JPS637863Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device that provides an indication to the driver so that the engine of the automobile is operated in a desirable state in terms of fuel efficiency and acceleration performance. especially,
The present invention relates to an economical driving display device suitable for automobiles equipped with diesel engines.

[Conventional technology]

Generally, the driving conditions of a car, such as the engine speed relative to the engine load, are selected based on the driver's will based on road conditions and other traffic conditions.
In particular, whether or not driving conditions are economical is determined by the driver based on his or her experience. Therefore, if the driver is a beginner or if the driver changes vehicles, it is usually difficult to drive economically.

Therefore, the inventor of the present invention has developed a system that allows the driver to easily and intuitively judge whether the current driving state of the vehicle is economical or not, by dividing the vehicle into an economical driving region and an uneconomical driving region. Utility Application No. 190045 (Sho 57-113233) to display an economic display device for people
In addition, a similar economical driving display device was published in Utility Application No. 56-24804 (Utility Patent Application No. 57-137744).
The application was filed by

[Problem that the invention attempts to solve]

As a result of using these display devices, the present inventor has
Furthermore, we noticed several points that should be improved and came up with the device of the present invention.

In other words, these display devices can appropriately display the operating status, but when installing these display devices on trucks, etc., the cost of the display device itself is relatively high, so it becomes even more costly. A low display device was needed.

The present invention concisely displays to the driver whether the driving conditions selected by the driver are economical in terms of fuel efficiency or acceleration performance, making it easy for the driver to see.
The purpose of the present invention is to provide an economical driving display device that has a simple structure and is more economical.

[Means for solving problems]

The present invention provides a light emitting diode for indicating uneconomical operation that emits light when the engine load factor or engine rotational speed exceeds a certain value, and a light emitting diode that emits light when the engine load factor or engine rotational speed does not exceed a certain value. An economical driving display device comprising a light-emitting diode for displaying economical driving that emits light when the exhaust brake The present invention is characterized by comprising a circuit that causes the economic driving display light emitting diode to emit light regardless of the engine load factor or engine rotational speed when the operating circuit is activated.

[Effect]

If the engine speed detected by the engine speed sensor exceeds a certain value, or if the engine load factor detected by a switch that detects the engine load factor exceeds a certain value and the exhaust brake does not operate, an uneconomical operation indication is displayed.

If the exhaust brake is activated even if the engine speed or engine load factor exceeds a certain value, an economical operation display will be displayed.

If the engine speed or engine load factor does not reach a certain value, an economical operation display will be displayed whether or not the exhaust brake is activated.

〔Example〕

A detailed explanation will be given below based on the drawings. The figure is a block diagram of an apparatus according to an embodiment of the present invention.

In the figure, numeral 1 is a rotation sensor that detects the rotation speed of the engine. The output of this rotation sensor 1 is given to a frequency-voltage converter 2, which converts the rotation speed into voltage. The output of this frequency-voltage converter 2 is given to a comparison input of a comparator 3. The other reference input of this comparator 3 is led to terminal 4. This terminal 4 is connected to the engine speed of 2200.
A reference voltage corresponding to times/minute is applied, and the comparator 3 sends out an output signal when the comparison input from the frequency-voltage converter 2 exceeds the reference voltage. The output of this comparator 3 is led to the input of an OR circuit 5.

Reference numeral 6 denotes a load switch, which is linked to a shaft 8 of an accelerator pedal 7 that controls the fuel supplied to the engine. This load switch 6 is always in the "off" state, and turns "on" when the accelerator pedal 7 is depressed to 70% or more in terms of engine load factor.
It is becoming a state. A power supply is connected to one end of the load switch 6, and the other end is led to another input of the OR circuit 5. The output of this OR circuit 5 is applied to an AND circuit 10.

Further, 11 is an accelerator switch, 12 is a clutch switch, and 13 is an exhaust brake switch. This accelerator switch 11 is always in an on state, and in conjunction with the shaft 8 of the accelerator pedal 7, it is turned off by only slightly depressing the accelerator pedal 7. Further, the clutch switch 12 is always on, and can be turned off by slightly pressing a clutch pedal (not shown). The exhaust brake switch 13 is provided in the driver's seat and is turned on by the driver's operation when the vehicle is driving on a long downhill road or in a city area where the brakes are frequently used.

The accelerator switch 11, clutch switch 12, and exhaust brake switch 13 are connected in series, one of the accelerator switches 11 is connected to a power source, and one of the exhaust brake switches 13 is connected to an exhaust brake operating circuit 14. A solenoid valve 15 for exhaust brake is connected.

Further, an input of an inverter 16 is connected to a connection point between the exhaust brake switch 13 and the exhaust brake operating circuit 14.

When the accelerator switch 11, clutch switch 12, and exhaust brake switch 13 are all in the on state, the exhaust brake operation circuit 14 closes the electromagnetic valve 15 to operate the exhaust brake, and at the same time, an exhaust brake operation detection signal is sent to the inverter 16. be done.

The output of this inverter 16 is given to the input of the AND circuit 10. Furthermore, AND circuit 10
The output of is connected to the base electrode of transistor 17. The emitter electrode of this transistor 17 is grounded via a light emitting diode 18 which emits red light to indicate uneconomical operation. Also transistor 1
The collector electrode of No. 7 is connected to a power supply via a resistor 19, and a transistor 21 is connected to this collector electrode.
The base electrode of is connected. This transistor 2
The emitter electrode 1 is grounded via a light emitting diode 22 for displaying economical driving, which emits green light. Further, the collector electrode of the transistor 21 is connected to a power supply via a resistor 23.

The light emitting diodes 18 and 22 are installed in the same position as other instruments in the driver's seat, so that the driver can easily see them while driving.

With such a configuration, the operation of the apparatus of this embodiment will be explained.

First, if the engine rotation speed detected by the rotation sensor 1 exceeds 2200 rpm or the engine load factor exceeds 70%, and the exhaust brake does not operate, the output of the OR circuit 5 and the inverter 16 Since the signal is at a high level, the output signal of the AND circuit 10 is at a high level. As a result, the light emitting diode 18 becomes conductive and emits red light, indicating that the operating state is uneconomical.

Next, when the engine speed exceeds 2200 rpm or when the engine load factor exceeds 70% and the exhaust brake is activated, the output signal of the OR circuit 5 becomes high level. Since the output signal of the inverter 16 becomes low level,
The output signal of the AND circuit 10 becomes low level.
This causes the light emitting diode 22 to conduct and emit green light, indicating that the operating state is economical.

In addition, if the engine rotation speed does not exceed 2200 rpm, the engine load factor does not exceed 70%, and the exhaust brake does not operate, the output signal of the OR circuit 5 will be at a low level. Since the output signal of the inverter 16 becomes high level,
The output signal of the AND circuit 10 becomes low level.
This causes the light emitting diode 22 to conduct and emit green light, indicating that the operating state is economical.

Furthermore, if the engine speed does not exceed 2200 rpm and the engine load factor does not exceed 70%, and the exhaust brake is activated,
Since the output signals of the OR circuit 5 and the inverter 16 are low level, the output signal of the AND circuit 10 is low level. This causes the light emitting diode 22 to conduct and emit green light, indicating that the operating state is economical.

In addition, in the above embodiment, the rotational speed of the engine is
An example is shown in which the output signal of the OR circuit 5 becomes high level when the engine speed exceeds 2200 times/min or when the engine load factor exceeds 70%, but these values can be determined according to the performance of the engine. .

Further, although an example has been shown in which the engine load factor is detected from the displacement of the accelerator pedal, it may also be detected from the load lever position or easy position of the injection pump of the diesel engine.

Furthermore, the colors emitted by the light emitting diodes 18 and 22 are not limited to red and green, but may be any other color as long as the two colors are different.

[Effect of idea]

As described above, according to the present invention, by displaying uneconomical operation only when the engine speed or load factor exceeds a certain value and the exhaust brake is not operating, (a) the structure is improved. An economical driving display device that is simple, (b) easy for drivers to distinguish, and (c) inexpensive can be obtained.

[Brief explanation of drawings]

The figure is a block diagram of an apparatus according to an embodiment of the present invention. 1... Rotation sensor, 2... Frequency voltage converter,
3... Comparator, 4... Terminal, 5... OR circuit, 6... Load switch, 7... Accelerator pedal, 8... Axis, 10... AND circuit, 11... Accelerator switch, 12... Clutch switch ,1
3... Exhaust brake switch, 14... Exhaust brake operating circuit, 15... Solenoid valve, 16... Inverter, 17... Transistor, 18... Light emitting diode, 19... Resistor, 21... Transistor, 22... Light emitting diode, 23...resistance.

Claims (1)

[Claims for Utility Model Registration] A light-emitting diode for indicating uneconomical operation that emits light when the engine load factor or engine rotation speed exceeds a certain value; and An economical driving display device comprising: a light-emitting diode for displaying economical driving that emits light when the vehicle does not exceed An economical driving display device comprising: a circuit that causes the economical driving display light emitting diode to emit light regardless of the engine load factor or engine rotational speed when the exhaust brake activation circuit is activated.