JPS6344179B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel consumption monitor that displays the quality of fuel consumption in an automobile or the like having a manual transmission.

More specifically, in automobiles etc. with manual transmissions, preset values are given to the vehicle speed, intake negative pressure, and engine speed to define a range of driving conditions with good fuel efficiency, so that the driver can Relating to a fuel consumption monitor that informs a driver of the quality of fuel efficiency by displaying by a simple means whether or not the fuel efficiency status of that gear falls within the above range when the gear is selected and the vehicle is driven. .

When driving a car equipped with a manual transmission, if the driver is not given information regarding the fuel efficiency of the car, the driver generally changes the gear position of the transmission as appropriate depending on the vehicle speed. It is difficult for the driver to drive at the optimal fuel efficiency, which minimizes fuel consumption, because the driver selects and operates the accelerator. From the perspective of increasing the economic efficiency of automobiles, it is desirable to drive with good fuel efficiency.
In order to achieve this, it is necessary to always inform the driver while driving whether or not the driving condition is at the optimum fuel efficiency. If information regarding the quality of fuel efficiency is provided, the driver will refer to such information and drive the vehicle in order to maintain good fuel efficiency.

In the past, several devices have been proposed as devices to guide drivers of automobiles and other vehicles to maintain good fuel efficiency while driving. There is still no device that satisfies all of the conditions, such as high reliability of device operation, and it is hoped that a fuel efficiency monitor that satisfies these conditions will emerge.

The present inventor has created the present invention in order to effectively solve the above-mentioned technical problem, and the object of the present invention is to provide a vehicle with a manual transmission, etc. Preset values are given for vehicle speed, engine suction negative pressure, and engine speed to determine a range of driving conditions with good fuel efficiency, and a display element is provided on the display panel in the driver's seat so that the driver can select a predetermined gear. To provide a fuel efficiency monitor that displays whether or not the fuel efficiency state of a gear position belongs to the above range when the vehicle is accelerated and runs by using the display element to inform a driver of whether the fuel efficiency is good or bad. It is in.

It is an object of the present invention to improve fuel efficiency by accurately informing the driver of the quality of fuel efficiency and guiding him in driving, and to realize such a configuration with an extremely simple circuit. Therefore, the object is to manufacture this at low cost and to have high reliability with few failures.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a circuit configuration of a fuel efficiency monitor according to the present invention, which is installed in an automobile or the like equipped with a manual transmission. In this embodiment, an automobile will be explained.

In Fig. 1, 1 is a vehicle speed detector that detects a set vehicle speed (v ₁ ), and this vehicle speed detector 1 outputs a high level signal (hereinafter referred to as V 1 ) when the vehicle speed of the automobile is higher than the set vehicle speed. When the vehicle speed is lower than the set vehicle speed, a low level signal (hereinafter referred to as "0") is output.
The output of vehicle speed detector 1 is output from AND circuit 2 and AND circuit 3.
are input respectively.

4 is a first suction negative pressure detector that detects a set suction negative pressure range (P _B1 P _B ), and this suction negative pressure detector 4 detects when the engine suction negative pressure falls within the set range. It is configured to output "1" and to output "0" when it is outside the set range. The output of the suction negative pressure detector 4 is input to the AND circuit 2 via the delay circuit 5. The function of the delay circuit 5 is that when a "0" signal is generated at the output of the suction negative pressure detector 4, this signal is delayed for a certain period of time (for example, 10 to 20 seconds) and sent to the AND circuit 2. It is to have them input.

6 is a first rotation speed detector that detects the set engine rotation speed Ne ₁ , and this rotation speed detector 6 outputs "1" when the engine rotation speed is below the set value; It is configured to output "0" when it is larger than the set value. Reference numeral 7 denotes a second rotation speed detector for detecting the set engine rotation speed _Ne2 , and this rotation speed detector 7 is also configured to function in the same manner as the rotation speed detector 6. . However, in this case, it is set so that Ne ₁ <Ne ₂ . Rotation speed detector 6, 7
The output of is determined by the switching operation of the changeover switch 8.
It is configured to be alternatively connected to one input of the AND circuit 2.

The changeover switch 8 is switched by the operation of the excitation coil 9. Reference numeral 10 denotes a second vehicle speed detector that detects a set vehicle speed _v2 , and this vehicle speed detector 10 energizes the excitation coil 9 when the vehicle speed exceeds the set vehicle speed. The excitation coil 9 is operated to de-energize when the current becomes small. Therefore, the movable contact 8a of the changeover switch 8
is connected to the terminal 8b by the energized coil 9 when the vehicle speed exceeds the set vehicle speed _v2 , and is deenergized and connected to the terminal 8c when the vehicle speed is lower than the set vehicle speed _v2 . Ru. In the above, the set vehicle speeds v ₁ and v ₂ are set in advance so that v ₁ <v ₂ .

11 is a second valve that detects the set suction negative pressure P _B2 .
This suction negative pressure detector 1
1 is configured to output "1" when the engine intake negative pressure is equal to or higher than the set value, and output "0" when it is smaller than the set value.
In this case, as described above, it is set so that P _B1 <P _B2 . The output of the suction negative pressure detector 11 is AND
It is input to circuit 3.

The outputs of the AND circuits 2 and 3 are input to an OR circuit 12, and the output of the OR circuit 12 is further connected to the base of a transistor 13. Battery terminal +
A lamp 14, which is a display element, and a transistor 13 are connected in series between B and ground via a collector and an emitter. The lamp 14 is a display element for indicating whether the fuel consumption is good or bad, and the transistor 13 is provided as a switch element. The lamp 14 is arranged in a part of a meter panel arranged near the driver's seat, for example, in a part such as a speedometer.

Next, the detectors 1, 4, 6, 7,
Each setting value of 10 and 11 v ₁ , P _B1 , Ne ₁ , Ne ₂ , v ₂ ,
An example of P _B2 will be given with reference to Figure 2 to clarify its meaning and explain its action.

FIG. 2 is a graph showing the relationship between vehicle speed v, suction negative pressure P _B , engine speed Ne, and each gear stage of the transmission, where the horizontal axis represents vehicle speed and the vertical axis represents fuel efficiency. The shaded area A in the figure indicates a region where fuel efficiency is good, and this region A has v≧10Km/h,
The range is determined by the conditions of mmHg≦P _B and Ne≦1900 rpm. In the figure, a, b, c, d, and e are graphs showing the relationship between vehicle speed and fuel efficiency for each gear stage, where a is the first gear, b is the second gear, c is the third gear,
d represents the graph of the fourth speed, and e represents the graph of the fifth speed.

In the above, when driving a car, when the driver selects each gear of the transmission, it is important to select each gear so that each gear falls within the above range A to improve fuel efficiency. It is desirable for this purpose. If the driver is informed of whether or not each selected gear belongs to region A, in other words, whether or not it satisfies driving conditions with good fuel efficiency, the driver can shift according to the instructions. It is thought that the device will be shifted.

Based on the above idea, the above-mentioned lamp 14
is configured to provide the driver with information regarding fuel efficiency. In other words, when the lamp 14 is on, it is assumed that the fuel efficiency is good, and when the lamp 14 is off, the driver is informed that the fuel efficiency is not good. In this way, the driver will be able to perform driving operations while looking at the display provided by the lamp 14.

Therefore, in the detectors 1, 4, and 6, v ₁ =
10Km/h, P _B1 = 140mmHg, P _B2 = 550mmHg, Ne ₁
=1900rpm, v≧10Km/h, 140mmHg≦
When the conditions of P _B , Ne≧1900 rpm are satisfied, the detectors 1, 4, and 6 output “1”, and as a result, the transistor 13 is turned on via the AND circuit 2 and the OR circuit 3, and the lamp 14 is turned on. Keep it lit.

The above-mentioned detectors 1, 4, and 6 mainly function during acceleration, and if the gear stage selected during acceleration does not belong to the above-mentioned area A and is inappropriate, one of the above-mentioned detectors becomes “0”, so
The output of the AND circuit 2 is set to "0" and the lamp 14 is turned off. The driver becomes aware of the poor fuel efficiency when the lamp 14 is turned off and performs a shift operation to the optimum gear position, so that each output of the detector becomes "1" again and the lamp 14 is turned on. In this way, it is possible to always follow the instructions from the lamp 14 and maintain good fuel efficiency.

The delay circuit 5 is provided to prevent the lamps 14 from being turned off one by one in some cases where the vehicle accelerates instantaneously during actual normal driving.

Detectors 7 and 10 are detectors for high-speed running, and are detectors used when the fifth gear is being used. In this case, if v ₂ =80 Km/h, for example, the vehicle speed detector 10 connects the movable contact 8a of the changeover switch 8 to the terminal 8b when the vehicle speed exceeds 80 Km/h. The rotation speed detector 7 is, for example,
Since Ne ₂ is set high at 2150rpm, detector 6
Even if the rotation speed increases compared to the case of lamp 1
You can give yourself some leeway before 4 disappears.

The second suction negative pressure detector 11 is for deceleration, and as is known, if P _B2 is given a value of 550 mmHg, for example, P _B = 550 mm during deceleration.
Hg is satisfied, so as long as the vehicle speed is 10km/h or more, the output of AND circuit 3 becomes "1" and OR circuit 1
2. The lamp 14 is kept lit via the transistor 13. This means that the circuit is configured to always treat the vehicle as having good fuel efficiency during deceleration.

It goes without saying that the circuit configuration and circuit elements of the above embodiment may be further modified without departing from the gist thereof.

In the above embodiment, the set value v ₁ of each detector,
Specific values have been given as an example for v ₂ , P _B1 , P _B2 , Ne ₁ , and Ne ₂ , but these values are based on a zone in which second gear does not open, which is a good fuel efficiency range, and where the engine speed is not increased too much. The position is set to be optimal, and is not particularly limited to this value. Moreover, such a value can be changed depending on the vehicle type.

As is clear from the above description, according to the present invention,
In particular, when accelerating or driving around town, the fuel efficiency is displayed by turning on or off lamps, etc., so the driver can obtain information on fuel efficiency based on the status of the lamps, etc. Since the driver always operates the transmission so that the display on the lamp or the like indicates good fuel efficiency, it is possible to improve fuel efficiency. Further, according to the present invention, it is possible to configure a fuel consumption monitor with an extremely simple configuration, and therefore, it is possible to manufacture a fuel consumption monitor at low cost, with few failures, and with high operational reliability. It exerts various effects and has enormous practical effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a circuit configuration diagram of a fuel consumption monitor, and FIG. 2 is a graph diagram showing a good fuel efficiency range used as reference in determining each setting value. In the drawing, 1 and 10 are vehicle speed detectors, 4 and 11 are suction negative pressure detectors, 6 and 7 are engine rotation speed detectors, and 14 is an indicator lamp.

Claims (1)

[Claims] 1. In a vehicle equipped with a manual transmission, there is a vehicle speed detector that detects vehicle speeds above a set speed, an intake negative pressure detector that detects a set negative pressure range, and A fuel efficiency monitor comprising: a rotation speed detector for detecting the engine speed; and a display element that displays good fuel efficiency when all of the above-mentioned detectors output detection signals satisfying the above-mentioned conditions.