HO2S HEATER CONTROL OUTLINE [L3 R.H.D.]
BUE014000000N34
• Based on the control of the HO2S heaters, a stabilized oxygen concentration is detected even at low exhaust temperatures, and feedback control of fuel injection even at cold engine start is made possible for improved cold temperature exhaust emission performance.
• When exhaust gas temperature is high, the HO2S are protected from a rise in temperature by the stopping of energization to the HO2S heater.
• Through duty control of the HO2S according to engine operation conditions (exhaust air temperature), both emission performance improvement and protection of the HO2S have been achieved.
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1
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Single cycle
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2
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Energization time
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