JPH02153260A - Engine starter control device - Google Patents

Abstract

PURPOSE:To prevent a starter from rupture by a method wherein, in a device which starts an engine and an automatic speed change gear by means of an engine starter, the rotation state of an automatic speed change gear is detected, based on a detecting result therefrom, an engine starting action is rendered ineffective by means of a starter. CONSTITUTION:When an ignition switch 3 is turned ON, an armature shaft 7 of a starter 6 is rotated, a pinion 10 is moved in the direction of an arrow mark 23 as it is rotated. Through engagement of the pinion 10 with a ring gear 2, an engine is cranked. When, through running of the engine 1, an automatic speed change gear 5a is started to rotated, a line pressure 13 is generated to move forward a shaft part 16b of a piston 16 of a hydraulic actuator 22 to an actuating position 16A, and when the movement is detected by means of a sensor 20, a display lamp 21 is lighted ON. Even when, with this state, an ignition switch 3 is erroneously switched ON, since the piston shaft part 16b is moved forward to an actuating position 16A, movement of the pinion 10 is blocked.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a control device for an engine starter used when starting an engine of an automobile or the like. The present invention relates to an engine starter control device that can disable the engine starting action of a starter.

(B) Conventional technology In general, an engine starter used to start the engine of a car, etc. consists of a motor that rotates when an ignition switch is connected, and a ring gear on the engine side that engages with a ring gear when the motor rotates to crank the engine. It has a pinion etc. that rotates the shaft.

An example of a conventional engine starter of this type is shown in FIG. The starter motor 42 of the engine starter 6 includes a stator 45a fixed in a case 43 and an armature 45b integrated with an armature shaft 7 rotatably supported by the case 43. A clutch sleeve 49 is fitted into the helical spline 9 formed on the armature shaft 7.
9 is connected to a pinion 10 loosely engaged with the armature shaft 7 via a one-way roller clutch 51. The pinion 10 is normally connected to the starter motor 42 by the elasticity of a return spring 12 provided between the pinion 10 and a boss 52 fixed to the end of the armature shaft 7.
He has been returned to the side. A ring gear 2 is integrally provided on a crankshaft 1a of an engine 1 of an automobile or the like.

An ignition switch 3 is connected to the engine starter 6, and when the ignition switch 3 is connected, the starter motor 42 is energized, and the armature shaft 7
And when the pinion 10 starts rotating with angular acceleration,
A pinion assembly 58 consisting of a pinion 10, a clutch sleeve 49, etc. has an inertia and a helical spline 47.
Due to this action, it overcomes the compressive force of the return spring 12 and pops out to the shaft end side. This protruding pinion 10 meshes with the ring gear 2 and the crankshaft 1 is integrated with the ring gear 2.
a and crank the engine 1 to start the engine 1. When the engine 1 ignites and the circumferential speed of the ring gear 2 becomes faster than that of the pinion 10, the ring gear 2 conversely works as a driving gear, and the pinion 10 is automatically returned to the starter motor 42 side by the action of the helical spline 9. The rotation of the starter motor 42 and the axial movement of the pinion 10 toward the ring gear 2 by the connection operation of the ignition switch 3, which disengages from the ring gear 2, can be performed even when the engine 1 is rotating. It looks like this.

(C) Problems to be Solved by the Invention Modern automobile engines have been improved to reduce their rotational noise, and when the automobile is stopped and the engine is running, it is difficult for the driver to There were times when I operated the ignition switch without realizing it.

Furthermore, as described above, the conventional engine starter 6 has a problem in that it operates to start the engine 1 when the ignition switch 3 is connected, even if the engine 1 is already in a rotating state. Unfortunately, if the pinion 10 of the engine starter 6 attempts to mesh with the ring gear 2 on the engine 1 side while the engine 1 is rotating, there is a risk that the tooth tips of the pinion 10 and the ring gear 2 will be damaged. Furthermore, even if the pinion 10 meshes with the rotating ring gear 2, the pinion 10 is reversely driven from the engine 1 side, so there is a risk that internal parts of the engine starter 6 will rotate at high speed and damage the engine starter 6. be.

Therefore, the present invention provides an engine starter control device that solves the above-mentioned problem by disabling the engine starting action of the engine starter 6 even if the ignition switch 3 is accidentally connected while the engine is rotating. The purpose is to

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances, and as shown in FIGS. 1 and 2, for example, when the ignition switch (3) is connected, the Engine starter (
6), in the engine starting device for starting an engine (1) and an automatic transmission (5a) connected thereto, a rotational state detection means (13) for detecting a rotational state of the automatic transmission (5a); , the rotation state detection means (13)
Particular effect (e) characterized in that the engine start preventing means (22) is provided to disable the engine starting action by the engine starter (6) based on a signal from the engine 1. When the connected automatic transmission (5a) (Fig. 1) is hydraulically controlled, the means (13) for detecting the rotational state of the automatic transmission (5a) detects the rotational state of the automatic transmission (5a). The detection signal is based on the hydraulic pressure such as line pressure that occurs at the time of the test. This oil pressure is supplied into a start prevention cylinder (22) which functions as an engine start prevention means, and whose piston (16) is connected to an automatic transmission (
5a) is in the solid line position when it is not rotating, and when the ignition switch (3) is connected, the pinion (10) of the engine starter (6) and the engine side link gear (2
). In addition, automatic transmission (5a
) is in a rotating state and when its oil pressure is supplied to the start prevention cylinder (22), the piston (16) is in the prevention position shown by the chain line! (16A) to prevent the pinion (10) from moving in the direction of the arrow (23).
) and the ring gear (2) are prevented from meshing, and the engine starting action of the engine starter (6) is disabled.

In addition, an automatic transmission (5b) (
If the automatic transmission (Fig. 2) is electronically controlled, the automatic transmission (Fig.
When b) is not rotating, the ignition switch (
3), the electronic control unit (ECU) (26) supplies power to the engine starter (6) and rotates it, thereby starting the engine (1). When the automatic transmission (5b) is in a rotating state, a rotation detection signal (27) from the automatic transmission (5b) causes the electronic control unit (ECU) to
) (26) to the engine starter (6), thereby disabling the engine starting action of the engine starter (6) regardless of the operation of the ignition switch (3). Further, when the circuit to the engine starter (3) is in an off state, a warning light (21) is turned on to indicate that the engine (1) is in a rotating state.

Note that the above-mentioned symbols in parentheses are for contrast with the drawings, and do not limit the structure of the present invention in any way.

(F) Example Hereinafter, a first example of the present invention will be described based on FIG. An armature shaft 7 of an engine starter (hereinafter referred to as a starter) 6 is rotated by a connection operation of an ignition switch 3. A pinion 1o is fitted into a helical spline 9 formed on this armature shaft 7, and this pinion 10 has an extensible structure whose both ends are pressed into contact with a snap ring 11 fixed to the shaft end and a pinion 10, respectively. Due to the elasticity of the return spring 12, the starter 6
It is pressed against the front end of the

The operation of the automatic transmission 5a is controlled by hydraulic control, and when the automatic transmission 5a is driven by the engine 1 and starts rotating, it generates hydraulic pressure such as line pressure. With this hydraulic pressure,
The rotating state detecting means 13 is used to detect that the automatic transmission 5a is in a rotating state. The oil pressure (rotation state detection means) 13 is connected to a boat 15 provided at the rear of the cylinder 5.
connected to a. The large diameter portion 16a of the piston 16 is fitted into the cylinder 5 in a sealed manner by the O-link 17. The shaft portion 16b of the piston 16 is connected to the cylinder 15.
The end face 16c thereof extends toward the starter 6 side, and its end face 16c faces the front face 10a of the pinion 10, and when the automatic transmission 5a is in a non-rotating state, it is biased toward the cylinder 15 side from the position of the front face 2a of the ring gear 2. It is in the retracted position shown by the solid line. The piston 16 has a compression spring 1 whose both ends are in pressure contact with the large diameter portion 16a and the inner wall surface of the cylinder 15.
9 is biased toward the boat 15a. When hydraulic pressure from the automatic transmission 5a acts on the cylinder 15, the piston 16 moves toward the starter 6 against the compression spring 19, and the shaft portion 16b of the piston 16 advances to the operating position 16A shown by the chain line. . This advancement of the shaft portion 16b is detected by a sensor 20, and an indicator lamp 21 is turned on. A hydraulic actuator 22 is constituted by the cylinder 15, piston 16, compression spring 19, and the like. Further, the ignition switch 3, starter 6, pinion 10, etc. constitute an engine starting device 25.

Next, the operation of the above embodiment will be explained.

When the engine 1 and the hydraulically controlled automatic transmission 5a are in a non-rotating state, the piston 1 of the start prevention cylinder 22
6 is in the retracted position shown by the solid line as described above. When the ignition switch 3 is connected in this state, the starter 6 is energized and the armature shaft 7 of the starter 6 begins to rotate, and this rotation causes the nion 10 to rotate in the direction of the arrow 23 due to inertia and the action of the helical spline 9. do. By this movement of the pinion 10 to the chain line position 10A, the pinion 10 meshes with the ring gear 2 to rotate it, cranking the engine 1 and activating it. When the engine 1 is ignited and the circumferential speed of the ring gear 2 becomes faster than that of the pinion 10, the pinion 10 is driven by the ring gear 2 and is automatically returned to the starter 6 side by the action of the helical spline 9.

When the automatic transmission 5a starts rotating due to the rotation of the engine 1, a hydraulic pressure (rotation state detection means) 13 such as line pressure is generated. When this oil pressure 13 acts on the cylinder 15 of the hydraulic actuator 22, the shaft portion 16b of the piston 16 advances to the operating position 16A. During the movement of the piston 16, the shaft portion 16b is detected by the sensor 20, and the indicator lamp 21 lights up, indicating that the engine 1 and automatic transmission 5a are in a rotating state.

If you connect the ignition switch 3 without noticing it while the engine 1 and automatic transmission 5a are in a rotating state, the pinion 10 of the starter 6 will start rotating and turn the switch indicated by the arrow 2.
Try to move in 3 directions. However, engine 1
When the automatic transmission 5a is in a rotating state, the shaft portion 16b of the piston 16 has advanced to the operating position 16A, so movement of the pinion 10 in the direction of the arrow 23 is prevented. Therefore, when the engine 1 and the automatic transmission 5a are in a rotating state, the pinion 10 and the ring gear 2 are prevented from meshing, and the engine starting action of the starter 6 is disabled, despite the connection action of the ignition switch 3. ing. By preventing the pinion 10 from meshing with the rotating ring gear 2 in this way, damage to the pinion 10 and the ring gear 2 that would occur during meshing is prevented, and furthermore, the high-speed rotation of the internal parts of the starter 6 due to the reverse drive from the ring gear 2 is prevented. Damage to parts due to this is prevented.

FIG. 2 shows a second embodiment of the invention.

In the second embodiment, an electronically controlled automatic transmission 5b is connected to the engine 1.
The electronic control unit 26 controls the gear shifting action, lock-up action, etc.

When the automatic transmission 5b is in a rotating state, this rotation is detected by a suitable detection device, which is converted into an electrical signal and input to the electronic control device 26. The rotation detection signal 27 based on the electric signal is used as a rotation state detection means for knowing that the automatic transmission is in a rotation state.

The switch connection signal of the ignition switch 3 is input to the electronic control device 26, and when the engine 1 and the automatic transmission 5b are in a non-rotating state and the rotation detection signal 27 is not generated, the electronic control device 26 Start signal 29 is input to starter 6 when connection signal is input.
It is controlled to output to . When the starting signal 29 is energized and the starter 6 begins to rotate, the pinion 10 rotates and moves in the direction of the arrow 23, meshing with the ring gear 2 and rotating it to start the engine 1, similar to the device shown in FIG. Start it. When the automatic transmission 5b is in a rotating state, the rotation detection signal 27 is input from the automatic transmission 5b to the electronic control device i26 as described above. Under this state, when the connection signal from the ignition switch 3 is input to the electronic control device 26, the electronic control device 26 is controlled not to output the starting signal 29. The engine rotation inhibiting means 22 has a function of disabling energization 29 to the starter 6. Further, when the rotation detection signal 27 is input to the electronic control device 26, the display lamp 21 lights up, indicating that the engine 1 and the automatic transmission 5b are in a rotating state. By disabling the starter 6 from being energized when the ignition switch 3 is connected in this way, the engagement of the pinion 10 with the rotating ring gear 2 and any adverse effects caused by this are prevented.

(G) As described in detail, according to the present invention, the rotational state of the automatic transmission is detected by the rotational state detecting means, and based on this detection signal, the engine starting prevention means or the starter takes action to start the engine. This prevents the engine starter's pinion from engaging with the ring gear and any harm caused by this, even if the ignition switch is connected and operated without the user's knowledge of this while the engine and automatic transmission are in a rotating state. Can be done.

Further, when the rotational state detection means (13) detects that the engine (1) and the automatic transmission (5a) are in a rotating state, the piston (16) of the engine start prevention means (22) is in the operating position. (16A) and prevents the meshing action of the pinion (10) with the link gear (2), disabling the engine starting action of the starter (6), so that the pinion (10) and ring gear (2) It is possible to prevent meshing and the harmful effects caused by this.

In addition, an engine (1) and an electronically controlled automatic transmission (5
b) is in a rotating state, the rotating state detecting means (27
), the engine start prevention means (
26) sends an engine start signal (2) to the starter (6).
9), even if the ignition switch (3) is connected, the starter (6) cannot start the engine, and the pinion (10)
It is possible to prevent meshing between the link gear (2) and the link gear (2) and the adverse effects caused by this.

Also, engine (1) and automatic transmission (5a) (5b)
Since the indicator lamp (21) is lit when the ignition switch is in a rotating state, by checking the indicator lamp (21) in advance, the operation of connecting the ignition switch (3) can be made unnecessary.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical side view of an engine starter control device showing one embodiment of the present invention, FIG. 2 is a schematic side view of an engine starter control device showing another embodiment of the invention, and FIG. FIG. 1 is a side view of a part of a conventional engine starter device.

Claims (4)

[Claims] 1. An engine starting device that starts an engine and an automatic transmission connected thereto by an engine starter that rotates when an ignition switch is connected, comprising: a rotational state detection means for detecting a rotational state of the automatic transmission; and a rotational state detection means for detecting a rotational state of the automatic transmission. An engine starter control device comprising: engine start prevention means for disabling the engine starting action by the starter based on a signal from the means. 2. The engine start prevention means advances the piston toward the movable starter pinion of the starter using hydraulic pressure of the hydraulic system generated by the rotation of the automatic transmission, and connects the starter pinion to a ring gear integrated with the output shaft of the engine. The engine starter control device according to claim 1, which is a hydraulic actuator that prevents meshing. 3. 2. The engine starter control device according to claim 1, wherein the engine start prevention means is an electronic control device that disables energization to the starter based on a rotation detection signal of an automatic transmission. 4. The engine starter control device according to claim 1, further comprising an indicator lamp for indicating that the start prevention means is in operation.