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Data recording method for a marine propulsion device
| Details |
Inventors: Snyder, Richard H.; Haddad, Robert E.; Basso, Steven M.;
Assignee: Brunswick Corporation (Lake Fores, IL)
Primary Examiner: Beaulieu; Yonel
Assistant Examiner:
Attorney, Agent or Firm: Lanyi; William D.
A data storing method for a marine propulsion system uses two groups of three data logs each in which each data log comprises a plurality of data records. The information on preselected parameters are stored into the data records of the three data logs at different time increments. This allows the three data logs to cover a relatively long period of time at a lesser resolution, a shortest period of time at a highest resolution, and an intermediate period of time at an intermediate resolution. This allows an analyst to carefully review the various parameter magnitudes during the periods of time immediately preceding a catastrophic event, such as an accident or an engine failure, either of which resulting in an engine shut down. |
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DETAILED DESCRIPTION A data recording method, in accordance with the preferred embodiment of the present invention, comprises the steps of providing first and second groups of data logs.
The data logs can be three in number in each group and each data log can comprise twenty data records.
Information is stored at different rates in each of the data logs.
The present invention further comprises the step of monitoring an operating status of the marine propulsion device, such as an outboard motor, inboard engine, or stern drive unit.
Throughout the description of the present invention, "outboard motor" shall be used to mean any marine propulsion device which comprises an engine and is attachable to a transom of a marine vessel.
The operating status can be represented by the on/off status as represented by an ignition switch or ignition key.
The recording method of the present invention further comprises a step of measuring a magnitude of a first parameter.
The first parameter can be selected from a group consisting of engine speed (RPM), engine running time, boat speed, steering angle, trim position, throttle position, or gear selection.
In addition, embodiments of the present invention can measure the magnitude of a plurality of parameters, in which each of the plurality of parameters is treated in a manner similar to the method described below.
The method of the present invention further comprises the step of measuring elapsed time.
This can be accomplished by a standard internal clock of a micro processor that measures time as a series of incremental events at a known rate, such as one event every one hundred milliseconds (0.
1 second).
The present invention further comprises the step of selecting one of the first and second groups of data logs.
This selection is made as a function of a change in the operating status of the marine propulsion device and as a further function of the identity of a previously selected one of the first and second groups.
The change in the operating status of the marine propulsion device is typically a change from an "off" condition of the ignition to an "on" condition of the ignition switch
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