Hatz Diesel develops bolt-on DPF for L and M series engines

Hatz has revised its three and four cylinder L and M series air-cooled engine packages to comply with emissions regulations by including a cooled EGR system, DOC and DPF with active regeneration. The exhaust after-treatment package can be remote-mounted, said Hatz, and brings a 2dB(A) reduction in exhaust noise to the air-cooled engine.

Hatz has boosted diesel engine efficiency with an all-new four-cylinder 2litre platform that combines low weight with low fuel consumption and meets Tier 4 Final/Stage IV emissions regulations without the need for a DPF. Called the 4H50TIC, the new engine uses two-valve cylinder head design to cut frictional losses, while opting for lower injection pressures of 1,800bar to contribute towards improved fuel efficiency.

Hatz’s Diesel’s 1D81 Hydro concept has been developed to offer a low noise level solution for applications using single-cylinder diesel engines. Still at prototype stage, the 667cc and 772cc capacity single-cylinder engine is a new variant of an existing Hatz engine design. As such, it uses common components from the Hatz range, but it differs with an all-new cylinder block and cylinder head design that includes a water jacket, allowing liquid cooling to be introduced.

Caterpillar’s industrial engines division is using the C7.1 as a common engine platform as a replacement for the C6.6 as it meets Tier 4 Final/Stage IV emissions regulations. It means the 7.1litre six-cylinder C7.1 offers power ratings from 116kW to 225kW in either single turbo or series turbo configurations, and adds an SCR catalyst and diesel exhaust fluid dosing system as part of the existing exhaust after-treatment process.