JPH07269365A - Mechanical supercharger drive shock absorber control method and shock absorber - Google Patents

Abstract

PURPOSE:To reduce fluctuation torque to a mechanical supercharging and improve its durability by regulating degree of engagement of a clutch friction plate group provided on the outer circumference of a ring gear member with a clutch friction plate group of a planetary gear row in response to a rotational torque signal of the ring gear member. CONSTITUTION:A planetary gear row 20 is provided as a speed-increasing gear by connecting it to a gear train 10, which drives a cum, an injection pump and the like for the suction valve/exhaust valve of an internal combustion engine 1, and a mechanical supercharger 30 is connected to the planetary gear row 20. A ring side clutch plate 41 for a wet clutch 40 is secured to a ring gear 4 of the planetary gear row 20 and a case side clutch plate 42 is secured to a case 26 of the planetary gear row 20. By driving a piston 43 by pressure oil delivered from a pump 45 and the pressure regulated by a pressure regulating valve 44, the wet clutch 40 is caused to make connection/disconnection control and the pressure regulating valve 44 is controlled by a controller 28 so that the wet clutch 40 may become the required torque.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical supercharger drive shock absorber and a shock absorber control method, and more particularly to a mechanical supercharger which is driven by a gear train of an internal combustion engine and supercharges the internal combustion engine. TECHNICAL FIELD The present invention relates to a mechanical supercharger drive shock absorber and a shock absorber control method for reducing variable torque.

[0002]

2. Description of the Related Art Conventionally, a mechanical supercharger has been mounted on an internal combustion engine to increase the output, but especially when a mechanical supercharger is mounted on a medium or large diesel engine, the engine rotation is In contrast to the rated value of about 2000 rpm, the mechanical supercharger requires an input rotation speed of about 10,000 rpm. For this reason, a medium to large diesel engine requires a speed increasing device of about 5 times, and if this is performed by the belt system that has been applied to conventional gasoline engines,
A spur gear train 70 for doubling the speed and a belt 80 for accelerating the speed of 2.5 are used together 80 and the like. In addition, using a dry electromagnetic clutch to save fuel consumption with no engine load,
ON / OFF control of a mechanical supercharger is performed.

[0003]

However, when the conventional belt system is applied to medium and large diesel engines, a spur gear train for doubling the speed and a belt for accelerating the speed of 2.5 are used together. Etc. are required, and a large space is taken up, which is disadvantageous on a vehicle. FIG. 8 shows an example of the prior art, but it can be seen that an extremely large field is obtained by using the spur gear train and the speed increasing belt together. At the same time, medium- and large-sized diesel engines are required to have a longer life than gasoline engines. A conventional dry electromagnetic clutch used for ON-OFF control of a mechanical supercharger has a problem that durability is insufficient.

Focusing on the above-mentioned conventional problems, the present invention relates to a mechanical supercharger shock absorber control method and a drive shock absorber, and in particular, is driven by a gear train of an internal combustion engine,
An object of the present invention is to provide a mechanical supercharger shock absorber control method and a drive shock absorber that reduce fluctuation torque to a mechanical supercharger that supercharges an internal combustion engine to improve durability.

[0005]

In order to achieve the above object, according to the first aspect of the mechanical supercharger shock absorber control method and drive shock absorber of the present invention, cams for intake valves and exhaust valves of an internal combustion engine are provided. Alternatively, in a method of controlling a mechanical supercharger drive shock absorber using a mechanical supercharger driven by a gear train that drives an injection pump, etc., a clutch friction plate group and a planet provided on an outer peripheral portion of a ring gear member. It is characterized in that the degree of engagement of the gear train with the clutch friction plate group is adjusted in accordance with the rotational torque signal of the ring gear member.

According to a second aspect of the present invention, in a mechanical supercharger drive unit driven by a gear train for driving an intake valve / exhaust valve of an internal combustion engine, an injection pump, or the like, the mechanical supercharger drive unit is connected to the gear train. In addition, the planetary gear train that drives the mechanical supercharger to increase speed, the mechanical supercharger connected to the output shaft of the planetary gear train, and the gear train when the mechanical supercharger is being driven or stopped And a ring gear drive shock absorber attached to a planetary gear train ring gear that buffers fluctuation torque to the supercharger.

In a third aspect of the invention, which is mainly based on the second aspect, a ring gear drive shock absorber is attached to a wet clutch, a pressure adjusting valve for supplying and discharging pressure oil for clutch engagement and disengagement, and a gear train. It consists of a torque detection sensor that detects fluctuations in the machine and a control device that outputs a command to a pressure control valve that adjusts the pressure to the wet clutch by a signal from the sensor.

According to a fourth aspect of the invention, which is mainly based on the second aspect, the ring gear drive shock absorber is provided between a disc attached to the planet gear train ring gear and a disc fixed to the outside of the planet gear train ring gear. The inserted viscous material damps the fluctuating torque to the mechanical supercharger.

In the fifth aspect of the invention, a mechanical type supercharger is used which is supercharged to the internal combustion engine by being driven by a cam for intake / exhaust valves of the internal combustion engine or a gear train for driving an injection pump or the like. In a supercharger drive device, a mechanical supercharger that is connected to a gear train and is accelerated and driven by a planetary gear train, and a mechanical supercharger that drives and stops the mechanical supercharger A plate attached to the planetary gear train ring gear, a fixed plate fixed to the outside of the planetary gear train ring gear, and a magnetic field inserted between the plate and the fixed plate in order to buffer fluctuations to the supercharger. A material, a magnetic body that adjusts the viscosity of the magnetic material, a torque detection sensor that is attached to the gear train and that detects a change to the mechanical supercharger, and a control device that controls the strength of the magnetic body by a signal from the sensor Consists of.

[0010]

According to the above construction, the planetary gear train is used as the speed-increasing gear, and the mechanical supercharger drive shock absorber for disengaging and cushioning the ring gear is provided to turn on the mechanical supercharger. Since -OFF control and damping are performed, the planetary gear train saves space, and the shock absorber reduces torque that fluctuates, thereby extending the life of the mechanical supercharger and shock absorber. At this time, the shock force transmitted by the gears can be absorbed and damped by the slip of the shock absorber, and since the shock absorber is provided in the ring gear of the planetary gear train, it can be wide and large in the radial direction. The absorption and damping effect of the is increased, and at the same time, the durability can be enhanced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mechanical supercharger drive shock absorber and a shock absorber control method according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an overall system diagram of an embodiment of a mechanical supercharger drive shock absorber of the present invention. In FIG. 1, intake cam / exhaust valve cams of the internal combustion engine 1, or
Connected to the gear train 10 that drives the injection pump,
A planetary gear train 20 is arranged. A mechanical supercharger 30 is mounted on the planetary gear train 20 and is accelerated by the planetary gear train 20, so that the mechanical supercharger 30 supercharges intake air to the internal combustion engine 1. The gear train 10 is connected from a crank 11 via a plurality of gears 12, 13 and 14 to an input shaft 16 to a planetary gear train 20. The input shaft 16 is connected to the planetary carrier 21 of the planetary gear train 20.

The planetary gear train 20 includes a planetary carrier 21 connected to the input shaft 16, three planetary gears 22 normally attached to the planetary carrier 21 rotatably at equal intervals, and three planetary gears 22. The sun gear 23 meshes with the planetary gear 22 on the inner side, and the ring gear 24 meshes with the planetary gear 22 on the outer side of the three planetary gears 22. Sun gear 23
The output shaft 25 to the mechanical supercharger 30 is fixedly installed in the. A ring gear drive shock absorber 100, which will be described later, is attached to the ring gear 24.

Further, the torque sensor 2 is attached to the ring gear 24.
7, a control device 28 such as a controller is connected to the torque sensor 27. The mechanical supercharger 30 is provided with a pipe 4 from the air cleaner 3 and a pipe 4 for supplying a cylinder chamber (not shown) of the internal combustion engine 1 to clean intake air to the internal combustion engine 1 with the air cleaner 3. It is pressurized by the mechanical supercharger 30 and supplied to a cylinder chamber (not shown) of the internal combustion engine 1. In the following, in the drawings, only one half of the clutch is shown.

Next, an embodiment of the ring gear drive shock absorber 100 will be described. FIG. 1 shows a first embodiment of a ring gear drive shock absorber 100 using a wet clutch 40. The ring gear drive shock absorber 100 includes a wet clutch 40.
, Planetary gear train 20, pump 45, pressure regulating valve 44
And a torque sensor 27 and a control device 28. The wet clutch 40 includes a ring side clutch plate 41 fixed to the ring gear 24, a case side clutch plate 42 fixed to the case 26 of the planetary gear train 20, and a pump 4
And a piston 43 for pressing the ring side clutch plate 41 and receiving the oil from the pressure-adjusted valve 44.
The wet type clutch has the same structure and operation as a known clutch mechanism of a hydraulic automatic transmission, for example. The case side clutch plate (42) meshes with the case and moves axially, and the ring gear 24 meshes with the clutch plate. Ring side clutch plate (41). At this time, the pressure adjusting valve 44
Is connected to the control device 28 and performs a predetermined pressure adjustment according to a command from the control device 28.

Next, the operation of the predetermined pressure adjustment will be described with reference to the flow chart of FIG. In step 1, it is determined whether the wet clutch 40 is ON or OFF, and when it is ON, the process proceeds to step 2. If it is OFF, wait until it is ON. In step 2, the torque sensor 27 measures fluctuations in the minimum torque Tmin and the maximum torque Tmax of the drive torque (shown in FIG. 3) applied to the ring gear 24. In step 3, the control device 28 controls the torque sensor 27.
From the signals of the minimum torque Tmin and the maximum torque Tmax of the drive torque from, the minimum pressure Pmin at the minimum torque Tmin applied to the piston 43 pressing the ring side clutch plate 41 and the maximum pressure at the maximum torque Tmax are obtained. The pressure Pmax is calculated.

In step 4, the control device 28 determines from the obtained minimum pressure Pmin and maximum pressure Pmax,
It is smaller than the pressure applied to the piston 43 that presses the ring side clutch plate 41, that is, the pressure Pmax that transmits the drive peak torque Pmax, and the minimum drive torque Tmi.
A pressure Po higher than the pressure Pmin required for n is set. In step 5, the controller 28 causes the oil from the pump 45 to move to the required pressure Po in step 4, i.e. the wet clutch 40.
Outputs a command to the pressure regulating valve 44 so that the torque becomes the required torque To. In step 6, the pressure regulating valve 44 regulates the oil from the pump 45 to a predetermined required pressure Po according to a command. By repeating the above-mentioned steps, the torque having a fluctuation coming from the planetary carrier 21 is applied to the ring gear 24.
The variable torque is reduced while being absorbed by and transmitted to the sun gear 23 to reduce the variable torque applied to the mechanical supercharger 30. As a result, the wet clutch 40 and the mechanical supercharger 30
Improve the durability of.

Although the torque sensor 27 is attached to the ring gear 24 in the first embodiment, a torque sensor 29 is further added to the input shaft 16 to the planetary gear train 20 as shown in another embodiment of FIG. Attached to. In this case, the minimum pressure Pmin and the maximum pressure Pmax of the torque that fluctuates on the input shaft 16 are measured, the required pressure Po is calculated by the control device 28, and the pressure adjustment valve 44 is adjusted to adjust the pump 45. The oil from is adjusted to a predetermined required pressure Po. Further, the fluctuation of the torque absorbed by the torque sensor 27 may be confirmed to improve the adjustment accuracy of the pressure adjusting valve 44.

Next, FIG. 5 shows a second embodiment of the ring gear drive shock absorber 200 using the viscous fluid clutch 50. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The ring gear drive shock absorber 200 includes a viscous fluid clutch 50, a planetary gear train 20, and a pump 4
5, a pressure adjusting valve 44, a torque sensor 27, and a control device 28. The viscous fluid clutch 50 is
A ring-side disc 51 fixed to the ring gear 24, a case-side axially slidable disc 52 fixed to the case 26 of the planetary gear train 20, and a ring-side axially slidable disc. The pressure adjusting valve 44 regulates and receives the viscous material 53 such as silicone oil inserted between the disc 51 and the disc 52 on the case side, and the oil from the pump 45, and presses the plate 41 on the ring side. And a piston 43 for adjusting a clearance δ between the ring-side disc 51 and the case-side disc 52. At this time, the pressure adjusting valve 44 is connected to the control device 28 and performs a predetermined pressure adjustment according to a command from the control device 28.

Next, the operation will be described. The control device determines whether the viscous fluid clutch 50 is turned on or off. When it is OFF, the oil from the pump 45 is not regulated and returned to the tank 6 from a relief valve (not shown).
As a result, the piston 43 does not press the ring-side disc 51, the gap δ between the ring-side disc 51 and the case-side disc 52 is increased, and the viscous fluid clutch 50 is closed.
Set to FF. Next, when it is ON, as in the first embodiment, the torque sensor 27 measures the minimum pressure Pmin and the maximum pressure Pmax of the fluctuating torque applied to the ring gear 24, and the control device 28 requires the measurement. Pressure Po
Then, the pressure adjusting valve 44 is adjusted to regulate the oil from the pump 45 to a predetermined required pressure Po. As a result, the piston 43 presses the ring-side disk 51 to form a predetermined gap δ between the ring-side disk 51 and the case-side axially slidable disk 52, and the viscous fluid clutch 50 is formed. Is turned on, and the variable torque is transmitted to the sun gear 23 while the variable torque is absorbed by the ring gear 24 while being transmitted from the planetary carrier 21 to the sun gear 23.
Reduce the fluctuating torque. This improves the durability of the viscous fluid clutch 50 and the mechanical supercharger 30.

Next, FIG. 6 shows a third embodiment of the ring gear drive shock absorber 300 using the magnetic clutch 60. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The ring gear drive shock absorber 300 includes a magnetic clutch 60, a torque sensor 27, and a controller 28. The magnetic clutch 60 includes a ring side clutch plate 61 fixed to the ring gear 24, a case side fixing plate 62 fixed to the case 26 outside the planetary gear train 20, and a space between the plate and the fixing plate. It is composed of the inserted magnetic material 63, a magnetic coil 65 for adjusting the viscosity of the magnetic material 63 via the fixing plate 62, and a magnetic body 64. The magnetic body 64 adjusts the strength of the magnetic force according to a command from the control device 28 by the magnetic coil 65 connected to the control device 28.

Next, the operation will be described. Control device 2 whether the magnetic clutch 60 is turned on or off
The determination is made according to 8, and whether or not a magnetic force is generated in the magnetic body 64 is performed. When it is OFF, the control device 28 outputs a command that does not generate magnetic force in the magnetic body 64, does not generate magnetic force in the magnetic material 63, and the plate 61 on the ring side and the fixed plate 6 on the case side.
2 is idle. Next, when the ring gear 24 is turned on, the torque sensor 27 causes the ring gear 24 to rotate, as in the first embodiment.
The minimum pressure Pmin and the maximum pressure Pmax of the fluctuating torque applied to the magnetic body 64 are measured, the required magnetic force Mo is obtained by the control device 28, and the magnetic force of the magnetic body 64 is adjusted. As a result, a predetermined magnetic force is generated in the magnetic material 63 between the plate 61 on the ring side and the fixed plate 62 on the case side, the magnetic clutch 60 is turned on, and a variable torque from the planetary carrier 21 is applied to the ring gear 24. The variable torque is reduced while being absorbed by and transmitted to the sun gear 23 to reduce the variable torque applied to the mechanical supercharger 30.
This improves the durability of the magnetic clutch 60 and the mechanical supercharger 30.

[0022]

As described above, according to the present invention,
A planetary gear train is used as a speed-up gear, and a disengagement device is provided for the ring gear to enable ON-OF of a mechanical supercharger.
Since F control is performed, space is saved by the planetary gear train. FIG. 7 shows an example of the present invention, and it can be seen that the space is saved. Also, the impact force transmitted through the gear can be absorbed and attenuated by the slipping of the disengagement device, so the impact force can be absorbed,
The excellent effect that the damping effect is increased and the durability can be enhanced is obtained.

[Brief description of drawings]

FIG. 1 shows an overall system diagram of a first embodiment of a mechanical supercharger drive shock absorber of the present invention.

FIG. 2 shows a flow chart of the pressure regulating operation of the present invention.

FIG. 3 is a diagram showing variable torque for driving a mechanical supercharger.

FIG. 4 shows an overall system diagram of another embodiment of the first embodiment of the mechanical supercharger drive shock absorber of the present invention.

FIG. 5 is an overall system diagram of a second embodiment of a mechanical supercharger drive shock absorber of the present invention.

FIG. 6 shows an overall system diagram of a mechanical supercharger drive shock absorber according to a third embodiment of the present invention.

FIG. 7 shows a side view of the engine when the mechanical supercharger drive shock absorber of the present invention is mounted on the engine.

FIG. 8 is a side view of the engine when the conventional mechanical supercharger drive shock absorber is attached to the engine.

[Explanation of symbols]

1 ... Internal combustion engine, 10 ... Gear train, 20 ... Planetary gear train, 21 ... Planetary carrier, 22 ... Planetary gear, 23 ... Sun gear, 24 ... Ring gear, 2
7 ... Torque sensor, 28 ... Control device, 30 ... Mechanical supercharger, 40 ... Wet clutch, 41 ... Ring side clutch plate, 42 ... Case side clutch plate, 44 ... Pressure adjusting valve, 50 ... Viscous fluid clutch, 51 ... Ring side disc, 52 ... Case side disc, 53 ... Viscous material,
60 ... Magnetic clutch, 61 ... Ring side clutch plate, 62 ... Case side fixing plate, 63 ... Magnetic material, 64
...... Magnetic material, 100,200,300 …… Ring gear drive shock absorber.

Claims (5)

[Claims] 1. A method of controlling a mechanical supercharger drive shock absorber using a mechanical supercharger driven by a cam for an intake valve / exhaust valve of an internal combustion engine, or a gear train driving an injection pump or the like. In the mechanical supercharging, the degree of engagement between the clutch friction plate group provided on the outer peripheral portion of the ring gear member and the clutch friction plate group of the planetary gear train is adjusted according to the rotational torque signal of the ring gear member. Machine drive shock absorber control method. 2. A mechanical supercharger drive device driven by a gear train for driving an intake valve / exhaust valve of an internal combustion engine, an injection pump, or the like, which is connected to the gear train and is mechanical. A planetary gear train that drives the supercharger to speed up, a mechanical supercharger connected to the output shaft of the planetary gear train, and a mechanical supercharger that operates from the gear train when the mechanical supercharger is being driven or stopped. A ring gear drive shock absorber attached to a planetary gear train ring gear that buffers fluctuation torque to
A mechanical supercharger drive shock absorber, comprising: 3. A ring gear drive shock absorber, a wet clutch, a pressure adjusting valve for supplying / discharging pressure oil for attachment / detachment of the clutch, and a torque detection sensor attached to a gear train for detecting a change to a mechanical supercharger. 3. The mechanical supercharger drive shock absorber according to claim 2, further comprising: a control device that outputs a command to a pressure adjusting valve that adjusts the pressure to the wet clutch based on a signal from the sensor. 4. The viscous material according to claim 2, wherein the ring gear drive shock absorber is inserted between a disc attached to the planetary gear train ring gear and a disc fixed to the outside of the planetary gear train ring gear. The mechanical supercharger drive shock absorber that damps the fluctuation torque to the mechanical supercharger. 5. A mechanical supercharger using a mechanical supercharger for supercharging an internal combustion engine, driven by a cam for an intake valve / exhaust valve of an internal combustion engine, or a gear train for driving an injection pump or the like. In the drive device, a mechanical supercharger that is connected to the gear train and is accelerated and driven by the planetary gear train, and a mechanical supercharger that drives and stops the mechanical supercharger, and a mechanical supercharger from the gear train. A plate attached to the planetary gear train ring gear, a fixed plate fixed to the outside of the planetary gear train ring gear, and a magnetic material inserted between the plate and the fixed plate, It is composed of a magnetic body for adjusting the viscosity of the magnetic material, a torque detection sensor attached to the gear train for detecting a change to the mechanical supercharger, and a control device for controlling the strength of the magnetic body by a signal from the sensor. Mechanical turbocharger characterized by Drive shock absorber.