What Are Mild Hybrid Emissions Vehicles (MHEVs)?

You must have come across the terms hybrid emission vehicles (MHEVs) and electric vehicles (EVs). But what is a mild hybrid vehicle? 

Well, mild hybrid vehicles are a recent addition to the list of low-emission vehicles. It's different from full hybrids (HEV) and plug-in hybrids (PHEV). Although the basic functionality of mild hybrids is similar to that of hybrid vehicles, there are certain differences in the output. 

Mild hybrids are good at improving your vehicle's fuel economy. And since MHEVs are gaining popularity, many auto brands such as Volvo, Nissan, Ford, RAM, Kia, GM, Jeep, Audi, and others are making these models.

If you have ever wondered about the workings of MHEVs, this blog will provide valuable insights into how MHEVs work, their advantages, and disadvantages.

 

What is a Mild Hybrid Emissions Vehicle?

 

A mild hybrid car is a type of hybrid vehicle that combines a regular engine with electric components. 

It works differently from other hybrids because it has a small electric generator instead of a normal starter motor or alternator and a small lithium-ion battery. 

Mild hybrid cars offer enhancements to standard petrol or diesel vehicles, resulting in various improvements, such as reduced emissions and improved fuel efficiency.

 

How Does an MHEV Work?

 

The primary objective of mild hybrids is to reduce emissions in petrol or diesel vehicles rather than achieve complete eco-friendliness.

Mild hybrids combine gasoline/diesel components with electric parts. They have a small electric generator instead of a conventional starter motor or alternator, as well as a small lithium-ion battery. 

Mild hybrids usually use a 48-volt electrical system that shares the workload with the engine, making the drive more efficient and reducing CO2 emissions. 

Although MHEVs provide electric assistance to the engine, they cannot power the vehicle solely with sustainable energy. Nonetheless, this assistance makes a noticeable difference in performance.

Compared to conventional combustion engine vehicles, mild hybrids are approximately 15% more efficient, which translates to significant fuel savings. Driving a mild hybrid not only benefits your wallet but also contributes to a greener planet, although the degree of impact remains a topic of debate.

 

Are Mild Hybrids Environmentally Friendly?

 

Not quite. Mild hybrids merely enhance the driving experience of petrol or diesel vehicles; they cannot match the emissions reduction achieved by battery electric or plug-in hybrid vehicles.

While shutting off the engine at idle moments does reduce emissions to some extent, mild hybrids still rely on fuel for power.

 

Benefits of mild hybrid emission vehicles

 

• Improved performance: The inclusion of electric components enhances acceleration, allowing for quicker starts and smoother driving experiences. You can easily turn off the engine at a red light without worrying about a sluggish restart or stalling. The overall performance of the vehicle, whether stationary or in motion, is noticeably improved.

• Fuel economy: One of the significant advantages of mild hybrids is their efficient management of fuel economy. By leveraging electric assistance, these vehicles consume less fuel compared to conventional gasoline or diesel cars. This translates to potential savings on your fuel expenses over time.

• Affordable: Fully electric vehicles tend to be more expensive than mild hybrids, making the latter a more affordable choice (depending on the specific vehicle or brand).

• Smooth transition from traditional to a hybrid car: Another aspect that appeals to many drivers is that mild hybrid vehicles feel similar to standard combustion-engine vehicles. They typically retain the manual transmission, which can make the transition from a traditional car to a hybrid smoother for those who are accustomed to manual driving.

 

Disadvantages of MHEVs 

 

• Carbon emissions: Despite emitting fewer emissions than conventional vehicles, mild hybrids still contribute to carbon emissions through their tailpipe. This can be a concern for individuals seeking a greener and more sustainable driving option.

• Long-term feasibility: It's also essential to evaluate whether you'll be satisfied with a mild hybrid in the long run. As countries implement stricter regulations and focus on reducing emissions, hybrids may face limitations or even be phased out in favor of fully electric or hydrogen-powered vehicles. This may impact the resale value and future usability of mild hybrids.

Ultimately, choosing a mild hybrid emission vehicle depends on your priorities. If you prioritize immediate cost savings, smoother acceleration, and a more environmentally friendly option compared to traditional vehicles, a mild hybrid can be a suitable choice. However, if you're aiming for zero emissions and long-term sustainability, fully electric or hydrogen-powered vehicles may be more aligned with your goals.