More muscle for Cat’s C9.3 engine as it heads for Stage V

Caterpillar’s industrial engines division has introduced a new version of its venerable C9.3 Acert engine. Badged the C9.3B, the new power unit retains its six-cylinder, 9.3litre format, but with the deletion of EGR, revised air handling, improved fuel injection and improved electronics, the engine is said to be ready to meet anticipated Stage V emissions regulations.

April 19, 2016 Read time: 1 min

C9.3B offers more power in a simpler package

178 Caterpillar’s industrial engines division has introduced a new version of its venerable C9.3 Acert engine. Badged the C9.3B, the new power unit retains its six-cylinder, 9.3litre format, but with the deletion of EGR, revised air handling, improved fuel injection and improved electronics, the engine is said to be ready to meet anticipated Stage V emissions regulations.

As a result, this new version with simplified architecture is lighter than the C9.3 Acert engine, yet produces 18% more power and 18% more torque, to deliver a peak output of 340kW at 2,200rpm and 2,081Nm of torque at 1,400rpm.

Eliminating EGR has eased the load on cooling pack requirements, said the company, while helping to reduce the size of the DPF and SCR aftertreatment package by up to 30%. With revised electronics, the C9.3B needs just one ECM compared to the three ECM’s required to run the C9.3 Acert engine.

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Cummins ditches cooled EGR on its latest QSM12

Cummins has taken a major leap forward with engine design as it ditches cooled exhaust gas recirculation for its newest heavy-duty six-cylinder engine platform launched at bauma – the 12-litre QSM12. As its Tier 4 Final/Stage 4 engine solution in the 250-383kW sector, the QSM12 benefits from higher efficiency air handling and an advanced in-cylinder combustion process, allowing a return to using a straightforward wastegated turbocharger.

February 10, 2012

Engine manufacturers meeting emissions deadlines

Engine manufacturers have had to jump through regulatory hoops in recent years, meeting requirements for diesels with ever cleaner exhaust emissions. When this programme was first proposed, many believed the final aims could not be achieved. However on January 1st 2011, the Tier 4 Interim/Stage IIIB emissions regulations will come into force in North America and Europe and all the major diesel manufacturers will have suitable products at the ready. The Tier 4 Interim/Stage IIIB emissions regulations require