Back to results
US 10,989,126 B2Granted
Methods and system for operating an oxygen sensor
AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Hao Zhang, Christopher Paul Glugla, Jacobus Hendrik Visser, Richard E. Soltis
Life of this patent
Estimating the term…
Abstract
Systems and methods for operating an internal combustion engine that includes an oxygen sensor are described. In one example, a voltage that is applied to a heating element of an oxygen sensor is integrated to determine a resistance of the heating element. The resistance of the heating element is the basis for adjusting voltage applied to the heating element during subsequent engine starts.
Claims20
A system, comprising:
- an engine;
- an oxygen sensor;
- an alternator;
- and
- a controller including executable instructions stored in non-transitory memory to apply a first field current to the alternator during a first cold start of the engine to generate a first voltage, apply a second field current to the alternator during a second cold start of the engine to generate a second voltage, the second voltage greater than the first voltage, the first voltage based on a low oxygen sensor heater resistance, the second voltage based on an estimated oxygen sensor heater resistance.
2 more elements
An oxygen sensor operating method, comprising:
- supplying a voltage to an oxygen sensor heater during a cold engine start via a controller;
- integrating the voltage;
- and
- adjusting the voltage applied to the oxygen sensor heater applied during a subsequent cold engine start via the controller responsive to integrating the voltage.
1 more element
An oxygen sensor operating method, comprising:
- supplying a voltage to an oxygen sensor heater during a cold engine start via a controller;
- integrating the voltage beginning at a time when the voltage is applied to the oxygen sensor heater and ending at a time when a pumping current of an oxygen sensor is detected;
- and
- adjusting the voltage applied to the oxygen sensor heater applied during a subsequent cold engine start via the controller responsive to integrating the voltage.
1 more element
Dependencies are inferred from the claim text.