Real-time vehicle data acquisition and analysis
First Claim
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1. A vehicle data collection system, the system comprising:
- a vehicle comprising a driveshaft and an engine controller, the engine controller comprising;
a processor configured to;
determine driveshaft torque data by utilizing a simulation model to calculate torque at the driveshaft based on a set of vehicle data including at least one of a vehicle throttle position, a vehicle axle ratio, and a vehicle axle weight, wherein the driveshaft torque data (i) represents torque at the driveshaft for each revolution of the driveshaft over a period in a time-domain and (ii) comprises a plurality of peaks and valleys corresponding to local driveshaft torque maximums and minimums, andusing the driveshaft torque data, generate a revolutions-at-torque output comprising (i) a plurality of distinct ranges of driveshaft torque and (ii) counts for each driveshaft torque range, each count being indicative of a particular driveshaft torque of the driveshaft torque data falling within a particular driveshaft torque range, anda memory (i) having a limited capacity such that it is incapable of storing the driveshaft torque data and (ii) configured to store information comprising the revolutions-at-torque output; and
a data collection device configured to download the information from the memory.
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Abstract
An engine controller, system and method for collecting vehicle data. Drive torque data is determined using the engine controller in the vehicle and is stored in a memory in the vehicle. The drive torque data is stored in a non-time domain format, and may include a histogram of numbers of revolutions at predetermined intervals of drive torque values and/or a matrix of rainflow cycle counts. The drive torque data is temporarily stored in a buffer prior to being stored in the matrix of rainflow cycle counts using back-checking and binning. The drive torque data is downloaded from the vehicle and transmitted to a central data collection center.
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Citations
17 Claims
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1. A vehicle data collection system, the system comprising:
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a vehicle comprising a driveshaft and an engine controller, the engine controller comprising; a processor configured to; determine driveshaft torque data by utilizing a simulation model to calculate torque at the driveshaft based on a set of vehicle data including at least one of a vehicle throttle position, a vehicle axle ratio, and a vehicle axle weight, wherein the driveshaft torque data (i) represents torque at the driveshaft for each revolution of the driveshaft over a period in a time-domain and (ii) comprises a plurality of peaks and valleys corresponding to local driveshaft torque maximums and minimums, and using the driveshaft torque data, generate a revolutions-at-torque output comprising (i) a plurality of distinct ranges of driveshaft torque and (ii) counts for each driveshaft torque range, each count being indicative of a particular driveshaft torque of the driveshaft torque data falling within a particular driveshaft torque range, and a memory (i) having a limited capacity such that it is incapable of storing the driveshaft torque data and (ii) configured to store information comprising the revolutions-at-torque output; and a data collection device configured to download the information from the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for obtaining and storing driveshaft torque data for a vehicle comprising a driveshaft and an engine controller, the method comprising:
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determining, by a processor of the engine controller, driveshaft torque data by utilizing a simulation model to calculate the torque at the driveshaft based on a set of vehicle data including at least one of a vehicle throttle position, a vehicle axle ratio, and a vehicle axle weight, wherein the driveshaft torque data (i) represents torque at the driveshaft for each revolution of the driveshaft over a period in a time-domain and (ii) comprises a plurality of peaks and valleys corresponding to local driveshaft torque maximums and minimums, utilizing, by the processor, a buffer of a memory of the engine controller to perform rainflow processing on the driveshaft torque data by; applying a rainflow cycle counting rule to organize the driveshaft torque data into rainflow cycles, and generating a rainflow matrix comprising the rainflow cycles; storing, by the memory, information comprising the rainflow matrix, the memory having a limited capacity such that it is incapable of storing the driveshaft torque data; and downloading, from the engine controller by a data collection device, the information. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A vehicle data collection system, the system comprising:
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a vehicle comprising a driveshaft and an engine controller, the engine controller comprising; a processor configured to; obtain driveshaft torque data that represents torque at the driveshaft for each revolution of the driveshaft over a period in a time-domain, the driveshaft torque data comprising a plurality of peaks and valleys corresponding to local driveshaft torque maximums and minimums, and using the driveshaft torque data, generate a revolutions-at-torque output comprising (i) a plurality of distinct ranges of driveshaft torque and (ii) counts for each driveshaft torque range, each count being indicative of a particular driveshaft torque of the driveshaft torque data falling within a particular driveshaft torque range, and a memory (i) having a limited capacity such that it is incapable of storing the driveshaft torque data and (ii) configured to store information comprising the revolutions-at-torque output; a data collection device configured to download the information from the memory when the vehicle is being serviced; and a central data collection center configured to; receive the downloaded information upon transmission by the data collection device; and utilize the information to predict a useful life of at least one of the driveshaft and a component related to the driveshaft by; converting the revolutions-at-torque output to a histogram plot; and utilizing the histogram plot to estimate a fatigue experienced by the at least one of the driveshaft and the driveshaft-related component at each of the plurality of distinct ranges of driveshaft torque.
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Specification