JP2002250249A - Multi-functional thermometer of engine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To indicate the temperature and rotational frequency of an engine and the voltage of a battery mounted on a vehicle by attaching a multi- functional thermometer to the vehicle afterward and to display a warning when the indicated values exceed set values. SOLUTION: The temperature of the engine and the voltage of the battery mounted on the vehicle calculated by a computer are indicated on an indicator 14. When the temperature of the engine exceeds a warning temperature, the warning is displayed in a temperature warning indicator 18, and when the voltage of the battery exceeds a warning voltage, the warning is displayed in a voltage warning indicator 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional thermometer for a vehicle engine which is attached to a motorcycle or a four-wheeled vehicle and measures an engine temperature, a vehicle-mounted battery voltage and an engine speed.

[0002]

2. Description of the Related Art A motorcycle or a four-wheeled vehicle for racing (including a cart) is not equipped with a thermometer that measures the temperature of an engine that changes momentarily during traveling and digitally displays the measurement result. Here, measurement of the temperature of the engine means not only directly measuring the temperature of the engine body including the cylinder using a sensor, but also measuring the temperature of the cooling water flowing through a water pipe connecting the radiator or the water jacket of the cylinder to the radiator. Or measuring the temperature of the circulating oil flowing in the oil pan below the engine body or in the oil circulation path. On the other hand, controlling the temperature of the engine during the race is extremely important for operating the engine efficiently and stably obtaining a predetermined vehicle speed. Overheating of the engine and accompanying burning of the pistons and valves due to this temperature management are important. Accidents such as sticking can be avoided.

During a race, it is necessary to perform a shift-up operation and a shift-down operation in accordance with driving conditions, that is, in accordance with the number of revolutions of the engine, and the driver performs these operations with his / her intuition. I have.

[0004]

However, such conventional motorcycles and four-wheeled vehicles are not provided with a thermometer for digitally displaying the temperature of an ever-changing engine as described above. There is a problem in that, for example, the vehicle relies solely on one's intuition to perform acceleration or shift change, and therefore performs the driving operation without sufficiently bringing out the performance of the engine. In addition, there is a problem that the engine, the gearbox or the clutch is seriously damaged by a shift change at an overspeed of the engine, that is, in an overheated state.

The present invention solves the above-mentioned problem, and can be attached to an existing motorcycle or four-wheeled vehicle to display an ever-changing engine temperature, a vehicle-mounted battery voltage, an engine speed, and the like. Along with
It is an object of the present invention to provide a multifunctional thermometer for a vehicle engine capable of displaying an alarm when the temperature of the engine, the battery voltage on the vehicle, the number of revolutions of the engine, and the like exceed respective set values.

[0006]

To achieve the above object,
A multi-function thermometer for a vehicle engine according to the present invention is mounted on a part of an engine mounted on a vehicle, and detects a temperature of the engine as a change in a resistance value, and a temperature / resistance element; A resistance / frequency converter which is retrofitted to the temperature / resistance element and converts the detected change in the resistance value into a frequency change, and a battery voltage which detects the frequency of the battery mounted on the vehicle and converts the frequency A computer that calculates a temperature of the engine to a value of Celsius and Fahrenheit based on a detection unit and an output frequency of the resistance value / frequency converter, and calculates a battery voltage based on an output frequency of the battery voltage detection unit A display for displaying the temperature of the engine and the voltage of the battery calculated by the computer; and a warning temperature of the engine and a display of the battery. A key input section for selectively setting each of the warning voltages, and when the temperature of the engine exceeds the warning temperature set by the key input section, a warning is displayed on a temperature warning display. When the voltage of the battery exceeds the warning voltage set by the key input unit, a warning is displayed on a voltage warning indicator. This allows the driver to immediately recognize whether or not the battery voltage and the ever-changing engine temperature have reached the set alarm level, to allow the vehicle to operate under optimal driving conditions, and to improve the battery quality. Deterioration can be prevented.

A multi-function thermometer for a vehicle engine according to an embodiment of the present invention is mounted on a part of an engine mounted on a vehicle and detects the temperature of the engine as a change in resistance value. A temperature / resistance element, a resistance / frequency converter that is attached to the temperature / resistance element and converts the detected change in resistance value into a frequency change, and an engine speed that detects the engine speed. A number detector, and a computer that calculates an engine temperature into Celsius and Fahrenheit values based on an output frequency of the resistance value / frequency converter and calculates an engine speed based on an output of the engine speed detector. A display for displaying the temperature of the engine calculated by the computer; a key input unit for setting a warning temperature of the engine; A temperature warning indicator for displaying a warning when the temperature exceeds the warning temperature set by the input unit; and a shift timing point rotation set by the key input unit when the engine speed detected by the engine speed detection unit is set. The shift timing point indicator is activated when the number of rotations is equal to or more than the number and equal to or less than the set rotation of the shift timing warning. This allows the display of the ever-changing engine temperature and the driver's awareness of whether or not the temperature has reached the set alarm level, as well as grasping the shift timing point suitable for the engine speed. Thus, an efficient engine drive corresponding to the vehicle speed can be realized.

According to a third aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine according to the third aspect of the present invention, wherein the battery voltage detecting unit transmits a frequency signal converted from a battery voltage to a data processing timing in the computer. Is provided with a frequency dividing circuit that divides the frequency to a frequency that matches According to this, the voltage of the battery detected in analog can be converted into a signal that can be processed by the computer, and the internal processing can be performed quickly.

According to a fourth aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine according to the first aspect of the present invention.
Keys that enable the user to input, operate, or automatically store, display, and reset the maximum temperature of the engine, and automatically or manually turn on / off the functions of the circuit components when the engine starts and stops. It is a matrix. Thereby, one or a plurality of modes can be selected and set in the key input unit having one compact configuration.

According to a fifth aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine according to the present invention, wherein a stopwatch measurement, a lap measurement, a split measurement, a lap / split measurement set by the key input unit are provided to the computer. According to the stopwatch mode including the memory, the display unit can display each measurement time during the running of the vehicle. This allows the racer to quickly see lap times and split times while driving,
The vehicle speed per unit time can be easily checked.

In the multi-function thermometer for a vehicle engine according to an embodiment of the present invention, the temperature of the engine obtained through a resistance / frequency converter is measured by the computer. It has a function of converting one of them into the other. According to this,
The display based on the Celsius temperature and the Fahrenheit temperature can be selectively performed.

According to another aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine, wherein the temperature of the engine obtained through the resistance / frequency converter is displayed in either Celsius or Fahrenheit. A Celsius / Fahrenheit display setting unit is provided for setting whether or not to display on the container for the computer. According to this, the display based on the Celsius temperature and the Fahrenheit temperature can be selectively performed by an external operation.

According to another aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine, wherein the computer excludes a function of measuring the time by a timer after a lapse of a set time after the engine is stopped. The functions of all the circuits are automatically stopped. This allows
Unnecessary power supply to each circuit is stopped while the operation is stopped or stopped, so that the power consumption of a built-in battery (such as a lithium battery) can be reduced.

According to a ninth aspect of the present invention, there is provided a multi-function thermometer for a vehicle engine according to the first aspect of the present invention, wherein the engine speed detected by the engine speed detecting section is adjusted by a shift timing set by the key input section. The shift timing warning indicator is driven when the number of rotations exceeds the warning set speed. Thus, it is possible to avoid performing a shift change when the set timing warning rotation speed is exceeded.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a thermometer for a vehicle engine according to the present invention. In FIG. 1, reference numeral 11 denotes a thermometer mounted on a part of an engine mounted on a vehicle and detects the temperature of the engine as a change in resistance value. A temperature / resistance element such as a thermistor as a temperature detecting section, and a resistance / frequency 12 for converting a change in resistance value detected by the temperature / resistance element 11 into a change in frequency suitable for data processing by a computer described later. It is a converter. The resistance / frequency converter 12 is provided on the computer side,
Externally connected to the resistance element 11 using a lead or the like. The reference numeral 13 also calculates the temperature of the engine based on the output frequency of the resistance value / frequency converter 12 and displays the calculated temperature on a display unit 14. Is a computer that calculates the voltage of the battery and displays it on the display unit 14.

The battery voltage detector 15 includes a voltage / frequency converter 15c for converting the terminal voltage of a battery 15b as a vehicle-mounted battery connected in series to an ignition key switch 15a. And a frequency dividing circuit 15d for taking the output frequency of the circuit 15c into the computer 13 and dividing the output frequency to a frequency which can be easily processed.

The computer 13 is connected to the resistor /
It functions to calculate the temperature data obtained via the frequency converter 12 into one of Celsius and Fahrenheit, and to calculate the battery voltage based on the detection output of the battery voltage detector 15. Further, the computer 13 functions to display the temperature of the engine on the display unit 14 as a numerical value of Celsius or Fahrenheit in accordance with the setting of the switch of the Celsius / Fahrenheit temperature display setting unit 16 or the like.

Reference numeral 17 denotes various settings such as storage, display and reset of a warning temperature of an engine, a warning voltage of a battery, and a maximum temperature, a clock time, and automatic or manual stop of a circuit function other than the clock after the engine is stopped. 5 is a key matrix as a key input unit for performing a key operation. The key matrix 17 is provided with a plurality of key switches for performing the respective settings.
Reference numeral 18 denotes a temperature warning indicator (for example, an LED) for causing the computer 13 to perform a warning display when the temperature of the engine exceeds a warning set temperature set by the key matrix 17.

FIG. 2 shows a computer 13, a display 14, a battery voltage detector 15, a Celsius / Fahrenheit temperature display setting unit 1.
6, key matrix 17, temperature warning display 18, and voltage warning display 19 (for example, LED, etc.)
1 is a perspective view showing a multi-function thermometer of a vehicle engine in which is stored in a case 20. In the figure, reference numeral 21 denotes a connector lead-connected to the computer 13, which can be retrofitted to a connection terminal (not shown) of the temperature / resistance element 11 mounted on a part of the engine. Reference numeral 22 denotes a computer 13 in the case 20 mounted on a vehicle.
This is a connector having a terminal that is lead-connected to a power supply terminal connected to an electrode of a battery via an ignition key switch as an external power supply that supplies power to each device except a circuit.

Next, the general operation of the vehicle engine centered on the computer 13 will be described with reference to the flowchart of FIG. When the power switch is turned on, first, various counters, registers, and the like are initialized (step S1), and then the main program is started (step S2). After the processing by the main program, clock processing such as generation of a reference clock and clock counting based on a timer output in the computer 13 is performed (step S3). Next, key operation processing for setting various data on the key matrix 17 to instruct data processing by the computer 13 is started (step S4). First, the engine temperature measurement processing according to the present invention is executed (step S5). Then, the voltage measurement processing and the SVD processing of the battery 15b are executed (steps S6 and S7), and the processing results are displayed on the display (step S8). At the end of the program, the halt processing is performed (step S8). S9) After this halt processing (step S10), the processing after step S3 is executed again.

FIG. 4 is a flowchart showing the procedure of the temperature measurement process of FIG. First, when the temperature measurement by the temperature / resistance element 11 is started, it is checked whether or not the temperature measurement flag is on (step S1).
1) If not standing, it is checked whether, for example, 2.5 seconds have elapsed (step S12). Then, this 2.5
After a lapse of seconds, the flag is turned off (step S13). This 2.5 seconds is a temperature measurement interval. Therefore, the temperature measurement is started, and the temperature measurement flag is set (step S14).
Set the counter of the computer 13 (step S
15). Subsequently, after resetting the interrupt factor flag of the resistance / frequency converter 12 and returning to the state before the interruption (step S16), the operation of the resistance / frequency converter is started (step S17). Next, a warning temperature set value is set to the input port from the key matrix 17 which is also used as a warning temperature setting unit (step S18), and it is determined whether there is a warning signal at Celsius temperature (step S19). Then, it is determined whether there is a warning signal at the Fahrenheit temperature (step S2).
0), if so, a warning process is executed (step S21).

On the other hand, when it is determined in step S11 that the temperature measurement flag is set, whether or not 0.45 seconds have elapsed is checked (step S22), and it is determined that 0.45 seconds has elapsed. If so, the flag for time over and temperature measurement is turned off (step S23),
The operation of the resistance / frequency converter 12 is stopped (Step S24). Subsequently, warning temperature data on a predetermined table (not shown) is set by a counter of the computer 13 (step S25), and it is determined whether the measured temperature is higher or lower than the warning set temperature (step ST).
26, step S27), when the temperature is high and when the temperature is low, the temperature data is set (step S29), and the processing from step S18 is executed thereafter. On the other hand, if the temperature is neither high nor low, temperature conversion by HEX (hexadecimal) is performed (step S28), and the processing from step S18 is executed.

If it is determined in step S22 that 0.45 seconds have not elapsed, it is checked whether or not the temperature measurement has been completed (step S30). After turning off (step S3
1) Check whether the time base count is over (step S32). If not, check whether the measurement count is over (step S33). Executes the processing from step S25. If the time base count and the measurement count are over, over data sets are respectively performed (step S34, step S35), and the processing from step S25 is performed. On the other hand, if it is determined in step S30 that the temperature measurement has not been completed, the process proceeds to step S18.
Perform the following processing.

FIG. 5 is a flowchart showing in detail the procedure of display processing by the computer 13.
Here, first, the display of the temperature measurement data is set (step S41), and the display of the high (Hi) and low (Lo) of the measured temperature is set (step S42). This display is processing when the temperature is out of the set temperature measurement range. Next, it is checked whether or not there is a display of high or low temperature (step S4).
3) If there is no display temperature, the display temperature is output to a display buffer (not shown) (step S44), and then "H" is output for 7 segments.
"i" or "Lo" is displayed (step S45).
If there is a display of high or low temperature, a 4-digit display is directly performed in 7 segments. Next, it is checked whether or not the high / low temperature flag is set. If the flag is set, the temperature display of the Celsius and Fahrenheit numerical values by Celsius and Fahrenheit is turned off (step S47), and the-(minus) mark is set Turn off (step S48).

On the other hand, if it is determined in step S46 that the high and low flags are not on, it is determined whether or not the current temperature display mode is the Fahrenheit mode (step S49). The display is performed (step S50). If the mode is not the Fahrenheit mode, the temperature is displayed in Celsius (step S51), and the-mark is turned on and off (step S52).

FIG. 6 is a flowchart showing the procedure of the temperature warning process by the computer 13. First, it is determined whether or not a high (Hi) flag has been set by outputting a warning signal (step S61). If the high flag has been set, a warning signal is output to an output port (step S62). On the other hand, when the high flag is not set, the low (L
o) Check whether the flag has been set (step S63),
When the low flag is set, no warning signal is output to the output port (step S64).

If the low flag is not set, the warning temperature set value is compared with the measured temperature (step S6).
5) It is checked whether the measured temperature is lower than the warning temperature set value (step S66). If smaller,
A warning signal is not output (step S64), and if not, a warning signal is output (step S64).
62).

As described above, according to the present invention, the warning set temperature can be set to an arbitrary value which is different every 1 degree Celsius, for example, and the set warning temperature is set to the temperature / resistance element 11.
When the temperature of the engine detected by the above is exceeded, the temperature warning display 18 (for example, LED) is caused to give an alarm, so that the driver is urged to perform a driving operation in a direction to lower the engine temperature. it can. As a result, overheating of the engine can be prevented. In this case, the temperature measurement can be performed in both Celsius and Fahrenheit units, and the warning set temperature can be arbitrarily set in either Celsius or Fahrenheit units. The driver can also recognize the engine temperature for preventing the overheating and appropriately perform the driving operation based on this.

FIG. 7 is a flowchart showing in detail the procedure of the voltage measurement processing by the computer 13. Here, when the voltage measurement is started, a voltage calculation flag is set (step S71), a voltage calculation is performed based on the detection output of the battery voltage detection unit 15 (step S72), and a low (Lo) flag is set for the calculated voltage value. Is checked (step S73). If the low flag is set, a high (H) signal is output to the output port, and the voltage warning indicator 19 (eg, LED) performs a warning display. (Step S74), the voltage measurement flag is turned off, and the process ends (Step S75).

On the other hand, if it is determined in step S73 that the low flag has not been set, then it is checked whether or not the high flag has been set (step S76). It is checked whether or not the voltage is equal to or lower than a preset 11.5 V (step S77). If the voltage is equal to or lower than 11.5V, the processing after step S74 is executed. A low (L) signal is output to the output port (step S78), and the process of step S75 is executed. If the high (Hi) flag is set in step S76, a low signal is immediately output to the output port.

FIG. 8 is a flowchart showing in detail the procedure of the SVD measurement processing by the computer 13. This S
In the VD measurement, a voltage of, for example, a lithium battery (3.0 V) that drives a computer 13 built in the apparatus is set to a set voltage value (for example, 2.4 V, 2.5 V, 2.6 V, 2.7).
V) is measured to determine whether it has decreased. First, when the computer 13 is requested to measure the voltage of the internal battery (step S81), an SVD measurement request flag is set (step S81).
82), the SVD request input becomes “1” (step S8)
3). Thereafter, after a predetermined time (200 μs) (step S84), the SVD request input becomes “0” (step S85). Subsequently, it is checked whether or not the SVD measurement result is "1" (step S86).
The flag of the W battery is set (step S87), and "1"
If not, the LOW battery flag is turned off and the process ends (step S88).

FIG. 9 is a block diagram showing another embodiment of the present invention, which is different from that shown in FIG. 1 in that an engine speed detector 3 for detecting the engine speed is provided.
1. In addition to having a shift timing point indicator 32 and a shift timing warning indicator 33, keys for setting a shift timing point rotation speed and a shift timing warning rotation speed setting are added to the key matrix 17.

Therefore, when the driver sets the shift timing point rotation speed (for example, 9,000 rpm) by operating the switch of the key matrix 17, the engine rotation speed is not less than the shift timing point rotation speed, and The shift timing point indicator 32 can be turned on or off when the computer 16 determines that the motor 16 is rotating at or below the shift timing warning rotation speed (for example, 10,000 rpm). Therefore, the racer can shift the shift gear under the optimum condition at the timing of lighting or blinking.

When a shift timing warning rotation speed is set by operating the key matrix 17, when the engine rotation speed reaches the shift timing warning rotation speed, the computer 13 turns on the shift timing warning indicator 33. Outputs a signal and turns it on or off. Therefore, the driver can set the shift timing warning indicator 33
It is possible to recognize the prohibition of the gear shift operation by turning on or blinking, and it is possible to prevent the destruction of the gear box, the clutch, and the like due to excessive gear shift.

The engine speed detecting section 31
Ignition noise detector 31 for detecting engine lighting noise
a, and a waveform shaping circuit 31b that performs a waveform shaping process on the ignition noise to convert the ignition noise into a rectangular pulse signal and supplies it to the computer 13. Further, in this embodiment, by arranging two temperature / resistance elements 11 in parallel, the temperature of the engine can be monitored at two places at the same time, whereby the temperature can be detected with high accuracy.

The key matrix 17 is capable of arbitrarily selecting a stopwatch measurement, a lap measurement, a split measurement, and a lap / split memory function by a key operation. By connecting external operation switches in parallel, the operation /
The stop can be set arbitrarily even while the vehicle is running. Further, by providing the key matrix 17 with a vehicle-mounted engine selection switch, the type of the engine to be measured can be arbitrarily set.

Further, by using a light emitting diode as a light source, a backlight composed of a light guide plate which emits surface light by refracting light at right angles to the traveling direction of the light is arranged below the liquid crystal display panel, so that FIGS. The display data such as the temperature and the battery voltage can be clearly read even when the liquid crystal display panel used as the display 14 as shown in FIG.

FIG. 10 is a perspective view of the multi-function thermometer shown in FIG. 9, and includes two temperature resistance elements 11a and 11b, the computer 13, a display 14, a battery voltage detector 15, and a Celsius / Fahrenheit temperature display setting unit 16. , A key matrix 17, two temperature warning indicators 18a and 18b, a voltage warning indicator 19, an engine speed detector 31, a shift timing point indicator 32 and a shift timing warning indicator 33 are housed in a case. In the same figure, reference numerals 35 and 36 denote connectors lead-connected to the computer 13, and these are two temperature / resistance elements 11 mounted on a part of the engine.
The connection terminals a and 11b can be connected later.

Reference numeral 37 denotes a connector having a terminal lead-connected to a power supply terminal connected to a vehicle-mounted battery for supplying power to each device except the computer circuit in the case 34 mounted on the vehicle. Reference numerals 38 and 39 denote connectors for connecting external operation switches connected in parallel to the operation switches of the key matrix 17 as described above. Numeral 40 denotes an antenna lead which constitutes a part of the engine speed detecting section 31, which functions to detect ignition noise of the engine by electromagnetic induction.

Therefore, the computer 13 is connected to the connector 3
The engine temperature data is obtained from the temperature / resistance elements 11a and 11b through 5, 36, and the power supply voltage can be input through the connector 37. The computer 13 enables input from an external switch through connectors 38 and 39.

In this embodiment, as described above, when the engine speed detected by the engine speed detection unit 31 is within the shift timing point speed less than or equal to the shift timing warning speed, the shift timing point indicator 32 is used. This is displayed so that the driver can recognize that the gearshift operation is possible. Further, when the shift timing warning rotation speed is exceeded, the shift timing warning indicator 33 is lit to display an instruction to prohibit the operation of the cashift in the engine rotation speed range to the driver.

[0042]

As described above, according to the present invention, when the temperature of the engine exceeds the warning temperature set by the key input unit, a warning display is displayed on the temperature warning display, and the voltage of the battery is inputted by the key input. The warning message is displayed on the voltage warning indicator when the warning voltage exceeds the warning voltage set by the driver, so that the driver can determine whether the vehicle battery voltage and the ever-changing engine temperature have reached the set alarm level. , So that the vehicle can be driven under optimal conditions,
The effect that deterioration of the quality of the vehicle battery can be prevented can be obtained.

Further, according to the present invention, when the engine speed detected by the engine speed detecting section is equal to or more than the shift timing point speed set respectively by the key input section,
The shift timing point indicator is driven when the rotation becomes lower than the set rotation of the shift timing warning, so that the engine temperature that changes every moment and the driver knows whether or not the temperature has reached the set alarm level are displayed. And the shift timing point suitable for the engine speed can be grasped.
Efficient engine drive for vehicle speed can be realized. Furthermore, when the engine speed detected by the engine speed detection unit is equal to or higher than the shift timing warning set speed set by the key input unit, the shift timing warning indicator is driven,
By recognizing the shift timing warning, an effect is obtained that an erroneous gear shift operation can be avoided.

Further, according to the present invention, by performing a warning (for example, 11.5 V or less) of a battery voltage drop,
In addition to facilitating quality control of the battery, measurement and display of the type of engine (the number of cycles and the number of cylinders) and the number of revolutions enable timely maintenance of the engine. Furthermore, by shutting off the power supply to all the circuits except the clock after the engine is stopped, there is an advantage that the consumption of a battery such as a lithium battery housed in the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a multifunctional thermometer for a vehicle engine according to an embodiment of the present invention.

FIG. 2 is a perspective view of the multifunctional thermometer of the vehicle engine shown in FIG.

FIG. 3 is a flowchart showing the flow of operation of the entire multifunctional thermometer of the vehicle engine according to the present invention.

FIG. 4 is a flowchart showing a procedure of a temperature measurement process in FIG. 3 in detail.

FIG. 5 is a flowchart showing details of a display processing procedure in FIG. 3;

FIG. 6 is a flowchart showing in detail a procedure of a warning process according to the present invention.

FIG. 7 is a flowchart showing in detail a procedure of a voltage measurement process in FIG. 3;

FIG. 8 is a flowchart showing details of a procedure of an SVD measurement process in FIG. 3;

FIG. 9 is a block diagram showing a multi-function thermometer for a vehicle engine according to another embodiment of the present invention.

10 is a perspective view of the multifunctional thermometer of the vehicle engine shown in FIG.

[Explanation of symbols]

 11, 11a, 11b Temperature / resistance element 12 Resistance / frequency converter 13 Computer 14 Display 15 Battery voltage detector 16 Celsius / Fahrenheit temperature display setting unit 17 Key input unit 18, 18a, 18b Temperature warning display 19 Voltage warning Display 31 Engine speed detector 32 Shift timing point indicator 33 Shift timing warning indicator

Claims (9)

[Claims] 1. A temperature / resistance element mounted on a part of an engine mounted on a vehicle and detecting the temperature of the engine as a change in resistance value, and a temperature / resistance element attached to the temperature / resistance element and detected. A resistance value / frequency converter for converting the change in the resistance value into a frequency change, a battery voltage detection unit for detecting the voltage of a battery mounted on the vehicle and converting the frequency, and A computer that calculates the temperature of the engine to a value of degrees Celsius and Fahrenheit based on an output frequency, and calculates a voltage of the battery based on an output frequency of the battery voltage detection unit; and a temperature and a temperature of the engine calculated by the computer. A display for displaying the voltage of the battery, and each setting of the warning temperature of the engine and the warning voltage of the battery can be selectively performed. A key input unit, a temperature warning indicator for displaying a warning when the temperature of the engine exceeds the warning temperature set by the key input unit, and a voltage of the battery is set by the key input unit. A voltage warning display for displaying a warning when the warning voltage is exceeded. 2. A temperature / resistance element mounted on a part of an engine mounted on a vehicle and detecting the temperature of the engine as a change in resistance value, and a temperature / resistance element attached to the temperature / resistance element for detection. A resistance value / frequency converter that converts the change in the resistance value into a frequency change, an engine speed detection unit that detects the engine speed, and the engine based on an output frequency of the resistance value / frequency converter. A computer for calculating the temperature of Celsius and Fahrenheit and calculating the engine speed based on the output of the engine speed detector, an indicator for displaying the engine temperature calculated by the computer, A key input unit for setting a warning temperature of the engine; and a warning when the temperature of the engine exceeds the warning temperature set by the key input unit. A temperature warning indicator for displaying the engine speed, and the engine speed detected by the engine speed detection unit is equal to or higher than the shift timing point speed set by the key input unit and equal to or lower than the shift timing warning set speed. A multi-function thermometer for a vehicle engine, comprising: a shift timing point indicator that is activated when the shift timing point indicator is turned on. 3. The computer according to claim 1, wherein the battery voltage detecting unit has a frequency dividing circuit for dividing a frequency signal obtained by frequency-converting the voltage of the battery into a frequency matching data processing timing in the computer. Item 1
A multifunctional thermometer for a vehicle engine according to claim 1. 4. The key input unit includes: a temperature warning, a voltage warning, a clock time setting, a storage, display, and reset of an engine maximum temperature; and a function of turning on or off a function of each circuit unit when the engine is started and stopped. 2. The multi-function thermometer for a vehicle engine according to claim 1, wherein the key matrix enables the automatic on / off operation to be performed by manual operation of each key. 5. The computer displays, according to a stopwatch mode including a stopwatch measurement, a lap measurement, a split measurement, and a lap / split memory set by the key input unit, a display of each measurement time during vehicle running on the display. The multi-function thermometer for a vehicle engine according to claim 1 or 2, wherein the thermometer is operated. 6. The computer according to claim 1, wherein the computer has a function of converting an engine temperature obtained through the resistance value / frequency converter from one of Celsius and Fahrenheit to the other. A multifunctional thermometer for a vehicle engine according to claim 2. 7. A Celsius / Fahrenheit display setting unit for setting to the computer whether the temperature of the engine obtained through the resistance / frequency converter is displayed on the display in Celsius or Fahrenheit. The multifunctional thermometer for a vehicle engine according to claim 1 or 2, wherein 8. The computer according to claim 1, wherein after a lapse of a set time after the engine is stopped, the computer automatically stops functions of all other circuits except a time keeping function of the time by a timer. Item 3. A multifunctional thermometer for a vehicle engine according to item 2. 9. A shift timing warning indicator which is driven when an engine speed detected by the engine speed detecting section is equal to or higher than a shift timing warning set speed set by the key input section. The multifunctional thermometer for a vehicle engine according to claim 2, wherein