Method and apparatus for three dimensional calibration of an on-board diagnostics system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-011/30
G06F-007/00
F02P-005/15
출원번호
US-0166553
(2011-06-22)
등록번호
US-8155924
(2012-04-10)
발명자
/ 주소
Tracey, Timothy D.
출원인 / 주소
Toyota Motor Engineering & Manufacturing North America, Inc.
대리인 / 주소
Snell & Wilmer LLP
인용정보
피인용 횟수 :
0인용 특허 :
16
초록▼
The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surf
The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition.
대표청구항▼
1. A method for calibrating an automobile diagnostic system with a calibration unit, the method comprising: receiving, at the calibration unit, first automobile data based on an automobile operating under a first condition, the first automobile data including a first data point and a second data poi
1. A method for calibrating an automobile diagnostic system with a calibration unit, the method comprising: receiving, at the calibration unit, first automobile data based on an automobile operating under a first condition, the first automobile data including a first data point and a second data point;generating, using the calibration unit, interpolated first automobile data by performing three dimensional interpolation on the first automobile data using the first data point and the second data point;receiving, at the calibration unit, second automobile data based on an automobile operating under a second condition, the second automobile data including a third data point and a fourth data point;generating, using the calibration unit, interpolated second automobile data by performing three dimensional interpolation on the second automobile data using the third data point and the fourth data point; andgenerating, using the calibration unit, threshold automobile data using the interpolated first automobile data or the interpolated second automobile data. 2. The method of claim 1 wherein the automobile operating under the first condition is an automobile operating under a non-malfunctioning condition and the automobile operating under the second condition is an automobile operating under a malfunctioning condition. 3. The method of claim 1 wherein the first automobile data and the second automobile data correspond to crankshaft acceleration data. 4. The method of claim 1 wherein the step of generating threshold automobile data includes adding or subtracting an offset to the interpolated first automobile data or the interpolated second automobile data. 5. The method of claim 4 further comprising the step of generating an engine control unit (“ECU”) map using the threshold automobile data. 6. The method of claim 4 wherein the offset is user variable for generating desired threshold automobile data. 7. The method of claim 1 further comprising the step of displaying the threshold automobile data as a three dimensional threshold surface on a display for visual inspection. 8. The method of claim 1 wherein: the step of receiving the first automobile data includes collecting the first automobile data using a first parameter and a second parameter, the value of the first parameter being varied while the value of the second parameter being held substantially constant; andthe step of receiving the second automobile data includes collecting the second automobile data using the first parameter and the second parameter, the value of the first parameter being varied while the value of the second parameter being held substantially constant. 9. The method of claim 8 wherein: collecting the first automobile data includes using a plurality of values of the second parameter; andcollecting the second automobile data includes using a plurality of values of the second parameter. 10. The method of claim 9 wherein the first parameter corresponds to engine load and the second parameter corresponds to engine speed. 11. A system for calibrating an automobile having an engine and an engine control unit (“ECU”), the system comprising: a calibration unit configured to be connected to the engine or the ECU of the automobile, the calibration unit configured to receive first engine data based on the engine operating under a first condition, the first engine data having a first data point and a second data point,interpolate the first engine data three dimensionally using the first data point and the second data point,receive second engine data based on the engine operating under a second condition, the second engine data having a third data point and a fourth data point,interpolate the second engine data three dimensionally using the third data point and the fourth data point, andgenerate threshold engine data using the interpolation of the first engine data or the interpolation of the second engine data. 12. The system of claim 11 wherein: the first engine data and the second engine data correspond to crankshaft acceleration data, andeach of the first engine data and each of the second engine data correlate with an engine speed value and an engine load value. 13. The system of claim 11 wherein the engine operating under the first condition is an engine operating under a non-malfunctioning condition and the engine operating under the second condition is an engine operating under a malfunctioning condition. 14. The system of claim 11 wherein the generation of the threshold engine data includes the application of at least one offset to the interpolation of the first engine data or to the interpolation of the second engine data. 15. The system of claim 14 wherein the at least one offset is adjustable by a user of the calibration unit. 16. The system of claim 11 further comprising a display configured to display the interpolation of the first engine data, the interpolation of the second engine data or the threshold engine data for visual inspection. 17. The system of claim 11 wherein the ECU is configured to receive the threshold engine data from the calibration unit for monitoring the operation of the engine. 18. A method for calibrating an automobile engine monitoring system with a calibration unit, the method comprising: collecting crankshaft acceleration data for an engine operating under a non-malfunctioning condition, each of the crankshaft acceleration data for the engine operating under the non-malfunctioning condition correlated with an engine speed value and an engine load value;interpolating the crankshaft acceleration data for the engine operating under the non-malfunctioning condition in three dimensions;collecting crankshaft acceleration data for an engine operating under a malfunctioning condition, each of the crankshaft acceleration data for the engine operating under the malfunctioning condition correlated with an engine speed value and an engine load value;interpolating the crankshaft acceleration data for the engine operating under the malfunctioning condition in three dimensions; andgenerating threshold automobile data by offsetting from the three dimensional interpolation of the crankshaft acceleration data for the engine operating under the non-malfunctioning condition or the three dimensional interpolation of the crankshaft acceleration data for the engine operating under the malfunctioning condition.
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