|Ricardo’s separate, internal ACTION development is targeting low-emission diesels. Click to enlarge. Source: Ricardo (DEER 2005)|
Ricardo announced today that the company is working in collaboration with a global manufacturer to develop and to demonstrate an advanced diesel technology capable of achieving US Super Ultra-Low Emission (SULEV) and Tier 2 Bin 2 requirements.
Started in late 2005, early project focus has been on developing technologies to deliver engine-out exhaust emissions (without NOx aftertreatment) that achieve stringent Tier 2 Bin 5 emission requirements (0.07 g/mi NOx), delivering NOx levels approximately one-sixth those currently proposed for Euro 5. These technologies include advanced air handling systems, two-stage boosting, advanced exhaust gas recirculation and application of closed-loop cylinder pressure-based engine controls.
Tier 2 Bin 5 is the “50-state diesel” standard—matching California requirements—for light duty vehicles.
In parallel, work is being carried out to develop an advanced exhaust aftertreatment system. Combining advanced aftertreatment with engine optimization will allow demonstration of a system capable of meeting the requirements of US SULEV, Tier 2 Bin 2 (0.02 g/mi NOx), thereby achieving NOx levels less than one-tenth of currently proposed Euro 5 levels.
|Tier 2 Emission Standards, Bins 5 and Below, g/mi|
|Bin#||50,000 miles (Intermediate life)||120,000 miles (Full life)|
|* Average manufacturer fleet NOx standard is 0.07 g/mi|
Throughout the project, a major emphasis has been placed on achieving low emissions under transient conditions to maintain or improve the “fun to drive” responsiveness of the engine without deteriorating emissions performance. The engine is being developed with a competitive power rating of 65kW/liter to meet US emissions regulations for both sea level and altitude compliance.
These advanced diesel technologies will be integrated into a vehicle capable of meeting the lowest current worldwide exhaust emissions standard (SULEV, Tier 2 Bin 2) without compromising customer appeal, while maintaining significant fuel efficiency (therefore CO2) advantage over current US equivalent gasoline products.
By applying a systems engineering approach, combining engine-out optimization with advanced aftertreatment, Ricardo and its partner expect to deliver a highly cost-effective.
|Ricardo’s ACTION Level 3 engine corresponds to the engine-out emissions target for the current engine under development. Click to enlarge. Source: Ricardo (DEER 2005)|
Ricardo has been working on its own internal ACTION (Advanced Combustion Technology to Improve engine-Out NOx) for several years already. A Tier 2 Bin engine-out NOx level as described in the project above maps to Ricardo’s internal ACTION Level 3 engine applied in a <3,500-pound passenger car.
Through the ACTION work, Ricardo has determined that highly pre-mixed cool combustion offers a practical approach to significant engine-out NOx reduction.
Ricardo is a global deep-content engineering and management consulting partner for automotive, commercial vehicle and related industry sectors. The company provides complete engineering services from strategy through product concept, design release and validation, and all phases of the product lifecycle. Ricardo technical expertise lies in powertrain and driveline, vehicle engineering, hybrid and fuel cell technologies, controls and electronics, niche volume manufacturing and advanced simulation software.
Ricardo and GM have been developing an advanced diesel engine control (ADEC) system designed to enable consistent achievement of very low emissions levels through closed loop control of the combustion process. An EGR Cooler with bypass is part of that development, which the partners will demonstrate on a 1.9-liter engine. (Earlier post.)
Ricardo recently worked with JCB on the DIESELMAX breaking the 200mph barrier in UK testing in preparation for a run on the Bonneville Salt Flats. JCB designed the 750hp engines of the DIESELMAX in partnership with Ricardo during the course of the past 18 months.
Ricardo also recently announced a partnership with Bosch on developing an advanced turbo-charged, direct injection gasoline engine system. The prototype system, DI BOOST, will offer superior performance and fuel economy while also being capable of achieving super ultra low emission vehicle (SULEV) standards. (Earlier post.)