine. Two spatially separate catalyst devices are provided in the exhaust gas system. The first of these catalyst devices is arranged in a position close to the engine, and the second catalyst device is arranged in a position away from the engine. An exothermal reaction is caused to take place during warm-up for heating the second catalyst device.
摘要:
A method for treating engine emissions and a device for treating engine emissions and dampening engine noise are provided. The invention provides for multiple zones of reaction so as to treat reducible emission components by providing a low oxygen, relatively cool reducing zone and also to treat oxidizable emission components by providing a relatively high oxygen, hotter oxidizing zone. A feature of the invention includes a heating means situated adjacent to or embedded into an oxidizing catalyst or an oxidation zone of a three-way catalyst.
摘要:
An electronically controlled exhaust gas purifying system for use with an internal combustion engine of a motor vehicle including not only a catalytic converter but also an auxiliary thermal reactor which is located upstream of the catalytic converter and by which exhaust gases emitted from the engine is re-combusted to the extent that the catalytic converter is not destroyed or damaged by the residual unconsumed compounds in exhaust gases discharged from the thermal reactor. The system is provided with an electronic control means for shutting off the flow of secondary air to be mixed with the exhaust gases emitted from the engine both when at least one of the temperatures of the catalytic converter and the thermal reactor rises above a critical value at which they would be destroyed or damaged, and when the engine is under cranking operation. The electronic control means retards the spark in order to heat the exhaust gases when the temperature of the reactor falls to its reaction commencement temperature. In the event that the rate of temperature rise of the thermal reactor exceeds a threshold value, the electronic control means does not retard the spark even if the temperature of the thermal reactor falls to the reaction commencement temperature, but then retards the spark when the temperature of the thermal reactor falls below a predetermined value which is set lower than that of the reaction commencement temperature.
摘要:
An exhaust purifying apparatus for an internal combustion engine according to the present invention comprises an exhaust purifying catalyst provided in an exhaust passage, a burner device provided upstream of the exhaust purifying catalyst and generating a heated gas for heating the exhaust purifying catalyst, the burner device including at least a glow plug and a fuel injection nozzle injecting fuel toward the glow plug, and a heat spot member as a heat accumulator provided downstream of the burner device and upstream of the exhaust purifying catalyst.
摘要:
The invention relates to an exhaust gas regenerator (VG) comprising an exhaust gas catalyst (KAT). According to the invention, the hot-operated catalyst (KAT) is located adjacent to a diffusion membrane (MEM) that is resistant to high temperatures and is, in turn, adjacent to a regenerated gas collector (RS) that is maintained at a lower pressure (pr) than the respectively prevailing inner pressure (pk) in the catalyst, and the regenerated gas (RG) produced is supplied as a complementary fuel to a combustion device (COMB) mounted upstream of the generator (1) and/or is used otherwise in a chemico-energetic manner.
摘要:
An exhaust gas purifying system (1) having a continuous regeneration DPF (3) installed in the exhaust passage (2) of a diesel engine (E) provided with a glow plug and a regeneration control means for regenerating the continuous regeneration DPF (3), is constituted so that the regeneration control means performs retarded injection or post-injection in the control of fuel injection into a cylinder (13) and heating the inside of the cylinder (13) by the glow plug (16) for regenerating the continuous regeneration DPF (3). Thereby, when raising the temperature of exhaust gas in the regeneration of the continuous regeneration DPF (3), it is possible to prevent the generation of white fumes and misfire and to raise the exhaust gas temperature efficiently and substantially. Therefore, it is possible to prevent the temperature of a catalyst and a DPF from being abnormal high and to prevent the deterioration and the melt down of the catalyst.