Wärtsilä 46TS-DF

Wärtsilä 46TS-DF dual fuel marine engine

Wärtsilä 46TS-DF delivers unprecedented levels of efficiency and power density across a wide operational range for vessels in every segment.

Get the facts: open the brochure

The flexible Wärtsilä 46TS-DF dual fuel marine engine

Wärtsilä 46TS-DF dual fuel marine engine is fuel flexible and will help you power a more sustainable future. It represents a new generation of medium-speed engines and sets a new benchmark for fuel efficiency and emissions performance.

The Wärtsilä 46TS-DF is suitable for a broad range of vessel types and applications. For example:

as a main propulsion engine in diesel-electric, mechanical and hybrid installations.

This engine can be optimised to run

at constant speed, or
along a propeller curve.

Who is Wärtsilä 46TS-DF engine for?

Because Wärtsilä 46TS-DF can bring fuel savings and maximise environmental performance, it is an optimal choice for

cruise lines
ferry operators.

Merchant vessels can use Wärtsilä 46TS-DF as a main engine on board, for example on:

medium to large size gas tankers
bulk carriers
container ships
special vessels such as dredgers.

Wärtsilä 46TS-DF – powerfully ready for future fuels

With its two-stage turbocharging, Wärtsilä 46TS-DF delivers unprecedented levels of efficiency and power density across a wide operational range. It is available in six- to 16-cylinder configurations, corresponding to a power output range of 7.8 to 20.8MW at 600rpm.

Wärtsilä’s proven dual-fuel technology combined with an intrinsically modular design means that the engine can operate on either gas or liquid fuel. It is possible to switch between the two fuels according to cost, availability and local environmental regulations.

For the vessel owners and operators, this flexibility and modularity mean that they can

save fuel
cut emissions
choose potential upgrades in the future, including upgrades for use of alternative fuels.

Key features

High power density (1,300 kW / cylinder)
Two-stage charge air system for higher efficiency
Digital common rail fuel injection system for smoke-free operations
Variable valve timing for improved flexibility
Thermal insulation to improve safety and minimise loss of radiated heat
Fully electrical control devices for accurate and fast control

Key benefits of the Wärtsilä 46TS-DF

Efficient and powerful, with high power density (1,300 kW / cylinder)
Reliable, with proven and flexible dual-fuel technology
Complies to regulations. IMO Tier III compliant in gas and diesel modes when combined with SCR
Cuts emissions thanks to the revolutionary NextDF technology
Cuts your operational costs because it is efficient and has improved heat recovery
Saves on maintenance costs because there are 10% fewer cylinders

Open the Wärtsilä 46DF-TS brochure

Comes with NextDF technology

NextDF offers an innovative solution to reduce engine emissions and comply with increasingly strict legislation. With the NextDF feature included, Wärtsilä 46TS-DF will see a significant reduction of methane emissions.

The power of NextDF is based on the following:

Advanced combustion control continuously adjusts engine settings. This optimises combustion for fuel quality and air conditions, which minimises methane slip
Latest valve timing control and injector technologies enhance efficiency
New air-fuel ratio control logic lowers the peak temperature of combustion, which reduces NOx formation – and reduces methane slip even further.

Cutting methane slip brings brilliant benefits to the owner and operator, including saving money by avoiding or minimizing emissions-related penalties, and reducing environmental impact.

Take a closer look at Wärtsilä 46TS-DF

Wärtsilä 46TS-DF is a large-bore engine which takes power density and performance to new heights. Learn more from this short video:

High performance with optimal total cost of ownership

When you want to get the best performance while minimising operating costs, you will want to maintain the vessel’s engines in peak condition. Wärtsilä is here to help you: choose a service agreement and you can be sure to have our specialist support for planning, preparing, and executing maintenance.

Your spare parts will be managed by our team, and a proficient maintenance workforce will be ready to support you with high-quality service. AI-driven solutions and predictive analyses combined with expert knowledge will keep your vessel operating at its best.

A service agreement with Wärtsilä offers genuine peace of mind and lets you concentrate on your primary operations. Learn more about our service agreements.

Wärtsilä 46TS-DF Product guide, 3D models and drawings

Download Product guide

Access 3D models & drawings

What’s the secret to successful collaboration when introducing a new engine?

Royal Caribbean Group

When Royal Caribbean Group became the first customer for the new Wärtsilä 46TS-DF engine, they knew the rewards it could bring. But what was needed to make sure that the engine’s full potential could be realised?
Open the case study