Kia to launch 48V mild hybrid diesel
Kia is set to introduce its first 48-volt diesel mild hybrid powertrain in the second half of 2018.
The ‘EcoDynamics+’ powertrain is the first new technology to be launched as part of Kia’s wider powertrain electrification strategy. It also means Kia is the first manufacturer to offer consumers hybrid, plug-in hybrid, battery-electric and 48-volt technology across its model line-up.
Kia’s take on mild-hybrid features a compact 0.46kWh 48-volt lithium-ion battery and a new Mild-Hybrid Starter-Generator (MHSG). By electronically controlling the MHSG using the inverter, the system switches between two modes: ‘motor’ and ‘generator’.
Connected by a belt to the diesel engine’s crankshaft, under acceleration the MHSG provides up to 10kW of electric power assistance to the powertrain in ‘motor’ mode, reducing engine load and emissions. In ‘generator’ mode, the system harvests kinetic energy from the vehicle during in-gear deceleration and braking and uses the power to recharge the batteries.
That all translates to greater efficiency, additional torque for hard acceleration and reduced engine load during light acceleration.
The battery power can also restart the engine in any situation, assuming there’s enough charge. During in-gear deceleration and braking, the engine will shut down and the hybrid system will kick things back into life if the throttle pedal is pressed.
Finally, the powertrain is compatible with both manual and automatic transmissions, and could be adapted for front-, rear- and all-wheel drivetrain layouts. The powertrain will also be adapted for use in petrol engines.
The new EcoDynamics+ engine will feature in the Kia Sportage when it debuts, then later in the third-generation Ceed in 2019.