Here's how a diesel-electric hybrid achieves better fuel economy:
Regenerative braking:
During braking or deceleration, the electric motor switches to "generator" mode and converts the vehicle's kinetic energy into electrical energy, storing it in the battery. This process saves energy that would otherwise be lost as heat in conventional brakes.
Electric-only mode:
In urban driving conditions or at lower speeds, the diesel engine can be switched off entirely, and the electric motor can propel the vehicle using stored battery power. This significantly reduces fuel consumption.
Engine downsizing:
Diesel-electric hybrids allow automakers to use smaller, more efficient diesel engines. Because the electric motor assists in propulsion, a smaller diesel engine can handle the load, resulting in improved fuel economy.
Optimized drivetrain:
The combination of the diesel engine and the electric motor enables the vehicle's drivetrain to operate at its optimal efficiency points, reducing fuel consumption.
Additionally, diesel-electric hybrids often utilize start-stop technology, which shuts off the engine when the vehicle is idling, further enhancing fuel economy.
While diesel-electric hybrids can achieve better fuel economy compared to conventional diesel vehicles, their cost and complexity may be higher, and the availability of diesel fuel stations can be a limiting factor in certain areas.
