Active Wide-band Air Fuel Ratio Indicator
First Claim
1. An apparatus for protecting an engine of a vehicle, the apparatus comprising:
- one or more processors;
one or more memory units coupled to the one or more processors; and
a visual indicator coupled to the one or more processors;
the apparatus being configured to;
read a throttle position voltage, an engine RPM voltage, and a voltage from an air fuel ratio (AFR) system comprising a wide-band oxygen sensor;
convert the voltage from the AFR system to an AFR value;
determine whether the throttle position voltage exceeds a preset threshold throttle position voltage;
in response to determining that the throttle position voltage exceeds the preset threshold throttle position voltage, determine whether the AFR value exceeds a preset safe lower AFR limit or a preset safe upper AFR limit and whether the engine RPM voltage exceeds a preset threshold RPM voltage;
in response to determining that the AFR value exceeds the preset safe lower AFR limit or the preset safe upper AFR limit and the engine RPM voltage exceeds the preset threshold RPM voltage, turn on the visual indicator.
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Accused Products
Abstract
Methods and systems for protecting an engine of a vehicle are disclosed, including reading a throttle position voltage, an engine RPM voltage, and a voltage from an air fuel ratio (AFR) system comprising a wide-band oxygen sensor; converting the voltage from the AFR system to an AFR value; determining whether the throttle position voltage exceeds a preset threshold throttle position voltage; in response to determining that the throttle position voltage exceeds the preset threshold throttle position voltage, determining whether the AFR value exceeds a preset safe lower AFR limit or a preset safe upper AFR limit and whether the engine RPM voltage exceeds a preset threshold RPM voltage; in response to determining that the AFR value exceeds the preset safe lower AFR limit or the preset safe upper AFR limit and the engine RPM voltage exceeds the preset threshold RPM voltage, turning on a visual indicator, turning on an audible indicator, and/or triggering an active component. Other embodiments are described and claimed.
12 Citations
20 Claims
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1. An apparatus for protecting an engine of a vehicle, the apparatus comprising:
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one or more processors; one or more memory units coupled to the one or more processors; and a visual indicator coupled to the one or more processors; the apparatus being configured to; read a throttle position voltage, an engine RPM voltage, and a voltage from an air fuel ratio (AFR) system comprising a wide-band oxygen sensor; convert the voltage from the AFR system to an AFR value; determine whether the throttle position voltage exceeds a preset threshold throttle position voltage; in response to determining that the throttle position voltage exceeds the preset threshold throttle position voltage, determine whether the AFR value exceeds a preset safe lower AFR limit or a preset safe upper AFR limit and whether the engine RPM voltage exceeds a preset threshold RPM voltage; in response to determining that the AFR value exceeds the preset safe lower AFR limit or the preset safe upper AFR limit and the engine RPM voltage exceeds the preset threshold RPM voltage, turn on the visual indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for protecting an engine of a vehicle, the method comprising:
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reading a throttle position voltage, an engine RPM voltage, and a voltage from an air fuel ratio (AFR) system comprising a wide-band oxygen sensor; converting the voltage from the AFR system to an AFR value; determining whether the throttle position voltage exceeds a preset threshold throttle position voltage; in response to determining that the throttle position voltage exceeds the preset threshold throttle position voltage, determining whether the AFR value exceeds a preset safe lower AFR limit or a preset safe upper AFR limit and whether the engine RPM voltage exceeds a preset threshold RPM voltage; in response to determining that the AFR value exceeds the preset safe lower AFR limit or the preset safe upper AFR limit and the engine RPM voltage exceeds the preset threshold RPM voltage, turning on a visual indicator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification