Questions tagged [closed-loop]

A term used to indicate that the engine control computer is currently actively controlling the fuel mixture in the engine cylinders.

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Changing or disabling vtec switchover RPM in 7th generation Honda Accord

I am considering increasing the VTEC switch-over point in my 2007 Honda Accord. The reason I want to do this is to improve the MPG of the car. In this question I am ignoring the open loop versus ...
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0answers
114 views

Emissions per mile of high MPG lean-burn gas-powered cars versus standard gas-powered cars

I am wondering if there have been studies or calculations of the NOx emissions per mile of high MPG lean-burn gas-powered cars versus standard gas-powered cars. Honda made some great lean-burn cars ...
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2answers
3k views

Letting Off Gas Forces Open Loop

I noticed something that seems a bit strange to me. Many times when I let off the gas the ECU drops out of closed loop into open loop for about a second. You can see on the graph that this happens ...