Stay informed and learn about all recent news regarding the development of the new D98 diesel engine series by Liebherr.
06/2018 - D9812 introduction to the Russian market
Presented to the Russian public for the first time, Liebherr's diesel engine D9812 is showcased at the International Trade Fair for Coal Mining Technology, Ugol Rossii & Mining, which takes place from June 5 to 8 2018 in Novokuznetsk.Press release
10/2017 - D9812 introduction to the Australian market
From October 31 to November 2, 2017, Liebherr presents its innovative products, technologies and solutions for the mining industry at the International Mining and Resources Conference (IMARC) in Melbourne, Australia. In this context, the new D9812 diesel engine is introduced to the Australian market.Press release
10/2017 - G-Drive version for Kohler generators
Diesel Magazine dedicates a complete article within its current issue to the genset version of the D9812. This G-Drive variant has been developed in the course of the cooperation with Kohler and exclusively powers their industrial generators.Read online article
06/2017 - The D9812 sets new benchmarks
In an interview with Diesel Magazine, D.Plohberger, I.Wintruff and J.Krug explain, why the D9812 engine will set the benchmark in the market in terms of efficiency and power density. They further talk about the cooperation with Kohler regarding G-Drive applications.Read online article
03/2017 - Avoiding crankshaft axial vibrations
In developing the new D98 engines, Liebherr is investigating the effects of various forms of crankshaft loading in order to attenuate limitation on engine performance imposed by this vital component. Dr. Béchir Mokdad from Colmar and Dr. Christoph Henninger from Bulle have published an article regarding this subject in the March 2017 Special Edition of MTZ industrial.Article in MTZ industrial magazine
23/02/2017 - D9812 rewarded with Diesel of the Year award
The Editorial Committee of Diesel magazine has nominated Liebherr's D9812 engine as Diesel of the Year 2017. The award ceremony honoring the most innovative engine of the year took place on February 23 within the framework of the 30th Samoter exhibition in Verona (Italy).Press release
18/10/2016 - Kohler and Liebherr collaboration announced
At an official presentation, Kohler and Liebherr announced their collaboration. In close cooperation, specialists of the two organisations developed two highly efficient and reliable G-Drive diesel engines based on a modular design.Press release
09/2016 - Presentation of D9812 at Minexpo in Las Vegas
At Minexpo 2016 in Las Vegas, the V12 variant of the D98 series has been presented to the American market in a special mining configuration. Check out all the information about the new highly productive and efficient D9812 in the official press release.Press release
09/2016 - The D9812: A mining engine
In an exclusive interview with Diesel Progress North America (09/2016), engine experts from Liebherr give an insight into the brand new D9812. Have a look at the interview and discover how the D98 series fulfills the requirements and needs of the mining industry.Read the whole interview (PDF, 914 KB)
11/04/2016 - First presentation of D9812 at Bauma Munich
At Bauma 2016 in Munich, Liebherr unveiled the new D98 large diesel engine series. A protoye of the V12 - the first cylinder variant to appear - was presented to the public for the first time. The engine aroused vivid interest and attracted plenty of vistiors.Press release
The design of the D98 engine series includes in-house key components like engine control units (ECU) and Common Rail injection systems. Each component is precisely designed or selected for ideal matching to ensure the most efficient engine.
With more than 99.9% of oil separation, this closed ventilation system reaches a very high quality of filtration. Moreover, with no rotating or electric-driven components being used, the system is very reliable and enables extended maintenance intervals.
Common Rail System
The high-pressure fuel pump and the injectors of the Common Rail System are Liebherr in-house developments. The system reaches an injection pressure up to 2,200 bar and is perfectly adapted to all other engine components. Together, the components lead to optimised performance and best-in-class fuel efficiency.
A newly developed turbocharging system is implemented in the Liebherr diesel engines. It provides the optimal quantity of air to reach maximum power and reduce fuel consumption.
Engine Control Unit
All functions of the engine are controlled by the Liebherr engine control unit (ECU) granting a perfect match of hardware and software. The ECU includes diagnostic software and supports extended engine lifetime.
Integrated Front End
This strategical part integrates and supports different engine components like the air compressor, the charge air cooler and the water pumps. It enables a compact and light design solution for the engine.
The D98 series is built on an intelligent modular system, ensuring high degree of responsiveness for the whole engine range. Depending on customers' expectations and application requirements, engines consist of scaled components to provide the machine with the optimized design and power at the right time.
The D98 series at a glance
Among others benefits, engines of the D98 series are able to comply with most stringent emission standards. The subsequent table enlists the most important technical details common to all three engine variants.
|Number of cylinders||12 / 16 / 20|
|Bore||175 mm (6.89 in)|
|Stroke||215 mm (8.46 in)|
|Displacement per cylinder||5.17 l (315 in3)|
|Max. ignition pressure||240 bar (3,480 psi)|
|Max. injection pressure||2,200 bar (31,908 psi)|
|Rated speed||1,200 - 1,900 rpm|
|Emission level||Fuel consumption optimised,
EPA Tier 2, EPA Tier 4 final, EU Stage IV
Take a look at the different variants
Learn more about the different models of the D98 series and their specific configurations.
|Displacement||62 l||83 l||103 l|
|Power rating||1,250 - 2,700 kW||2,000 - 3,600 kW||2,700 - 4,500 kW|
|Peak torque||15,000 Nm||20,000 Nm||25,000 Nm|
|Dry weight||8,650 - 9,300 kg||11,700 - 12,400 kg||14,700 - 15,500 kg|
|Oil system capacity||170 - 240 l||240 - 300 l||320 - 390 l|
|Displacement||3,787 in3||5,049 in3||6,312 in3|
|Power rating||1,676 - 3,621 hp||2,682 - 4,828 hp||3,621 - 6,035 hp|
|Peak torque||11,063 lb-ft||14,751 lb-ft||18,439 lb-ft|
|Dry weight||19,070 - 20,503 lbs||25,794 - 27,337 lbs||32,408 - 34,172 lbs|
|Oil system capacity||180 - 254 U.S. qt||254 - 317 U.S. qt||338 - 412 U.S. qt|
The mining champion
All engines of the D98 series have been especially designed to meet the extreme and demanding mining conditions. Thanks to their robust architecture as well as exceptional dynamic behavior, they reliably power your mining equipment. In addition, the diesel engines by Liebherr are very fuel efficient and help keep the operating costs low.Diesel engines for mining applications
The D9812 downspeeding function helps to increase its reliability, reduce fuel consumption and save components. Liebherr engines are also characterised by an outstanding torque availability.
The new V12 diesel engine by Liebherr has one of the highest power densities per cylinder. Therefore, the D9812 offers an economical alternative to the 16-cylinder engines typically used in mining trucks. Its prime advantages are the reduced fuel consumption as well as lower maintenance costs.
Modular and adaptable to different kinds of applications
Thanks to their intelligent modular system and the large capacity, Liebherr diesel engines of the D98 series are also ideal partners for:
- Oil & Gas industry: The robust and reliable design as well as the power capacity of the D98 mining engine are great advantages for the oil & gas industry. Furthermore, the engines answer the needs for high load cycles and availability e.g., for well servicing applications.
- Railway industry: The extremely compact design and the high power density of the engine provides locomotives with an unrivaled efficiency. The best-in class performances and high reliability of the D98 series are a perfect match for the railway industry.