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View All Press Releases| SED2011 | 13 Apr 2010 |
Cummins Offers an Additional Four Tier 4i Compliant Engines
Cummins is upgrading its existing four cylinder QSB3.3 and QSB4.5 engines to Tier 4 interim/Stage IIIA emissions and noise compliance. At the same time the firm is offering all-new engines, the QSX11.9 and QSX15 Heavy Duty engines, which also have compliance with Tier 4 interim/Stage IIIA emissions and noise regulations. The company will be showing these new engines next year at SED.
These four engines come with after treatment systems to suit off-highway installations. The QSB3.3 and QSB4.5 engines are aimed at the 56-119kW power output range and have the same external dimensions to the existing Tier 3 units, while the new QSX engines offer power outputs from 224-447kW.
A comprehensive field-testing programme has been carried out to ensure that these new engines will meet requirements. Over 20,000 operating hours have been logged with the test engines in an array of installations, making this the biggest field trial Cummins has ever carried out. Company spokesperson Kevan Browne said, “We’ve had extensive field-testing on Tier 4 engines with customers. Every single operator said the new engines were cleaner, quieter, more fuel-efficient and more responsive."
Although the QSB engines are the same size as the earlier versions Cummins has fitted new air filters and exhausts. The two QSB engines feature exhaust gas recirculation (EGR) systems as well as particulate aftertreatment technology, variable flow turbochargers and compact Direct Flow air cleaners. The two QSX units feature the firm’s innovative XPI fuel system technology, which has been developed in partnership with Scania. This injection system is complemented by variable geometry turbochargers that match engine speed and load and these diesel are also fitted with Direct Flow air cleaners, as well as integrated sensors so measure temperature and pressure and allow optimum airflow.
Both the updated QSB and new QSX engines are said to offer gains in fuel efficiency of 5% on average, across a range of duties and installations. There are also cooling modifications for these EGR-equipped diesels. Cummins already offers the QSB6.7 and QSL9 mid-range engines in Tier 4 Interim/Stage IIIA configuration.
Cummins
Yarm Rd
Darlington
Co Durham
DL1 4PW
UK
Samantha Gravells