Liebherr adds compact, powerful diesel engine to line-up

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Liebherr has added a powerful third diesel engine model to its line-up, which it launched at Agritechnica 2017.

The third model of the company’s new diesel engine generation, the D964, is a four-cylinder, 9-liter unit that generates a maximum torque of 1,700Nm at 1,400rpm to achieve a power output of 300kW (402hp).

A Liebherr spokesperson said, “With its heavy-duty equipment, it is ideally suited for use in off-highway applications with frequent load and engine speed variations. It has wet-running cylinder liners for optimal cooling, an extremely robust turbocharger design, and high protection class cable harness and connectors.”

Three optional auxiliary outputs enable multiple deployment possibilities, with up to 665Nm output torque possible on the main auxiliary output.

To ensure low-vibration operation, the compact four-cylinder engine is fitted with a balance shaft, which compensates the dynamic forces. The D964 therefore runs significantly more quietly than other comparable four-cylinder engines, with values more akin to those of a six-cylinder engine.

To facilitate servicing and maintenance work, attention was paid to ensuring a high percentage of identical parts across the wide engine range when developing the new products, and to easy service point accessibility. A new design for the crankcase ventilation also leads to extended servicing intervals.

Like the D956 and D966 six-cylinder engines presented early this year, the D964 belongs to a new generation of engines, which not only fulfils the demanding EU Stage V exhaust emission standards, but on account of the modular exhaust gas aftertreatment system, can also be used in less strictly regulated markets.

For Stage V, the Liebherr SCRFilter system is employed, containing both a diesel oxidation catalyst (DOC) and a SCR-coated particulate filter. The Liebherr SCRonly system for Tier 4f only contains an SCR catalytic converter, making it practically maintenance-free. For markets with emission standards corresponding to Stage IIIA, the engine is fitted with exhaust-gas recycling. For all variants, flexibility is shown in taking into account the customer-specific installation situation.

Like all engines of the latest generation, the D964 is distinguished by a high level of system integration: both the ECU3 engine control and the 11.2 common rail system are Liebherr-own developments.

November 17, 2017

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Tom Stone is Editor of the iVT brand – which includes digital and print editions of a quarterly magazine, Off-Highway Annual, and the Advanced Lift-truck supplement, as well as ivtinternational.com, which is updated daily. Tom has met and interviewed some of the world's leading industrial vehicle OEM presidents, CEOs and MDs, and takes great pride in cementing iVT's place as the leading forum for debate within the industry, a reputation that his been built up over the brand's 25-year history.

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