CALIBRATION TOOL
First Claim
1. A calibration tool for a vehicle monitoring device, the tool comprising a processor having a clock or access to a time signal and arranged for connection to and to receive and process signals representing engine and/or vehicle operating parameters, the processor having or connected to means for storing ‘
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data (as herein defined) relating to the vehicle and its engine and codes identifying the available OBD outputs and inputs, the processor being programmed to calculate certain vehicle-specific coefficients over the vehicle'"'"'s operating range and to populate an array with the said coefficients so that the processor or the vehicle monitoring device can look up the corresponding coefficient from the array to calculate the desired value or output using the available inputs or signals.
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Accused Products
Abstract
The invention provides a calibration tool for a vehicle monitoring device, the tool having a processor with a clock or access to a time signal and arranged for connection to and to receive and process signals from a vehicle on-board diagnostics unit (OBD), the processor having or connected to means for storing data relating to the vehicle and its engine and codes relating to signals from the available OBD outputs and inputs, the processor being programmed to calculate and store certain coefficients derived over the vehicle'"'"'s operating range and to populate an array with the said coefficients so that the processor can look up the corresponding co-efficient from the array to calculate the desired value or output. The invention extends to a method of calibrating a calibration tool or a vehicle-monitoring device mounted in a vehicle provided with such a calibration tool. The method comprises the steps of configuring the calibration tool to receive data from vehicle sensors including those indicating vehicle road and engine speed data and temperature data, operating the vehicle, processing the data received during operation of the vehicle to calculate coefficients specific to the vehicle, and populating look-up tables that are accessible to the vehicle monitoring device with the calculated coefficients.
27 Citations
48 Claims
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1. A calibration tool for a vehicle monitoring device, the tool comprising a processor having a clock or access to a time signal and arranged for connection to and to receive and process signals representing engine and/or vehicle operating parameters, the processor having or connected to means for storing ‘
- hard’
data (as herein defined) relating to the vehicle and its engine and codes identifying the available OBD outputs and inputs, the processor being programmed to calculate certain vehicle-specific coefficients over the vehicle'"'"'s operating range and to populate an array with the said coefficients so that the processor or the vehicle monitoring device can look up the corresponding coefficient from the array to calculate the desired value or output using the available inputs or signals.
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2-33. -33. (canceled)
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34. A method for calibrating an on-board monitoring device for a motor vehicle, comprising the steps of:
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providing an on-board calibration tool comprising; a processor having a clock or access to a time signal, and constructed and arranged for receiving and processing signals representing at least one of engine, power-train and vehicle operating parameters from a vehicle OBD port or vehicle sensors, means for storing hard data relating to the vehicle and its engine and codes identifying the available OBD port outputs and inputs, and processor programming for calculating vehicle-specific coefficients over an operating range for the vehicle and to populate an array with the coefficients, so that the processor or the vehicle monitoring device can look up a corresponding co-efficient from the array when certain values are not available or are delayed so that a desired value or output can be obtained using available inputs or signals, inputting or making available vehicle-specific data to the calibration tool, connecting the calibration tool to at least one of a vehicle on-board diagnostics (OBD) port and vehicle sensors, accessing static engine or power-train data, extracting dynamic engine outputs from the OBD port or sensors, operating the vehicle, performing calculations in the calibration tool to produce coefficients representing instantaneous operating parameters corresponding to the engine outputs, and passing to and storing the coefficients in the array or look-up tables. - View Dependent Claims (35, 36, 37, 38)
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39. A calibration tool for calibrating an on-board vehicle monitoring device, comprising:
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a processor having a clock or access to a time signal, and constructed and arranged for receiving and processing signals representing at least one of engine, power-train and vehicle operating parameters from a vehicle OBD port or vehicle sensors, means for storing hard data relating to the vehicle and its engine and codes identifying the available OBD port outputs and inputs, and processor programming for calculating vehicle-specific coefficients over an operating range for the vehicle and to populate an array with the coefficients, so that the processor or the vehicle monitoring device can look up a corresponding co-efficient from the array when certain values are not available or are delayed so that a desired value or output can be obtained using available inputs or signals. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification