METHOD FOR DETERMINATION OF PERFORMANCE OF A VEHICLE ENGINE
First Claim
1. A method for rapid and accurate determination of the performance of a vehicle engine by interpreting the driving and resistive torques of said engine, the method comprising placing a detector in the vicinity of a rotating member of the engine to emit electrical signals, the frequency of said signals being proportional to the angular speed of the engine;
- recording said signals on a magnetic tape of a recorder independent of said detector during first and second phases of operation of said engine which has first been brought to its normal operation temperature, the first phase recording acceleration beginning with starting the engine and lasting until maximum speed is attained by the engine with a given full flow of fuel being maintained during this phase, the second phase recording deceleration lasting from maximum speed to complete stopping of said engine and commencing with suddenly cutting off the flow of fuel to the engine, said detector signals being recorded in a continuous manner on said magnetic tape during said two phases from start to stop of the engine;
transmitting the recorded signals on said magnetic tape to a computer having a program of established ideal parameters and enabled to calculate the angular speed, and derivatives thereof as a function of the time, of the engine corresponding to said signals in the acceleration phase and in the deceleration phase, and to establish tables and curves of the acceleration and of the driving torques corresponding to said first phase and resistive torques and deceleration corresponding to said second phase as a function of said angular speed relative to said established parameters whereby the condition of said engine can be diagnosed.
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Abstract
The method consists of recording on a magnetic tape the electric signal from a detector placed in the vicinity of a rotating member of the engine, the frequency of this signal being proportional to the angular speed of the engine during an acceleration phase at full throttle and a deceleration phase with fuel cut-off and stopping of the engine. The same tape also records the signals from a frequency calibrating device and the whole of the information recorded is treated by a computer adapted to establish various comparative data concerning the angular speeds and the driving and resistive torques of the engine. The device comprises an electro-magnetic detector, an electronic casing with a calibrating oscillator and a tape recorder connected to the electronic casing.
18 Citations
2 Claims
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1. A method for rapid and accurate determination of the performance of a vehicle engine by interpreting the driving and resistive torques of said engine, the method comprising placing a detector in the vicinity of a rotating member of the engine to emit electrical signals, the frequency of said signals being proportional to the angular speed of the engine;
- recording said signals on a magnetic tape of a recorder independent of said detector during first and second phases of operation of said engine which has first been brought to its normal operation temperature, the first phase recording acceleration beginning with starting the engine and lasting until maximum speed is attained by the engine with a given full flow of fuel being maintained during this phase, the second phase recording deceleration lasting from maximum speed to complete stopping of said engine and commencing with suddenly cutting off the flow of fuel to the engine, said detector signals being recorded in a continuous manner on said magnetic tape during said two phases from start to stop of the engine;
transmitting the recorded signals on said magnetic tape to a computer having a program of established ideal parameters and enabled to calculate the angular speed, and derivatives thereof as a function of the time, of the engine corresponding to said signals in the acceleration phase and in the deceleration phase, and to establish tables and curves of the acceleration and of the driving torques corresponding to said first phase and resistive torques and deceleration corresponding to said second phase as a function of said angular speed relative to said established parameters whereby the condition of said engine can be diagnosed.
- recording said signals on a magnetic tape of a recorder independent of said detector during first and second phases of operation of said engine which has first been brought to its normal operation temperature, the first phase recording acceleration beginning with starting the engine and lasting until maximum speed is attained by the engine with a given full flow of fuel being maintained during this phase, the second phase recording deceleration lasting from maximum speed to complete stopping of said engine and commencing with suddenly cutting off the flow of fuel to the engine, said detector signals being recorded in a continuous manner on said magnetic tape during said two phases from start to stop of the engine;
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2. A method according to claim 1, further comprising recording on said magnetic tape of said recorder signals emitted with a predetermined reference frequency by a precision frequency calibrating electronic oscillator, said oscillator recorder signals permitting said computer treating the recorded signals to make corrections for speed and unwinding faults inherent within said recorder.
Specification
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- Resources
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Current AssigneeJean Paul Sibeud
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Original AssigneeJean Paul Sibeud
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InventorsSibeud, Jean Paul
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Primary Examiner(s)Myracle, Jerry W.
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Application NumberUS04/886,215Time in Patent Office859 DaysField of Search73/116,117.3,117.2US Class Current73/114.15CPC Class CodesG01M 15/044 by monitoring power, e.g. b...
