What is a Mild Hybrid Vehicle?
A mild hybrid vehicle, also known as a lite-hybrid, is a type of hybrid electric vehicle that uses both an electric motor and gasoline engine. However, unlike a full hybrid or plug-in hybrid, a mild hybrid has a smaller battery and no ability to solely operate on electric power alone.
How Does it Work?
Mild Hybrid Vehicle a belt-driven integrated starter generator (ISG) and a small battery, typically around 10-20 kilowatt-hours, to complement the function of the internal combustion engine. The ISG can provide a boost to acceleration by adding torque to the engine or capture energy through regenerative braking to charge the battery. Some key technologies used include:
ISG Provides Boost and Recharging
The ISG is connected between the engine and transmission and helps launch the vehicle from a stop by providing an electric boost to the engine. This reduces the load on the gasoline engine and improves fuel efficiency at lower speeds. During braking or coasting, the ISG can function as a generator to recapture kinetic energy and recharge the battery through regenerative braking.
Stop-Start System Saves Fuel
When the vehicle comes to a complete stop, the engine automatically shuts off to conserve fuel. As soon as the brake is released or the gas pedal pressed, the ISG instantly restarts the engine. This eliminates unnecessary idling of the engine at stops like traffic lights and reduces emissions.
Battery Provides Power Assist
The battery, while small, provides additional electric power assist by supplementing the torque from the engine during acceleration demands. This reduces the workload on the engine and allows it to operate more efficiently at a lower rpm.
Benefits of Mild Hybrid Technology
Mild hybrid systems are lighter, more efficient and less expensive than full hybrids, making them a smart "in-between" solution. Some key benefits include:
Improved Fuel Efficiency
By utilizing the electric motor and battery for power assist and regenerative braking, a mild hybrid can achieve up to a 10% improvement in fuel economy over a standard vehicle. This results in reduced operating costs over time.
Lower Emissions
The stop-start system and electric boosting capability allow the engine to spend less time at idle or working inefficiently. This lowers tailpipe emissions, contributing to sustainability.
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