Low cost electric supercharger eliminates smoke from diesel engines

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Low cost electric supercharger smoke from diesel

Posted by Nikolai Kalenski on 28 2009

Smoke emissions by turbocharged diesel engines heavy load conditions as when accelerating from low speeds and other similar manoeuvres can be all but eliminated by a relatively and low cost electric supercharger automotive CO2 reduction specialist Power Technologies (CPT).


The of particulate emissions is a major for the off-highway segment of the commercial industry, which faces new international regulations in 2012, for the first time legislators assess the emissions of engines transient conditions. Until now the testing for such engines has steady state.

The particulate problem is caused by the being sized for maximum rather than transient says Nick Pascoe executive officer CPT. a transient event, the fuel system tries to deliver the demanded by injecting more but the turbocharger will be a few seconds with the lack of air causing rich combustion and lots of A fast-acting electric supercharger with the root cause of the by supplying more air earlier in the It can also help minimise the for expensive exhaust after-treatment.

accompanied by engineering director Guy will have the opportunity to the technical issues with delegates attending the 5th International Powertrain Conference organised by AVL at in Austria this week. The forum, held on 28-29 2009, provides a platform for experts and automotive engineers for trucks and buses, agricultural non-road commercial vehicles and machinery to exchange ideas.

The benefits of having a near air supply can be achieved by CPT s electric known as VTES or ‘variable enhancement system .

The technology an attractive solution for the industry of its low cost, low effort of application and low commercial risk. This is the case when compared twin sequential turbocharged which are unable to match the mass flow rate and corresponding torque response by VTES at low engine speeds.

VTES is a compact system fully integrated electronics s easy to install, says It dramatically increases the engine air density over the first few combustion cycles of a low speed operation, enabling real in both torque and emissions

Unlike mechanical superchargers and gas driven turbochargers, VTES independently of engine speed. Its low compressor accelerates from to a maximum of 70,000rpm in less 350 milliseconds. The system is highly and the intake charge boosting and torque enhancement is achieved typically in less than 250

MIA ELECTRIC Mia L – Electric L 18kW Auto

As well as avoiding the need for a sequential turbocharger, the VTES can help reduce the size and as well as minimising the uncertainty in strategies of using a diesel filter. VTES effectively an additional control that can be during vehicle calibration to particulate emissions and increase torque.

In a fixed speed torque at 1,250rpm, test data from a 3-cylinder 3-litre engine revealed a reduction of the under the smoke curve of 89 per and smoke opacity reduced 8.3 to 1.4 per cent. Over the NRTC cycle the associated smoke is virtually eliminated. The NRTC is a transient driving cycle for non-road diesel engines by the US EPA in cooperation with European authorities.

As well as reducing emissions, VTES technology can be applied for NOX control. As part of a low exhaust gas recirculation system it can sufficient EGR flow even a low pressure difference across the and rapid purging of EGR in the ducts and during high load

Future emission controls require increased use of exhaust gas even under higher load conditions, says Traditional high pressure EGR result in poor driveability, is an issue that can also be with VTES technology.

CPT s supercharger benefits from a decade of research and continuous development resulting in a robust and system.

Formed as a management funded by private venture the company is backed by a number of investors specialising in the energy and sectors. CPT s understanding of power and control software and how electrical can be applied to vehicle powertrains best defines its area of

MIA ELECTRIC Mia L – Electric L 18kW Auto
MIA ELECTRIC Mia L – Electric L 18kW Auto
MIA ELECTRIC Mia L – Electric L 18kW Auto

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