JPH0543241Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission device for a mechanical supercharger used in an internal combustion engine.

[Conventional technology]

In order to perform effective supercharging depending on the operating state of the internal combustion engine, a transmission device may be provided to change the rotation speed of the supercharger and the engine speed. For example, Akira Jitsukai
It is also known to connect a supercharger to an internal combustion engine via a fluid coupling and a continuously variable transmission, as described in Japanese Patent No. 59-165528. This publication discloses a turbo compound engine that combines an exhaust turbo supercharger and a mechanical supercharger, and this turbo compound engine connects the turbine shaft of the exhaust turbo supercharger to the internal combustion engine using a transmission mechanism. This transmission mechanism is connected to the crankshaft and is equipped with a continuously variable transmission consisting of a fluid coupling, a belt, and a pair of pulleys. The turbo compound engine described in the above-mentioned Japanese Utility Model Publication No. 59-165528 has an integrated and composite configuration of an exhaust turbo supercharger and a mechanical supercharger, so that it is mainly used in the low rotation speed region. It is used as a mechanical supercharger in the high rotation speed range, and is mainly used as an exhaust turbo supercharger in the high rotation speed range, thus providing effective supercharging over the entire range from low rotation speed to high rotation speed. It was made so that it could be done.

[Problem to be solved by the invention] However, although it may be preferable to incorporate a continuously variable transmission as described in the above-mentioned Japanese Utility Model Publication No. 59-165528 into a mechanical supercharger, it is difficult to actually incorporate a belt into a mechanical supercharger. When a continuously variable transmission using pulleys and pulleys is attached to a mechanical supercharger, a large space is required between the pulleys, making the device itself large and difficult to install in the engine. Furthermore, when the rotation becomes high, the belt slips, making it difficult to obtain the desired gear ratio. In view of these circumstances, the present invention aims to provide a mechanical supercharger with a multi-stage transmission.

[Means to solve the problem]

A mechanical supercharger transmission device according to the present invention includes a rotor rotatable within a housing for compressing air, a rotor shaft supporting the rotor, and an input shaft driven by an engine. The feeder includes first and second electromagnetic clutches having first and second engaging portions associated therewith, first and second one-way clutches, and a planetary gear mechanism, A first engaging portion of an electromagnetic clutch and the first one-way clutch are attached to the input shaft, and a sun gear of the planetary gear mechanism is attached to the first one-way clutch on the input shaft. At the same time, a first engaging portion of the second electromagnetic clutch is attached to the sun gear, and a second engaging portion of the first electromagnetic clutch is coupled to a carrier of a planetary gear of the planetary gear mechanism. A carrier of the planetary gear is further coupled to the second one-way clutch mounted on the rotor shaft, and a second engaging portion of the second electromagnetic clutch is mounted on the rotor shaft. be.

[Effect]

In the mechanical supercharger disguise device configured as described above, three speeds are achieved depending on the ON and OFF positions of the first and second electromagnetic clutches. First, in the low speed gear, the rotation of the input shaft is transmitted from the first one-way clutch to the rotor shaft via the carrier of the planetary gear of the planetary gear mechanism, and further via the second one-way clutch. In this case, deceleration is performed between the sun gear and the planetary gears in the planetary gear mechanism.
Next, in the middle speed gear (direct connection), the rotation of the input shaft is transmitted from the first one-way clutch to the rotor shaft via the sun gear of the planetary gear mechanism, and then via the second connected electromagnetic clutch. . And at high speed,
The rotation of the input shaft is transmitted from the first electromagnetic clutch to which the input shaft is connected, through the planetary gear and the sun gear of the planetary gear mechanism.
It is further transmitted to the rotor shaft via a second electromagnetic clutch. In this case, speed increases occur between the planetary gear and the sun gear in the planetary gear mechanism. More details will be described below with reference to FIGS. 3 to 5.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, the constituent members of the mechanical supercharger are shown in a simplified manner. Each component in FIG. 1 corresponds to, for example, a mechanical supercharger consisting of a Roots pump as shown in FIG. 2, and corresponding parts are designated by the same reference numerals.

Referring to FIG. 2, the mechanical supercharger 10 includes a housing 12, a pair of rotors 14 and 16 disposed within the housing 12, and rotor shafts 18 and 20 that support each rotor 14 and 16. In the Roots pump, each rotor 14, 16 has a bilobal cross section, and a hole 22 extending in the axial direction is formed in the longer diameter side. Both rotor shafts 18, 20
are rotatably supported by bearings 24 and 26, respectively, and can be rotated synchronously by meshing gears 28 and 30. Therefore, both rotors 14, 16 can rotate synchronously and perform a known pumping action.

The rotor shaft 20 shown at the bottom in FIG. 2 is adapted to receive driving force from an internal combustion engine. For this purpose, a pulley 32 is attached to the left end of the housing 12 on an extension of the rotor shaft 20. The pulley 32 is connected to a pulley (not shown) attached to the crankshaft of the internal combustion engine by a timing belt (not shown), and is driven by the output of the internal combustion engine. Pulley 32
is attached to an input shaft 34, which is rotatably supported within the housing 12 by a bearing (not shown). The rotor shaft 20 is connected to an input shaft 34 via a transmission 36.

Referring to FIG. 1, the transmission 36 includes first and second multi-plate electromagnetic clutches 38, 40, first and second one-way clutches 42, 44, and a planetary gear set 46. The first electromagnetic clutch 38 has a first engaging part 38a and a second engaging part 38b which are arranged opposite to each other with a minute interval and can engage with each other. It has a first engaging part 40a and a second engaging part 40b. The planetary gear mechanism 46 includes a sun gear 48, a planetary gear 50,
The planetary gear 50 is attached to a carrier 54 and can revolve around the sun gear 48. Ring gear 52 is fixed to housing 12.

A first engaging portion 38a of the first electromagnetic clutch 38 and a first directional clutch 42 are attached to the input shaft 34. A sun gear 48 of a planetary gear mechanism 46 is attached to a first one-way clutch 42 attached to this input shaft 34.
8, the first engaging portion 40a of the second electromagnetic clutch 40;
is installed. Further, the second engaging portion 38b of the first electromagnetic clutch 38 is connected to the carrier 54 of the planetary gear 50 of the planetary gear mechanism 46, and the carrier 54 of the planetary gear 50 is further connected to the second engaging portion 38b of the planetary gear 50 attached to the rotor shaft 20. It is connected to a one-way clutch 44. The second engaging portion 40b of the second electromagnetic clutch 40 is also attached to the rotor shaft 20.

Next, we will explain the operation of the above embodiment in Figures 3 to 5.
This will be explained with reference to the figures.

The first and second electromagnetic clutches 38, 40 are turned on and off by a control device (not shown) depending on the operating state of the internal combustion engine, and achieve three speeds depending on their positions.

FIG. 3 shows, for example, a case where a low speed gear is used when the engine is idling, and the rotation transmission path is indicated by an arrow. In this case, both the first electromagnetic clutch 38 and the second electromagnetic clutch 40 are turned off, and the rotation of the input shaft 34 is transferred from the first one-way clutch 42 to the sun gear 48, planet gear 50, and carrier of the planetary gear set 46. 54, the second one-way clutch 4
4 to the rotor shaft 20. In this case, deceleration occurs between the sun gear 48 and the planetary gears 50.

FIG. 4 shows a case where the middle speed gear (direct connection) is used, for example, when the engine load is low to medium load, which is lower than a predetermined value, and the rotation transmission path is similarly shown by an arrow.
In this case, the first electromagnetic clutch 38 is turned off and the second electromagnetic clutch 40 is turned on. Then, the rotation of the input shaft 34 is transmitted from the first one-way clutch 42 through the sun gear 48 of the planetary gear mechanism 46, and then to the second electromagnetic clutch 40.
is transmitted to the rotor shaft 20 via. in this case,
The second one-way clutch 44 idles relative to the rotor shaft 20.

FIG. 5 shows, for example, a case where the speed increasing stage is used when the engine load is higher than a predetermined value, and the rotation transmission path is similarly shown by arrows. In this case, both the first electromagnetic clutch 38 and the second electromagnetic clutch 40 are turned on. Then input shaft 3
4 is transmitted from the first electromagnetic clutch 38 to the rotor shaft 20 via the carrier 54, the planetary gear 50, the sun gear 48, and the second electromagnetic clutch 40. In this case, an increase in speed occurs between the planetary gear 50 and the sun gear 48 in the planetary gear mechanism 46, and the first one-way clutch 42 idles relative to the input shaft 34.

[Effect of idea]

As explained above, according to the present invention, a transmission is constructed compactly from the first and second electromagnetic clutches, the first and second one-way clutches, and the planetary gear mechanism, and the transmission is mechanically constructed. It can be incorporated into a turbocharger and the mechanical turbocharger can be controlled at multiple speeds, so it satisfies a variety of supercharging requirements, including low supercharging at low engine loads and high supercharging at high engine loads. can do.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing a transmission of a mechanical supercharger according to the present invention, Fig. 2 is a sectional view showing an example of the detailed structure of the mechanical supercharger shown in Fig. 1. FIG. 4 is a diagram illustrating the device shown in FIG. 1 when it is directly connected. FIG. 5 is a diagram illustrating the device shown in FIG. 1 when it is speeding up. 10...Supercharger housing, 14,16...Rotor, 18,20...Rotor shaft, 34...Input shaft, 36...Transmission device, 38,40...Electromagnetic clutch, 42,44...One direction Kuratsuchi, 48...
Sun gear, 50... Planet gear, 52... Ring gear, 54... Carrier.

Claims (1)

[Scope of utility model registration request] A mechanical supercharger having a rotor rotatable within a housing for compressing air, a rotor shaft supporting the rotor, and an input shaft driven by an engine, each having first and second associated first and second electromagnetic clutches having engaging portions;
first and second one-way clutches and a planetary gear mechanism, the first engaging portion of the first electromagnetic clutch and the first one-way clutch being attached to the input shaft; A sun gear of the planetary gear mechanism is attached to the upper first one-way clutch, a first engaging portion of the second electromagnetic clutch is attached to the sun gear, and a planet gear of the planetary gear mechanism is attached to the first engaging portion of the second electromagnetic clutch. The second engaging portion of the first electromagnetic clutch is connected to the carrier of the planetary gear, and the carrier of the planetary gear is further connected to the second one-way clutch attached to the rotor shaft. A transmission for a mechanical supercharger, characterized in that a second engaging portion of the clutch is attached to the rotor shaft.