JPH02227558A - Starting device for vehicle - Google Patents

Abstract

PURPOSE:To lessen scuffing at the sliding sections of an internal combustion engine by changing current to be applied to a starter when cooling water is less than a specified one in temperature, and thereby providing a low speed starting control means which controls the starter to be activated at revolutions lower than a set one. CONSTITUTION:In a starter 2, a battery 6 is arranged in the first cable way 4, and starter motor 8, a field winding 10, a control section 12 as a low speed starting control means, a starting coil 14 and a magnet switch 16 are connected with the battery 6 in order respectively. The field winding 10 is so constituted that two each of the first and second field windings 10-1, and 10-2 which are different in the quantity of winding, are connected therewith in parallel. When the temperature of cooling water detected by a cooling water temperature sensor 18 is less than a specified one, a control section 12 changes the torque of the starting motor 8 by switching the first field winding 10-1 for normal operations over to the second field winding 10-2 so that the starter 2 can thereby be activated at revolutions lower than a set one.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a starting device for a vehicle, and in particular, supplies power from a battery to a starter for starting an engine, starts the starter at a set rotation speed, and starts the vehicle. The present invention relates to a vehicle starting device.

[Prior Art] A starter for starting an engine drives an internal combustion engine during starting, and is composed of a pinion mechanism that transmits the rotational force of the starting motor to the internal combustion engine, and devices such as a magnetic switch that operates these mechanisms. .

As a starter for starting the engine, Utility Model 57-40660
There is something disclosed in the publication No. The engine starting device disclosed in this publication is provided with a plurality of storage batteries connected in parallel, and when a cold start is detected by a detection device, the storage batteries are connected in series, and power is supplied to the starter by a high voltage power supply to start the starter. It is started at high speed rotation.

[Problems to be Solved by the Invention] Incidentally, in the conventional vehicle starting device, the starter 102 for starting the engine is connected to the first electric line 10 as shown in FIG.
4 is interposed with a battery 106, and a starting motor 108, a field winding 1101, a starting coil 114, and a magnet switch 116 are connected in series to this battery 106, respectively.

Further, a second electrical circuit 120 is provided to be parallel to each device other than the battery 10e in the first electrical circuit 104, and a holding coil 122 and a starter switch 124 are connected in series in the middle of the second electrical circuit 120, respectively.

That is, in a low- to high-temperature atmosphere, torque commensurate with the friction caused by temperature acts to start the internal combustion engine.

For example, even at extremely low temperatures, the starting torque capable of starting the internal combustion engine by complete explosion or continuous explosion can be immediately obtained.

However, the starting operation at extremely low temperatures causes rapid sliding motion, which can cause scuffing at the sliding parts of the internal combustion engine.
This has the disadvantage that it is more likely to cause abnormal phenomena such as flng) and other abnormal phenomena.

In addition, with the conventional technology that starts the starter at high speed during a cold start at extremely low temperatures, scuffing and other abnormal phenomena are more likely to occur in the sliding parts of the internal combustion engine, which is disadvantageous in practice. There is an inconvenience.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned disadvantages, the object of the present invention is to provide a vehicle starting device with a cooling water temperature sensor that detects the cooling water temperature, and to control the cooling water temperature according to the detection signal from the cooling water temperature sensor to a predetermined value. Scuffing of sliding parts of an internal combustion engine can be prevented by providing a low-speed start control means that controls the starter to start at a rotation speed lower than the set rotation speed by changing the current supplied to the starter when the temperature is below the set rotation speed. The object of the present invention is to realize a starting device for a vehicle that can reduce friction and sun loss.

[Means for solving the problem] In order to achieve this object, the present invention detects the cooling water temperature in a vehicle starting device having a battery that supplies power to a starter for starting an engine and starts the engine at a set rotation speed. A cooling water temperature sensor is provided, and when the cooling water temperature according to a detection signal from the cooling water temperature sensor is lower than a predetermined temperature, the current supplied to the starter is changed to cause the starter to rotate at a speed lower than the set rotation speed. The present invention is characterized in that a low-speed startup control means is provided for controlling the startup.

[Operation] With the above-described configuration, when the coolant temperature according to the detection signal from the coolant temperature sensor is lower than a predetermined temperature, the low-speed start control means changes the current supplied to the starter to rotate the starter at the set rotation speed. The internal combustion engine is controlled to start at a lower rotational speed than the engine speed, thereby reducing scuffing at the sliding parts of the internal combustion engine and reducing friction loss.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows a first embodiment of the invention. 1st
In the figure, 2 is a starter for starting an engine, which is a starting device for a vehicle.

This starter 2 has a battery 6 interposed in the first electric circuit 4, and a starting motor 8 and a field winding 10 connected in series to the battery 6.
, a control unit 12 serving as a low-speed startup control means, a startup coil 14,
The magnet switches 16 are connected in sequence.

The field winding 10 has two first and second windings with different winding amounts.
It consists of a second field winding 10-1, 10-2, and these first
, second field windings to-i and to-2 are connected in parallel.

Further, a cooling water temperature sensor 18 for detecting the cooling water temperature is provided at a desired location of the internal combustion engine (not shown).

The control unit 12 changes the current supplied to the starter 2 when the coolant temperature according to the detection signal from the coolant temperature sensor 18 is lower than a predetermined temperature, so that the starter 2 has a rotation speed lower than the set rotation speed. It has a configuration that controls the startup.

Specifically, when the cooling water temperature is lower than a predetermined temperature, the control unit 12 switches from the normal first field winding 10-1 to the second field winding 10-2 to reduce the torque of the starting motor 8. change. Then, the starting rotational speed of the internal combustion engine (not shown) is reduced to a rotational speed lower than the rotational speed set by the first field winding 10-1.

In addition, a second electrical circuit 20 is provided in parallel to each appliance other than the battery 6 in the first electrical circuit 4, and a holding coil 22 and a starter switch 24 are connected in series in the middle of this second electrical circuit 20. establish.

Next, the effect will be explained.

When the coolant temperature according to the detection signal from the coolant temperature sensor 18 input to the control unit 12 is lower than a predetermined temperature, the control unit 12 switches the normal first field winding 10-1 to the second field winding. The current supplied to the starter 2 is changed by switching to the winding 10-2, and the torque of the starting motor 8 is changed to start the starter 2 at a rotation speed lower than the set rotation speed.

After a predetermined period of time has elapsed from startup, the control unit 12 switches from the second field winding 10-2 to the normal first field winding 10-1, allowing the normal An internal combustion engine (not shown) is started.

Further, when the cooling water temperature according to the detection signal from the cooling water temperature sensor 18 inputted to the control section 12 is higher than a predetermined temperature, the control section 12 controls the normal first field winding 10-1. The first field winding 10-1 is used without switching from the starting motor 8 to the second field winding 10-2.
A normal internal combustion engine (not shown) capable of complete explosion or continuous explosion is started at a set rotation speed without changing the torque of the engine.

Thereby, when the cooling water temperature is less than a predetermined temperature, the current supplied to the starter 2 can be changed to start the starter 2 at a rotation speed lower than the set rotation speed,
Scuffing of the sliding parts of the internal combustion engine (not shown) can be reduced, friction loss can be reduced, and the service life of the sliding parts of the internal combustion engine can be extended, which is economically advantageous.

Further, depending on the degree of cooling water input to the control unit 12, the normal first field winding 10-1 to the second field winding 10-
By being able to automatically switch to 2, there is no need for a manual switching operation, and usability can be improved.

FIG. 2.3 shows a second embodiment of the invention.

In this second embodiment, parts that perform the same functions as those in the first embodiment described above will be described with the same reference numerals.

The feature of this second embodiment is that when the cooling water temperature is lower than a predetermined temperature, the control unit 30 controls to heat the battery 6 and weaken the current flowing to the starting motor 8.

That is, the controller 30 is connected to the first electric path 4 between the magnetic switch 16 and the junction A of the first and second electric paths 4.20.
The cooling water temperature sensor 18 is connected to the control section 30, and a heater 32 is connected to the control section 30 to heat the battery 6.

To be more specific, the heater 32 is connected to the box 3 as shown in FIG.
The battery 6 is attached to a predetermined part of the box body 34.
The heater 32 indirectly heats the electrolytic solution (not shown) of the battery 6 in response to a control signal from the control section 30.

Then, when the cooling water temperature is lower than a predetermined temperature, the heater 32 indirectly heats the electrolytic solution (not shown) in the battery 6 according to the control signal from the control section 30, and the electrolytic solution (not shown) in the battery 6 is heated. It is possible to start the starter 2 at a rotation speed lower than the set rotation speed by weakening the energizing current, and similarly to the first embodiment described above, scuffing of the sliding parts of the internal combustion engine (not shown) is reduced. This is economically advantageous because friction loss can be reduced and the service life of the sliding parts of the internal combustion engine can be extended.

In addition, by indirectly heating the electrolytic solution (not shown) in the battery 6 to raise its temperature, it is possible to substantially improve the output of the battery 6, and when the battery 6 is switched from starting to starting. The rotation speed can be increased, which is advantageous in practice.

Note that this invention is not limited to the above-mentioned first and second embodiments, and can be modified in various ways.

For example, in the second embodiment of the present invention, the heater 32 is attached to a predetermined part of a box 34, the battery 6 is housed in the box 34, and the heater 32 is controlled by a control signal from the control section 30. However, as shown in FIG. 4, a heater 40 is built directly into the battery 6, and the heater 40 heats the electrolyte (not shown) of the battery 6 indirectly. (not shown) can also be heated directly.

Furthermore, if a circuit having a fuel cut function is connected to the control section of the first and second embodiments of the present invention, the fuel cut can be executed at the time of starting the internal combustion engine by the output signal from the control section, which is different from the conventional method. In contrast, it is possible to realize an economically advantageous vehicle starting device that can reduce fuel consumption.

[Effects of the Invention] As described in detail above, according to the present invention, the vehicle starting device is provided with a cooling water temperature sensor that detects the cooling water temperature, and when the cooling water temperature based on the detection signal from the cooling water temperature sensor is lower than a predetermined temperature. A low-speed start control means is provided to change the current supplied to the starter and control the starter to start at a rotation speed lower than the set rotation speed. It is possible to start the starter at a lower rotation speed than the set rotation speed by changing the supplied current, reducing scuffing of the sliding parts of the internal combustion engine, and minimizing friction sun loss. , the service life of the sliding parts of the internal combustion engine can be extended, which is economically advantageous. Further, since the cooling water temperature can be automatically controlled based on the temperature of the cooling water input to the low-speed start-up control means, manual switching operations are no longer necessary, and usability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic circuit diagram of a starter for starting an engine, which is a vehicle starting device, showing a first embodiment of the present invention. 2.3 shows a second embodiment of the present invention, FIG. 2 is a schematic circuit diagram of a starter for starting an engine, and FIG. 3 is a schematic perspective view of a battery and a box. FIG. 4 is a schematic perspective view of a battery showing another embodiment of the invention. FIG. 5 is a schematic circuit diagram of a starter for starting an engine showing the prior art of the present invention. In the figure, 2 is a starter for starting the engine, 4 is a first electric circuit,
6 is a battery, 8 is a starting motor, 1o-1 is a first field winding, 10-2 is a second field winding, 12 is a control unit, 14 is a starting coil, 16 is a magnet switch, 18 is a cooling water temperature 20 is a second electric circuit, 22 is a holding coil, and 24 is a starter switch. Figure 1 Patent Applicant Suzuki Motor Co., Ltd. Agent Yoshimi Saigo Figure 2

Claims (1)

[Claims] 1. In a vehicle starting device having a battery that supplies power to a starter for engine starting and starts the engine at a set rotation speed, a cooling water temperature sensor is provided to detect the cooling water temperature, and the cooling water temperature is determined by a detection signal from the cooling water temperature sensor. For a vehicle, characterized in that a low-speed start control means is provided for controlling the starter to start at a rotation speed lower than the set rotation speed by changing the current supplied to the starter when the temperature is lower than a predetermined temperature. Starting device.