JP4392788B2 - Auto idle stop vehicle - Google Patents

Description

  The present invention relates to an automatic idle stop vehicle having an automatic idle stop function for prohibiting idling by automatically stopping an engine under predetermined conditions when the vehicle is stopped, and more particularly to an automatic idle stop vehicle equipped with a manual transmission.

  From the viewpoints of environmental considerations and energy savings, in order to reduce exhaust gas and fuel consumption during idling, the engine is automatically stopped when the vehicle is stopped, idling is prohibited, and then the accelerator is operated. Patent Document 1 discloses an automatic idle stop vehicle that automatically restarts an engine when a restart operation is detected.

The conventional automatic idle stop vehicle employs an automatic transmission, so that the gear position is automatically shifted down when the vehicle decelerates, and automatically returns to the neutral position when the vehicle stops. When the engine is restarted and the engine speed increases, the transmission is automatically shifted up from the neutral position according to the engine speed and vehicle speed, so the driver does not have to be aware of the clutch operation. .
JP 2002-235574 A

  In a vehicle equipped with a manual transmission, the gear position is maintained unless a speed change operation is performed even if the vehicle speed decreases. Therefore, when the conventional automatic idle stop function is applied as it is to a vehicle equipped with a manual transmission, the engine is automatically stopped even when the gear position is other than the neutral position and the hand clutch is not being gripped.

  Similarly, when the engine is restarted, if the gear position is other than the neutral position and the clutch is kept engaged, a so-called “push” state occurs, and the load on the starter motor increases.

  An object of the present invention is to solve the above-described problems of the prior art and to provide an automatic idle stop vehicle that can smoothly stop and restart the engine smoothly even in a vehicle equipped with a manual transmission.

The object of the present invention is to solve the above-mentioned problems of the prior art, and in an automatic idle stop vehicle equipped with a manual transmission and automatically stopping the engine under a predetermined condition when the vehicle is stopped, the following measures are taken. There is a feature.
(1) A clutch that transmits the output of the engine to the manual transmission, a clutch lifter shaft that disconnects or connects the clutch according to the rotation direction, an actuator that rotates the clutch lifter shaft, and a response to the clutch operation A link mechanism for rotating the clutch lifter shaft, a position sensor for determining a gear position, a hand clutch sensor for detecting a hand clutch operation, and the clutch is disconnected by a hand clutch when a predetermined idle stop condition is satisfied. Control means for energizing the actuator to rotate the clutch lifter shaft to the clutch disengagement position and then stopping the engine when the gear position is other than neutral. .
(2) A brake sensor for detecting a brake operation is further provided, and the control means is operated when a predetermined engine restart condition is satisfied, and the clutch is disengaged by the hand clutch, or When the gear position is neutral, the engine is started, and the actuator is energized to rotate the clutch lifter shaft to the clutch connection position.

According to the present invention, the following effects are achieved.
(1) According to the invention of claim 1, when the idle stop condition is satisfied, if the clutch is not disengaged by the hand clutch and the gear position is other than neutral, the clutch is disengaged by the actuator, Since the engine is automatically stopped, the engine can be smoothly automatically stopped even if the driver neglects the operation of separating the engine and the drive system.
(2) According to the invention of claim 2, even if the engine restart condition is satisfied in the idling stop state, the brake is not operated or the clutch is disengaged by the hand clutch even if the brake is operated. If not, or if the gear position is other than neutral, the actuator will not engage the clutch. Therefore, the engine is not started in a state where it is connected to the drive system.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall side view of a motorcycle according to an embodiment of the present invention, in which an engine is stopped in response to a predetermined stopping condition and then restarted in response to a predetermined starting operation. The system is installed.

  The vehicle body frame 1 includes a main frame 3 and a lower frame 19 that extend rearward from the head pipe 2, and a rear frame 5 that is coupled to the main frame 3 on the way. The main frame 3 and the lower frame 19 are coupled to each other at the lower end, and are coupled to each other at the upper portion by the stay 6. The rear frame 5 and the main frame 3 are coupled to each other by a stay 7. A steering shaft 18 is rotatably supported on the head pipe 2, and a front fork 4 is coupled to a lower end portion of the steering shaft 18. A front wheel Wf is attached to the lower part of the front fork 4 and a handle 14 is provided on the upper part.

  A fuel tank 8 and a seat 9 are placed on the main frame 3 and the rear frame 5. The power unit 10 is disposed in a space surrounded by the main frame 3 and the lower frame 19. The power unit 10 is suspended from the main frame 3 and the lower frame 19 by brackets 11, 12, and 13. An arm 16 that supports the rear wheel Wr is supported at one end on the pivot 20 near the lower end of the main frame 3.

  2 and 3 are cross-sectional views of the power unit 10 mounted on the motorcycle. The power unit of the present embodiment is configured by integrating the engine E and the multi-stage transmission M, and both are connected via a transmission clutch mechanism S. 2 and 3 respectively show the structures of the engine E side (FIG. 2) and the multi-stage transmission M side (FIG. 3) with the crankshaft 52 interposed therebetween.

  The engine E includes a crankshaft 52 rotatably supported by bearings 51a and 51b with respect to the unit case 50, a piston 55 slidably fitted in a cylinder bore of the cylinder block 53, and the piston 55. A connecting rod 54 connected to the crankshaft 52 is a main component. A cylinder head (not shown) is mounted on the cylinder block 53. The magnet rotor 31 of the generator 30 is fixed to one end of the crankshaft 52 (the left end in FIGS. 2 and 3), and the stator 32 covers the generator 30 and the crankcase. It is supported by a left side cover 33 joined to the left end surface.

  The unit case 50 further supports an input shaft 60 and an output shaft 61 of the multi-stage transmission M in parallel with the crankshaft 52 by ball bearings 56a and 56b and 57a and 57b, respectively. A main transmission gear group M1 is disposed on the input shaft 60, and a clutch lifter shaft 88 (to be described later) and the crankshaft are connected to a shaft end portion (right shaft end portion in FIG. 3) via a transmission clutch mechanism S. 52 is connected, and the power of the crankshaft 52 is transmitted to the input shaft 60 via the transmission clutch mechanism S in accordance with the operation of the clutch lifter shaft 88.

  The output shaft 61 is provided with a counter transmission gear group M2 that meshes with the main transmission gear group M1, and the power after the shift obtained by the engagement between the main transmission gear group M1 and the counter transmission gear group M2 is The final reduction gear provided at the shaft end of the output shaft 61 (left shaft end in FIG. 3) is transmitted to the rear wheel Wf, which is the drive wheel, via the sprocket 48 and the transmission chain 49.

The transmission clutch mechanism S includes a bottomed cylindrical clutch outer 71 that is rotatably supported with respect to the input shaft 60, and has a small-diameter drive fixed to the crankshaft 52 on the outer surface of the bottom portion. A large-diameter driven gear 74 that meshes with the gear 73 is attached, and the drive gear 73 and the driven gear 74 constitute a primary reduction gear.
A cylindrical clutch inner 76 that is spline-fitted to the input shaft 60 and fixed by a nut 75 is disposed inside the clutch outer 71, and is slidably engaged with the peripheral wall of the clutch inner 76. The plurality of driven friction plates 77 and the plurality of driven friction plates 78 slidably engaged with the peripheral wall of the clutch outer 71 are alternately stacked. A pressure receiving plate 79a provided integrally with the clutch inner 76 is opposed to the driving friction plate 77 located on the outermost side of the friction plates 77 and 78, and the clutch inner is provided on the driving friction plate 77 located on the innermost side. A pressure plate 79b supported so as to be slidable with respect to 76 is disposed. A plurality of support bosses 80 (only one of which is shown in FIG. 3) that protrude through the end wall of the clutch inner 76 are integrally formed on one side surface of the pressure plate 79b. A release plate 81 is fixed to the tip of 80 by a bolt 82. A clutch spring 83 is contracted between the release plate 81 and the clutch inner 76.

  One end of a link member 85 is rotatably attached to the release plate 81 via a release bearing 84, and the other end of the link member 85 is connected to a clutch lifter shaft 88. The clutch lifter shaft 88 is pivotally supported with respect to the unit case 50, and a return spring 94 is engaged with one of the shaft ends (upper side in FIG. 3), and a clutch wire is engaged with the other shaft end. A clutch arm 86 to be coupled with (not shown) is mounted. Further, a link lever 93 is splined to the clutch lifter shaft 88, and a cam gear 95 is rotatably supported. The clutch lifter shaft 88 is rotated forward and backward by the clutch actuator 87 provided in the unit case 50 via the gear trains 90, 91, 92, 95 and the link lever 93.

  4, 5, and 6 are views showing the operations of the gear trains 91, 92, 95 and the link lever 93.

  As shown in FIG. 4, in the clutch connected (on) state where the clutch lifter shaft 88 is returned by the return spring 94, the pressure plate 79 b receives the friction plates 77 and 78 group by the resilient force of the clutch spring 83. Since it presses against 79a, the drive friction plate 77 and the driven friction plate 78 frictionally couple each other. Therefore, engine power is transmitted from the crankshaft 52 to the input shaft 60 via the primary reduction gear and the clutch mechanism S, and further to the rear wheel Wf via other transmission elements.

  When the clutch actuator 87 is urged in the clutch disengagement direction from the clutch connected state and the pinion gear 90 rotates in the forward direction, this driving force is transmitted to the cam gear 95 via the gears 91 and 92, so the clutch lifter shaft 88 Is rotated in the direction of the arrow against the elastic force of the return spring 94. As a result, the release plate 81 is pressed by the link member 85 via the release bearing 84. The pressed release plate 81 retracts the pressure plate 79b while compressing the clutch spring 83, so that the frictional coupling between the driving friction plate 77 and the driven friction plate 78 is released, and the clutch is disconnected, and input from the crankshaft 52 is performed. The power transmission to the shaft 60 is cut off. When the rotation of the clutch lifter shaft 88 further proceeds, as shown in FIG. 5, the first limit switch 46 is switched while the clutch is disengaged, so that the clutch actuator 87 stops.

  On the other hand, when the clutch actuator 87 is urged in the reverse rotation direction from the clutch disengaged state shown in FIG. 5, this driving force is transmitted to the cam gear 95 via the gears 90, 91, 92, so that the clutch lifter shaft 88 is It is rotated in the reverse direction. As a result, the pressure plate 79b moves forward by the elastic force of the clutch spring 81 and presses the friction plates 77 and 78 against the pressure receiving plate 79a and pushes back the release plate 81, so that the clutch returns to the connected state. be able to. When the cam gear 95 is rotated to the clutch engagement position in FIG. 4 and the second limit switch 47 is switched, the clutch actuator 87 is stopped.

When the hand clutch is operated from the clutch connected state of FIG. 4 and the clutch arm 86 is pulled in the direction of the arrow, the clutch lifter shaft 88 is disengaged regardless of the position of the cam gear 95 as shown in FIG. It is rotated to the position . That is, the cam gear 95 is formed with a long hole 95a coaxially with the clutch lifter shaft 88, and even if the link lever 93 rotates together with the clutch lifter shaft 88, the engaging portion 93a of the link lever 93 has a long hole 95a. Since the link lever 93 and the cam gear 95 are not engaged only by moving from one end side (FIG. 4) to the other end side (FIG. 6), the cam gear 95 and the gears 90, 91, 92 do not rotate. Therefore, the operation load of the clutch lever is reduced.

  FIG. 7 is a block diagram showing a configuration of an automatic idle stop system applied to this embodiment, and the same reference numerals as those described above represent the same or equivalent parts.

  A battery 22 is connected to the ECU via a starter relay 21. A drive current is supplied from the battery 22 to the injector 35, the fuel pump 36, and the ignition device 37 via the main fuse 23 and the main switch 24.

  The ECU further includes a hand brake switch 41 for detecting that the hand brake is operated, a foot brake switch 42 for detecting that the foot brake is operated, and a hand clutch for detecting that the hand clutch is operated. A switch 43, a vehicle speed sensor 44 for detecting a traveling speed, a gear position sensor 45 for detecting a gear position, a first limit switch 46 and a clutch for detecting that the clutch lifter shaft 88 is rotated to a clutch disengaged position. And a second limit switch 47 that detects that the connection position has been turned. The ECU is also connected with a TW sensor that detects the coolant temperature, a Ne sensor that detects the engine speed Ne, and the like, but illustration of a configuration that is not necessary for the description of the present invention is omitted here.

  FIG. 8 is a flowchart showing the clutch control procedure in this embodiment. In step S10, it is determined whether or not the engine is stopped. If the engine is being started, the process proceeds to step S11 to determine whether or not a predetermined idle stop condition is satisfied. In the present embodiment, the idle stop condition is set in advance that the gear position is neutral or the brake is in an ON state.

  If the idle stop condition is satisfied, the process proceeds to step S12, and based on the state of the hand clutch switch 43, it is determined whether the hand clutch is operated and the clutch S is in a disengaged state. In the present embodiment, when the hand clutch switch 43 is on and the clutch S is in a disconnected state, the routine jumps to step S17 and the engine is immediately stopped. On the other hand, if the hand clutch switch 43 is off and the clutch is in the engaged state, the process proceeds to step S13.

  In step S13, the gear position detected by the gear position sensor 45 is determined. If neutral, the process jumps to step S17 and the engine is immediately stopped. On the other hand, if the gear position is other than neutral, the process proceeds to step S14, and the actuator 87 is rotated forward in the clutch disengagement direction. In step S15, it is determined whether or not the first limit switch 46 has been switched. When switching of the first limit switch 46, that is, clutch disconnection is confirmed, the actuator 87 is stopped in step S16. In step S17, energization to the ignition device 37 and the injector 35 is stopped, and the engine is automatically stopped.

  On the other hand, if it is determined in step S10 that the engine is stopped, the process proceeds to step S20, and it is determined whether or not a predetermined engine restart condition is satisfied. If the restart condition is satisfied, the process proceeds to step S21, and it is determined based on the state of the brake switches 41, 42 whether the braking force is applied. In this embodiment, when it is determined that at least one of the brake switches 41 and 42 is on and braking force is applied, the process proceeds to step S22, and the hand clutch is operated based on the state of the hand clutch switch 43. It is then determined whether or not the clutch is disengaged. If the clutch is disengaged, the process proceeds to step S24 and the engine is immediately restarted. On the other hand, if the clutch is engaged, the process proceeds to step S23 where the gear position is determined. If the gear position is neutral, the process proceeds to step S24, and the engine is restarted.

  In step S25, the actuator 87 is reversed in the clutch engagement direction. In step S26, it is determined whether or not the second limit switch 47 has been switched. When switching of the second limit switch 47, that is, clutch engagement is confirmed, the actuator 87 is stopped in step S27.

1 is an overall side view of a motorcycle according to an embodiment of the present invention. FIG. 2 is a cross-sectional view (No. 1) of a power unit mounted on the motorcycle of FIG. 1. FIG. 3 is a sectional view (No. 2) of the power unit mounted on the two-wheeled vehicle of FIG. 1. It is FIG. (1) for demonstrating the motion of the link mechanism which rotates a clutch lifter shaft with an actuator. It is FIG. (2) for demonstrating the motion of the link mechanism which rotates a clutch lifter shaft with an actuator. It is FIG. (3) for demonstrating the motion of the link mechanism which rotates a clutch lifter shaft with an actuator. It is a block diagram of an automatic idle stop system. It is the flowchart which showed the control procedure of a clutch.

Explanation of symbols

  50: Unit case 52: Crankshaft 60 ... Input shaft 71 71 Clutch outer 76 76 Clutch inner 77 Drive friction plate 78 Drive friction plate 79a Pressure receiving plate 79b Pressure plate 81 Release Plate, 83 ... Clutch spring, 84 ... Release bearing, 85 ... Link member, 88 ... Clutch lifter shaft, 90, 91, 92, 95 ... Gear train, 93 ... Link lever, 94 ... Return spring

Claims (4)

In an automatic idle stop vehicle equipped with a manual transmission and automatically idling is prohibited by stopping the engine automatically under certain conditions when stopping
A clutch that transmits the engine output to the manual transmission;
A clutch lifter shaft that disconnects or connects the clutch according to the rotation direction;
An actuator for rotating the clutch lifter shaft;
A hand clutch for inputting a manual operation on the clutch;
A clutch arm that rotates the clutch lifter shaft in a direction of a clutch disengagement position in response to an operation of the hand clutch;
A gear mechanism including at least one gear and transmitting the driving force of the actuator to the clutch lifter shaft;
A position sensor to determine the gear position;
A hand clutch sensor for detecting an operation of the hand clutch;
If the clutch is not disengaged by the hand clutch and the gear position is other than neutral when a predetermined idle stop condition is satisfied, the actuator is energized to rotate the clutch lifter shaft to the clutch disengagement position. Control means for causing the engine to stop automatically ,
A spring member for biasing the clutch lifter shaft in the clutch connection direction,
The gear mechanism is
A link lever splined to the clutch lifter shaft;
Including a cam gear rotatably supported on the clutch lifter shaft,
The cam gear is formed with an elongated hole coaxially with the clutch lifter shaft,
The link lever engages with the cam gear in the slot,
When the clutch lifter shaft at the clutch connection position is rotated by the clutch arm in the direction of the clutch disengagement position, the engaging portion of the link lever moves in the elongated hole, and when the actuator is rotated in the clutch disengagement direction, the link lever An automatic idle stop vehicle characterized in that the engagement portion engages with the end portion of the elongated hole to rotate the clutch lifter shaft in the direction of the clutch disengagement position . A brake sensor for detecting a brake operation;
The control means starts the engine when a brake operation is performed when a predetermined engine restart condition is satisfied and the clutch is disengaged by the hand clutch, or when the gear position is neutral, 2. The automatic idle stop vehicle according to claim 1, wherein the actuator is energized to rotate the clutch lifter shaft to a clutch connection position.   3. The automatic idle stop vehicle according to claim 2, wherein when the vehicle is stopped and the gear position is neutral or a brake operation is performed, the engine is automatically stopped and idling is prohibited. A first limit switch for detecting that the clutch lifter shaft is rotated to a clutch disengagement position;
  A second limit switch for detecting that the clutch lifter shaft has been rotated to the clutch engagement position;
  The automatic idle stop vehicle according to claim 1, wherein the cam gear performs switching of the first and second limit switches.

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