JPS631004Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine preheating device.

Conventionally, when using this type of preheating device manually, it was necessary to hold a key in the preheating position, and the preheating time varied depending on the operator.

Furthermore, in the case of an automatic type, it was necessary to attach a switch for preheating, and the key switch also required a preheating position.

The present invention was developed in view of the above circumstances, and its purpose is that when preheating is required, preheating can be started even if the key switch is turned to the starting position without the starter rotating. If you turn the key switch to the starting position and then release it without holding it (key switch 1 is connected to the input terminal)
Preheating can be performed automatically for a certain period of time (in the ACC position), and when preheating is not required, the starter can be rotated immediately by turning the key switch to the start position, and the starter can be rotated for a long time after preheating is completed. To provide an engine preheating device which can avoid turning off the starter by energizing the heating element of the bimetal timer, in which case the starter is turned off when the bimetal of the bimetal timer is restored.

Hereinafter, the present invention will be explained with reference to the drawings. In the drawing, 1 is a key switch, and the input terminal B of the key switch 1 is connected to the (+) terminal of a battery 2. The starting terminal C of the key switch 1 is connected to the first relay 3.
It is connected to the coil 4 of.

The input terminal ACC or battery relay terminal BR of the key switch 1 is connected to the contact 3a of the first relay 3 and the contact 9a of the bimetal 9 of the bimetal timer 8, respectively, and the other contact 9b of the bimetal 9 is connected to the coil of the second relay 5. 10 to one contact 11a of a temperature switch 11. The other contact 11b of the temperature switch 11 is grounded.
The other contact 3b of the first relay 3 is connected to the contact piece 5c of the second relay 5, and the other contact 5a of the second relay 5 is connected to the C terminal of the starter 12. One contact 5b of the second relay 5 is grounded via the heating element 13 of the bimetal timer 8 and the diode S'. One contact 6a of the third relay 6 is connected to the (+) terminal of the battery 2, and the other contact 6a is connected to the (+) terminal of the battery 2.
b is connected to a lamp 14 and an electric intake heater 15.

Contact 5b of second relay 5 is connected to coil 7 of third relay 6, and start terminal c of key switch 1 is connected to bimetal timer 8 through circuit 14'.
It is connected to the heating element 13 of. 15' is a circuit.

The temperature switch 11 senses the water temperature (or oil temperature) of the engine and shuts off the circuit when the temperature is above a certain temperature.

Next, the operation will be explained.

(1) Starting in cold weather When turning key switch 1 to start, first turn on the input terminal.
Since it passes through ACC, input terminal ACC (or battery relay terminal BR) is connected to battery 2.

At this time, heating element 1 of bimetal timer 8 is still
3 is cold, and the temperature switch 11 is also in a conductive state. Therefore, input terminal ACC → bimetal 9 of bimetal timer 8 → coil 10 of second relay 5
Electricity flows from → temperature switch 11 → earth, and the second relay 5 is energized and the contact piece 5c is connected to the contact point 5b. Therefore, even if the key switch 1 is connected to the starting terminal C and the first relay 3 is energized, the starter 1
2 is not energized, but the coil 7 of the third relay 6 is energized. For this reason, preheating begins and the lamp 14 is turned on.

At this time, if the key switch 1 is released, the position of the starting terminal C automatically returns to the position of the input terminal ACC, and the starting terminal C is cut off, but the contact 5b of the second relay 5
The first relay 3 is held by this circuit and preheating continues. At the same time, the heating element 13 of the bimetal timer 8 is also energized.

When a certain period of time has passed, the bimetal 9 of the bimetal timer 8 is cut off, the excitation of the second relay 5 is canceled, the contact piece 5c is connected to the contact 5a, and the third relay 6 is activated.
is de-energized, preheating is completed, and the light is turned off. At the same time, the first relay 3 is also de-energized.

At this point, turn key switch 1 again to start, and the 1st
Although the relay 3 is activated, the second relay 5 has its contact piece 5c connected to the contact point 5a, so the starter 1
Switch 2 is turned on and the engine starts.

After a while, when the heating element 13 cools down, the bimetal 9 is connected again, but this time the temperature switch 11 is cut off, so that no electricity flows anywhere during operation.

(2) Starting when warm When turning key switch 1 to start, first turn on the input terminal.
Electricity flows to ACC, but since temperature switch 11 is cut off, contact piece 5c of second relay 5 is connected to contact 5.
remains connected to a. Therefore, if electricity continues to flow through the starting terminal C, the starter 12 is switched on via the first relay 3.

Note that when the starter 12 is rotated for a long time after preheating is completed, the bimetal 9 of the bimetal timer 8
If it returns, the starter 12 will be turned off, but in this case, the heating element 1 of the bimetal timer 8
3 is energized, and the cut-off operation of the starter 12 is avoided.

The present invention has been described in detail above, and the contact 3a is energized by the rotation operation to the starting terminal C of the key switch 1 and is connected to the ACC terminal of the key switch 1.
a first relay 3 that connects to another contact 3b, a third relay 6 that is energized by rotating the key switch 1 to the starting terminal C, and an electric intake heater 15 that is activated by the energization of the third relay 6. , the heating element 13 is turned on by rotating the key switch 1 to the starting terminal C.
The bimetal timer 8 operates to turn off the bimetal 9 after a predetermined time, and the output contact of the first relay 3 is excited through the bimetal 9 of the bimetal timer 8 by turning the input terminal ACC of the key switch 1. The second relay 5 switches the contact piece 5c connected to the third relay 5 from one contact 5a to the other contact 5b connected to the coil 7 side of the third relay 6, and the output terminal of the coil 10 of the second relay 5. temperature switch 11 provided between the
, a starter 12 connected to one contact 5a of the second relay 5, a circuit 14' connecting the starting terminal C of the key switch 1 and the input side of the heating element 13 of the bimetal timer 8, and a circuit 14' connected to one contact 5a of the second relay 5. It is characterized in that it includes a diode 5' provided in a circuit 15' connecting the contact 5b and the input side of the heating element 13 of the bimetal timer 8.

Therefore, when preheating is required, preheating can be started without rotating the starter 12 even if the key switch 1 is turned to the starting position. Then release it (Key switch 1 is the input terminal.
Preheating can be performed automatically for a certain period of time (in the ACC position), and when preheating is not required, the stator 12 can be rotated as soon as the key switch 1 is turned to the starting position. Moreover, if the bimetal 9 of the bimetal timer 8 returns while the starter 12 is being rotated for a long time after preheating is completed, the starter 1
However, in this case, the heating element 13 of the bimetal timer 8 is energized and the starter 12 is prevented from being turned off.

[Brief explanation of drawings]

The drawing is an explanatory diagram of the configuration of an embodiment of the present invention. 1 is the key switch, 3 is the first relay, 5 is the second
Relay, 6 is the third relay, 8 is the bimetal timer, 12 is the starter.

Claims (1)

[Scope of utility model registration request] A first relay 3 that connects a contact 3a connected to the ACC terminal of the key switch 1 to another contact 3b, which is excited by the rotating operation to the starting terminal C of the key switch 1, and a rotating operation to the starting terminal C of the key switch 1. and an electric intake heater 15 that is activated by the excitation of the third relay 6.
, a bimetal timer 8 which operates the heating element 13 by rotating the key switch 1 to the starting terminal C and turning off the bimetal 9 after a predetermined time; and a bimetal timer 8 which operates the heating element 13 by rotating the key switch 1 to the input terminal C; The contact piece 5c which is excited through the bimetal 9 of 8 and connected to the output contact 3b of the first relay 3 is switched from one contact 5a to the other contact 5b connected to the coil 7 side of the third relay 6. The second relay 5 that moves and the coil 1 of the second relay 5
Temperature switch 11 provided between output terminal 0 and the ground side, and one contact 5a of second relay 5
a circuit 14' connecting the starting terminal C of the key switch 1 and the input side of the heating element 13 of the bimetal timer 8, and a second relay 5.
An engine preheating device comprising a diode 5' provided in a circuit 15' connecting the contact 5b of the bimetal timer 8 and the input side of the heating element 13 of the bimetal timer 8.