[home][rumors and news][model release matrix][dealer network][desktop calendar][exhaust notes][tov forums][links][search][sponsors][garage][login]

Tire Rack Upgrade Garage
 Search for a Dealer:
 Canadian Flag US Flag
 Honda Acura
 ZIP  
Acura
There are currently no active Acura promotions
Honda
There are currently no active Honda promotions
SPIED IN EUROPE! Civic Type R refresh
More.......................
American Honda Sets New June Sales Records on Strength of Light Trucks
More.......................
Honda reveals refreshed 2019 HR-V and Pilot
More.......................
Acura TLX GT wins class and places 3rd overall at 2018 Pikes Peak International Hill Climb
More.......................
Spied on the Street! 2019 Pilot and Pilot PHEV mule
More.......................
All-New 2019 Honda Insight Brings Style, Sophistication and 55 mpg City Rating
More.......................
It's Official: Honda to supply Red Bull Racing in Formula One from 2019
More.......................
Will the next-gen TLX bring back double wishbones? Or a Plugin Hybrid model?
More.......................
RDX --> Re: New RDX vs NX Infomercial
Join Discussion......
General Talk --> Re: Honda new teaser ad!!!!!!!!!!!!!!!!!
Join Discussion......
Professional Motorsports --> Re: MotoGP - Sachsenring TT (you should watch)
Join Discussion......
ILX --> Re: 2019 ILX
Join Discussion......
Type R --> Re: Type-R Fascia Changes spotted at Nurburgring
Join Discussion......
Type R --> Re: DC-R
Join Discussion......
Fuel Cell Technology --> Re: Marauding Mirais
Join Discussion......
Type R --> Re: Such a damn nice car
Join Discussion......
Today's Reading Links --> Re: Munro says Model 3 has >30% gross margin
Join Discussion......
Hot Deals --> Great lightning deal on Anker ROAV C1 Pro (2k resolution) dashcam - $75
Join Discussion......
Civic --> Re: 2017 Civic Si 360whp One Take
Join Discussion......
RDX --> Re: 3rd Generation Acura RDX Reviews
Join Discussion......
Civic --> 2001 Honda Civic non-vtec to vtec engine switch
Join Discussion......
Repair and Maintenance --> 2001 Honda Civic non-vtec to vtec engine switch
Join Discussion......
Repair and Maintenance --> 2001 Honda Civic non-vtec to vtec engine switch
Join Discussion......
Honda Develops Next-Generation Clean Diesel Engine
 Date: September 24, 2006 21:58
 Submitted by:  JeffX
 Source: Honda EU Press Release
 Credibility Rating: Not Specified


Capable of Meeting Stringent Tier II Bin 5 Emissions Requirements in the U.S.

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 200300C, 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%, 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%. 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.

  • Reaction Mechanism of the New NOx Catalytic Converter for Diesel Engines


    1. During lean burn operation, the NOx adsorbent in the lower layer adsorbs NOx from the exhaust gas.
    2. As needed, the engine management system adjusts the engine air-fuel ratio to rich-burn, wherein the NOx in the NOx adsorption layer reacts with hydrogen (H2) obtained from the exhaust gas to produce ammonia (NH3). The adsorbent material in the upper layer temporarily adsorbs the NH3.
    3. When the engine returns to lean-burn operation, NH3 adsorbed in the upper layer reacts with NOx in the exhaust gas and reduces it to harmless nitrogen (N2).

  • Exhaust Gas Cleaning System Configuration



  • Last edited by JeffX on May 07, 2008 16:32

    Click Here to Submit Your Comments

    Viewing Threshold (What is this?)

    [fancy] [flat] [simple]
    Subject Thread Originator Replies Last Post
      Who gives a shit, when thell are they going to make my V8!?!
    97AcuraCL 11
      Cool power bulge!!! NT
    94sir 1
      Diesel in Fit
    PK 10
      2000 bar common rail
    danielgr 11
      Diesel a better alternative than hybrid...?
    ItsAllAboutHonda 14
      Putting it on CRV with 6 speed manual
    gt 3
      Hood scoop!
    6SPDTL 0
      Finally!
    6SPDTL 0
      Ring me up for a 2008 Accord diesel
    Janizary 1
    First Drive: 2019 Honda Insight
    Read Article....................
    2019 Honda Insight PR Photo Gallery
    Read Article....................
    First Drive: 2019 Acura RDX
    Read Article....................
    2019 Acura RDX Features & Specifications
    Read Article....................
    PR Photo Gallery - 2019 Acura RDX Advance
    Read Article....................
    PR Photo Gallery - 2019 Acura RDX A-Spec
    Read Article....................
    Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
    Copyright © 2018 Velocitech Inc. All information contained herein remains the property of Velocitech Inc.
    The Temple of VTEC is not affiliated with American Honda Motor Co., Inc. TOV Policies and Guidelines - Credits - Privacy Policy
    30