Improving auto efficiency

In summary, there are two potential ways to improve the efficiency of ICE autos - heat recovery and using braking energy to generate electricity. These methods may be especially relevant for hybrid vehicles. Some companies are already implementing these ideas and there are forums discussing even more ways to increase efficiency. One individual is currently working on a hybrid vehicle that utilizes multiple energy sources, including pedals.
  • #1
PRDan4th
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Why can't we improve the efficiency (miles/gallon) of ICE autos?

It seems to me there are two areas that can be used to add efficiency:

1) Heat recovery with some form of a "bottoming cycle" to generate additional torque or electricity from heat lost in the radiator, and

2) Breaking energy - generating electricity from engaging an alternator when the brake pedal is used, or maybe when the driver takes his foot of the gas. A lot of energy is wasted in breaking.

These may be more important in hybrid vehicles where electricity is being used in a greater proportion of the fuel mix.

Has anyone here looked at this?
 
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  • #2
PRDan4th said:
Why can't we improve the efficiency (miles/gallon) of ICE autos?

It seems to me there are two areas that can be used to add efficiency:

1) Heat recovery with some form of a "bottoming cycle" to generate additional torque or electricity from heat lost in the radiator, and

2) Breaking energy - generating electricity from engaging an alternator when the brake pedal is used, or maybe when the driver takes his foot of the gas. A lot of energy is wasted in breaking.

These may be more important in hybrid vehicles where electricity is being used in a greater proportion of the fuel mix.

Has anyone here looked at this?

These are all good ideas. And they are already being implemented by various companies around the world. You might want to check the https://www.physicsforums.com/showthread.php?t=232274" for even more ideas.

I'm working on a gas, steam, electric, pneumatic, hydraulic, spring, and flywheel hybrid vehicle. With pedals as an option of course.:smile:
 
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  • #3


I agree that there are definitely ways to improve the efficiency of ICE autos. The two areas you mentioned, heat recovery and braking energy, are both valid areas of research and development in the automotive industry. In fact, many car manufacturers are already implementing these technologies in their hybrid vehicles.

However, improving the efficiency of ICE autos is not a simple task. It requires a combination of advancements in technology, materials, and design. One of the main challenges is balancing efficiency with performance and cost. For example, implementing a "bottoming cycle" to recover heat may add weight and complexity to the vehicle, which can impact its performance and cost.

Additionally, there are limitations to the efficiency of ICE engines due to the laws of thermodynamics. The maximum theoretical efficiency of an ICE engine is around 40%, and in reality, most engines are only able to achieve around 20-30% efficiency. This means that there is a limit to how much efficiency can be improved without completely redesigning the engine.

That being said, there is ongoing research and development in the automotive industry to improve the efficiency of ICE autos. This includes advancements in engine design, materials, and technologies like hybrid systems and regenerative braking. So while there may be limitations, there is still room for improvement and scientists and engineers are constantly working towards making ICE autos more efficient.
 

1. How does improving auto efficiency benefit the environment?

Improving auto efficiency reduces the amount of fuel consumed by vehicles, leading to lower emissions of greenhouse gases and pollutants. This helps to mitigate the impacts of climate change and improves air quality.

2. What are some ways to improve auto efficiency?

Some ways to improve auto efficiency include regular vehicle maintenance, such as keeping tires properly inflated and changing air filters, as well as driving habits like avoiding rapid acceleration and idling. Using alternative fuels and investing in more fuel-efficient vehicles are also effective methods.

3. How much can improving auto efficiency save on fuel costs?

The amount of fuel saved and subsequent cost savings will vary depending on the type of vehicle and driving habits. However, studies have shown that improving auto efficiency can save drivers hundreds of dollars per year on fuel costs.

4. Are there any government incentives for improving auto efficiency?

Yes, there are government incentives available for improving auto efficiency. These can include tax credits for purchasing hybrid or electric vehicles, as well as programs that provide funding for alternative fuel infrastructure and research and development for more efficient vehicle technologies.

5. How does improving auto efficiency impact the economy?

Improving auto efficiency can have positive impacts on the economy in several ways. It can reduce our dependence on imported oil, creating jobs and boosting domestic energy security. It can also lead to cost savings for consumers, freeing up funds for other purchases and potentially stimulating economic growth.

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