Vehicle engine status detection mechanism for presenting engine status to third-party automotive accessories
First Claim
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1. A circuit for detecting voltage states of on and off output from a voltage generating engine, the states relating to engine running or not running comprising:
- a first connection point connecting the circuit to a voltage output of the engine;
a voltage comparator; and
a digital output signal port for providing binary values;
characterized in that the circuit compares voltage levels ranging above and below a configured nominal voltage level and assigns the binary values to variable states, the values used as instruction to a dual mode pressure sensing device having a barometer mode and an altimeter mode coupled to the circuit.
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Abstract
A circuit for detecting voltage states output from a voltage generating engine has a first connection point connecting the circuit to a voltage output of the engine, a second connection point connecting the circuit to electrical ground and a digital output signal port for providing binary output values. The circuit detects voltage levels ranging above and below a nominal voltage level and assigns binary values to the detected states, the values used as instruction to a device coupled to the circuit.
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16 Claims
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1. A circuit for detecting voltage states of on and off output from a voltage generating engine, the states relating to engine running or not running comprising:
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a first connection point connecting the circuit to a voltage output of the engine;
a voltage comparator; and
a digital output signal port for providing binary values;
characterized in that the circuit compares voltage levels ranging above and below a configured nominal voltage level and assigns the binary values to variable states, the values used as instruction to a dual mode pressure sensing device having a barometer mode and an altimeter mode coupled to the circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for sensing atmospheric pressure and computing barometric or altimeter results for a display based on engine voltage state comparison of voltage level output from a voltage generating engine, comprising:
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a display mechanism for displaying computed results;
a pressure sensor for sensing atmospheric pressure; and
an engine status detection circuit having a first connection point connecting the circuit to a voltage output of the engine, a voltage comparator, and a digital output signal port for providing the binary output values as instruction;
characterized in that the system computes and displays results related to pressure readings in barometric mode when the engine is determined to be not running and in altimeter mode when the engine is determined to be running. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification