FR2712924A1 - Internal combustion engine device actuation mechanism. - Google Patents

Abstract

The present invention relates to a mechanism for actuating an internal combustion engine device (15) having a throttle cable (26). The device (15) comprises a rotor (123) angularly movable in response to the movement of the throttle cable (26) to actuate the device, and a lost motion mechanism (128, 130) intended to drive the rotor crazy on a part of the course of its angular displacement when the device is actuated.

Description

1 2712924

  The present invention relates to a mechanism intended to actuate a device located in an internal combustion engine, and more particularly to a mechanism intended to actuate an exhaust valve, a carburetor valve, or an oil pump situated in an internal combustion engine. internal combustion such as a two-stroke engine to completely burn the air-fuel mixture existing in a combustion chamber while preventing reflux when the engine is operated under low

charge, for example.

  Until now, it has been customary to use

  be an electric motor to control independently

  during the amplitude of the opening of an exhaust valve

  engine exhaust valve

  two stages to burn the air mixture completely

  fuel existing in a combustion chamber while preventing back flow when the engine is operated under

low load.

  We know how to give exhaust valves

  predetermined valve opening characteristics using an actuator assembly which is arranged

  in a throttle body (see the publication of the

  Japanese utility model pending N 50-153 306, for example). This publication describes a motorcycle having a carburetor valve or a carburetor butterfly valve and an exhaust valve. The carburetor valve is

  actuated by a first cable reel, via the

  cable, and the exhaust valve is activated

  operated by a second reel of cable, through

  diary of a cable. These first and second coils of cable

  ble are received in a housing positioned adjacent to the

  throttle, and can be rotated when

  the throttle grip is turned by the driver of the

  motorcycle. The housing which receives the first and the second

  conde reels of cable is generally called

throttle body.

  According to the publication cited above, since the second cable reel is moved in unison with the first cable reel, which is associated with the carburetor valve, the first cable reel is subjected at all times to the load from of the second cable reel. Therefore when the first cable reel is brought back quickly, the second cable reel is

  also rotated in unison with the first bo-

  cable bin. Depending on the exhaust pressure acting on the exhaust valve, the second cable reel can adversely affect the return movement of the first cable reel i.e.

  rapid movement of the carburetor valve towards its po-

closed sition.

  In the publication above, the housing

  butterfly is associated with the right handle of the handlebars

  rection. The first and second cable reels are positioned as a larger diameter reel and

  smaller diameter coil in the package housing

  pillon, which also receives springs and fingers. As a result, the throttle body receives a mechanism

  very complex. This is because the fuel valve

  rator and the exhaust valve are open and closed

  according to different specifications.

  Motorcycles, especially small scooters, have small size handlebars. Due to the fact that various switches are arranged on the handlebars close to the throttle grip, it is very difficult to fix, on the handlebars, a large, complex throttle body, which receives the first and second coils

of cable.

  The usual arrangement which uses an electric motor to control the exhaust valve has a

  complex structure and is very expensive because it does not

  various additional mechanical and electrical components. According to the structure shown in the above-mentioned publication, since various components must be received in the throttle body, there is no freedom of arrangement available for the mechanisms in the throttle body. On scooters, certain limits are imposed with regard to the

  arrangement of components because the pa-

  pin must be placed in a handlebar cover

tion.

  It is therefore a goal of the present in-

  vention to provide a mechanism for actuating a device located in an internal combustion engine smoothly according to desired characteristics, by means of a simple mechanical arrangement, in

  function of the opening of a butterfly in response to the

  placement of a throttle cable which is driven by an angular displacement of the throttle, for example,

  as an element operating the accelerator.

  According to the present invention, there is provided a mechanism for actuating a device located

  in an internal combustion engine having a cable

  pin, comprising a rotor which can move angularly

  in response to the movement of the butterfly, for ac-

  operating the device, and means with lost movement to render the rotor inoperative over a partial stroke

  the angular displacement of the latter during the actuation

ment of the device.

  The device located in the internal combustion engine may include a valve device

  exhaust, which has a pipe defining a step

  sage intended for the through passage of exhaust gases emitted from the internal combustion engine, a shaft extending rotatably transversely through the pipe, perpendicular to the axis of the pipe, and having at least a first part of end protruding from the pipe, and an exhaust valve fixedly mounted on the shaft, in the pipe, to open and

  selectively close the passage.

  The rotor has a drum arranged so

  rotary on said first end portion of the ar-

  bre protruding from the pipe, the cable

  pin having one end wound around the drum, the lost movement means being interposed between the

  drum and tree. Lost motion means include

  tent a stirrup fixed on said first end portion

  tree tee protruding from the pipe, and a

  spring arranged under compression between the caliper and the drum

  bour. The lost motion means further include

  stop means for holding the exhaust valve

  completely open after the exhaust valve

  has been moved angularly from a position

  fully closed to a fully open position

  green in response to the angular displacement of the drum. The stop means comprise a stop finger mounted on

  the tree perpendicular to it to come to bu-

  clamp against the pipe for an angular position of the

  bre in which the exhaust valve is in the po-

  completely open. The valve device

  exhaust further comprises means for recalling

  keen to recall the tree to angularly move the

  exhaust valve from the fully open position

  green to the fully closed position.

  The device located in the internal combustion engine may include a connection box from which the throttle cable is branched. The junction box comprises a housing, a shaft arranged in the housing and having opposite ends supported by the housing, the rotor being rotatably mounted on the shaft as the first drum, the butterfly cable having one end connected to the first drum, a second and a third drum being rotatably mounted on the shaft being successively adjacent to the

  first drum, a first branched cable from the cable

  butterfly valve and connected under tension to the first drum by tending to angularly move the first drum in a first direction around the shaft, a second branched cable from the butterfly cable and

  connected under tension to the second drum by tending to

  angularly place the second drum in said pre-

  first direction around the tree, and a third cable

  branched from the throttle cable and connected under tension

  sion to the third drum, tending to move angularly

  the third drum in said first direction

  tion around the tree. Lost motion means

  carry a first finger mounted on one side of the first drum, a first groove in an arc defined in the second drum, the first finger being engaged

  sliding way in the first arched groove

  key, a second finger mounted on one side of the second drum

  bour, and a second groove in an arc defined in the third drum, the second finger being engaged

  sliding way in the second groove

  key. When the first drum is angularly moved in a direction opposite to said first direction, by the throttle cable, the first and second fingers come into contact with the respective ends of the

  first and second grooves in an arc,

  pectively, to allow the second and third tom-

  purse to move angularly in the op-

  laid in said first direction, and when the throttle cable is released, the first drum is pulled by the first branched cable and rotated in said first direction, and the first and second fingers move to the respective opposite ends of the

  first and second grooves in an arc,

  pectively, and after which they come in contact with

  the respective opposite end of these to allow

  be on the second and third drums to move an-

  generally in said first direction.

  The present invention will now be described, by way of example only, with reference to the accompanying drawings in which:

  - Figure 1 is a side view of a motorcycle

  key that implements the principles of this invention

  tion, - Figure 2 is a side view showing the manner in which a junction box and

  affected devices are connected in the motorcycle

  presented in FIG. 1, FIG. 3 is a graph representing the opening characteristics of an exhaust valve as required by the engine output power,

  - Figure 4 is a sectional view of an arrangement

  sitive forming an exhaust valve comprising a mechanism intended to actuate a device located in an internal combustion engine according to a first embodiment of the present invention,

  - Figure 5 is a side view of the device

  tif forming an exhaust valve shown in FIG. 4,

  - Figure 6 is a sectional view of the device

  tif forming exhaust valve shown in Figure 4, - Figure 7a is a partially sectional view showing the manner in which an exhaust valve is fully closed, when a throttle cable is released, in the valve device shown in Figure 4, - Figure 7b is a partially sectional view showing the manner in which the exhaust valve is fully open, when the throttle cable is pulled, in the exhaust valve device shown in Figure 4, - Figure 7c is a partially sectional view showing the manner in which the valve

  exhaust is fully open, the cable for

  pin shown as being even more pulled and arriving in a lost motion state, - Figure 8a is a partial side view of an exhaust valve device comprising a mechanism for actuating a device located in an internal combustion engine according to a second embodiment of the present invention, the view representing

  the manner in which an exhaust valve is com-

  fully closed, - Figure 8b is a partial side view of the exhaust valve device shown in Figure 8a, showing the manner in which the exhaust valve is fully open when a throttle cable is pulled, the cable butterfly being represented as being even more pulled when arriving in a lost movement state, - Figure 9 is a partial side view of an exhaust valve device comprising a mechanism for actuating a device located in an internal combustion engine , according to a third embodiment of the present invention, - Figure 10 is a partial side view of an exhaust valve device comprising a mechanism for actuating a device located in an internal combustion engine, according to a fourth mode of the present invention, - Figure lla is a partial top view of a device forming a check valve an appement comprising a mechanism intended to actuate a device located in an internal combustion engine, according to a fifth embodiment of the present invention, the view representing

  the manner in which an exhaust valve is com-

  fully open, - Figure 11b is a partial top view of the exhaust valve device shown in Figure 11a, showing the manner in which the exhaust valve is fully open when a throttle cable is pulled, the cable with the throttle valve shown as being even more pulled when arriving in a lost motion state, - Figure 12a is a partial side view of an exhaust valve device having a mechanism for actuating a device located in a combustion engine internal, according to a sixth embodiment of the present invention, the view representing

  the manner in which an exhaust valve is com-

  fully closed, - Figure 12b is a partial side view of the exhaust valve device shown in Figure 12a, showing the manner in which the exhaust valve is fully open, - Figure 13 is a partial sectional view

  a connection box comprising a mechanism

  intended to actuate a device located in an internal combustion engine according to a seventh embodiment of the present invention,

  - Figure 14 is an exploded perspective view

  of several adjacent drums arranged in the connection box shown in FIG. 13,

  - Figure 15a is a view of the rac- box

  cord shown in Figure 13, as viewed in the direction indicated by the arrow "a", in a fully closed position, - Figure 15b is a view of the terminal box shown in Figure 13, as seen in the direction indicated by the arrow "b", in a fully closed position,

  - Figure 15c is a view of the rac- box

  cord shown in FIG. 13 as seen in the direction indicated by the arrow "c" in a completely closed state,

  - Figure 15d is a view of the rac- box

  cord shown in FIG. 13, as seen in the direction indicated by the arrow "d", in a fully closed position,

  - Figure 16a is a view of the rac- box

  cord shown in figure 13, as seen

  in the direction indicated by the arrow "a", in a po-

completely open,

  - Figure 16b is a view of the rac- box

  cord shown in FIG. 13, as seen in the direction indicated by the arrow "b", in a fully open position,

  - Figure 16c is a view of the rac- box

  cord shown in FIG. 13, as seen in the direction indicated by the arrow "c", in a fully open position,

  - Figure 16d is a view of the rac- box

  string shown in Figure 13, as viewed in the direction indicated by the arrow "d", in a fully open position, - Figure 17 is a graph showing

  the opening characteristics of the carburetor valve

  and the exhaust valve operatively connected

  rational to the connection box shown in Figure 13, - Figure 18 is a partial sectional view

  a modification of the connection box shown

  shown in Figure 13, and - Figure 19 is a rear view of a steering handle and the affected parts of a scooter, which

  includes the connection box shown in the figure

Figure 13 or Figure 18.

  We will now describe modes below

  preferred realization of a mechanism intended for action-

  ner a device located in an internal combustion engine

dull.

  Figure 1 shows a motorcycle 1 which

  incorporates the principles of the present invention. As re-

  presented in FIG. 1, the motorcycle 1 comprises a front wheel 2, a front fork 4, a steering handlebar, a front pipe 6, a protective cover 7, a body frame (not shown) arranged in the cover 7, a seat

  driver 8, a tilting arm 9, and a rear street 10.

  An internal combustion engine 11 is mounted on the frame

  of the body roughly centrally with respect to the motocy-

  key. The engine 11 comprises a cylinder block 12 inclined towards the front (see also FIG. 2) from which an exhaust pipe 13 extends towards the rear. The exhaust pipe 13 has a rear end connected to

  through a device forming a butterfly exhaust valve

  ment or device 15 forming an exhaust valve, to an expanded exhaust pipe 14 which is positioned on the right side of the motorcycle and which has a rear end connected to a silencer 3. The engine also has a

  inlet passage having a valve forming device

  carburetor nozzle or device 17 forming a carburetor valve, and an oil pump 18 is positioned at

  proximity of the device 17 forming a carburetor valve.

  ll A junction box 30 is fixed to the frame of the body directly or via a

stirrup (not shown).

  FIG. 2 shows the way in which the connection box 30 and the devices concerned are connected. A throttle capable 23 extends from a throttle housing 22 which is positioned adjacent

  to a throttle grip 21 (element actuating the acceleration

  tor) to the connection box 30 in which the throttle cable 23 is branched into three cables. These

  three cables, which extend from the connector box

  cord 30, comprise a cable 24 intended for the

  tif 17 forming carburetor valve, a cable 25 intended

  to the oil pump 18, and a cable 26 intended for the

  tif 15 forming an exhaust valve. The cable 24 is connected to the device 17 forming the carburetor valve, the cable is connected to the oil pump 18, and the cable 26 is connected to the device 15 forming the exhaust valve, to actuate these devices. These cables 24, 25, 26 are in

  made covered with a sheath and cannot be real-

  seen. However, these cables 24, 25, 26 and the gai-

  We will collectively call cables.

  The device 15 forming an exhaust valve

  has an exhaust valve which must have

  opening characteristics such (i.e. a rela-

  existing between the angular movements of the throttle grip and the opening of the exhaust valve)

  that, as shown in Figure 3, the exhaust valve

  pement increases its opening practically in a

  until it is fully open when

  that the throttle grip 21 is turned by an angle Oa (0a = to 50% of the total angular displacement of the throttle grip 21) and the exhaust valve thereafter remains fully open until the grip of the gas

  is completely angularly displaced (moving state-

lost).

  The mechanisms to activate a device if-

  killed in an internal combustion engine according to the first and up to the sixth embodiments of this

  invention, which will be described below, have a mechanism

  lost movement nism intended to lead to such ca-

opening characteristics.

  Figures 4 and 5 show the device 15 forming an exhaust valve comprising an actuating mechanism according to a first embodiment of the present invention. The device 15 forming a valve

  exhaust comprises a pipe 120 defining a step

  sage intended for the through passage of exhaust gases emitted from the engine 11, a shaft 121 extending rotatably transversely through the pipe 120 and having opposite end portions projecting from the pipe 120 perpendicular to the 'axis

  of the pipe 120, an exhaust valve 122 mounted in my

  fixed on the shaft 121 in the pipe 120, and a drum

  bour or rotor 123 rotatably arranged on a pre-

  the end portions projecting from the shaft 121. The shaft 121 is rotatably supported by means of bearings 124 arranged in stirrups 125, 126 which have ends arranged in the pipe 120. The valve d the exhaust 122 is a plate-type valve having a dimension which is approximately equal to an oblique transverse surface of the pipe 120 forming an angle Ob of 30, for example, with respect to the axis of the pipe 120, as shown in the Figure 6. The exhaust valve 122 is fixed on the shaft 121 of such

  so that it is at the angle Ob relative to

  port to the axis of the pipe 120 when the valve of the pipe 122

  is completely closed, and cannot be turned on

  tation in the closing direction.

  On the first of the end parts of

  the shaft 121, are arranged successively the tam-

  bour 123 by means of a bearing 127, and a stirrup 128. A first end of the branched butterfly cable 126 is wound around the drum 123. The stirrup 128 is fixed to the shaft 121 by a screwed nut 129. A spring 130 intended to press on the drum 123 is arranged under compression between the drum 123 and the stirrup 128. On the other end portion of the shaft 121 are arranged two spaced apart spring supports 132a, 132b which support a return spring 131 between them, around the shaft 121, as return means intended for

  recall the exhaust valve 122 to the complete state-

  closed. The return spring 131 has one end engaged with a hook 133 for spring which is fixed on

  the bracket 136, and the other end engaged with a hook

  chet (not shown) located on the spring support 132a. The spring supports 132a, 132b are fixed to the shaft 121 by a screwed nut 134. The spring support

  132b is held against the stirrup 126.

  A stop finger 135 is fixed on the shaft 125 perpendicularly to the axis thereof. When the shaft 121 is rotated, the stop finger 135 can abut against a first part forming the edge of

  the bracket 125 (see FIG. 7a) or a second form part

  mant edge of stirrup 125 (see figure 7b). When the

  stop finger 135 abuts against the first part

  tie or the second part forming the edge of the stirrup 125 in an angular position of the shaft 121 in which

  the exhaust valve 122 is completely closed or-

  green, the exhaust valve 122 is held in the

  fully closed or in the full position

  openly. A washer 136 arranged on the shaft 121

  is held against the bracket 125 and is retained in posi-

  tion by an E 137 ring arranged on the shaft 121.

  The operation of the actuation mechanism according to the first embodiment will be described below.

  below referring to Figures 7a to 7d.

  Figure 7a shows how the

  exhaust valve 122 is completely closed, the poi-

  gas gas 21 not being actuated. In this state, the spring support 122a fixed on the shaft 121 is rotated in the direction indicated by the arrow A due to the return of the return spring 131. The shaft 121 is therefore rotated until that the stop finger 135 fixed on the shaft 131 abuts against the first part forming the edge of the stirrup 125 after which the exhaust valve 122 fixed on the shaft 121 is completely closed. Even if the exhaust valve 122 is in the fully closed position, there is a small gap or clearance maintained between the surface

  inner circumference of the pipe 120 and the cir-

  external conferring of the exhaust valve 122.

  Figure 7b shows how

  the exhaust valve 122 is fully open when

  that the throttle grip 21 is rotated over a certain angular displacement (situated in the range from 30 to 50% of the total angular displacement), that is to say when the throttle grip is turned by the angle Oa in Figure 3. Specifically, the throttle grip 21

  is rotated according to a certain angular displacement

  area in the range of 30 to 50% of the displacement

  total angular position) from the position shown in Figure 7a, by pulling the throttle cable 26 in the direction indicated by the arrow B (see Figure 7b) against the return of the return spring 131. Although the drum 123 is rotatably arranged from the shaft 121 via the bearing 127, the drum 123 and the shaft 121 are angularly moved together in a

  direction opposite to direction A under the effect of the

  these exerted by the spring 130. The shaft 121 is moved angularly from Ob until the stop finger 135 comes into abutment against the second part forming the edge of the stirrup 125, after which the exhaust valve 122 has been rotated from the fully closed position to the

fully open position.

* Figure 7c shows how the exhaust valve 122 remains fully open even when the throttle grip 21 is rotated

  on the total angular displacement. Specifically

  that the throttle grip 21 is rotated over the total angular displacement from the position

  shown in Figure 7b, pulling the cable even more

  butterfly valve 26 in direction B. Drum 123

  is then rotated around the wheel 121 at the end

against spring forces 130.

  Meanwhile, although the throttle cable 26 is pulled even further, the exhaust valve 122 remains in a lost motion state in which it

  is not actuated (the throttle grip rotates from the

  angular cement 0a towards the total angular displacement in figure 3). Therefore, the exhaust valve

  122 is held in the fully open position.

  In other words, the angular displacement of the drum 123 during this time is an insane displacement, not affecting

the exhaust valve 122.

  When the throttle grip 121 is completely pulled back, the shaft 121 rotates backward

  under the effect of the return of the return spring 131 to

  angularly place the exhaust valve 122 from the open position to the closed position. Valve

  122 is not completely closed as re-

shown in Figure 7a.

  FIGS. 8a and 8b are partial side views of a device 140 forming a valve comprising a mechanism intended to actuate a device located in an internal combustion engine, according to a second mode of

  realization of the present invention.

  As shown in FIGS. 8a and 8b, the device 140 forming an exhaust valve comprises a pipe 141 defining an interior passage intended for the through passage of the exhaust gases emitted from the engine 11, a shaft 142 extending in a rotary manner

  transversely to pipe 121 and having parts of ex-

  opposite ends protruding from the pipe 141 perpendicular to the axis of the pipe 141, an exhaust valve 143 fixedly mounted on the shaft 142 in the pipe 141, and a connecting mechanism 144 engaging a first protruding ends

from tree 142.

  The connecting mechanism 144 comprises an arm having a first end fixed to the shaft 142 and supporting a finger 146 mounted on its other end, and

  a guide wing or rotor 148 having a guide slot

  dage 147 defined in an end part thereof and guiding the finger 146 and an opposite end part

  connected to one end of the throttle cable 26.

  The guide wing 148 is mounted in an an-

  generally movable on an outer surface of the pipe 141 by means of a shaft 149 which is fixed on the pipe 141 and has one end extending through a

  practically central part of the guide wing 148.

  The end of the throttle cable 26 is connected to the wing

  guide 148 by a connector 150 which is connected to the ex-

  end of the throttle cable 26 and is arranged angular-

  movable on a shaft 151 which is fixed on the part

  opposite end of the guide wing 148.

  Operation of the actuation mechanism

  shown in Figures 8a and 8b will be described below

  below. FIG. 8a represents the way in which the exhaust valve 143 is completely closed, that is to say makes an angle Ob with respect to the axis of the pipe 141. When the handle of the gases 121 is then

  turned to pull the throttle cable 26 in the direction

  tion indicated in arrow C, the guide wing 148 is rotated around the shaft 149 in the direction indicated by arrow D against the return exerted

  by a return spring (not shown) having a pre-

  first end in engagement with the pipe 141 and the other ex-

  end in engagement with the guide wing 148.

  Since the finger 146 located on the arm 145 fixed on the shaft 142 moves in a sliding manner in the guide slot 147 existing in the guide wing 148, the finger 146 moves along the guide slot

  147 from one end 147a thereof to an end

  opposite half 147b thereof, time during which the arm 145 is rotated. The shaft 142 is also rotated in unison with the arm 145 until

  finger 146 reaches an elbow 147c from the guide slot

  dage 147 located between its ends 147a, 147b, after

  whereby the exhaust valve 143 is fully open.

  At this time the throttle grip 21 was turned from the year

gle Oa in Figure 3.

  When the throttle grip 21 is brought up

  rotation, towards the complete angular displacement, in ti-

  rant throttle cable 26 in direction C, the arm is not rotated because the part of the guide slot 147 extending between the elbow 147c and the end 147b is in an arc of circle around the tree

  149 and moves loosely around finger 146.

  As a result, the exhaust valve 143 remains complete.

  open whatever the additional traction

  exerted on the throttle cable 26.

  Specifically, the guide slot 147 comprises a first section of slot from the end 147a towards the elbow 147c and progressively deviating from the axis of the shaft 149, and a second section of slot extending contiguously. from the bend 147c towards the end 147b being spaced a distance

  constant with respect to the axis of the tree 149.

  Figure 8b shows how the exhaust valve 143 is in a moving state

  lost while the throttle grip 21 is rotated

  tion from the angular displacement Oa towards the displacement

total angular cement.

  When the throttle grip 21 is rotated

  tion on the total angular displacement, the guide wing

  dage 148 is completely rotated in the direction

  tion D around the shaft 149, the end 147b of the guide slot 147 being positioned close

narrow finger 146.

  When the throttle grip 21 is completely

  brought back, the exhaust valve 143 is rame-

  born towards the fully closed position shown in Figure 8a due to the elasticity of the return spring

not shown.

  Since the connecting mechanism 144 serves as a

  canism with lost movement, the characteristics of

  ture desired for the exhaust valve 143 can be obtained in a simple manner by the configuration of the

guide slot 147.

  The return spring, not shown, of the device

  tif 140 forming an exhaust valve may include a return spring similar to the return spring 131 of the

  device 15 forming an exhaust valve according to the pre-

  mier embodiment, the return spring being mon-

  tee on the end of the shaft 142 opposite the end of the latter which is connected to the arm 145 associated with the guide wing 148.

  FIG. 9 represents a device 160 for-

  mant exhaust valve comprising a mechanism intended

  to operate a device located in a combustion engine

  internal tion according to a third embodiment of the

present invention.

  The device 160 forming an exhaust valve comprises a pipe 161 defining an interior passage intended for the passage passing through the exhaust gases emitted from the engine 11, a shaft 162 extending in a rotational manner transversely through the pipe 161 and having opposite end portions projecting from pipe 161 perpendicular to the axis of pipe 161, an exhaust valve 163 fixedly mounted on

  the shaft 162 in the pipe 161, and an arm 164 fixed to the level

  calf from its center on a first end in

projection of the tree 162.

  The arm 164 supports on a first end

  a fixed finger 165 on which is arranged a first ex-

  end of an accessory 166 connected at its other end to the throttle cable 26. The other end of the arm 164 can be held in abutment against a stop 167

  mounted on the pipe 161 when the arm 164 is rotated

  tation to a certain angular position in which the exhaust valve 163 is fully open. A spring 168 is connected to the throttle cable 26 in series

  with it near accessory 166.

  The actuation mechanism according to the third

  embodiment acts as follows: FIG. 9 shows

  feels the way in which the exhaust valve 163 is completely closed, the handle of the gases 21 not being rotated. When the throttle grip 21 is rotated to pull the throttle cable 26 in the direction indicated by the arrow E, the arm 164 rotates around the shaft 162 in the direction indicated by the arrow F against the return a return spring (not shown) which has a first end connected to the pipe 161 and the other end connected to the arm 164, and the shaft 162 is also rotated in unison with the

arm 164.

  When the other end of the arm 164 abuts against the stop 167, the exhaust valve 163 is completely open. At this time, the throttle grip 21 is turned 0a in Figure 3. When the grip of the

  gas 121 is even more oriented towards angular displacement

  total area for pulling the throttle cable 26 into the

  direction E, the spring 168 is stretched in an elastic manner

  than. The stretched length of the spring 168 absorbs the stroke of the throttle cable 26 after the exhaust valve 163 has been fully opened. The exhaust valve 163 is now in a lost motion state in which it is not actuated (the throttle grip 121 is turned from the angular displacement 0a towards the complete angular displacement in FIG. 3) whatever the traction additional pressure exerted on the throttle cable 26. Consequently, the exhaust valve 163

  is kept in the fully open position.

  When the throttle grip 21 is brought back as

  fully back, the exhaust valve 163 is ra-

  driven to the fully closed position, shown in Figure 9, due to the elasticity of the spring

reminder not shown.

  The return spring 168 connected in series with the

  throttle cable 26 serves as a movement mechanism

  lost for the exhaust valve 163.

  The return spring, not shown, of the device

  tif 160 forming an exhaust valve can be arranged

  the same way as the return spring 131 of the device

  tif 15 forming an exhaust valve according to the first embodiment.

  FIG. 10 represents a device 170 for-

  mant exhaust valve comprising a mechanism intended

  to operate a device located in a combustion engine

  internal tion according to a fourth embodiment of the

present invention.

  The device 170 forming an exhaust valve comprises a pipe 171 defining an interior passage intended for the passage passing through the exhaust gases emitted from the engine 11, a shaft 172 extending in a rotational manner transversely through the pipe 171 and having opposite end portions projecting from pipe 171 perpendicular to the axis of pipe 171, an exhaust valve 173 fixedly mounted on

  the shaft 172 in the pipe 171, and an arm 174 fixed to the level

  calf from a part close to one end 174a thereof

  on one of the projecting ends of the shaft 172.

  The end 174a of the arm 174 can be brought into abutment against a stop 175 mounted on the pipe 171. The arm 174 has an opposite end portion 174b in

  which is defined by a guide slot 176.

  evening 178 is connected at one end to the end of the throttle cable 26 and supports on its other end a fixed finger 177 which arranged so

  sliding in the guide slot 176.

  Operation of the actuation mechanism

  according to the fourth embodiment will be described below

  below. Figure 10 shows how the

  exhaust valve 173 is completely closed, the poi-

  gas gas 21 not being rotated. When the throttle grip 21 is turned to pull the throttle cable 26 in the direction indicated by the arrow G, the arm 174

  is rotated around tree 172 in the indicated direction

  quée by arrow H against the return of a return spring (not shown) which has a first end connected to the pipe 171 and the other end connected to the arm 174, and the shaft 172 is also rotated in unison

with arm 174.

  When the end 174a of the arm 174 abuts against the stop 175, the exhaust valve 173 is completely open. At this time, the throttle grip 121

  is rotated by angle 0a in Figure 3.

  When the throttle grip 21 is turned

  core more towards the total angular displacement to pull the throttle cable 26 in the direction G, the finger 177 moves in the guide slot 176 and along

  the latter towards an outer end 176a thereof.

  This movement of the finger 177 absorbs the curve of the throttle cable 177 after the exhaust valve 173 has been fully opened. The exhaust valve 173 is now in a lost motion state in which

  it is not actuated (the throttle grip 21 is turned

  born from the angular displacement 0a towards the displacement-

  total angular angle in figure 3,) whatever the additional traction exerted by the throttle cable

  26. Therefore, the exhaust valve 173 is main-

  held in the fully open position.

  When the throttle grip 21 is brought back as

  fully backwards, the exhaust valve 173 is brought back to the fully closed position shown in FIG. 10 due to the elasticity of the spring

reminder not shown.

  Guide slot 176 and finger 177 jointly serve as a lost motion mechanism

for the exhaust valve 173.

  The return spring, not shown, of the device

  tif 170 forming an exhaust valve can be arranged

  the same way as the return spring 131 of the device

  tif 15 forming an exhaust valve according to the first embodiment.

  Figures 11a and 11b show a device

  tif 180 forming an exhaust valve comprising a mechanism

  mechanism for actuating a device located in a mo-

  internal combustion tor according to a fifth mode of reaction

of the present invention.

  The device 180 forming an exhaust valve comprises a pipe 181 defining an interior passage intended for the passage passing through exhaust gases emitted from the engine 11, a shaft 182 extending in a rotational manner transversely through the pipe 181 and having opposite end portions projecting from pipe 181 perpendicular to the axis of pipe 181 through respective mounting brackets 182a, 182b mounted on pipe 181, an exhaust valve 181a fixedly mounted on the shaft 182 in pipe 181,

  a drum 185 arranged on a first of the parts of ex-

  end projecting from pipe 181, an end

  moth of the butterfly cable 26 being wound around the drum 185, and a spring 186 arranged around the shaft 183 under compression between the fixing bracket 182a and the drum 185. The spring 186 has opposite ends connected to the bracket 182a and the drum 185 respectively. The drum 185 is engaged with the shaft 183 so that the drum 185 slides axially in the direction indicated by the arrow J against the return of the spring 186 when the throttle cable 26 is

  subjected to a traction greater than a predeter level-

  mined in the direction indicated by arrow I. The actuation mechanism according to the fifth

  embodiment acts as follows: FIG. 1 represents

  feels the way in which the exhaust valve 184 abuts against a stop (not shown) and is fully open when the throttle grip 21 is turned Oa in Figure 3. When the throttle grip 21 is turned to fire the butterfly cable 26 in the

  direction indicated by arrow I to open completely-

  the exhaust valve 184, the drum 185 is

  placed in the direction indicated by the arrow J at the

  against the return of spring 186. This displacement of the drum

  bour 185 absorbs the throttle cable stroke 26 after

  the exhaust valve 184 has been completely or

  green. The exhaust valve 184 is now in a

  lost motion state in which it is not action-

  born (the throttle grip 21 is turned from the displacement an-

  gular Oa towards the total angular displacement on the fi-

  gure 3) whatever the additional traction exerted by

  created by the throttle cable 26. Consequently, the valve

  184 is kept in the full position

openly.

  When the throttle grip 21 is completely

  brought back, the exhaust valve 184 is oar-

  born towards the fully closed position, shown on

  FIG. 10 under the effect of the elasticity of the spring 186.

  The drum 185 which currently slides during-

  that the throttle cable 26 is subjected to greater traction than a predetermined level serves as a lost motion mechanism for the exhaust valve

184.

  Figures 12a and 12b show a device

  tif forming an exhaust valve comprising a mechanism for actuating a device located in an internal combustion engine according to a sixth embodiment

of the present invention.

  The device 190 forming an exhaust valve comprises a pipe 191 defining an interior passage intended for the passage through the emitted exhaust gases.

  by the motor 11, a shaft 192 extending in a ro-

  tative transversely through the pipe 191 and having opposite end portions projecting from the pipe 191 perpendicular to the axis of the pipe 191, an exhaust valve 193 fixedly mounted on the shaft 192 in the pipe 191 , and a drum 194 fixedly mounted on a first of the end parts

  protruding from pipe 191.

  The drum 194 has a part around which is wound one end of the butterfly cable 26, and this part of the drum 194 has a radius, or a radial dimension from the axis of the shaft 192, progressively larger in a direction to fully open the

exhaust valve 193.

  The actuation mechanism according to the sixth

  embodiment acts as follows: FIG. 12a shows

  feels the way in which the exhaust valve 193 is completely closed, the throttle handle 21 not being turned. When the throttle grip 21 is turned

  to pull the throttle cable 26 in the direction

  indicated by arrow K, the drum 194 rotates around the shaft 192 in the direction indicated by arrow L at

  against the return of a return spring (not shown

  felt) having a first end engaged with the pipe 191 and the other end engaged with the drum

  194, and the shaft 192 also rotates in unison with the drum

  bour 194. When the drum 194 abuts against a stop (not shown), the exhaust valve 193 is completely open, as shown in FIG. 12b, the handle of the gases 21 being turned from Oa in FIG. 3.

  The drum 194 can be replaced by the drum

  bour 123 according to the first embodiment or by the

  drum 185 according to the fifth embodiment of ma-

  to provide a lost motion mechanism for absorbing the travel of the throttle cable 26 after the

  exhaust valve 193 has been fully opened.

  When the throttle grip 21 is completely

  brought back, the exhaust valve 193 is oar-

  born towards the fully closed position shown on

  Figure 12a due to the elasticity of the return spring

pel not shown.

  The load on the throttle grip 21 can be reduced by positioning eccentrically

  relative to each other the center of the part of the drum

  bour 194 which wraps the butterfly cable 26 around

  this and the center of the drum 194.

  The return spring, not shown, of the device

  tif 190 forming an exhaust valve can be arranged

  the same way as the return spring 131 of the device

  tif 15 forming an exhaust valve according to the first mode

of achievement.

  In each of the above embodiments,

  it is necessary to modify the relation (the

  opening) existing between the displacement an-

  gular of the throttle and the degree of opening of the exhaust valve depending on the type of engine and the engine output power, and such an imperative

  can be satisfied by a relative actuation mechanism

tively simple and inexpensive.

  Since the actuation mechanism is incorporated

  ported to and around the exhaust valve in

  each of the above embodiments, it is possible

  ble to use existing parts with cable

  throttle valve 26, throttle body 22, etc. in combination

  naison with the actuation mechanism.

  A mechanism for actuating a device located in an internal combustion engine according to a seventh

  embodiment of the present invention, and a mo-

  description of it will be described below. From the first to the sixth embodiments described above, the actuation mechanism is mainly

* combined directly with the mechanism forming the escape valve

  is lying. In the seventh embodiment, however, the actuating mechanism can be combined with the carburetor valve device and the oil pump as well.

  than the exhaust valve mechanism, and is in-

  embedded in the connection box from which the branched throttle cables extend,

  as shown in Figures 1 and 2.

  Figure 13 shows in section a box of

  connection 230 comprising a mechanism intended to ac-

  operating a device located in a combustion engine

  internal according to the seventh embodiment of the pre-

  invention. The connection box 230 comprises a housing 231, a shaft 232 arranged in the housing 231 and having opposite ends supported respectively by the side walls of the housing 231, and several

  adjacent drums 234, 235, 236 rotatably mounted

  tive on the shaft 232 by means of trunnions or roller bearings 233, the drums 234, 235, 236 being respectively connected to a cable 224 of carburetor valve, a cable 225 of oil pump, and a cable 226 exhaust valve. Drums 234, 235, 236

  located on the tree 232 are separated from each other.

  Fingers 237, 238 are mounted on the respective sides

  drums 234, 235 and are slidably received

  health in grooves 239, 241 forming cams in an arc, respectively, which are defined in the sides of the drums 235, 236. A spring 242 is arranged under compression between a first of the side walls of the housing 231 and the drum 236, to recall normally drums 234, 235, 236 axially in one direction to eliminate unwanted axial play between the

drums 234, 235, 236.

  FIG. 14 shows in exploded perspective the drums 234, 235, 236. The cable 224 of the carburettor valve is fixed at a first end to the drum 234 on an axial side thereof, and the cable

  of butterfly 23 is fixed at one end to the drum

  bour 234 on the other axial side thereof. The oil pump cable 225 and the exhaust valve cable 226 are fixed respectively to the drums 235, 236. The cables 224, 225, 226 are stretched longitudinally to

  rotate the respective drums 234, 235, 236 above

  turn the shaft 232 in the directions indicated by the arrows in FIG. 14. A spring 243 for lost movement (described later) is connected to the valve cable 226

  exhaust, in series with this one.

  The cam grooves 239, 241 have the shape of grooves in an arc of a circle and cooperate with the fingers 237, 238 by providing the mechanisms with lost movement

  of the seventh embodiment of the present invention.

  The operation of the drums 234, 235, 236 received in the connection box 230 will now be

  described below. The device 17 forming the car valve

  burator, oil pump 18, and device 15 for-

  mant exhaust valve shown in figure 2 com-

  carry mechanisms (such as torch springs

  sion), combined directly or indirectly with these

  ci, to close or decelerate the device 17 for-

  mant carburetor valve, the oil pump 18, and the

  device 15 forming an exhaust valve when the cables

  corresponding cores 224, 225, 226 are released.

  Figures 15a to 15d show the junction box shown in Figure 13 as viewed in the directions indicated by the arrows "a", "b", "c", "d", respectively, in a fully closed position. In FIG. 15b, the throttle cable 23 is completely released and an opening reference line L2 of the drum 234 relative to the throttle cable

  23 is angularly spaced from 02 in the direction of ai-

  watch faces from a Y axis which is a vertical axis. In FIG. 15c, the finger 237 mounted on the

  drum 234 is positioned at the left end

  che (as seen in figure 15c) of throat 239 for-

  mant cam of drum 235, and a reference line from

  the groove L3 of the drum 235 is spaced angularly from 03 in a clockwise direction from the axis Y. In FIG. 15d, the finger 238 mounted on the

  drum 235 is positioned at the left end

  che (as seen in figure 15d) of the groove 241 for-

  mant cam of drum 236, and a reference line from where

  verture L4 of the drum 236 is angularly spaced from 04 in a clockwise direction from the axis Y. At this moment, the spring 243 for lost movement is contracted. In FIG. 15a, the drum 234 is in the same position as that shown in FIG. 15b, and an opening reference line L1 of the drum 234 relative to the cable 224 of the carburetor valve is angularly spaced from 01 (= 02 ) clockwise from the Y axis. Figures 16a to 16d show the junction box shown in Figure 13 as viewed in the direction indicated by the arrows "a", "b" , "vs",

  "d", respectively, in a completely open position

green.

  In Figure 16b, the drum 234 is pulled by the throttle cable 23 and rotates 0 clockwise from the reference line

opening L2.

  In Figure 16a, the valve valve cable 224

  carburetor connected to drum 234 is also pulled, or

to the carburetor valve.

  In FIG. 16c, the drum 235 is turned from 0 clockwise from the opening reference line L3 by the finger 237 mounted on the drum 234, pulling the cable from 225 from pump to

  oil to accelerate the oil pump.

  In FIG. 16d, the drum 236 is turned by o (= 041 + 042) clockwise from the opening reference line L4 by the finger 238 mounted on the drum 235, pulling the exhaust valve cable 226 so as to open the exhaust valve. Figure 17 shows the opening characteristics of the carburetor valve and the exhaust valve operatively connected to the junction box shown in Figure 13. The graph shown in Figure 17 has a horizontal axis representing the displacement angular drums and a

  vertical axis representing the degree of valve opening.

  The carburetor valve is opened substantially proportional to the angular displacement of the drum 234. However, the exhaust valve must have a limited opening when the engine is intended to run at low speed to obtain low output powers, and must remain open when the motor is intended to rotate at high speed to obtain high output powers. The exhaust valve is fully open when drum 236 is rotated by 041 (= 30 for example), and remains fully open

  when the drum 236 is rotated from 041 to 042-

  As shown in Figure 16d, the exhaust valve is fully open when the drum 236 is rotated from 041, and remains fully open when the drum 236 is rotated from 041 to 042 because

  the spring 243 forming a lost movement is extended.

  To bring back the carburetor valve, the pump

  oil valve and exhaust valve from position

  fully open shown in Figures 16a to 16d to the fully closed position shown in Figures 15a to 15d, the throttle cable 23 shown in Figure 16d is released to the position shown

in Figure 15b.

  The fingers 237, 238 and the grooves 239, 241 form

  mant cams that serve as a lost motion mechanism,

will be described below.

  It is assumed that the drum 235 connected to the cable

  225 of the oil pump is kept in the position shown

  felt in Figure 16c for some reason.

  When the throttle cable 23 shown in Figure 16b is released at this time, the finger 237 mounted

  on the drum 237 connected to the fuel valve cable 234

  The rator moves in the groove 239 forming a cam from the left end to the right end of the latter shown in FIG. 16c. As a result, only the drum 234 returns to the position shown on the

  Figures 15a and 15b, without affecting the drum 235.

  If the drum 236 connected to the cable 236 of the exhaust valve is kept in the position shown

  in FIG. 16d, then only the drums 234, 235 represent

  come to the positions shown in the figures

  a to 15c when the throttle cable 23 is released.

  Therefore, even if the drum 235 and / or the drum 236 is fixed to the turned position, the valve of the carburetor valve device 17 can be

  completely closed by the throttle grip 21 for

  reduce the motor output power 11.

  Figure 18 shows a modification of the met

  actuation mechanism according to the seventh embodiment described above. According to the modification shown in Figure 18, a junction box 230 'has

  a housing 231 which receives the drums 234, 235, 236 mon-

  tees rotatably on a shaft 232. A long finger 235 is mounted on the drum 234 and the drums 235, 236

  have through grooves forming cams in a circular arc

  respective key and having identical shapes in them-

  which the long finger 235 is received in a sliding manner

  health. Since the drums 235, 236 have an identical shape

  tick to each other, they can be used in common,

  and the number of different parts of the mechanism

operation is reduced.

  Figure 19 is a rear view of a handlebar

  steering and affected parties of a scooter which

  carries the junction box 230 shown in the figure

  gure 13 or the 230 'connection box shown on

  Figure 18. As shown in Figure 19, a box

  throttle valve 322 disposed adjacent to a throttle grip 321 is received in a handlebar cover 301 which supports

  a direction indicator switch 302 and a switch

  starter guard 303 located near the throttle body 322. The junction box 230 of the seventh

  embodiment being incorporated in the scooter re-

  shown in figure 19, since the junction box

  230 and throttle body 322 can be separated

  res one of the other, the throttle body 322 can have greatly reduced dimensions, allowing the

  direction indicator switch 302 and at the switch

  starter tor 303 to be positioned according to an agency-

  which can be easily designed.

  In the seventh embodiment, when the throttle is returned to release the cable from

  butterfly to rotate the drum backwards

  bour connected to the carburetor valve cable, the carburetor valve can be partially closed regardless of how the drum connected to the oil pump cable and the drum connected to the exhaust valve cable are operated. Therefore, the carburetor valve can be reliably operated for safety reasons. Since the three drums are received separately in the junction box, they can be replaced independently or have modified dimensions, and the cost of these can

be reduced.

  The function box which receives the three tam-

  bursa intended to actuate the device forming carburetor valve, the oil pump, and the device forming

  exhaust valve, via resistor cables

  pectifs can be positioned away from the throttle grip. As a result, the normally arranged throttle body adjacent to the throttle can

  have a reduced size, and various switches can

  can be positioned near the throttle body,

in a free layout.

Claims (15)

  1. Mechanism for actuating a device (15;   ; 160; 170; 180; 190; 230) located in a   internal bust and, having a throttle cable (23; 26), characterized in that it comprises: a rotor (123; 148; 164; 174; 185; 194; 234) angularly movable in response to the displacement of the throttle cable intended to actuate the device, and means forming lost movement (128,130; 145, 146, 147; 166, 167, 168; 175, 176, 177, 178; 182a, 186; 194; 237, 238, 239, 241) for drive said rotor crazy over part of the course of its angular displacement   upon actuation of the device.   2. Mechanism according to claim 1, character-   laughed at in that said device consists of a provision   exhaust valve sitive (15; 140; 160; 170;; 190), said exhaust valve device comprising:   a hose (120; 141; 161; 171; 181; 191) defi   connecting an interior passage for the crossing passage   exhaust gases from the internal combustion engine dull,   a tree (121; 142; 162; 172; 182; 192) extends   dant rotatably transversely through the pipe perpendicular to the axis of the pipe and having at least one end portion projecting from said pipe, and an exhaust valve (122; 143; 163; 173;   183; 193) fixedly mounted on said shaft in the-   said pipe to selectively open and close the said passage.   3. Mechanism according to claim 2, character-   laughed in that said rotor consists of a drum   (123) rotatably arranged on said first part   shaft end tie (121) projecting from said pipe (120), the throttle cable (26) having one end wrapped around said drum (123), said   means forming lost movement being interposed between the-   said drum (123) and said shaft (121).   4. Mechanism according to claim 3, characterized in that said means forming lost movement   consist of a stirrup (128) fixed on said pre-   first end portion of the shaft projecting from said pipe, and a spring (130) arranged under compression between said stirrup (128) and said drum (123).   5. Mechanism according to claim 4, character-   laughed in that said lost motion means (128, 130) further includes stop means (135)   to maintain said exhaust valve (122) complete-   open after the exhaust valve has been removed   angularly placed from a fully closed position to a fully open position in response   to the angular displacement of said drum (123).   6. Mechanism according to claim 5, character-   laughed at in that said stop means are constituted   a stop finger (135) mounted on said shaft (121) per-   pendulum to the axis thereof to abut against said pipe (120) in an angular position of said shaft in which said exhaust valve   (122) is in said fully open position.   7. Mechanism according to claim 6, character-   laughed in that said device (15) forming an exhaust valve further comprises return means (131) intended to return said shaft (121) to angularly move said exhaust valve (122) from the   fully open position to full position- closed.   8. Mechanism according to claim 2, character-   laughed in that said rotor consists of an element of   guide (148) having a central part supported in a   angularly movable by said pipe (141) and a   end connected to said throttle cable (26), said element   guide guide (148) being angularly movable around said central part in response to the movement of said throttle cable, said lost movement means comprising an arm (145) having one end fixed on   said first end portion of the shaft (142) is   projecting from said pipe (141) and an op-   placed supporting a finger (146), and a guide slot (147) defined in said guide member, said finger being slidably engaged in said guide slot, said guide slot (147) having a   first section of slot (147a-147c) progressing apart-   increasingly from said central part of   the guide element and a second slot section (147c-   147b) contiguous to said first section of slot and spaced constantly with respect to said central part of the guide element.   9. Mechanism according to claim 2, character-   risé in that said rotor consists of an arm (164) fixed at its central part on said first part of the end of the shaft (162) projecting at   from said pipe (161), said means forming movement   ment lost include a fixing (166) connected in a ma-   angularly mobile at one end of said arm (164) and connected to said throttle cable (26), a stop (167) mounted on said pipe to abut against   an opposite end of said arm in an angular position   the area of said shaft in which said escape valve   remains fully open, and a spring (168)   linked to the throttle cable in series with it.   10. Mechanism according to claim 2, charac-   characterized in that said rotor consists of an arm (174) fixed on said first end portion of the shaft (172) projecting from said pipe (171), said lost movement means being constituted   a stop (175) mounted on said pipe to come into bu-   tee against one end of said arm (174) in a position   angular tion of said shaft in which said exhaust valve remains fully open, a guide slot (176) defined in an opposite end portion of said arm, and a fastener (178) having a finger (177) engaging sliding in said guide slot (176) is connected to said throttle cable (166).   11. Mechanism according to claim 2, charac-   terized in that said rotor consists of a drum   (185) rotatably arranged on said first part   shaft end tie (182) projecting from   of said pipe, the butterfly cable (26) having an end   tee wound around said drum (185), said lost motion means comprising a fixing bracket (182a) mounted on said first end portion of the shaft (182) projecting from said pipe, a spring (186) arranged under compression between said stirrup   and said drum (185) and having ends   opposite tees respectively connected to said fixing bracket   tion and said drum, and a stop mounted on said pipe to abut against said exhaust valve (183) in an angular position of said shaft in which said exhaust valve remains fully open, the arrangement being such that after that said exhaust valve has been fully opened and held in abutment against said stop, said drum (185) can slide angularly on said shaft towards said fixing bracket so as to support said spring in response to   additional movement of the throttle cable (26).   12. Mechanism according to claim 3 or 11, characterized in that said drum (194) comprises a   part around which the end of the cable   pin (26) is wound, said part having a radius becoming progressively larger in one direction   to fully open said butterfly valve.   13. Mechanism according to claim 1, characterized in that said device consists of a   connection box (230) in which the cable for branch (23) is branched.   14. Mechanism according to claim 13, charac-   terized in that said connection box (230) comprises   door: a housing (231) a shaft (232) arranged in said housing and   having opposite ends supported by said box tier,   said rotor being mounted on said ma-   rotatable as the first drum (234) on the   said shaft, said throttle cable (23) having an end   mite connected to said drum (234), a second and a third drum (235, 236) rotatably mounted on said shaft (232) being successively adjacent to said first drum (234), a first branched cable (224) branched from said throttle cable (23) being connected to said first   drum (234) under tension tending to move angularly   said first drum in a first direction tion around said tree (232),   a second branched cable (225) branched from   shot of said butterfly cable being connected to said second   drum (235) under tension tending to move angularly   said second drum in said first di-   rection around said tree (232), and   a third branched cable (226) branched from   shot of said butterfly cable being connected to said third   drum (236) under tension tending to move angularly   said third drum in said first direction around said shaft (232), and in which said lost motion means comprise: a first finger (237) mounted on one side of said first drum (234),   a first groove (239) in a defined arc   negates in said second drum (235), said first finger (237) being slidably engaged in said first groove in an arc; a second finger (238) mounted on one side of said second drum (235), and   a second groove (241) in a defined arc   negates in the third drum (236), said second finger (238) being slidably engaged in said second groove in an arc,   the arrangement being such that when said first   mier drum (234) is angularly moved in a di-   rection opposite to said first direction by said cable   butterfly (23), said first and second fingers   (237, 238) come into contact with the res-   pectives of said first and second arcuate grooves (239, 241) respectively, to allow said second and third drums (234, 235) to be moved   angularly in said direction opposite to said pre-   first direction, and when said throttle cable (23)   is released, said first drum (234) is pulled by-   said first branched cable (224) and rotated in said first direction, and said first and second   fingers (237, 238) move to opposite ends   respective ones of said first and second grooves in an arc, respectively, and after which come in   contact with respective opposite ends of it   these to allow said second and third tam-   purse (234, 235) to move angularly in said first direction.   15. Mechanism according to claim 13, charac-   terized in that said connection box (230) comprises   door: a housing (231) a shaft (232) arranged in said housing and   having opposite ends supported by said box tier,   said rotor being mounted on said ma-   rotatable as the first drum (234) on the   said shaft, said throttle cable (23) having an end   mite connected to said drum (234), a second and a third drum (235, 236) rotatably mounted on said shaft (232) being successively adjacent to said first drum (234), a first branched cable (224) branched from said throttle cable (23) being connected to said first   drum (234) under tension tending to move angularly   said first drum in a first direction tion around said tree (232),   a second branched cable (225) branched from   shot of said butterfly cable being connected to said second   drum (235) under tension tending to move angularly   said second drum in said first di-   rection around said tree (232), and   a third branched cable (226) branched from   shot of said butterfly cable being connected to said third   drum (236) under tension tending to move angularly   said third drum in said first direction around said shaft around said shaft (232), and wherein said lost motion means includes: a finger (237) mounted on one side of said first drum (234), and through grooves (239 , 241) in an arc having an identical shape, defined respectively in said second and said third drum, said finger (237) being slidably engaged in said through grooves in an arc,   the arrangement being such that when said first   mier drum (234) is angularly moved in a di-   rection opposite to said first direction by said cable   ble butterfly (23), said finger (237) comes into contact   with respective ends of said grooves crossing   arcuate, respectively, to allow said second and third drums (235, 236) to move angularly in said direction opposite to   said first direction, and when said cable of pa-   pillon (23) is released, said first drum (234) is   pulled by said first branched cable (224) and put in ro-   in said first direction, and said finger (237) moves to the respective opposite ends   of said through grooves in respective arc of a circle   ment, and after which, comes into contact with the respective opposite ends thereof to allow said second and third drums (235, 236) to move   angularly in said first direction.