JPS5851273A - Starting apparatus - Google Patents

Abstract

PURPOSE:To reduce the impulsive load and inpulsive noises produced at the time of starting, by applying a specific control on rotation of a starting motor of an inertia sliding type starting apparatus, and reducing the speed at which a pinion gear comes into mesh with a ring gear. CONSTITUTION:With closing of a switch 7, current is supplied from a power source 1 simultaneously to each of a differentiating circuit 8 and a delay circuit 9 of a control circuit 4. At first, a transistor 6a is turned ON by the output of the circuit 8, and during the while, a contact 3 is closed through energization of a coil 3a, so that a magnet switch 3 is turned ON. When the charging voltage of a capacitor 16 in the circuit 9 becomes greater than the yield voltage of a diode 17 after the switch 3 is turned OFF, the switch 3 is turned ON again through energization of a transistor 6b. Resultantly, the speed of rotation of a motor 2 is changed as shown at (b) in the drawing. That is, the speed of the motor 2 has been lowered at a time instant t1 when a pinion gear comes into mesh to a ring gear. When these two gears are engaged with each other and an engine is started, the switch 7 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an inertia sliding type starting device that initially rotates the starting motor for a short time in response to the closing operation of a manual switch, and when the pinion gear jumps, the pinion gear is rotated in a decelerating state. The present invention relates to a starting device that drives an engine by engaging a ring gear and rotating a starting motor at a normal speed again after engagement.

An inertia sliding type starter operates the starter motor during startup, rotates the pinion gear, and slides the starter gear into engagement with the ring gear on the other side (engine side), thereby transferring power from the starter motor to the engine. 2, and acts as if driving the engine. The electric circuit section of the conventional inertia sliding type starting device is shown in FIG. 4 [7], and its problems will be clarified. In Figure 4,
When the driver presses the switch 30 to turn it on, the electromagnetic coil 31 is energized, the contact 32 is closed, and the battery power supply 33 supplies electricity to the starter motor 34 to rotate it. However, in the circuit configuration shown in FIG. 4, the rotation of the starter motor 34 is rapidly accelerated and reaches the maximum rotation. This state is shown in Fig. 5(a) and (bl).For this reason, the angular acceleration of the pressure in the pinion gear, which rotates together with the starter motor 34 of the starter, continues until the motor reaches its maximum rotation. I will be joining the
As a result, the pinion gear jumps into the mating ring gear in a state b1 with extremely high momentum and attempts to engage with the ring gear. At this time, since the ring gear is stationary together with the engine, a collision occurs between the pinion gear and the ring gear, which generates a large load and impact noise.

The present inventor has created the present invention in order to effectively solve the above-mentioned problems in the inertial sliding type starter.

An object of the present invention is to reduce the jumping speed of the pinion gear when the gear and ring gear engage in an inertia sliding type starting device by applying a certain control to the rotation of the starter motor. An object of the present invention is to provide a starting device which reduces impact load and impact noise.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a circuit configuration of a starting device according to the present invention, where 1 is a battery power source provided in a vehicle, and 2 is a starter motor for starting the engine. A mechanical system including a pinion gear that rotates with the motor 2 and a ring gear that engages with the pinion gear and transmits the power of the motor to the engine is provided between the motor 2 and the engine.
Since inertial sliding starter systems are well known, the mechanical system is not shown in FIG. 3 is a starter magnet switch, and the magnet switch 3 consists of a coil 3a, which is an electromagnet, and a contact 3b.
When electricity flows through it, it is excited and attracts the contact 3b, closing it and supplying electricity to the motor 2, causing the motor 2 to rotate. Reference numeral 4 denotes a control circuit according to the present invention, and the control circuit 4 includes a circuit section 5 consisting of a differentiating circuit and a delay circuit, and a switching element 6 that performs a predetermined opening/closing operation as described later by each output of the differentiating circuit and the delay circuit. When the driver operates a manual suppression switch 7 provided in the circuit section 5, the switch element 6 performs a predetermined opening/closing operation based on the operation of the switch 7, thereby performing a certain control operation. It is something. The opening/closing operation of the switch element 6 can perform a predetermined control operation to control energization and de-energization of the coil 3a. Next, the configuration of such a control circuit will be specifically shown and its operation will be explained.

FIG. 2 shows an embodiment of the circuit configuration of the control circuit 4. In FIG. Second
In the figure, the same elements as shown in FIG. 1 are given the same reference numerals, and the circuit elements to which conductive wires are connected are specified to clarify the correspondence with FIG. 1. The control circuit 4 is composed of a differentiating circuit 8 and a delay circuit 9. The circuit combining the differentiating circuit 8 and the delay circuit 9 corresponds to the circuit section 5 in FIG. A parallel circuit of the transistor 6a and the transistor 6b forming the output section of the delay circuit 9 corresponds to the switch element 6.

The differential circuit 8 consists of a capacitor 10 and a resistor 11.
It is a differentiating circuit, and inputs a voltage divided by resistors 12 and 13 connected in series.

The differential output of the differentiating circuit 8 is applied to the base of the transistor 6a via the diode 14. With the circuit configuration described above, the transistor 6a is maintained in an on state only for a certain period of time during which a differential output is provided.

The delay circuit 9 is mainly composed of a resistor 15, a capacitor 16, and a Zener diode 17. When electricity is supplied from the power source 1, the capacitor 16 is charged via the resistor 15, and the charging voltage of the capacitor 16 is equal to the breakdown voltage of the Zener diode 17. Since the configuration is such that the base of the transistor 19 is energized via the resistor 18 after a certain period of time has passed until the voltage becomes larger than the voltage, the input state of the open circuit 90 for the certain period of time is delayed and output. When a current is applied to the base of the transistor 19, the transistor 19 turns on, and further, the emitter current of the transistor 19 is applied to the base of the transistor 6b, turning on the transistor 6b. Delayed turn-on operation. Delay time is resistor 15
, the capacitor 16, and the Zener diode 17. Furthermore, diode 20
The resistor 21 is mainly used to appropriately discharge the charge stored in the capacitor 16, and the resistor 21 is used to appropriately adjust the value of the emitter current of the transistor 19.

Further, the transistor 6a, which is the output part of the differentiating circuit 8, and the transistor 6b, which is the output part of the delay circuit 9, are connected so that their collectors and emitters are in a parallel relationship.

Next, the operation of the starting device based on the control circuit 4 having the above configuration will be explained with reference to FIG. To start the engine of the vehicle, the driver first presses the manual start switch 7. When the switch 7 is pressed to close it, electricity is supplied from the power source 1 to the differentiating circuit 8 and the delay circuit 9 of the control circuit 4 at the same time.
The transistor 6a is turned on only for a short time by the differential output of , and during this time the coil 3a is energized and the contact 3
By closing b, the magnetic switch 3 is turned on (state A), and after the magnetic switch 3 is turned off, the charging voltage of the capacitor 16 of the delay circuit 9 becomes larger than the breakdown voltage of the Zener diode 17. At this time, as described above, the starter is operated so that the transistor 6b=z is turned on and the magnet switch 3 is turned on again (state B). Therefore, the motor 2 is energized for a short time at the same time as the switch 7 is closed, and then the energization is stopped once and then energized again, so that the rotational speed of the motor 2 is as shown in Fig. 3(b). It changes like this. As a result, at time t1 when the pinion gear and ring gear engage, the rotational speed of the motor 2 is in a reduced state and is in a low rotational speed state (state a).

When the pinion gear and the ring gear are engaged and the power of the motor 2 is transmitted to the engine to drive the engine, the switch 7 is then released from the pressure and opened. In this way, the charge on the capacitor 10 is discharged via the resistor 11.13, and the charge on the capacitor 16 is also discharged through the diode 2.
0 is discharged through the resistors 12 and 13, and as a result, the transistor 6b is turned off, the magnetic switch 3 is turned off, and the states of the control circuit 4 and the starter device are returned to their initial states.

As described above, in the inertia sliding type starting device, when the pinion gear engages with the ring gear, the rotation of the motor 2 is initially accelerated by stopping the supply of electricity and temporarily decelerating the rotation of the motor 2. The plunge speed of the pinion gear is then sufficiently reduced (state b), so the collision with the ring gear during engagement is lighter than before, making it possible to sufficiently suppress large loads and large impact noises. becomes. FIG. 3(C) shows changes in the plunge speed of the pinion gear in response to changes in the rotational speed of the motor 2. When this is compared with FIG. 5(C), which shows the change in jump speed of the conventional pinion gear, the difference is remarkable.

In the present invention, the above control method is performed using the differentiating circuit 8 and the delay circuit 9, but the present invention is not limited to this. Instead, a timer circuit or the like can generally be used, or an SCR or the like can be used as the switch element 6, etc. It is of course possible to arbitrarily change the design of the circuit without departing from the gist of the present invention.

In the above, in response to the closing operation of the switch 7, turning on the transistor 6a causes the motor 2 to rotate instantaneously for the first time, and delaying the turning on of the transistor 6b causes the motor 2 to rotate again. The delay time is set in advance using a circuit, and this set time is determined as appropriate depending on each starting device.

As is clear from the above description, according to the present invention, since the operation of the starter motor is temporarily decelerated at the time of starting in the inertia sliding type starting device, it is possible to sufficiently reduce the jumping speed of the pinion gear. As a result, it is possible to reduce large impact loads and noise generation, and in particular, it protects the starter drive system and improves its durability, as well as suppresses unpleasant noise and improves the ride feeling. demonstrate.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a circuit diagram of the starting device, Fig. 2 is a circuit diagram of the control circuit, and Fig. 3 is a diagram of each part of the circuit explaining the operation of the starting device according to the present invention. FIG. 4 is a state diagram of a conventional starting device, and FIG. 5 is a diagram similar to FIG. 3 of the conventional starting device. In the drawing, 1 is a battery power source, 2 is a starter motor, and 3 is a battery power source.
Reference numeral denotes a starter magnet switch, a 4-piece control circuit, 5 a circuit section, a 6-piece switch element, 8 a differential circuit, and 9 a delay circuit. Patent Applicant Honda Motor Co., Ltd. Representative Patent Attorney Yoshi Shimoda Patent Attorney Kunihiko Ohashi 11-I',) Government Machinery -'-L ■Goku C) Partitional Procedures Amendment (Voluntary) 1982 April 15th, 2017 Relationship with the case of the person amending the name of the invention's starting device, Mr. Haruki Shimada, Commissioner of the Office Date of amendment order for patent applicant (532) Honda Motor Co., Ltd.'s agent Self-initiated

Claims (1)

[Claims] An inertia sliding type starting device includes a switch element that supplies electricity to the starting motor, a circuit that turns on the switch element for a set time immediately after the operation of the manual switch, and a circuit that turns on the switch element for a set time immediately after the operation of the manual switch. A starting device comprising a control circuit that turns on the switch element after a set time based on the operation.