About Sisu Diesel Inc.

Sisu Diesel Inc was founded in 1942. The company and its products were known under the Valmet brand until 1997. Over 700 persons work at Sisu Diesel factory in Nokia, Finland. SisuDiesel engines are manufactured also in Brazil primarily for South American markets.

Over 60 years of engine construction has resulted as high technology, which can be seen both in products and in production. Throughout its history Sisu Diesel has developed many innovative technical solutions which have not been introduced by competitors until the 21st century. For example direct injection technology, cross-flow cylinder head, centrally supported cylinder liners and advanced turbocharger technology have been everyday features in SisuDiesel engines already for decade.

The Technology

Uncompromising professional skills — The assembly of basic engines as well as the painting of complete engines is handled entirely by robots. Final installations and inspections are made by skilled professionals. Quality and environment systems are certified according to the ISO 9001 and ISO 14001 standards.

Engines for demanding marine use — The basic construction of the SisuDiesel engines has been designed for extreme conditions from blistering equatorial heat to the harsh winters in Northern Europe. A growing number of manufacturers are choosing reliable SisuDiesel engines to power their advanced machinery and equipment.

Strong and reliable marine engines in power range 130 – 410 hp — Citius series 4 and 6 cylinder marine engines have been constructed for use where reliability, low operating costs and easy servicing are the most important features.

Four valve cylinder head — Citius series marine engines feature a four valve cylinder head which improves gas exchange and fuel mixture efficiency, resulting in reduced emissions and improved fuel economy.

Centrally supported cylinder liners — When cylinder liner vibration is reduced, cooling becomes more effective and wear is minimized, resulting in longer engine life.

Common Rail injection system — SisuDiesel marine engines use a Common Rail injection system allowing considerably higher injection pressure and optimized injection timing for improved efficiency.

Electronic control enables injection even at five different stages during the combustion process. The control system analyses and adjusts the fuel quantity to the engine over a hundred times per second.

Third generation engine control electronics EEM3 — The third generation electronic control system developed for Common Rail engines offers versatile features for the user. The entire injection process is controlled and adjusted to optimal conditions to improve efficiency and emissions.

Cold start and cold running adjustments are controlled automatically depending on ambient and engine temperatures. Electronic engine protection functions are built into the control system.

More enjoyable sound — Combustion pressure rises slowly thanks to pre-injection which reduces the sharp diesel sound. The timing gear profile also reduces mechanical noise.

Easy servicing — The motor has a clean-cut construction and service points are easily accessible. Spare parts are standardized between engine types which simplifies maintenance and servicing.