Why does the throttle body utilize a coolant circuit?
#1
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Curious, why does the throttle body include an internal circuit for engine coolant?
If you look at the TB, you'll see a coolant input and output line, and I can only assume circulating coolant through the TB is either to keep the TB cool in warm weather, or warm in cold weather.... or both, and just keep the TB temp consistent in all weather?
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If you look at the TB, you'll see a coolant input and output line, and I can only assume circulating coolant through the TB is either to keep the TB cool in warm weather, or warm in cold weather.... or both, and just keep the TB temp consistent in all weather?
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#2
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My guess is it keeps the throttle body temperature down. Since it's made of aluminum and because it is closely located to the engine,I'm sure it gets hot and by reducing the temperature of the throttle body,it also keeps the inlet air temperature cooler and more steady. Cooler,denser air helps produce more power.
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al_roethlisberger (03-09-2017)
#3
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al_roethlisberger (03-09-2017)
#4
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It's to prevent icing. I had that in an E Type, it was raining and about +1C. Sitting at a light the car started idling slower and slower until I blipped the throttle and then it was fine again. Took noticeably more effort than usual to break the ice and move the throttle.
These days it's also about emissions, as the air cools quite a bit across a throttle plate at small openings and a heated throttle body heats the air so it can vapourize the fuel better.
These days it's also about emissions, as the air cools quite a bit across a throttle plate at small openings and a heated throttle body heats the air so it can vapourize the fuel better.
#5
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I measured the temperature of various parts of my V12 after a long drive and the intake runners were 40-50C cooler than water (and block) temperature.
#6
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It's a great low tech system. It gives warm air for better mixing and economy at idle and low speed, and cooler air at higher speed for more power, yet there is greater turbulence in the cylinder to still give good mixing.
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Doug (03-10-2017)