dieselsähköisiä

Dieselsähköisiä refers to a propulsion system used primarily in locomotives and some ships. It combines a diesel engine with an electric generator and electric motors. The diesel engine acts as the primary power source, driving the generator. This generator then produces electricity, which powers the electric motors. These motors are what actually turn the wheels or propellers, providing the motive force.

This system offers several advantages. It allows for more efficient use of the diesel engine's power by operating it at its optimal speed, independent of the vehicle's speed. The electric transmission also simplifies the mechanical design, reducing the need for complex gearboxes. Furthermore, dieselsähköisiä systems provide excellent torque at low speeds, which is crucial for starting heavy loads. The electricity generated can also be used to power onboard systems.

The primary drawback is the inherent inefficiency of converting mechanical energy to electrical energy and back to mechanical energy, compared to a direct mechanical drive. However, for applications requiring high power and flexibility, such as heavy freight hauling by locomotives, the benefits of dieselsähköisiä propulsion have made it a dominant technology. It is also found in some marine vessels where similar operational demands exist.