JPH0986353A - Timer control device for on-vehicle rear window defogger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arbitrarily set a required time on the part of an operator at the time of energizing a rear window defogger for the required time with a switch operated. SOLUTION: While a defogger is being driven (energized), if a defogger switch is turned on within a required time T1 , energizing is suspended, a time T2 having been energized so far is renewed to the required time, and subsequently, electricity is turned on only for the period of the time T2 . On the other hand, after the period of the required time T1 has elapsed, within a certain time t, for example, five minutes, if the defogger switch is turned on, electricity is turned on for the period of the time T1 , concurrently, the required time T is renewed to T1 +α (for example, α is three minutes) = T3 and subsequently, electricity is turned on for the period of the time T3 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defogger for melting dew condensation, frost, and frost on a rear windshield of a vehicle, and more particularly to a device for controlling a power supply time to the defogger.

[0002]

2. Description of the Related Art If the rear windshield of a vehicle is fogged due to dew, frost, or ice, the visibility to the rear may be poor, or it may not be visible at all, which may hinder driving. For this reason, the vehicle is provided with a defogger that extends a resistance wire around the rear windshield glass, supplies power to the resistance wire, and defrosts due to its heat generation, as means for eliminating the fogging. .

Power is supplied to the defogger when the switch is pressed to turn it on, and a method of pressing the switch again to turn off the power and a method of supplying power to the defogger for a certain period of time by turning the switch on. is there.

The former method does not stop the power supply to the defogger unless the driver turns the switch off (turns it off). Supply may impair the function of other equipment. It is easy to forget that the defogger is driving (power is being supplied) because the driving is not hindered if the visibility is improved.

On the other hand, the latter method does not have the above-mentioned inconvenience because the power supply is forcibly stopped within a required timer time.

[0006]

As described above, the latter timer type is superior to the former one, but the required timer time for supplying power to the defogger is ( Maker) is set and constant,
Arbitrary setting by the driver was impossible.

Therefore, when the cloudiness is resolved within the required time and the timer (power supply) is desired to be canceled,
I had to press the switch again to turn it off. On the other hand, if the fog does not disappear within the required time, the switch has to be pressed again to drive the defogger. The defogger is driven many times during one run,
Each time, the above operation must be performed, and the same operation as the former method, or more operation (more than required time, operation of re-switch if power is to be supplied, etc.) is required,
It was annoying. In this case, the advantage of the latter cannot be utilized.

An object of the present invention is to solve the above problems of the timer system.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 turns on a defogger switch to supply a power to the defogger for a required time, and a timer control of a rear window defogger on a vehicle. In the device, the driver can arbitrarily set the required time.

A second aspect of the present invention is an aspect of the setting means of the first aspect of the invention, wherein the defogger switch is turned on again within the time required after the defogger switch is turned on. Stops the power supply to the defogger, resets the time from the first turning on of the defogger switch to the time when the defogger switch is turned on again, and after the lapse of the required time, within a fixed time. When the defogger switch is turned on, power is supplied to the defogger, and the required time is extended by a unit time and reset so that the driver can set the required time.

According to a third aspect of the invention, in the second aspect of the invention, the set time is stored in an EEPROM.

[0012]

According to the invention thus constructed, the optimum power supply time (timer time) of the defogger during one running.
By setting the time to, the defogger can be efficiently driven.

[0013]

1 to 3 show an embodiment, in which a signal from a rear window defogger switch 2 is input to a controller 1 and a signal is output to a rear window defogger relay 3. This controller 1 performs the following operations.

That is, when the one-push type defogger switch 2 is pressed and an ON signal is input, the defogger relay 3 is driven (indicated by a chain line in FIG. 1) to supply power (energize) to the rear window defogger R. . The energization time (required timer time) T _{1 is set} to, for example, 15 minutes, and the energization is performed based on the memory of the RAM of the IC in the controller 1 as shown in FIG. This energizing operation (a) is
It is a normal one, and in the flowchart of FIG.
(1) → (2) → (3) → (4) → (5) → (6) → (7) → (13) → (1
4) → (15) → (16) → (17) → (19).

When the defogger switch 2 is turned on during this energizing operation (within the required time T ₁ ), driving of the defogger relay 3 is stopped (solid line state in FIG. 1), and energization to the defogger R is stopped. At the same time, the time T ₂ from the time when the switch 2 is first pushed to the time when the switch 2 is turned on again is set to RA in the IC of the controller 1.
Remember it in M. After that, if the defogger switch 2 is turned on, only the required time T ₂ stored immediately before the defogger switch 2 is turned on as shown in FIG.
The defogger R is energized as in the operation (b). This energizing operation (b) is as follows (1) → (2) → (20) →
(10) → (11) → (12) → (21) → (13) → (17) → (19) → normal operation (a).

Next, after the preset required time T _{2 has} elapsed, the defogger switch 2 is turned on within a fixed time t, for example, 5 minutes.
When There is turned on, with the energization of the required time T ₂ to the defogger R by driving the Deformation Tsu Galilei 3, the required time T _2, it is determined that no sufficient defrosting, T ₂ + alpha
= The required time T _3, and stores the T ₃ to RAM.
The α is an extension unit time, and may be appropriately selected as 1 minute, 2 minutes ..., For example, 3 minutes.

Thereafter, if the defogger switch 2 is turned on within the time T ₂ , the driving of the defogger relay 3 is stopped and the energization of the defogger R is stopped, but the operation (b) is not shortened. . On the other hand, if the defogger switch 2 is turned on within the fixed time t, the above operation is performed and T ₃ + α is set and stored. In addition, a fixed time t
After the lapse of time, if the defogger switch is turned on, the defogger R is energized for the required time T ₃ stored immediately before that, as shown in FIG. This energizing operation (c) is shown in Fig. 3 as (1) → (2) → (3) → (4) → (5) → (6) → (7) →
(8) → (9) → (13) → (17) → (19) → normal operation (a).

In the case of the RAM, the IC must be supplied with electric power at all times, and the dark current increases, so that the EEPROM 4 can be replaced as shown in FIG. Further, the controller 1 may be separately provided for controlling the defogger R, but may also be used as a controller of the air conditioner unit. Further, the rear window defogger switch 2 is provided with an indicator lamp 5 so that the lamp 5 can indicate that the defogger R is in operation.

[0019]

As described above, according to the present invention, the driver can arbitrarily set the timer time (defogger driving time) by using the existing one without adding a special switch or the like. It is possible and very convenient.

[Brief description of drawings]

FIG. 1 is a circuit diagram of one embodiment.

FIG. 2 is an operation timing chart of the same embodiment.

FIG. 3 is a flowchart of the same embodiment.

[Explanation of symbols]

1 Controller 2 Rear window defogger switch 3 Rear window defog relay 4 EEPROM 5 Indicator lamp R Rear window defogger T, T ₁ , T ₂ , T ₃ Required time t Constant time

Continued Front Page (72) Inventor Yuji Maeda 1-7-10 Kikuzumi, Minami-ku, Aichi Prefecture Haruna Research Institute Ltd. (72) Inventor Yuichi Ito 1-7, Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture No. 10 Harness Research Institute Co., Ltd. (72) Inventor Sakamoto 1-7-10 Kikuzumi, Minami-ku, Aichi Prefecture Nagoya City Harness Research Institute Co., Ltd.

Claims (3)

[Claims] 1. A rear window defogger timer control device on a vehicle for supplying power to a defogger R for a required time T by turning on the defogger switch 2, wherein the required time T is set by a driver. A rear window defogger timer control device on a vehicle, which is characterized in that 2. The rear window defogger timer control device for a vehicle according to claim 1, wherein when the defogger switch 2 is turned on again within the required time T after the defogger switch 2 is turned on, The power supply to the defogger R is stopped, and the time T ₂ from when the defogger switch 2 is first turned on to when the defogger switch 2 is turned on is reset to the required time T. When the defogger switch 2 is turned on within the time t, the driver sets the required time T by supplying power to the defogger R and extending the required time T by a unit time α to reset it. A rear wind defogger timer control device on a vehicle, which is characterized by being obtained. 3. The timer control device for a rear window defogger on a vehicle according to claim 2, wherein the required time T is stored in the EEPROM 4.