JP2778187B2 - Starter device with air pump - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a starter device with an air pump.

2. Description of the Related Art Conventionally, an internal combustion engine for a vehicle is provided with an air pump for purifying the inside of the internal combustion engine by purifying air as needed to an exhaust pipe for exhaust gas purification.

Also, conventionally, it has been proposed to drive various auxiliary machines by a starter.

Further, Japanese Utility Model Laid-Open No. 59-32174 discloses a starter of a compressed air drive type in which an air turbine is provided on a crankshaft of an engine and an air motor is used at the time of starting the engine using compressed air from a compressed air tank. ing.

[Problems to be Solved by the Invention] However, since the starter is designed with an extremely short-time rating of, for example, several tens of seconds, it has poor cooling performance and requires a long-time operation like a normal accessory drive. Even if the load current is small, the temperature gradually rises due to the accumulation of heat, and the heat resistance of the insulating resin deteriorates. Of course, if the starter is modified so that it can be operated for a long time, the situation will be solved, but it will be difficult to commercialize it economically or in terms of space. Further, it is possible to always limit the load current of the auxiliary equipment to a certain value or less so as not to exceed the allowable temperature range. However, in this case, the application is limited, and for example, an air pump for purifying exhaust gas is used. Driving becomes difficult.

In addition, the air turbine type starter disclosed in the above publication has a disadvantage that the device configuration becomes large.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a starter device with an air pump that does not cause deterioration of the life of the starter portion or increase in size.

[Means for Solving the Problems] A starter device with an air pump according to the present invention includes: an air pump unit for feeding an air flow for purifying exhaust gas to an exhaust pipe of an internal combustion engine for a vehicle; and an internal combustion engine and an air pump unit for the vehicle. A starter device provided with a starter unit for driving, wherein the air pump unit supplies the airflow to the exhaust pipe through a passage in the starter unit, thereby starting the internal combustion engine for the vehicle and the exhaust pipe. The starter unit is cooled when the air is supplied to the starter.

[Operation] In the starter device with the air pump of the present invention, the air pump section driven by the starter section generates an airflow, and the airflow first cools the starter section, and then is sent to the exhaust pipe to be exhausted. To purify.

[Embodiment] An embodiment of a starter device with an air pump according to the present invention will be described with reference to FIGS. 1 and 2. FIG.

This device is used in an internal combustion engine for a vehicle, and includes a starter unit 7 including a normal starter, and an air flow driven by the starter unit 7 (indicated by an arrow in the drawing).
From the air pump unit 1 that generates

The air pump unit 1 is of a centrifugal type, and its casing 10
A rotor 12 is rotatably housed in the rotor 12, and a centrifugal wing 11 is formed at the tip of the rotor 12. The casing 10 has an intake port 10a on an end wall on the starter section 7 side, and has a discharge pipe 13 on an opposite end wall, and the discharge pipe 13 is connected via a pipe 14 to an exhaust pipe of an internal combustion engine for a vehicle. (Not shown).

The outer peripheral wall of the casing 10 further extends from the end wall on the starter side to the starter 7 side, and is connected to the yoke 6 of the starter 7.

The shaft 16 of the starter unit 7 is directly connected to the shaft of the air pump unit 1. The starter section 7 has an armature inside the yoke 70
The commutator 72 and the brush 73 are provided in the extended portion of the outer peripheral wall of the casing 10. Although the description of the other detailed configuration of the starter unit 7 is omitted, a cover 5 with an intake port 5a is attached to the end surface of the yoke 70 opposite to the air pump 1. And
The axial gap between the yoke 70 and the armature 71 is
A suction air flow passage P communicating with 5a and 10a is formed.

The rotational force of the shaft 16 of the starter unit 7 is transmitted to the clutch 30, the pinion 31, and the ring gear 32, and the clutch 30 is turned on and off by the switch 4.

Further, a pressure switch 15 for detecting the pressure in the pipe is attached to the pipe line 14 on the discharge side, and an output signal of the pressure switch 15 is transmitted to the control device 17.

The operation of this device will be described with reference to the drive circuit shown in FIG.

The engine is started by the rotation of the starter unit 7 and the pinion 31 is started.
When the air pump unit 1 is driven after the gears are disengaged from the ring gear 32, the control device 17 applies a voltage to the terminal 23 of the switch 4 to rotate the armature 71. When the rotor 12 is rotated by the rotation of the armature 71, the airflow sucked from the intake port 5a is supplied to the inside of the yoke 70, the armature 71, and the commutator 7.
2.Cools the brush 73, etc. from the intake port 10a to the discharge port 13,
It is sent to an exhaust pipe (not shown) via 14.

In the starter device with an air pump according to this embodiment, when the key switch 21 remains on, the pressure in the pipeline 14 increases, and the control device 17 uses the output signal of the pressure sensor 15 to start the starter unit. 7 can be detected.

Therefore, when the control device 17 detects the pressure increase for a certain period or more, the interlock contact (not shown) connected in series with the key switch 21 is opened to forcibly cut off the switch 4 which is too long. Thus, overheating of the starter unit 7 and consumption of the battery 22 can be prevented.

Further, since the normal operation time of the air pump unit 1 is about several minutes, the voltage application to the terminal 23 is cut off for the operation of the air pump unit 1 for more than 10 minutes, for example. Can be prevented, and the starter unit 7 can be protected. The air pump unit 1 is often used immediately after starting or when decelerating the vehicle speed.

When a voltage is applied from the control device 17 to the terminal 23 of the switch 4 to operate the air pump unit 1, the starter unit 7 rotates but the current flows through the pull-in coil 4a and the holding coil 4b, and the pull-in coil 4a And the magnetizing force of the holding coil 4b cancel each other, so that the magnet switch MS does not operate and the pinion 31 does not mesh with the ring gear 32.

The air pump unit 1 does not need to be directly connected to the shaft 16 of the starter unit 7.

In addition to the centrifugal air pump unit 1 described above, an axial flow type air pump unit can also be used. Since these centrifugal or axial flow type blowers or compressors require high-speed rotation, they can be directly connected to the starter unit 7 designed to be capable of high-speed rotation, which is convenient.

[Effects of the Invention] As described above, the starter device with the air pump of the present invention employs a configuration in which the starter is cooled by the exhaust pipe purifying airflow generated by the air pump unit driven by the starter unit. The following effects can be obtained.

First, despite the fact that the starter unit, which generally has a short-time rating of several tens of seconds, is used as the drive source, the starter unit is cooled by the airflow for exhaust pipe purification, so the starter unit can be modified without any modification. , The life rise, the maximum output and the longest operation time can be improved.

Further, the starter section can be always cooled by the air flow and the exhaust pipe can be purified at the time of starting the engine, which is particularly advantageous when starting the engine at the time of severe heat.

Normally, the air pump for purifying the exhaust pipe is operated only for a short time of a few minutes, so that the cooling of the air flow can sufficiently suppress a rise in the temperature of the starter, thereby deteriorating the insulating resin and shortening the service life. Can be prevented.

After all, according to the present invention, the starter section which is easily overheated by the engine starting current or the like can be cooled using the air pump section for purifying the exhaust gas. It is possible to realize a small and highly reliable starter device with an air pump which can be sent to the exhaust gas purification section.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic sectional view of an air pump-integrated starter device, and FIG. 2 is a control circuit diagram of the first device. 1 ... Air pump section 2 ... Starter section

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02N 11/00 F01N 3/32 F01P 1/06 F02N 7/00 F02N 7/08

Claims (1)

(57) [Claims] 1. A starter device with an air pump, comprising: an air pump section for feeding an air flow for purifying exhaust gas to an exhaust pipe of an internal combustion engine for a vehicle; and a starter section for driving the internal combustion engine for a vehicle and the air pump section. The air pump unit cools the starter unit when the internal combustion engine for a vehicle is started and when the air flow is sent to the exhaust pipe by feeding the air flow into the exhaust pipe through a passage in the starter unit. A starter device with an air pump.