JPH0742884Y2 - Vehicle window ice melting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an ice melting device for a vehicle window.

<Prior Art> The following is a conventional example of this type of ice melting device (see Japanese Patent Publication No. 61-33735).

That is, a heat generating resistor is attached to the windshield of a vehicle, and by energizing the heat generating resistor, ice such as frost and snow attached to the window glass is melted.

By the way, the heating resistor consumes a large amount of power (for example, 60V
1000W), so a large amount of power is generated by operating the generator so that the battery will not be consumed more than a predetermined amount.
The heating resistor is energized.

<Problems to be solved by the invention> However, in such a conventional ice melting device,
No consideration was given to impairing engine stability, vehicle drivability, operability, etc., as the load on the generator increased.

The present invention has been made in view of the above circumstances, and provides an ice melting device capable of sufficiently performing the ice melting process while maintaining good engine stability, vehicle running performance, operability, and the like. The purpose is to provide.

<Means for Solving the Problems> Therefore, as shown in FIG. 1, the device according to claim 1 has a heating element B attached to a vehicle window A and an energization for energizing the heating element B. Means C, a shift position detecting means D for detecting a shift position, a first energizing permission means E for permitting the operation of the energizing means C when the detected shift position becomes a neutral position, and When the shift position is in the neutral position and the energizing means C is operating, the engine rotation speed increasing means F for increasing the engine rotation speed by a predetermined amount in order to increase the power generation amount of the engine drive generator; An operating state detecting means G for detecting at least one of the engine rotation speed and the engine rotation speed increasing means when the detected shift position changes from the neutral position to the non-neutral position. F
And an engine speed increasing stop means H for stopping the operation of the engine, and when at least one of the vehicle speed and the engine speed is equal to or more than a predetermined value after the detected shift position is changed from the neutral position to the non-neutral position, The second energizing permission means I for permitting the operation of the energizing means C is included.

According to a second aspect of the invention, the second energization permission means I is
For a predetermined period after the detected shift position is changed from the neutral position to the non-neutral position, a means for permitting the operation of the energizing means C even if neither the vehicle speed nor the engine rotation speed is equal to or more than the predetermined value is provided. It is configured to include it.

<Operation> In the invention according to claim 1, when the shift position becomes the neutral position, the engine speed is increased to allow the heating element to be energized in a state where the power generation amount of the generator is increased. Therefore, secure engine stability and power supply. If the shift position is not in the neutral position, the increase in engine speed is temporarily stopped to increase the creep phenomenon in the automatic transmission (A / T) or the idle speed in the manual transmission (M / T). The increase in self-propelled speed will be suppressed and priority will be given to improving drivability and operability. If at least one of the vehicle speed and the engine speed becomes equal to or higher than a predetermined value after the shift position has changed to a position other than the neutral position, sufficient power generation can be ensured, so that energization of the heating element is permitted. To As a result, it becomes possible to sufficiently perform the ice melting process while maintaining good engine stability, vehicle running performance, operability, and the like.

Further, in the invention as set forth in claim 2, after the detected shift position changes from the neutral position to the non-neutral position, the increase of the engine rotation speed is stopped, and thereafter, the vehicle speed and the engine rotation speed are changed for a predetermined period. Even if none of them is equal to or more than a predetermined value, the operation of the energizing means is permitted. By this, in addition to the above-mentioned action, by continuing the energization within the permissible limit of battery discharge (because it is limited to a predetermined period), the ice-melting capability is further improved and frequent switching of the large power switch is possible. Suppress and improve the durability of high power switches. Further, by suppressing the frequent fluctuations of the rotation speed, it is possible to secure the engine stability, and to suppress the erroneous judgment in the energization permission judgment of the second energization permission means due to the rotation fluctuation.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In FIG. 2, an intake bypass passage 4 that bypasses the throttle valve 3 provided in the intake passage 2 of the engine 1 is formed, and an idle speed control valve 5 is provided in the intake bypass passage 4. The idle speed control valve 5
The opening and closing is controlled by the control device 6 which is a first energization permission means and a second energization permission means of the present invention, which includes a microcomputer or the like. The opening / closing operation of the idle speed control valve 5 functions as the engine speed increasing means and the engine speed increasing stop means of the present invention.

The control device 6 is provided with an on / off signal from a neutral switch 8 as a shift position detecting means which is attached to the transmission 7 and is turned on at the time of neutral, and a vehicle sensor 9 provided on the output side of the transmission 7. Vehicle speed signal and crank angle signal from crank angle sensor 10 (rotation speed signal)
And have been entered. Further, an on / off signal from a manual ice-melting operation switch 12 is input to the control device 6 via an energization control circuit 11.

On the other hand, a heating element (not shown) such as an electric resistor is attached to the window glass such as the windshield of the vehicle, and this heating element is connected to the energizing circuit 14. Electric power is supplied to the energizing circuit 14 from an alternator 15. The energizing circuit 14 is the energizing control circuit 11
The heating element is activated by the signal from the device.

Here, the vehicle speed sensor 9 and the crank angle sensor 10 form an operating state detecting means, and the energization control circuit 11 and the energizing circuit 14 form an energizing means.

Next, the operation will be described with reference to the flowchart of FIG.
This routine is started when the driver turns on the ice-melting operation switch 12 after starting the engine.

At S1, various detection signals from the neutral switch 8, the vehicle speed sensor 9 and the like are read.

In S2, it is determined based on the ON / OFF signal from the neutral switch 8 whether or not the current shift position of the transmission 7 is the neutral position. If YES, the process proceeds to S3, and if NO, the process proceeds to S8.

In S3, an energization permission signal is output to the energization control circuit 11 and the built-in timer starts counting. Energization control circuit
When the energization permission signal is input and the outside air temperature (or the vehicle interior temperature) is a predetermined value or less, 11 turns on the energizing circuit 14 to start energizing the heating element attached to the window glass 13. As a result, the heating element generates heat and starts melting of ice such as frost and snow attached to the window glass 13.

In S4, the intake air flow rate is increased by controlling the idle speed control valve 5 to increase the idle rotation speed by a predetermined rotation speed above the normal speed. As a result, it is possible to sufficiently secure the power generation amount of the alternator 15, that is, the power consumption of the heating element. In addition, the engine rotation is stabilized.

In S5, it is further determined whether or not the shift position of the transmission 7 is the neutral position. If YES, the process proceeds to S6, and if NO, the process proceeds to S10.

In S6, the energization permission signal to the energization control circuit 11 is continued,
Continue melting ice operation.

In S7, it is determined whether or not the count value of the timer is equal to or greater than a predetermined value. If YES, the process proceeds to S8, and if NO, returns to S5.

In S8, the energization prohibition signal is output to the energization control circuit 11. As a result, the energization control circuit 11 turns off the energization circuit 14 to stop energization of the heating element and stop the ice melting operation.

In S9, the idle speed control valve 5 is controlled to reduce the intake air flow rate and reduce the idle rotation speed to the normal idle rotation speed.

On the other hand, even if the count value of the timer is less than the predetermined value, if the shift position is other than the neutral position, the process proceeds to S10 to increase the creep phenomenon in the automatic transmission (A / T) and the manual transmission (M / T). The idle speed control valve 5 is controlled to reduce the idle rotation speed to the normal idle rotation speed in order to suppress the increase of the idle self-propelled speed and prioritize the improvement of drivability and operability, and then the process proceeds to S11.

In S11, the detected vehicle speed V is equal to or higher than the predetermined vehicle speed V _set and the detected engine rotation speed N is the predetermined rotation speed within a set time T (for example, 5 seconds) from the time when the neutral position is switched to the non-neutral position. It is determined whether or not N _set or more. If YES, the process proceeds to S12, and if NO, the process proceeds to S14.

In S12, the energization permission signal to the energization control circuit 11 is continued to continue the ice melting operation.

In S13, as in S7, it is determined whether or not the count value of the timer is equal to or more than a predetermined value, and if YES, the process proceeds to S14.
If NO, proceed to S15.

In S14, the energization prohibition signal is output to the energization control circuit 11.
As a result, the energization control circuit 11 turns off the energization circuit 14 to stop energization of the heating element and stop the ice melting operation.

On the other hand, in S15, it is determined whether the detected vehicle speed V is less than the predetermined vehicle speed V _set or the detected engine rotation speed N is less than the predetermined rotation speed N _set when the set time T or more. , If YES, go to S16 If NO, S12
Return to.

In S16, it is determined whether or not the shift position has become the neutral position. If YES, the process proceeds to S17, and if NO, S14.
Proceed to and stop the operation of ice melting.

In S17, similarly to S4, the idle rotation speed is increased by a predetermined rotation speed above the normal speed, and then the flow proceeds to S6 to continue the ice melting operation.

In this way, when the shift position is continuously in the neutral position, the ice melting operation is continued until the count value of the timer reaches a predetermined value.

Further, even if the count value of the timer is less than the predetermined value, the vehicle speed is equal to or higher than the predetermined vehicle speed and the engine rotation speed is equal to or higher than the predetermined rotation speed within the set time T after traveling from the neutral position to the non-neutral position. When, the ice melting operation is continued until the count value of the timer reaches a predetermined value. At this time, the engine rotation speed is sufficiently high and the power consumption of the heat generating element can be sufficiently secured by the power generation amount of the alternator 15 without increasing the engine rotation speed.

Further, when the count value of the timer is less than the predetermined value and the vehicle speed and the engine rotation speed are less than the predetermined values and the shift position becomes the neutral position, the ice melting operation causes the count value of the timer to become the predetermined value. Will continue until.

As a result, the ice adhering to the window glass 13 can be sufficiently melted and removed, and the visibility etc. can be improved. Further, when the vehicle speed and the engine rotation speed become less than the predetermined values during the ice-melting operation during traveling, the ice-melting operation is stopped, so that the load of the alternator is reduced and the engine stall can be prevented.

<Effect of the Invention> According to the invention described in claim 1, it is possible to sufficiently perform the ice-melting treatment while maintaining good engine stability, vehicle running performance, operability, and the like.

According to the second aspect of the invention, compared to the first aspect of the invention, it is possible to increase the energization opportunity within the allowable limit of battery discharge, so that it is possible to further improve the ice-melting processing capacity. At the same time, frequent switching of the high power switch can be suppressed, so that the durability of the high power switch can be improved. Further, since it is possible to suppress frequent fluctuations in the idle rotation speed, it is possible to ensure engine stability, and also suppress the occurrence of erroneous judgments in the energization permission judgment of the second energization permission means due to rotation fluctuations. You can

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the present invention, and FIG. 3 is a flowchart of the same. 6 ... Control device, 8 ... Neutral switch, 9 ...
Vehicle speed sensor, 10 ... crank angle sensor, 11 ... energization control circuit, 13 ... window glass, 14 ... energization circuit, 15 ...
... alternator

Claims (2)

[Scope of utility model registration request] 1. A heating element attached to a vehicle window, an energizing means for energizing the heating element, a shift position detecting means for detecting a shift position, and a shift position when the detected shift position becomes a neutral position. A first energization permitting means for permitting operation of the energizing means, and an engine for increasing the power generation amount of the engine-driven generator when the detected shift position is the neutral position and the energizing means is in operation. When the engine rotation speed increasing means for increasing the rotation speed by a predetermined amount, the operating state detecting means for detecting at least one of the vehicle speed and the engine rotation speed, and the detected shift position from the neutral position to the non-neutral position The engine rotation speed increase stopping means for stopping the operation of the engine rotation speed increasing means, and the detected shift position are not shifted from the neutral position. After the neutral position, when at least one of the vehicle speed and the engine rotation speed is equal to or higher than a predetermined value, a second energization permission unit that authorizes the operation of the energization unit is included. Ice melting device for vehicle windows. 2. The vehicle speed and the engine rotation speed are both above the predetermined value for a predetermined period after the detected shift position is changed from the neutral position to the non-neutral position by the second energization permission means. The ice melting device for a vehicle window according to claim 1, further comprising means for permitting operation of the energizing means.