New engine from Cummins

By Colin Windell

Cummins Africa Middle East is to launch a new engine into the local market later this year that is specifically designed for medium and heavy duty, inner and intercity transit operations – a flexible power choice with a 8,9 litre configuration.

Cummins Sales and Business Development Manager, Bo Fu, says that with a lighter weight than competitive engines, operators benefit from high performance, strong acceleration, and lower operating costs, all with the reliability and durability expected from Cummins.

Cummins ISL features targeted piston cooling, roller followers, and articulated pistons to increase durability. A combination full-flow and bypass oil filter extends piston ring and bearing life. Together with mid-stop cylinder liners, this also means that the Cummins ISL is easier to rebuild.

“The ISL has been designed for medium and heavy-duty structural strength. It incorporates design features associated normally with larger Cummins engines,” he says. “An enhanced camshaft and roller cam followers, a viscous damper, and high-capacity lube system enable Cummins to maintain high durability and reliability, in addition to a high power-to-weight ratio.”

A high-efficiency lube cooler lowers oil temperatures for longer life, while Six Sigma design practices have resulted in enhanced reliability for individual components and total engine design. A crankcase ventilation system with a coalescing filter practically eliminates oil carryover. Coolant flow has been optimised and balanced, thereby effectively reducing cylinder temperatures.

Weighing in at just over 800 kg, the Cummins ISL offers significant benefits for payload-critical and high-bulk volume operations. With high levels of torque for an engine of this size, the Cummins ISL provides a flexible power solution for premium rigids, lightweight tractor units, higher-powered buses and coaches, and specialist vehicle applications.

Cummins ISL incorporates technologies and subsystems such as a cooled EGR, a VG Turbo, a high-pressure common rail fuel injection system, and a Cummins diesel particulate filter. These technologies have been used in Cummins transit bus engines for years. The VG Turbo, for example, adjusts airflow constantly to reduce turbo lag, in addition to providing for smooth acceleration.

The fact there is only a single moving part in the hot exhaust stream means that the Cummins ISL is reliable and durable.

“We have produced more engines with particulate filters than any other manufacturer, earning a reputation for low maintenance and trouble-free operation,” Fu notes.

Ratings from 186 kW to 246 kW provide cater for any transit bus, from 8,8 m through to 18 m articulated buses. Cummins ISL is also available in conventional driveline and hybrid-ready configurations.

“Regardless of your specific requirements, the Cummins ISL is the right engine for every bus, every route,” says Fu.