JPH02185625A - Supercharger - Google Patents

Abstract

PURPOSE:To economize the consumption of electric power at the time of ON/ OFF operation of a clutch by providing the clutch actuated by hydraulic pressure of an engine at a power transmission part to a supercharger. CONSTITUTION:A clutch 5 which is actuated by hydraulic pressure of an engine 1 is provided at a power transmission part 4, in a supercharger 3 to which motive power is transmitted from an output shaft of an engine 1. Since hydraulic pressure is generated at all times when the engine 1 is operated, the hydraulic pressure is led to the clutch 5 by controlling a control valve 50 by a control device 52. As a result, since the supercharger 3 can be actuated ON/OFF by obtaining a necessary torque directly, large electric power is not expended. Therefore power feed to other auxiliary units is not prevented and decrease in supply voltage to other electronic equipments is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a so-called mechanical supercharger that supercharges an engine by directly transmitting power from the output shaft of the engine.

(Prior technology) A supercharger that directly circulates part of the engine's output to drive a compressor to perform supercharging has no time lag at low speeds compared to so-called exhaust turbo supercharging that uses exhaust energy. Although it has the advantage of increasing engine output, on the other hand, it has the disadvantage of decreasing durability due to excessive output at high speeds. For this reason, conventionally, an electromagnetic clutch has been used to turn on the supercharger at low speeds and turn it off at high speeds to improve output at low speeds and meet the demand for quick response (
(Refer to Service Bulletin No. 601, issued by Nissan Motor Co., Ltd., August 1988).

(Problem to be solved by the invention) However, since the conventional RANO uses an electromagnetic horn as a power source for the on-off clutch, the electric power becomes too large in relation to the drive torque of supercharging, which causes the engine to generate electricity. There was a problem in that it caused a lack of capacity and put pressure on the power supply to other auxiliary machines.

This invention focuses on the pressure of engine lubricating oil, which is constantly present during engine operation, and attempts to solve the above-mentioned problems by utilizing this oil pressure.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a supercharger to which power is transmitted through the output shaft J of the engine, in which the power transmission section is connected to the engine. It is equipped with a clutch that is operated by hydraulic pressure.

(Function) Since oil pressure is always generated while the engine is running, by directing that oil pressure, the necessary torque can be directly obtained and the supercharger can be turned on. At this time, since a large amount of power is not consumed, the power supply to other auxiliary equipment is not obstructed, and the supply voltage to other electronic devices does not decrease.

(Example) An example of the present invention will be described below with reference to FIG. First, the configuration will be explained.

In FIG. 1, 1 is an engine, 2 is an output shaft, 3 is a supercharger, 4 is a power transmission section, and 5 is a clutch. Supercharger 3
is of a mixed flow compression type, and when the impeller 6 rotates, it sucks air from the suction lower and sends compressed air to the suction pipe 9 of the engine 1 via the scroll 8. The shaft 10 of the impeller 6 is such that the thick Ill gear at the left end meshes with each planetary gear 13 supported by the shaft 12 in the case 11.
This shaft 10 is supported in a self-centering manner inside a case 11 by four seals/bearings 14 arranged in the axial direction. The case 11 and the case 15 of the scroll 8 are integrally fastened to the transmission part case 16 with bolts 17.

At the upper left side of the transmission case 16, a shaft 19 having a pulley 18 splined to the left end is rotatably supported by pawl bearings 20 and 21. A left pulley piece 22 is fixed to an intermediate portion of the shaft 19 in the case 16 with a bolt 24, and a right pulley piece 23 is splined to be movable in the axial direction. Between the movable pulley piece 23 and the splash plate 26 is a spring 25 that pushes the pulley piece 23 to the left.
It is equipped with The pulley 18 is connected to the output shaft 2 of the engine 1 by a toothed belt (not shown).

The aforementioned planetary gear 13 is located at the lower left side of the transmission case 16.
The intermediate shaft 27 having an internal gear that meshes with the ball bearing 28
．． It is rotatably supported at 29. A hollow shaft 31 is supported on the intermediate shaft 27 via a needle roller bearing 30 so as to be relatively rotatable and fixed in the axial direction.
1, the right end forms the pulley piece 32. The left pulley piece 33 facing the right pulley piece 32 is relatively 111
! 4 are recessed into the intermediate shaft 31 for easy access. This pulley piece 33 has a spline 34 on the hollow shaft 31.
A fly ball 37 is housed between the fly ball 37 and a disk 36 which is fixed with a snap ring 35, and the ball 37 moves to the right by the centrifugal force of the ball 37, thereby narrowing the distance between the opposing pulleys.

Further, the right pulley piece 32 has a ring-shaped friction plate 38 with a tapered inner surface on the inside of the right end, and constitutes a part of the clutch 5. A V-belt 54 is stretched between the upper pulley piece 22.23 and the lower pulley piece 32.33. The clutch 5 includes a cylindrical disk body 39 with a tapered outer surface that contacts the inner surface of the friction plate 38 like a brake drum, and a disk-shaped piston 41 that contacts this via a thrust needle roller bearing 40.

The inner and outer circumferences of the piston 41 are closed by seals 42a and 42b to form a hydraulic chamber 43 between the piston 41 and the case 16.

The cylindrical disk body 39 is spline-coupled to the hub 45 so as to be movable in the axial direction, and is urged rightward by a spring 46 fixed at the left end. The hub 45 is fixedly splined to the intermediate shaft 27.

In the hydraulic chamber 43, the regulated hydraulic pressure (for example, 3 sl/, ht) from the oil gear gallery 47 of the engine 1 is stored in a passage 51 via a check valve 48, a pressure accumulator 49, and a control valve 50. 50 is actuated by a signal to a control unit 52 such as a microcomputer (CPU), and when the engine speed is low, the oil pressure is sent as is, and when the engine is high speed, it is bypassed and released to the engine oil pan 53.

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

When the engine 1 is at low speed, the signal is transmitted to the control device 5.
2, the control device M52 gives a command to the control valve 50 and directly applies the hydraulic pressure in the pressure accumulator 49 to the hydraulic chamber 43 via the passage 51. Therefore, the piston 41 moves to the left and pushes the cylindrical disc body 39 to the left through the roller bearing 40, bringing it into contact with the friction plate 38 in a cone shape. As a result, the pulley piece 32 is integrated with the friction plate 38, the cylindrical disc body 39, the hub 45 spline-coupled thereto, and the intermediate shaft 27 spline-coupled therewith.

Therefore, the output of the engine output shaft 2 is generated by the pulley 18 and the shaft 19.
, boob pieces 22, 23, ■belt 54, boob piece 33,
32, the cylindrical disc body 39, the hub 45, the intermediate shaft 27, the planetary gear 13, the shaft 10, and the impeller 6. The impeller 6 sucks air from the intake lower, compresses it, and supercharges it to the engine intake pipe 9 via the scroll 8.

When the engine rotation increases, the rotation of the bobbin piece 33 and the disk 36 also increases, and due to the centrifugal action of the fly ball 37 inside, the pulley piece 33 moves to the right and narrows the distance from the pulley piece 32. As a result, the upper and lower boolean ratio increases, which slows down the intermediate shaft 27 and the impeller 6, thereby preventing an excessive increase in supercharging pressure.

When the engine 1 is at high speed, the control device 52 controls the control valve 5
0, the hydraulic pressure is bypassed and released to the oil pan 53. As a result, the boom piece 32 is disconnected from the cylindrical disc body 39, and idles together with the boom piece 33 with respect to the intermediate shaft 27, thereby stopping supercharging.

Next, another embodiment will be explained with reference to FIG. This is J1 like the brake drum of the previous example! The m-contact was replaced with a multi-plate *friction contact. A spline is cut on the inner surface of the pulley piece 32a, and a spline is cut on the outer surface of the hub 45a, and a large friction disk 39a and a small R are sequentially connected to these splines.
A plurality of (approximately six) FM discs 38a are provided. As in the previous embodiment, the piston 41 moves to the left by the hydraulic pressure in the hydraulic chamber 43, and the rIJla disks 39a and 38
a one after another, and the pulley piece 32a and the intermediate shaft 27 are integrated through the splines of the inner and outer diameters by their Fll friction force, or vice versa to separate them,
It performs a clutch action.

As described above, since the on/off power of the power transmission clutch according to the present invention uses the engine oil pressure during operation, it does not have any effect on the use of electric power for driving other sacred treasures.

[Effects of the Invention] In a supercharger to which power is transmitted from the output shaft of an engine, the power transmission section is provided with a clutch that is operated by the oil pressure of the engine, so that when the clutch is turned on and off, This has the effect that it does not consume a large amount of power, does not interfere with the power supply to other sacred treasures, and does not cause a drop in the supply layer.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the invention, and FIG. 2 is a cross-sectional view showing essential parts of another embodiment. Explanation of symbols appearing in drawings

Claims (1)

[Claims] 1. A supercharger to which power is transmitted from an output shaft of an engine, characterized in that the power transmission portion is provided with a clutch operated by hydraulic pressure of the engine.