JPS6022499A - Generating set of vehicle with internal combustion engine - Google Patents

Abstract

PURPOSE:To rotatably drive a generator at a suitable rotating speed even at idling and high speed times by forming a transmission having a pulley for coupling the generator to an internal combustion engine via a planetary gear unit and an electromagnetic brake. CONSTITUTION:An alternator 1 for a vehicle is coupled to and driven by an internal combustion engine via a pulley 12 and a belt. The pulley 12 and a rotor shaft 7 are coupled via a planetary gear unit 13 having a sun gear 15, a ring gear 17, and a plurality of planetary pinions 18, and the ring gear 17 is coupled via a spline to an electromagnetic brake 19. The gear 17 is secured by the excitation of the brake 19, the shaft 7 is rotated at a high speed via the pulley 12, and the pulley 12 and the shaft 7 are coupled directly and rotated by releasing the brake 19. Accordingly, the brake 19 is controlled by detecting the idling operation to variably control the generator, thereby reducing the loss of auxiliary devices of the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power generation device for a vehicle with an internal combustion engine such as an automobile, and more particularly to a drive control device for a generator driven by an internal combustion engine.

Vehicles such as automobiles have a generator such as an alternator (alternating current generator) that supplies power to electrical equipment. It is designed to be driven by an engine. Since the generator mounted on the vehicle is driven by the internal combustion engine, the output voltage of the generator changes in proportion to the engine speed until the output current of the generator reaches a saturation value.

Conventionally, in general, the generator has been designed to generate a predetermined output current even during idling, when the engine speed is the lowest during normal vehicle operation. The pulley ratio of the belt-type electric device is determined so that the belt-type electric device is rotated at a rotational speed of There is a tendency. However, as the pulley ratio increases, the auxiliary equipment loss of the internal combustion engine increases, and especially when the internal combustion engine is operating at high speed, the generator is driven to rotate at an excessive rotation speed, resulting in an increase in unnecessary auxiliary equipment loss. This causes deterioration of the acceleration performance and high-speed operation performance of the internal combustion engine, as well as deterioration of fuel economy.

In view of the problems with power generation devices in vehicles equipped with internal combustion engines as described above, the present invention makes it possible to variably control the ratio between the rotation speed of the generator and the rotation speed of the internal combustion engine, thereby enabling high-speed operation even during idling operation. An object of the present invention is to provide an improved power generation device that can be rotated at an appropriate rotational speed even when the engine is in use, and that does not unnecessarily increase auxiliary loss of an internal combustion engine.

Such objects, according to the present invention, include a generator such as an alternator, a transmission such as a planetary gear set having an input member drivingly connected to an internal combustion engine and an output member drivingly connected to an input member of the generator; Controls the gear ratio of the transmission
- J: This is achieved in the power generation device of an internal combustion engine vehicle having a combustion engine device, etc.

According to this configuration, when the rotational speed of the internal combustion engine is low, such as during idling operation, the speed ratio of the transmission (rotational speed of the output member / rotational speed of the input member) is increased, so that the rotational speed of the generator is increased. is maintained below the minimum required value, and when the rotational speed of the internal combustion engine is high such as during high-speed operation, the gear ratio of the transmission is reduced to prevent the rotational speed of the generator from rising excessively. This reduces wasteful auxiliary losses in the internal combustion engine.

The invention will now be described in detail by way of example embodiments with reference to the accompanying drawings.

FIG. 1 shows one embodiment of the power generation device according to the invention. In the figure, 1 indicates an alternator, and the alternator consists of an annular stator core 3 and a stator coil 4 fixedly arranged in a housing 2, and a front bearing 5.
a rotor shaft 7 rotatably supported on the housing 2 by a rear bearing 6; a rotor 8 fixedly supported on the rotor shaft 7;
It has a brush 9 and a slip ring 10 that energize the field coil 8a.
A current is generated in the stator coil 4 by rotating the rotor 8 with the magnet a being excited.

A pulley 12 is rotatably provided at the tip of the rotor shaft 7 via a bearing 11 . The pulley 12 is drivingly connected to a pulley attached to the crankshaft of an internal combustion engine (not shown) by an endless transmission belt (not shown), and is rotationally driven by the internal combustion engine. are drive-coupled by a planetary gear system 13.

The planetary gear device 13 includes a sun gear 15 fixed to the rotor shaft 7 by a key 14, a ring gear 17 connected to the 1-9 shaft 7, and a pulley 1 by a one-way clutch 16.
2 rotatably supported by a sun gear 15 and a ring gear 17.
It has a plurality of planetary pinions 18 that mesh with the planetary pinions 18 at the same time.

The ring gear 17 is selectively fixed to the housing 2 by an electromagnetic brake 19. The electromagnetic brake 19 includes a coil 20 and a core 21 fixed to the housing 2, and a brake disc 22 splined to the hub portion of the ring gear 17, and is excited when the coil 2o is energized.] When the core 1 is magnetized, it magnetically attracts the brake disk 22 and fixes the link gear 17 to the housing 2.

In the planetary gear device 13, when the ring gear 17 is fixed by the electromagnetic brake 19, the planetary binion 18 rotates while revolving around the syn gear 15 as the pulley 12 rotates, increasing the rotation speed of the sun gear 15. speed up That is, at this time, the planetary gear device 13
acts as a speed increasing device, and the rotor shaft 7 comes to rotate at a higher speed than the pulley 12.

On the other hand, when the electromagnetic brake 19 is in a released state and the ring gear 17 is not fixed, the planetary binion 18 rotates while revolving around the sun gear 15 as the pulley 12 rotates, and the ring gear 17 rotates. In the locked state, the rotor shaft 7 rotates integrally with the ring gear 17. That is, at this time, pulley 1
2 and the rotor shaft 7 are directly connected, and the rotor shaft 7 is connected to the pulley 12.
It will rotate at the same speed.

Attached to the housing 2 is an electrical equipment case 23 housing a voltage regulator 24 as shown in FIG.

The energization control for the coil 20 of the electromagnetic brake 19 is performed as appropriate depending on the required output characteristics of the alternator 1 (for example, by detecting whether or not the internal combustion engine is running at idle by turning on the idle switch, Only during idling operation, the M star gear device 13 acts as a speed increasing device to drive the rotor shaft 7 to rotate at an increased speed, or the output current or output voltage of the alternator 1 is controlled by the current sensor 1 or (It is detected by a voltage sensor, and only when the current value or voltage value is less than a predetermined rated value, the planetary gear device 13 acts as a speed increasing device [1-9 shaft 7 is driven to rotate at an increased speed. J: Yes.

The energization control for the electromagnetic brake 19-21 is performed using a microphone computer as described below according to the rotational speed of the internal combustion engine and the voltage value of the field coil 8a of the alternator 1. J: Yes.

FIG. 3 shows one embodiment of an energization control device using a microcomputer. In Fig. 3, 25 is a microphone [l21 pump 1-, 26 is a rotation speed sensor that detects the rotation speed of the internal combustion engine that drives the alternator, and 2
Reference numeral 7 indicates a voltage sensor that detects the voltage value of the field coil 8a of the alternator 1. Voltage sensor 27
As shown in FIG. 2, the field coil 8a
It may be provided in parallel with the shut resistance element R provided in the middle of the current-carrying circuit.

FIG. 4 shows a control routine for the electromagnetic unit 11 and the control unit 19 by the microcomputer 24. This routine is executed every predetermined time or every predetermined crank angle, and in step 1, the rotation speed NO of the internal combustion engine detected by the rotation speed sensor '26 is set to a predetermined value, for example 8'O'Orpm.
A determination is made as to whether or not it is smaller. Ne≦8'0
When 'O'Orpm, that is, during idling operation, the process proceeds to step 2. On the other hand, when NO≦8'O'Orpm, the process proceeds to step 3.

In step 2, the voltage value Fv of the field coil 8a detected by the voltage sensor 27 is set to a predetermined value, for example 0.
．． A determination is made as to whether or not the voltage is greater than 7V. Fv≧0.
7v, proceed to step 4, whereas Fv≧0
．． If it is not 7'V, proceed to step 5.

In step 5, it is determined whether the voltage value [V] of the field coil 8a detected by the voltage sensor 4I27 is a predetermined value, for example, 0.4V or more -1-. FV
When ≧0.4v, proceed to step 4, whereas F
If v≧0.4V is not satisfied, proceed to Step 3.

In step 3), it is determined whether flag 1: is O. Flag F is a flag indicating whether or not the coil 20 of the electromagnetic brake 19 is energized;
When F='O, the coil 20 is not energized, and when F=1, the coil 20 is energized. In step 3, if F='O, then 1~ is selected; on the other hand, if it is not F-0, the process goes to step 6.

In step 6, power supply to the coil 20 is stopped. As a result, at this time, the rotor shaft 7 rotates at the same speed as the pulley 12 without being accelerated.

After step 6, the process advances to step 7, and in this step, flag F is set to 0. Step -〇- 70th order is reset.

In step 4, it is determined whether flag F is 1 or not. When F=1, the process is reset, whereas when F=1, the process proceeds to step 8.

In step 8, the coil 20 of the electromagnetic brake 19 is energized. As a result, at this time, the planetary gear device 1
The ring gear 17 of No. 3 is fixed, and the planetary gear device 13 acts as a speed increasing device, so that the rotor shaft 7 is connected to the pulley 1.
2, it will rotate at a higher speed.

After step 8, the process advances to step 9, and in this step, flag F is set to 1. The next step after step 9 is a reset.

By executing the control routine as described above, when the engine speed is 8'O'Orpm or less and the voltage value of the field coil 8a is 0.4V or more, the rotor shaft 7 of the alternator 1 is rotated at an increased speed. On the other hand, when the engine speed is 8'0' Orpm or more, the rotor shaft 7 of the alternator 1 is directly driven.

10- Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of a power generating device for a vehicle with an internal combustion engine according to the present invention, FIG. 2 is an electric circuit diagram of the power generating device shown in FIG. 1, and FIG. FIG. 4 is a block diagram showing one embodiment of a control device for a power generation device, and FIG. 4 is a flowchart showing a control routine of the control device shown in FIG. 3. 1...A alternator, 2...housing, 3...
Stator core, 4...Stator 1 ile, 5.6...
·bearing. 7... Rotor shaft, 8... [! -ta, 8a... Field coil, 81)... Rotor core, 9... Brush, 10... Slip ring, 11... Bearing, 12
...Pulley, 13...Planetary gear device, 14...Key, 15...Sun gear. 16... One-way clutch, 17... Ring gear, 1
8... Planetary binion, 19... Electromagnetic brake, 20... Coil, 21... Core, 22... Brake disc, 23... Electric device case, 24...
Voltage regulator, 25...Microcomputer, 26...Rotational speed sensor, 27...Voltage sensor Special 6 Applicant: Toyota Motor Corporation Representative Patent attorney Masaki Akashi 531

Claims (1)

[Claims] An internal combustion engine comprising a generator, a transmission whose input member is drivingly connected to the internal combustion engine and whose output member is drivingly connected to the heavy electric machine input member, and a servo device that controls the gear ratio of the transmission. Power generation for locomotive vehicles @ installation.