Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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Computers and Control Systems: Description and Operation
Fig. 9 Closed loop system.:
This system is designed to minimize carbon monoxide
(CO), hydrocarbons
(HC), and oxides of nitrogen
(NOx) while providing an optimum air/fuel ratio under all operating conditions.
Various sensors transmit signals to the Electronic Control Unit
(ECU). The ECU then adjusts injector opening time according to engine operating conditions.
