Sensor output precision enhancement in an automotive control system
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Sep 27, 1999
filing date -
Sep 27, 1999
priority date (Note) -
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Abstract
The analog input of a sensor is connected to a 10-bit analog-to-digital converter. The converted is powered using a 5V supply. The A/D is interfaced with a microprocessor; however, only the least significant eight bits of the A/D output are connected to the microprocessor input. The microprocessor is used to adjust the fuel-air mixture used in engine combustion based on the output of the sensor. The use of the 10-bit A/D interfaced with only eight bits allows increased precision and increased computational speed. The increased precision allows more accurate adjustment of the fuel-air mixture to enable the engine to run closer to its stoichiometric point.
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