Vacuum detection component
First Claim
1. A method of leak detection in a closed vapor handling system of an automotive vehicle comprising:
- providing a vacuum detection component having a microcontroller operatively coupled to actuators and sensors;
receiving at least one sensor signal from the sensors by the vacuum detection component;
processing the at least one sensor signal in the microcontroller;
sending output to an engine management system based on the at least one processed sensor signal;
processing the output in the engine management system operatively coupled to a control valve;
transmitting input from the engine management system to the microcontroller based on the processed output; and
sending actuator signals from the microcontroller to the actuators.
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Accused Products
Abstract
A method of leak detection in a closed vapor handling system of an automotive vehicle, implemented by a system, the method including providing a vacuum detection component having a microcontroller operatively coupled to actuators and sensors, receiving at least one sensor signal from the sensors to the vacuum detection component, processing the at least one sensor signal in the microcontroller, sending output to an engine management system based on the at least one processed sensor signal, processing the output in the engine management system operatively coupled to a control valve, transmitting input from the engine management system to the vacuum detection component based on the processed output, and sending actuator signals from the microcontroller to the actuators. The system including a vacuum detection component having a microcontroller operatively coupled to actuators and sensors, the microcontroller sending and receiving, respectively, signals therefrom and a processor communicating with the microcontroller, the microcontroller processing the signals and sending output based on the processed signals to the processor, the processor processing the output and transmitting input to the microcontroller based on the processed output.
12 Citations
39 Claims
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1. A method of leak detection in a closed vapor handling system of an automotive vehicle comprising:
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providing a vacuum detection component having a microcontroller operatively coupled to actuators and sensors;
receiving at least one sensor signal from the sensors by the vacuum detection component;
processing the at least one sensor signal in the microcontroller;
sending output to an engine management system based on the at least one processed sensor signal;
processing the output in the engine management system operatively coupled to a control valve;
transmitting input from the engine management system to the microcontroller based on the processed output; and
sending actuator signals from the microcontroller to the actuators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of leak detection in a closed vapor handling system of an automotive vehicle comprising:
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providing a vacuum detection component having a microcontroller operatively coupled to a pressure switch, a temperature sensor, and a shut off valve, the vacuum detection component communicating with a power source and providing a communication interface;
receiving a pressure signal and a temperature signal from the pressure switch and temperature sensor, respectively, by the microcontroller;
processing the pressure signal and the temperature signal in the microcontroller;
determining a diagnostic result in the microcontroller based on the signals, the diagnostic result including whether a leak condition exits, whether a tank cap is missing and whether a component diagnoses passes;
sending the diagnostic result to an engine management system;
processing the diagnostic result in the engine management system, the engine management system operatively coupled to a control valve, the engine management system providing a communication interface and detecting an onboard diagnostic error;
transmitting a diagnosis request, a reset diagnosis, purge status, and engine status from the engine management system to the microcontroller; and
sending an operation request from the engine management system to the shut off valve.
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21. An automotive evaporative leak detection system comprising:
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a vacuum detection component having a microcontroller operatively coupled to actuators and sensors, the microcontroller sending and receiving, respectively, signals therefrom; and
a processor communicating with the microcontroller, the microcontroller processing the signals and sending output based on the processed signals to the processor, the processor processing the output and transmitting input to the microcontroller based on the processed output. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An automotive evaporative leak detection system comprising:
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a vacuum detection component having a microcontroller operatively coupled to a pressure switch, a temperature sensor, and a shut off valve, the microcontroller sending and receiving, respectively, signals therefrom, the vacuum detection unit located on a conduit between an atmosphere and a canister, the canister communicating with an engine and an atmosphere, the engine communicating with a fuel tank;
a control valve located between the canister and the engine; and
a processor communicating with the microcontroller, the processor operatively coupled to the control valve, wherein the microcontroller processes the signals, determines a diagnostic result based on the signals, provides a communication interface, and sends the diagnostic result to the processor, the processor provides a communication interface, detects an onboard diagnostic error, requests a diagnosis, deletes a diagnosis result, determines whether the engine is off, requests operation of the shut off valve, and provides purge status.
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Specification