Thermometer for engine of vehicle
First Claim
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1. A thermometer for an engine of a vehicle, comprising:
- a temperature/resistance element that is mounted on part of an engine incorporated in a vehicle and that detects the temperature of the engine as a change in resistance;
a resistance-frequency converter that is optionally connected to said temperature/resistance element and that converts the detected change in resistance into a change in frequency;
a computer that calculates the temperature of the engine on the basis of a frequency represented by an output of said resistance-frequency converter, and displays it on a display; and
a key entry unit for use in setting a warning temperature of the engine to a value selected from among a plurality of predetermined values and thus determining the warning temperature, wherein;
when a temperature of the engine exceeds the warning set temperature determined using said key entry unit, said computer instructs a warning indicator to give a warning indication;
the thermometer further comprising an engine speed detecting unit that detects an engine speed, wherein;
said computer calculates an engine speed on the basis of an output of said engine speed detecting unit;
when the calculated engine speed is equal to or higher than a shift timing point revolution speed and is equal to or lower than a shift timing warning set revolution speed, a shift timing indicator is actuated.
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Abstract
Provided is a thermometer that is mounted on an engine incorporated in a vehicle and that measures the temperature of the engine during running of the vehicle. A temperature/resistance element included in the thermometer senses the temperature of the engine all the time. The sensed temperature is displayed on a display. Furthermore, a temperature warning indicator indicates whether the sensed temperature exceeds a warning set temperature. While monitoring the sensed temperature and temperature warning indication, a driver can accelerate the vehicle or shift the transmission gear so as to retain a load on the engine in an optimal state.
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Citations
15 Claims
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1. A thermometer for an engine of a vehicle, comprising:
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a temperature/resistance element that is mounted on part of an engine incorporated in a vehicle and that detects the temperature of the engine as a change in resistance;
a resistance-frequency converter that is optionally connected to said temperature/resistance element and that converts the detected change in resistance into a change in frequency;
a computer that calculates the temperature of the engine on the basis of a frequency represented by an output of said resistance-frequency converter, and displays it on a display; and
a key entry unit for use in setting a warning temperature of the engine to a value selected from among a plurality of predetermined values and thus determining the warning temperature, wherein;
when a temperature of the engine exceeds the warning set temperature determined using said key entry unit, said computer instructs a warning indicator to give a warning indication;
the thermometer further comprising an engine speed detecting unit that detects an engine speed, wherein;
said computer calculates an engine speed on the basis of an output of said engine speed detecting unit;
when the calculated engine speed is equal to or higher than a shift timing point revolution speed and is equal to or lower than a shift timing warning set revolution speed, a shift timing indicator is actuated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A thermometer for an engine of a vehicle, comprising:
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a temperature/resistance element that is mounted on part of an engine incorporated in a vehicle and that detects the temperature of the engine as a change in resistance;
a resistance-frequency converter that is optionally connected to said temperature/resistance element and that converts the detected change in resistance into a change in frequency;
a computer that calculates the temperature of the engine on the basis of a frequency represented by an output of said resistance-frequency converter, and displays it on a display; and
a key entry unit for use in setting a warning temperature of the engine to a value selected from among a plurality of predetermined values and thus determining the warning temperature, wherein;
when the temperature of the engine exceeds the warning set temperature determined using said key entry unit, said computer instructs a warning indicator to give a warning indication;
the thermometer further comprising;
a battery voltage detecting unit that detects a voltage across a battery incorporated in the vehicle; and
converts the detected voltage into a frequency; and
a voltage warning indicator that when the voltage across the battery exceeds a pre-set warning voltage, gives a warning indication, wherein;
said computer calculates the voltage across the battery on the basis of the frequency represented by an output of said battery voltage detecting unit, and displays on said display the calculated voltage across the battery;
when the voltage across the battery exceeds the warning set voltage determined using said key entry unit, said voltage warning indicator gives a warning indication, wherein;
said battery voltage detecting unit includes a frequency division circuit that produces a signal whose frequency corresponds to an integral submultiple of the frequency into which the frequency of the voltage across the battery is converted and whose timing matches the data processing timing at which said computer processes data. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification