JPH0745807B2 - Vehicle rotating machine cooling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for cooling a rotating machine arranged in an engine room.

<< Background of the Invention >> Japanese Patent Application Laid-Open No. 61-103255 is known as a cooling device.

By the way, in a vehicle, a rotating machine such as a starter motor that is arranged in the engine room and handles a large current has a large amount of heat generation. It is desired to prevent burnout.

Therefore, conventionally, a proposal has been made in which a pipe is wound around a housing of such a rotary machine and cooling water is flowed in the pipe.

However, in the proposed device of that type, there is a problem that a pipe for flowing cooling water is required, which leads to an increase in size of the device, and leakage water treatment is required, which increases the manufacturing cost of the device.

For this reason, there has been proposed a device in which a fan is attached to the rotary shaft of such a rotary machine and the cooling air for the rotary machine is obtained by the fan.

However, in the proposed device, there is a problem that the efficiency of the rotating machine is lowered due to the fan loss, and the rotating machine becomes large due to the increase of the shaft output.

<< Object of the Invention >> The present invention has been made in view of the above problems, and an object thereof is to sufficiently perform forced air cooling of the rotating machine arranged in the engine room without lowering efficiency and increasing the size thereof. An object of the present invention is to provide a cooling device that can perform cooling.

<< Summary of the Invention >> To achieve the above object, the present invention provides a rotating machine and an engine arranged in an engine room, an intake air passage for guiding intake air passing through an air cleaner to an intake side of the engine, and the intake air. A rotary machine cooling pipe that introduces a part of the air into the rotary machine and discharges it to the intake side of the engine, a valve provided in the rotary machine cooling pipe, and a state detector that detects the state of the rotary machine. And a valve controller that controls the valve according to a detection state of the state detector to stop a portion of the intake air from being introduced into the rotary machine. .

<< Embodiment of the Invention >> Hereinafter, a preferred embodiment of an apparatus according to the present invention will be described with reference to the drawings.

In FIG. 1, fuel is injected from an injector (not shown) in the engine 10, and the fuel injection is electronically controlled.

Then, in the intake process of the engine 10, the piston 12 is driven downward, the intake valve 14 is opened, the atmosphere is purified by the air cleaner 16, and the atmosphere is sucked into the cylinder 18 through the intake air passage.

The intake air amount is adjusted by the throttle valve 20 and detected by the air flow meter 22.

Further, the amount of fuel corresponding to the detected amount of engine intake air is injected into the cylinder 18, which causes the throttle valve
The output of the engine 10 is adjusted according to the opening degree of 20.

The engine 10 described above is driven by the starter 24 at the time of starting the engine, and the DC drive 26 of the starter 24 provides the engine driving force.

The DC motor 26 is composed of a stator 28, a rotor 30, a commutator 32, and a brush 34, and a rotor is provided inside the yoke 36.
A magnet 38 is provided so as to face 30.

The brush 34 is held by the brush holder 40.

The engine driving force obtained by the above DC motor 26 is applied to a pinion 44 provided on the shaft 42 via a planetary gear type speed reducer 46.

At that time, the pinion 44 is moved by the electromagnetic clutch 47 via the moving cylinder 48 and meshed with a rig gear (not shown), and the engine crankshaft is driven via this.

Here, in order to protect the sitata 24 from heating by continuous cranking for a long time, its forced air cooling is performed as follows.

On the side surface of the DC motor 26, an inlet 50 for cooling air is provided in the vicinity of the brush 34 at right angles to the brush 34, and on the side surface thereof, an exhaust port 52 is provided on the opposite side of the brush 34.

The exhaust port 52 is communicated with the intake side of the engine 10 through a pipe 54, and therefore the device of this embodiment is
At the start of 10, the intake air is fed to the starter 24 of the DC motor 26
Can be introduced within.

Further, one end of a pipe 52 is connected to the inlet 50 of the DC motor 26, and the other end is connected to a downstream side of the air flow meter 22 and an upstream side of the throttle valve 20.

Therefore, when the engine is started with the throttle valve 20 closed, the air cleaner 16 introduces clean air into the DC motor 26 by bypassing the throttle valve 20.

Furthermore, a valve body 58 for opening and closing the exhaust port of the pipe 54 through which engine intake air that has cooled the DC motor 26 flows is provided, and the valve body 58 is driven by an actuator 60.

The actuator 60 is controlled by a control circuit 61, and the control circuit 61 is turned on when the engine 10 is started by a key operation.
The start switch 64 is connected.

An on-vehicle battery 68 is connected to the control circuit 61.

FIG. 2 shows the circuit configuration of the control circuit 61, and the start switch 64 is connected in series to the coil 60a of the actuator 60.

Therefore, when the engine is started (the start switch 64 is ON), the coil 60a of the actuator 60 is energized by the vehicle-mounted battery 68 via the start switch 64.

As a result, the valve body 60 opens the exhaust port of the pipe 54, and the engine intake air for cooling is introduced into the DC motor 26.

In addition, the start switch 64 for starting the engine 10
When turned on, the coils 76a and 76b of the magnet switch 76 are energized to short-circuit the contacts 76c and 76d, and a drive current is supplied from the vehicle battery 68 to the DC motor 26 of the starter 24 via them.

In this embodiment, when the engine 10 is started, the starter 24
(That is, the outlet of the pipe 54 is opened when the direct-current motor 26 used as its drive source) is on.

At that time, the throttle valve 20 is closed, so that the DC motor 26 is cooled by the engine intake air.

Next, a second embodiment will be described with reference to FIGS. 3, 4 and 5. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 3, the actuator 60 is controlled by a control circuit 62, and the control circuit 62 is operated by a key operation of the engine.
A start switch 64 that is turned on when starting 10 is connected.

Further, the control circuit 62 includes a thermocouple 66 and an in-vehicle battery 68.
Is connected, and the detection tip of the thermocouple 66 is the DC motor 26.
Embedded in the magnetic pole 38.

The circuit configuration of the control circuit 62 is shown in FIG. 4, and the detection voltage of the thermocouple 66 is supplied to the comparator 72 via the amplifier 70.

The comparator 72 has a reference voltage V ₀ corresponding to the set temperature.
Is given, and the ON drive signal for the power transistor 74 is obtained by the comparator 72 when the magnetic pole 38 exceeds the set temperature and the temperature inside the DC motor 26 rises.

The coil 60a of the actuator 60 and the start switch 64 are connected in series to the power transistor 74, and therefore when the engine is started (start switch 64 is ON).
When the magnetic pole 38 is at or above the set temperature (the power transistor 74 is ON), the coil 60a of the actuator 60 is energized by the vehicle-mounted battery 68 via the start switch 64 and the power transistor 74.

As a result, the valve body 60 opens the exhaust port of the pipe 54, and the engine intake air for cooling is introduced into the DC motor 26.

In addition, the start switch 64 for starting the engine 10
When turned on, the coils 76a and 76b of the magnet switch 76 are energized, the contacts 76c and 76d are short-circuited, and a drive current is supplied from the vehicle-mounted battery 68 to the DC motor 26 of the starter 24 via them.

As can be understood from the operation explanatory view of FIG. 5, in the present embodiment, when the temperature of the inside of the starter 24 (that is, the DC motor 26 used as the drive source thereof) is rising at the time of starting the engine 10, the pipe is 54 exhaust port is opened.

At that time, the throttle valve 20 is closed, so that the DC motor 26 is cooled by the engine intake air.

Therefore, according to the present embodiment, even if continuous cranking is performed for a long time, it is possible to effectively protect the DC motor 26 from heating depending on the temperature.

Further, particularly according to the present embodiment, when the temperature of the DC motor 26 does not rise and cooling thereof is unnecessary, the pipe 54 is connected to the pipe 54 by the valve body 58.
The exhaust port of the DC motor is closed, which causes a large amount of air to flow into the DC motor.
It is not sucked into the engine 10 from the 26 side.

As a result, the stability of the engine 10 is maintained during the initial explosion and the complete explosion when starting the engine.

Next, a third embodiment will be described with reference to FIGS. 6, 7, and 8. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 6, the actuator 60 is controlled by the control circuit 63, and the control circuit 63 is operated by a key operation of the engine.
The start switch 64 that is turned on at the time of starting 10 and the terminal voltage of the electromagnetic clutch 47 are connected.

An on-vehicle battery 68 is connected to the control circuit 63, and the drive time of the DC motor 26 is detected from the terminal voltage of the electromagnetic clutch 47.

A circuit configuration of the control circuit 63 is shown in FIG. 7, and a timer 73 for continuing the drive time of the DC motor 26 when the start switch 64 is turned on is provided.

A reference drive time is set in the timer 73, and when the drive time exceeds the set time and the inside of the DC motor 26 is driven, an ON drive signal for the power transistor 74 is obtained.

The power transistor 74 is connected in series with the coil 60a of the actuator 60 and the sit switch 64, and therefore when the engine is started (the start switch 64 is ON).
When the driving time exceeds the set value (the power transistor 74 is ON), the coil 60a of the actuator 60 is energized by the on-vehicle battery 68 via the sit switch 64 and the power transistor 74.

As a result, the valve body 60 opens the exhaust port of the pipe 54, and the engine intake air for cooling is introduced into the DC motor 26.

In addition, the start switch 64 for starting the engine 10
When turned on, the coils 76a and 76b of the magnet switch 76 are energized to short-circuit the contacts 76c and 76d, and a drive current is supplied from the vehicle battery 68 to the DC motor 26 of the starter 24 via them.

As can be understood from the operation explanatory view of FIG. 8, in the present embodiment, when the drive time of the starter 24 (that is, the DC motor 26 used as its drive source) at the time of starting the engine 10 becomes long, the pipe 54 The outlet is opened.

At that time, the throttle valve 20 is closed, so that the DC motor 26 is cooled by the engine intake air.

Therefore, according to the present embodiment, it becomes possible to effectively protect the DC motor 26 from heating even if continuous cranking is performed for a long time.

According to the above three embodiments, the engine intake air is blown to the brush 34 having the highest temperature.
It is possible to effectively and sufficiently cool the inside without lowering the efficiency and increasing the size.

Further, the engine intake air is cleaned by the air cleaner 16, so that no foreign matter is sucked into the DC motor 26 and its operation is not hindered.

Furthermore, since the engine intake air is cleaned by the air cleaner 16, foreign matter does not enter the DC motor 26 and its operation is not hindered.

If the DC motor 26 is cooled during continuous cranking, the intake air temperature of the engine 10 rises, which facilitates starting the engine.

<< Effects of the Invention >> As described above, according to the present invention, since the inside of the rotating machine in the engine room is forcibly air-cooled by the introduction of the engine intake air, the efficiency of the rotating machine is reduced and the rotating machine is increased in size. It becomes possible to sufficiently and effectively cool the rotating machine without adversely affecting the engine operation.

Further, since the engine intake air is cleaned by the air cleaner, foreign matter does not enter the DC motor and its operation is not hindered.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a preferred first embodiment of the apparatus according to the present invention, FIG. 2 is an explanatory configuration diagram of the control circuit in FIG. 1, and FIG. 3 is an overall configuration diagram of the second embodiment. , Fig. 4 is the third
FIG. 5 is an explanatory diagram of the configuration of the control circuit in the figure, FIG. 5 is an explanatory diagram of the operation of the second embodiment, and FIG. 6 is an overall configuration diagram of the third embodiment.
FIG. 7 is a structural explanatory view of the control circuit in FIG. 6, and FIG. 8 is an operational explanatory view of the third embodiment. 10 …… Engine 16 …… Air cleaner 20 …… Throttle valve 22 …… Air flow meter 24 …… Starter 26 …… DC motor 50 …… Inlet 52… Exhaust 54,56 …… Pipe 58 …… Valve 60… Actuator 61, 62, 63 Control circuit 64 Start switch 66 Thermocouple 68 Car battery 73 Timer 76 Mignet switch

Claims (1)

[Claims] 1. A rotational speed and an engine arranged in an engine room, an intake air passage for guiding intake air passing through an air cleaner to an intake side of the engine, and a part of the intake air inside the rotary machine. A rotary machine cooling pipe that is introduced and discharged to the intake side of the engine, a valve provided in the rotary machine cooling pipe, a state detector that detects the state of the rotary machine, and a detection state of the state detector. And a valve controller that controls the valve to stop a part of the intake air from being introduced into the inside of the rotating machine, and a cooling device for a rotating machine for a vehicle.