This Autoworld Honda Motor Co., Ltd., today announced it has developed a next-generation diesel
engine that reduces exhaust gas emissions to a level equal to a gasoline engine.
Honda's next-generation diesel engine employs a revolutionary NOx catalytic converter that enables a great reduction in NOx emissions sufficient to meet stringent U.S. Environmental Protection Agency (EPA) Tier II Bin 5 emissions requirements (based on Honda's internal calculations). This catalytic converter
features the world's first innovative system using the reductive reaction of
ammonia generated within the catalytic converter to "detoxify" nitrogen oxide
(NOx) by turning it into harmless nitrogen (N2).The new catalytic converter
utilizes a two-layer structure: one layer adsorbs NOx from the exhaust gas and
converts a portion of it into ammonia, while the other layer adsorbs the
resulting ammonia, and uses it later in a reaction that converts the remaining
NOx in the exhaust into nitrogen (N2). Ammonia is a highly effective reagent for
reducing NOx into N2 in an oxygen-rich, lean-burn atmosphere. This ability to
generate and store ammonia within the catalytic converter has enabled Honda to
create a compact, lightweight NOx reduction system for diesel engines. The
system also features enhanced NOx reduction performance at 200-300oC, the main
temperature range of diesel engines.Honda designed the catalytic converter for
use with its 2.2 i-CTDi diesel engine, which has earned widespread praise for
quiet, clean operation and dynamic performance since its introduction in 2003 on
the European Accord model.By further advancing combustion control, the 2.2
i-CTDi delivers cleaner exhaust to the NOx catalytic converter. Honda achieved
this by optimizing the combustion chamber configuration, reducing fuel injection
time with a 2,000-bar common rail injection system and boosting the efficiency
of the EGR (exhaust gas recirculation) system. Thanks to these improvements,
Honda has reduced the amount of NOx and soot normally found in engine exhaust,
while increasing power output.Along with developing superior technology for
cleaning exhaust gas, Honda plans to address other technical challenges in
developing clean diesel engines, such as handling diesel fuels with different
cetane numbers and meeting U.S. On-Board Diagnostic System requirements. Honda
plans to introduce its next-generation diesel engine in the U.S. within three
years.Gasoline engines presently employ three-way catalytic converters that
offer NOx reduction rates as high as 99 percent, but this performance is
possible only at the stoichiometric air-fuel ratio. In the oxygen-rich
environment of a lean-burn diesel engine, three-way catalytic converters only
reduce NOx levels by approximately 10 percent. Honda's new catalytic converter
efficiently reduces NOx in a lean-burn atmosphere, enabling diesel engines to
rival gasoline engines in cleanliness. The compact system is also easy to
install in passenger vehicles.
It always helps when new engine technology begins to make its way out of the experimental faze into the production side of things, but I would like to see some of this in Hondas entry level cars such as the Civic, I think the time is ripe for the automakers to try another assault on the diesel market in north America.
It hasn’t worked in the past, and it seem like the only car maker to try is Volkswagen but people today may be more willing to accept diesels than in the past.
But they won’t know unless it’s put out in the market and advertised.
Joe.
engine that reduces exhaust gas emissions to a level equal to a gasoline engine.
Honda's next-generation diesel engine employs a revolutionary NOx catalytic converter that enables a great reduction in NOx emissions sufficient to meet stringent U.S. Environmental Protection Agency (EPA) Tier II Bin 5 emissions requirements (based on Honda's internal calculations). This catalytic converter
features the world's first innovative system using the reductive reaction of
ammonia generated within the catalytic converter to "detoxify" nitrogen oxide
(NOx) by turning it into harmless nitrogen (N2).The new catalytic converter
utilizes a two-layer structure: one layer adsorbs NOx from the exhaust gas and
converts a portion of it into ammonia, while the other layer adsorbs the
resulting ammonia, and uses it later in a reaction that converts the remaining
NOx in the exhaust into nitrogen (N2). Ammonia is a highly effective reagent for
reducing NOx into N2 in an oxygen-rich, lean-burn atmosphere. This ability to
generate and store ammonia within the catalytic converter has enabled Honda to
create a compact, lightweight NOx reduction system for diesel engines. The
system also features enhanced NOx reduction performance at 200-300oC, the main
temperature range of diesel engines.Honda designed the catalytic converter for
use with its 2.2 i-CTDi diesel engine, which has earned widespread praise for
quiet, clean operation and dynamic performance since its introduction in 2003 on
the European Accord model.By further advancing combustion control, the 2.2
i-CTDi delivers cleaner exhaust to the NOx catalytic converter. Honda achieved
this by optimizing the combustion chamber configuration, reducing fuel injection
time with a 2,000-bar common rail injection system and boosting the efficiency
of the EGR (exhaust gas recirculation) system. Thanks to these improvements,
Honda has reduced the amount of NOx and soot normally found in engine exhaust,
while increasing power output.Along with developing superior technology for
cleaning exhaust gas, Honda plans to address other technical challenges in
developing clean diesel engines, such as handling diesel fuels with different
cetane numbers and meeting U.S. On-Board Diagnostic System requirements. Honda
plans to introduce its next-generation diesel engine in the U.S. within three
years.Gasoline engines presently employ three-way catalytic converters that
offer NOx reduction rates as high as 99 percent, but this performance is
possible only at the stoichiometric air-fuel ratio. In the oxygen-rich
environment of a lean-burn diesel engine, three-way catalytic converters only
reduce NOx levels by approximately 10 percent. Honda's new catalytic converter
efficiently reduces NOx in a lean-burn atmosphere, enabling diesel engines to
rival gasoline engines in cleanliness. The compact system is also easy to
install in passenger vehicles.
It always helps when new engine technology begins to make its way out of the experimental faze into the production side of things, but I would like to see some of this in Hondas entry level cars such as the Civic, I think the time is ripe for the automakers to try another assault on the diesel market in north America.
It hasn’t worked in the past, and it seem like the only car maker to try is Volkswagen but people today may be more willing to accept diesels than in the past.
But they won’t know unless it’s put out in the market and advertised.
Joe.
No comments:
Post a Comment