JPS6131144Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a heat exchange pipe installed in a pressurized air passage of a turbocharger and connected to a radiator, and a pump that circulates cooling water between the radiator and the heat exchange pipe. The present invention relates to a control device for an intercooler equipped with an intercooler.

A water-cooled intercooler increases engine output by cooling the air pressurized by the turbocharger and increasing the density of the supplied air. There was a problem that the engine output increased too much, reducing the durability of the engine.

This idea was devised to solve these conventional problems. It prevents the supply air from becoming more dense than necessary due to supercooling, and allows the engine to maintain an appropriate level of density without reducing engine durability. It is an object of the present invention to provide a control device capable of operating a water-cooled intercooler to increase output.

The water-cooled intercooler control device according to this invention detects the outside temperature using a temperature sensor, operates the pump only when the outside temperature is higher than a predetermined value, and stops cooling the supply air at low temperatures. It is something to do.

Next, a first embodiment of the intercooler control device according to this invention will be described based on the drawings.

In FIG. 1, the water-cooled intercooler 1 is
A heat exchange pipe 4 is provided in the pressurized air passage 3 of the turbocharger 2, and the heat exchange pipe 4 is connected to a radiator 6 by a circulation line 5. A pump 7 is provided in the circulation pipe 5 , and the pump 7 circulates cooling water between the heat exchange pipe 4 and the radiator 6 .

The pump 7 is driven by a motor 8, which uses a battery 9 as a power source and an ECU 10.
controlled by.

An air cleaner 13 and an air flow meter 14 are provided in an intake pipe 12 of the engine 11, and fuel is supplied to the engine 11 by so-called electronically controlled fuel injection. Air flow meter 1
The detection signal No. 4 is also input to the ECU 10, and the fuel injection amount is also controlled by the ECU 10.

A temperature sensor 15 is provided in the intake pipe 12, and a detection signal from the temperature sensor 15 is input to the ECU 10. Furthermore, an idle switch 17 is provided in the pressurized air passage 3 near the throttle valve 16, and when the throttle valve 16 reaches the idle opening position, the idle switch 17 is closed and a detection signal is input to the ECU 10. Ru.

The ECU 10 operates the pump 7 only when the temperature detected by the temperature sensor 15 is equal to or higher than a predetermined value, for example, 20 [° C.], and stops the pump 7 when the temperature is lower than the predetermined value. This prevents overload of the engine 11 and ensures the durability of the engine 11.

The ECU 10 also stops the pump 7 when the throttle valve 16 is at the idle opening.
During idle operation, the output of the generator decreases, and when the pump 7 is operated, there is a risk that the charging/discharging balance of the battery 9 may deteriorate. That is, by the ECU 10 stopping the pump 7 during idle operation, deterioration of the charging/discharging balance of the battery 9 is prevented.

In the second embodiment shown in FIG.
The following signals are used as operating conditions.

Signal S1: A signal representing that the outside temperature measured inside the intake pipe 12, outside the vehicle, etc. is higher than a predetermined value.

Signal S2: A signal representing that the temperature of the cooling water in the heat exchange pipe 4 is higher than a predetermined value, for example, 50 [°C].

Signal S3: A signal representing that the engine load is higher than a predetermined value. like this,
The signal is obtained by detecting the pressure in the pressurized air passage 3, the engine speed, etc.

Signal S4: A signal representing that the engine is being operated at relatively high speed. Therefore, this signal is not generated during idle operation.

Signal S5: The voltage of battery 9 is a predetermined value, e.g.
A signal representing 14 [V] or more.

The pump 7 is operated only when any one of the signals S1 to S3 and the signals S4 and S5 are present, thereby improving the durability of the engine 11 and the charging/discharging balance of the battery 9. ing.

As mentioned above, the water-cooled intercooler control device according to this invention detects the outside temperature using a temperature sensor, and operates the pump only when the outside temperature is higher than a predetermined value. , since cooling of the supply air is stopped at low temperatures, it is possible to prevent the supply air from becoming more dense than necessary due to supercooling that occurs when the outside temperature drops, and to increase engine output appropriately without reducing engine durability. It has an excellent effect of obtaining.

Note that this invention is not limited to the above embodiment, but can also be applied to an intercooler equipped with a fan that air-cools a radiator, and in this case, the ECU
Depending on the situation, it is preferable to operate the fan only when the pump is operating, and to stop the fan during high-speed operation when there is sufficient air flow.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the first embodiment of the water-cooled intercooler control device according to this invention;
The figure is a logic circuit diagram showing control conditions of the second embodiment. DESCRIPTION OF SYMBOLS 1... Water-cooled intercooler, 2... Turbocharger, 3... Pressurized air passage, 4... Heat exchange pipe, 5... Circulation pipe, 6... Radiator, 7...
...Pump, 8...Motor, 9...Battery, 10
... ECU, 11 ... Engine, 12 ... Intake pipe, 13 ... Air cleaner, 14 ... Air flow meter, 15 ... Temperature sensor, 16 ... Throttle valve, 17 ... Idle switch.

Claims (1)

[Scope of utility model registration request] A control device for a water-cooled intercooler equipped with a heat exchange pipe provided in a pressurized air passage of a turbocharger and connected to a radiator, and a pump for circulating cooling water between the radiator and the heat exchange pipe, characterized in that the control device further comprises a temperature sensor for detecting an outside air temperature, and a pump controller for operating the pump only when the outside air temperature is higher than a predetermined value based on a detection signal from the temperature sensor.