Why Can't We Significantly Boost ICE Auto Efficiency?

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SUMMARY

The discussion centers on improving the efficiency of Internal Combustion Engine (ICE) vehicles, specifically through two main strategies: heat recovery utilizing a bottoming cycle to harness energy from radiator heat loss, and regenerative braking to convert braking energy into electricity. These methods are particularly relevant for hybrid vehicles, where electric power plays a significant role. Participants noted that these techniques are already being implemented by various companies, highlighting ongoing advancements in automotive efficiency.

PREREQUISITES
  • Understanding of Internal Combustion Engine (ICE) mechanics
  • Knowledge of hybrid vehicle technology
  • Familiarity with regenerative braking systems
  • Basic principles of thermodynamics related to heat recovery
NEXT STEPS
  • Research heat recovery systems in automotive applications
  • Explore regenerative braking technologies and their implementations
  • Investigate bottoming cycle systems for energy efficiency
  • Examine case studies of hybrid vehicles utilizing these technologies
USEFUL FOR

Automotive engineers, hybrid vehicle developers, and anyone interested in enhancing the efficiency of Internal Combustion Engine vehicles through innovative technologies.

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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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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