JPS63259124A - Auxiliary machine driving device for engine - Google Patents

Abstract

PURPOSE:To make a power transmitting mechanism compact by connecting an intake pipe control valve synchronously operating with an engine to another engine auxiliary machine through gears, and driving these accessories through a common pulley by engine power. CONSTITUTION:A rotary valve 2 as an intake pipe control valve (engine auxilia ry machine) synchronously operating with a rotary piston engine 1 is mounted in an intake manifold 11 located in parallel to a crankshaft 7. Opposite ends of the intake manifold 11 are fixed to a front cover 5 and a rear cover 6 pro vided on front and rear surfaces of the engine 1. An alternator 3 and an air pump 4 as other engine auxiliary machines are mounted to the covers 5 and 6, and rotating shafts 23 and 26 of these auxiliary machines are operatively connected through gear trains 17, 25 and 18, 28 to rotating shafts 13 and 14 of the rotary valve 2, respectively. A pulley 20 is fixed to an end of the rotating shaft 13, and is operatively connected through a belt 21 to a timing pulley 9 mounted on the crankshaft 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine auxiliary part a device, and particularly to a power transmission mechanism to the engine auxiliary equipment.

(Prior Art) Generally, engines in various types of automobiles are provided with a plurality of engine auxiliary devices such as alternators and power steering pumps that are driven using the driving force of the engine.

On the other hand, in recent years, automobile engines have been equipped with superchargers for purposes such as improving output, and air pumps and the like for supercharging have been added.

For example, in Japanese Patent Application Laid-Open No. 58-211529, an engine is provided with a turbo supercharger and a mechanical supercharger (air pump), and the mechanical supercharger is driven and connected by the engine via a belt transmission mechanism. However, while the mechanical supercharger is operated in the engine's medium and low speed range to perform mechanical supercharging,
One example is one that can be switched to a turbo supercharger to perform turbo supercharging in the high speed range of the engine.

(Problem that the invention aims to solve) However, if the engine is equipped with a supercharger and the supercharging air pump, etc. is driven by engine power, the number of engine auxiliary machines increases, so the power transmission mechanism becomes complicated,
Each engine accessory is subject to layout constraints. For this reason, for example, it was necessary to place the power steering pump above the air pump, connect the drive shafts of both pumps with a belt transmission mechanism, etc., and drive the power steering pump through the air pump being driven by the engine. .

However, with this layout of engine auxiliary equipment, the number of belt transmission mechanisms increases, making it difficult to adjust the belt tension. ! The problem was that it not only became large, but also large.

In particular, passenger cars are required to have a low bonnet design, making it difficult to layout engine auxiliary equipment.For example, the power steering pump must be separated from the engine and rely on an electric motor.

In addition, in rotary piston engines, the T of the supercharger
If you try to equip an rSC (partial supercharging) system, compared to a reciprocating engine, a rotary valve and air pump will be added as intake pipe control valves, which will further increase the number of engine accessories and require a uniform layout. He had kidney problems.

Therefore, the object of the present invention is to transmit power to the intake pipe control valve synchronized with the engine and other engine auxiliary equipment, and to drive these by the engine power via a common pulley. The object of the present invention is to make the power transmission 3i mechanism more compact and to increase the degree of freedom in the layout of engine auxiliary equipment.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention targets an engine accessory drive device that transmits engine power to an engine accessory and drives the accessory. do.

First, a gear transmission means having a common pulley is provided, and the gear transmission means and the crankshaft of the engine are drivingly connected via the cough pulley. At least the rotating shaft of the intake pipe 11i control valve, which is the same length as the engine, and the rotating shaft of other engine accessories are drivingly connected to the gear transmission means, and these engine accessories are connected to the common engine.

It is configured to be driven by the power of the engine via the pulley.

(Function) With the above configuration, in the present invention, the rotation of the crankshaft of the engine causes the common pulley to rotate, thereby driving the gear transmission means. The rotating shaft of the intake pipe control valve rotates in synchronization with the engine through the drive of the gear transmission means, and the intake pipe control valve is driven in synchronization with the engine. The rotating shaft of the engine auxiliary machine rotates and drives other engine auxiliary machines. Therefore, each of these engine accessories can be effectively driven by the power of the engine via a gear transmission means having a common pulley.

Moreover, since the power transmission means is composed of gears and the gap pulley is common, belt tension adjustment is easy.
In addition to being simple and easy to use, the structure can be made more compact, and the bonnet of the car body can be lowered.

In addition, in the gear transmission means, the rotation shaft of another engine auxiliary machine is connected via the rotation shaft of the intake pipe control valve located at the upper part of the engine or the countershaft that controls the timing of the control valve. engine accessories can be laid out using the space above the engine,
It is possible to increase the degree of freedom in layout.

Furthermore, in this case, if the rotation shaft of another engine auxiliary machine is connected via the rotation shaft of the intake pipe control valve, when the other auxiliary machine is replaced,
Since the intake pipe control valve can be replaced without removing it, the replacement work can be improved. Moreover, especially by selecting an air pump as another engine auxiliary device, the supercharger can be advantageously equipped with a Tl5O system.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 illustrates a first embodiment of the present invention, in which 1 is a rotary piston engine, 2 is a rotary valve constituting an intake pipe control valve that operates synchronously with the engine 1 as an engine auxiliary machine, and 3 and 4 are other components, respectively. The alternator and supercharging air pump are engine auxiliary equipment, and each is driven by gear transmission means A! ll are connected. Further, a front cover 5 is disposed on the front surface of the engine 1, and a carrier cover 6 is disposed on the rear surface, each having a substantially C-shaped cross section.

On the other hand, 7 is a crankshaft of the engine 1, and the crankshaft 7 extends forward, passes through the inside of the front cover 5, and the lyI end protrudes to the front of the cover 5.
It is rotatably supported by the cover 5 via a bearing 8. A timing pulley and another power transmission pulley 10 are sequentially fitted and fixed to the front end of the crank@7.

Further, the rotary valve 2 includes a shaft-shaped valve body 12 that is housed in a cylindrical intake manifold 11 disposed above the engine 1 in parallel with the crankshaft 7 . The intake manifold 11 has its front and rear peripheral edges fixed to and supported by the front cover 5 and rear cover 6, respectively. On the other hand, the valve body 12
Rotating shafts 13, 14 are coaxially protruded from the front and rear ends of the intake manifold 11, respectively, and both the rotating shafts 13, 14 are rotatably fitted to both the front and rear ends of the intake manifold 11 via bearings 15, 16... The valve body 12 is supported. The two rotating shafts 13 and 14 protrude into the front cover 5 and rear cover 6, respectively, and the two force bars 5,
Transmission gears 17, 18 are fitted and fixed within 6. Further, the front end of the rotating shaft 13 passes through the cover 5 and projects forward of the cover 5, and a bearing 19
It is rotatably supported by the cover 5 via.

A timing target pulley 20 that pairs with the timing pulley 9 is fitted and fixed to the front end of the rotating shaft 13, and a timing belt 21 is wound around both pulleys 9 and 20 to drive both pulleys 9 and 20. connected. In addition, 22
is a timing cover that covers the belt 21 and is attached to the front surface of the front cover 5.

On the other hand, Joro? The alternator 3 and the air pump 4 are arranged at both rear ends of the rotary valve 2 by utilizing the upper space of the engine 1 above the L rotary valve 2. The rotating shaft 23 of the alternator 3 is arranged parallel to the rotating shaft 13 of the rotary valve 2, and the tip thereof is introduced into the cover 5 by penetrating the back surface of the front cover 5. 5 via a bearing 24 so as to be rotatable. A transmitted gear 25 that meshes with the transmission gear 17 is fitted and fixed to the tip of the rotating shaft 23 of the alternator 3,
Therefore, the rotation shaft 23 of the alternator 3 and the rotation shaft 13 of the rotary valve 2 are drivingly connected.

On the other hand, the rotary shaft 26 of the air pump 4 is provided parallel to the rotary shaft 14 of the rotary valve 2, and the tip thereof is introduced into the cover 6 by passing through the front surface of the rear cover 6. It is rotatably supported via 27.

Further, at the tip of the rotating shaft 26 of the air pump 4, there is a transmitted gear 28 that meshes with the transmission gear 18 of the rotary valve 2.
are fitted and fixed, so that the rotating shaft 26 of the air pump 4 and the rotating shaft 14 of the rotary valve 2 are drivingly connected. A gear transmission means A is constituted by each of the gears 17, 18, 25, 28, the rotating shaft 13, 14 of the rotary valve 2, and the timing pulley 2o of the valve 2,
The rotary valve 2, alternator 3, and air pump 4 are each driven by the power of the engine 1 via the common timing pulley 20.

In addition, 29 is a rotating shaft of an oil pump (not shown), and a chain 3o is wound between the crank and the shaft 7 to drive it! lI
They are connected to each other and supply lubricating oil to the main body of the engine 1, the rotary valve 2, etc.

Next, power transmission of the engine 1 will be explained.

First, when the crankshaft 7 of the engine 1 is rotated, the rotary valve 20 rotation shaft 13,14 rotates via the timing pulley 20 which is drivingly connected to the timing pulley 9, and the rotary valve 2 is driven. By rotating 13 and 14, both rotating shafts 13.1
The rotating shaft 23 of the alternator 3 and the rotating shaft 26 of the air pump 4, which are drive-connected to the air pump 4 by gears, respectively, rotate, and both auxiliary machines 3.4 are driven.

Therefore, according to this embodiment, the rotary valve 2, alternator 3, and air pump 4, which are engine accessories, are effectively driven by the power of the engine 1 through the gear transmission means A having one common timing pulley 20. This makes it possible to easily adjust the tension of the belt with just one adjustment, and the structure can be made more compact, allowing for a lower bonnet of the vehicle body. Also, the rotating shaft 13 of the rotary valve 2 disposed at the top of the engine 1.
The rotating shaft 23 of the alternator 3 and the rotating shaft of the air pump 4 are connected to the rotating shaft 14, respectively, and the alternator 3 and the air pump 4 are arranged by effectively utilizing the upper space of the engine 1 above the rotary valve 2. You can increase your degree of freedom. Furthermore, in this case, since the rotating shafts 23, 26 of the alternator 3 and the air pump 4 are connected via the rotating shaft 13, 14 of the rotary valve 2, the alternator 3 and the air pump 4 can be replaced without removing the rotary valve 2. , can improve replacement work efficiency. In particular, since the rotary valve 2 and the air pump 4 are selected as engine auxiliary equipment, the equipment of the Tl5C system in the supercharger can be used. Further, since the gear transmission means Δ is housed in the front cover 5 and rear cover 6 of the engine 1, the gear transmission means Δ can be lubricated with oil by the oil pump in the same way as the engine 1 and the rotary valve 2. .

FIG. 2 shows a second embodiment, in which the rotary shafts 13 and 14 of the rotary valve 2 in the first embodiment are connected to gear transmission means A.
Instead of the gear transmission means A having a counter shaft 31 and two gears 35 and 36, the rotary valve 2 and the air pump 4 are connected via the shaft 31.
and a power steering pump 32. Hereinafter, the same parts as in the first embodiment will be explained using the same reference numerals. Note that a power steering pump 32 of the power steering mechanism is arranged in place of the alternator 3 of the first embodiment.

The countershaft 31 is connected to the power steering pump 32. It is provided between the air pump 4 and the rotary valve 2 in parallel to the crankshaft 7. Both ends of the countershaft 31 are introduced into the front cover 5 and the rear cover 6, respectively, and are fitted with bearings 33.3.
4 and is rotatably supported by the double sword bar 5.6. Furthermore, the front end of the countershaft 31 protrudes from the front of the front cover 5, and the front end of the countershaft 31 protrudes from the front of the front cover 5, and the bearing 19°19.
It is rotatably supported via... A timing target pulley 2o is fitted into the front end of the shaft 31 within the timing cover 22, and the timing pulley 9 and the timing target pulley 2o are connected to the timing belt 2.
1 indicates the drive speed. Further, the shaft 31 is fitted with a transmission gear 17.18 within the covers 5, 6, and the transmitted gear 25 of each rotating shaft 23.26 of the power steering pump 32 and the air pump 4 is fitted into the transmission gear 17.18. .28 are engaged and the countershaft 31
, a power steering pump 32, and an air pump 4 are drivingly connected to each other.

Further, a timing gear 35 is fitted to the countershaft 31 behind the transmission gear 17 fitted inside the front cover 5 and arranged in parallel therewith. The timing gear 3 is connected to the rotating shaft 13 of the rotary valve 2.
A timing gear 36 that meshes with the counter shaft 31 and the rotation shaft 1 of the rotary valve 2 is fitted.
3 are drivingly connected.

Therefore, the rotation of the timing pulley 9 of the crankshaft 7 rotates the countershaft 31 via the timing target pulley 20, and further drives the rotary valve 2 via the timing gear 35 and the timing target gear 36. The power steering pump 32 and the air pump 4 are driven via the power steering pump 32 and the transmitted gears 25 and 28.

Therefore, according to this second embodiment, the rotary valve 2
Since the timing belt 21 is driven via the countershaft 31, the tension caused by the timing belt 21 is stopped by the countershaft 31 and does not directly act on the valve body 12 of the rotary valve 2. The sliding stress on the intake manifold 11 is effectively reduced, and the rotary valve 2 can be driven with high precision for a long period of time. Furthermore, the rotation of the crankshaft 7 is controlled by each timing pulley 9, 20 and timing gear 35,
The rotary shaft 13 of the rotary valve 2 is
Therefore, the radius of each of the pulleys 9, 20 and the timing gears 35, 36 can be made smaller than those of the first embodiment, making it possible to further reduce the size.

Note that other engine auxiliary equipment is not limited to this embodiment, and may be applied to an air conditioner compressor or the like.

<Effects of the Invention> As described above, according to the present invention, the gear transmission means having a common pulley is drivingly connected to the engine shaft via the pulley, and the intake pipe control valve and the intake pipe control valve are connected via the gear transmission means. Since it can drive other engine auxiliary equipment, the intake pipe control valve and other engine auxiliary equipment can all be effectively driven by engine power, and since there is only one pulley, tension adjustment is also easy. At the same time, the 1fli structure can be made more compact, and the bonnet of the car body can be lowered.

In addition, by connecting the rotating shaft of other engine auxiliary equipment via the rotating shaft of the intake pipe control valve disposed at the top of the engine or a countershaft that ties the control valve, other engine auxiliary equipment can be connected. The engine can be effectively laid out using the space above the engine, increasing the degree of freedom in layout, and the intake pipe control valve can be replaced without removing the intake pipe control valve when replacing other engine accessories. The replacement work efficiency can be improved.

In particular, by arranging the air pump as another engine auxiliary device, the Tl5C system can be advantageously installed, which is an excellent effect.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention; FIG. 1 is a cross-sectional view of the main structure of the first embodiment, and FIG. 2 is a cross-sectional view of the main structure of the second embodiment. A... Connection means, 1... Engine, 2... Rotary valve, 3... Alternator, 4... Air pump, 7... Crankshaft, 17.18-... Transmission gear,
2o... Timing pulley, 23.26... Rotating shaft, 25°28... Transmitted gear, 31... Counter shaft, 32... Power steering pump, 3
5...Timing gear, 36...Timing target gear. Patent applicant: Mazda Motor Corporation, 7. .

Claims (1)

[Claims] (1) An engine accessory drive device that transmits engine power to an engine accessory to drive the accessory, in which a gear transmission means having a common pulley on the engine crankshaft is driven via the pulley. At least the rotating shaft of an intake pipe control valve that rotates synchronously with the engine and the rotating shaft of other engine auxiliary equipment are drivingly connected to the gear transmission means, and each of the engine auxiliary equipment uses the common pulley. An engine auxiliary drive device characterized in that it is driven by the power of the engine through the engine.