JPH0618059Y2 - Engine restart device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an engine restart device.

[Prior Art] As shown in FIG. 9, a flywheel (hereinafter referred to as a first flywheel) 1 connected to a crankshaft 16
In the conventional device in which the crankshaft 16 is rotationally started by a starter (not shown) via the ring gear 18 provided on the No. 7, the battery is exhausted and the life of the starter, the ring gear 18, etc. is shortened.

On the other hand, a device is known in which the second flywheel collects brake energy and releases it when the engine is restarted (for example, Japanese Utility Model Laid-Open No. 61-14233). An example thereof will be described with reference to FIG. 10. A first flywheel 17 connected to the crankshaft 16 is provided with a second flywheel 20 rotatably supported by the crankshaft 16 via bearings 19, and an electromagnetic coil 22. And the movable iron piece 23 are selectively connected via an electromagnetic clutch 21. When braking, the second flywheel 2
0 is connected to the first flywheel 17 to recover the braking energy to the second flywheel 20 in the form of rotational force, the second flywheel 20 is left idle when the vehicle is stopped, and the second flywheel 20 is restarted. The flywheel 20 is connected to the first flywheel 17 to release the rotational force of the second flywheel 20 and restart. But the second
Since the flywheel 20 of 1 rotates with the first flywheel 1: 1, in order to obtain the rotational force required for restarting, when both flywheels 17 and 20 have the same diameter, the second flywheel 17 There is a problem that the thickness A of 20 becomes large, the apparatus becomes large and heavy, and the fuel efficiency deteriorates.

Further, Japanese Utility Model Laid-Open No. 59-6646 discloses a device provided with an auxiliary motor for driving the second flywheel, but the structure and drive control are complicated.

As another conventional technique, there is Japanese Patent Laid-Open No. 56-104150.
The publication discloses an engine restarting device including first and second flywheel devices and a planetary gear device having a planet body and a sun body. However, in this technique, since the first and second flywheel devices are arranged independently from the planetary gear device, the same problem as in the above-described conventional technique, that is, the length dimension of the housing Of the vehicle, the mountability of the vehicle deteriorates, the weight of the vehicle increases, the running performance or acceleration performance of the vehicle deteriorates, the loading performance of the vehicle deteriorates, and the like.

[Object of the Invention] The present invention has been proposed in view of the above-mentioned problems of the prior art, and an object thereof is to provide an engine restart device that can achieve a reduction in size and weight.

[Structure of the Invention] An engine restart device of the present invention includes a first flywheel connected to a crankshaft, and a solar body that is interlocked with a plurality of planetary bodies pivotally supported by the first flywheel. A second flywheel and a braking device for braking the planetary body via a ring body, and a pin is erected on the crankshaft side surface of the first flywheel, and the pin is attached to the planetary body. The sun roller, which also functions as a pin of the planetary roller and is interlocked with the planetary roller, is constituted by the boss portion of the second flywheel, and is adjacent to the planetary device including the planetary body and is located on the crankshaft side of the second planetary device. A flywheel is arranged, the braking device has a member for braking the cylindrical ring body of the planetary device, and a ring gear is provided on the outer circumference of the first or second flywheel, A starter pinion that meshes with the gear is provided.

In implementing the present invention, it is preferable that the planetary body, the sun body, and the cylindrical ring body are respectively composed of a planetary roller, a sun roller, and a ring having a smooth inner circumference, or a planetary gear, a sun gear, and an internal gear are used. It is preferable to configure.

In implementing the present invention, the braking device includes a shoe brake device that presses the outer periphery of the cylindrical ring body, a disc brake device that holds a disc protruding from the outer periphery of the cylindrical ring body, and an outer periphery of the disc body. It is preferable to use a tightening band brake device.

[Advantage of the Invention] According to the engine restarting device of the present invention having the above-described structure, the cylindrical ring body idles while the vehicle is traveling, and the second flywheel is more than the first flywheel. Spin at low speed. Therefore, the engine inertia is small and the acceleration response is good.

During braking, the cylindrical ring body is braked to connect the second flywheel to the first flywheel. As a result, the first flywheel is decelerated, the second flywheel is accelerated, and the braking energy is collected in the form of rotational force by the second flywheel.

At this time, the rotation ratio between the second flywheel and the first flywheel is the sum (for example, 3) of the diameter (for example, 1) of the second flywheel and the inner diameter (for example, 2) of the cylindrical ring body, It is a ratio (eg 3) to the diameter of the second flywheel (eg 1). Therefore, the thickness of the second flywheel is reduced to 1/9 as compared with the conventional device in which both flywheels have the same diameter, and the reduction in size and weight is achieved.

While stopped, the engine can be stopped to reduce idling and improve fuel efficiency. Then, when the cylindrical ring body idles, the second flywheel rotates in the opposite direction to the cylindrical ring body.

At the time of restart, the cylindrical ring body is braked, the second flywheel is connected to the first flywheel, the rotational force of the second flywheel is released, and the engine is started. When the engine starts and the number of revolutions increases, the cylindrical ring body is spun and the second flywheel is separated from the first flywheel.

Further, in the present invention, since the ring gear is provided on the outer periphery of the first or second flywheel and the starter pinion that meshes with the ring gear is provided, in an emergency,
By rotating the starter pinion by various driving means, restart can be performed easily and surely.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, a first flywheel c is connected to a crankshaft 2 in a flywheel housing 1 by flywheel bolts. A plurality of (six in the illustrated example) planetary rollers p, which are planetary bodies, are pivotally supported on the first flywheel c via pins 4. The second flywheel 5 including the sun roller s, which is a solar body that interlocks with the planetary rollers p, is rotatably supported by the boss portion of the first flywheel c via a bearing 10.

Here, the planetary roller p, which is a planetary body, and the sun roller s, which is a solar body, constitute the above-mentioned “planetary device”.

Further, a thin ring i, which is a ring body, is slidably contacted with the outer periphery of the planetary rollers p, p, ... That is, two brake shoes b, b are provided on the outer periphery of the ring i so as to face each other. The brake shoes b, b are connected to the actuator 7 via the lever 6, and the ring i is pressed by the extension operation of the actuator 7. To brake and set the second flywheel 5 to the first
It is designed to be connected to the flywheel c.

Further, a ring gear 8 for emergency starting is provided on the outer periphery of the second flywheel 5, and a starter pinion 9 that meshes with the ring gear 8 is provided.

Next, the operation will be described mainly with reference to FIGS. 3 to 8. In these drawings, the arrow indicates the peripheral velocity vector, ω indicates the angular velocity, and tan θ indicates the angular velocity ω. In FIG. 8, the chain line L1 is the rotation speed of the second flywheel 5, and the alternate long and short dash line L2 is the rotation speed of the first flywheel. , Solid line L3 indicates the vehicle speed.

During traveling (mode C), the ring i is idled as shown in FIG. Therefore, the second flywheel s (for explanation, the operation of the second flywheel is explained by the sun roller s).
Is separated from the first flywheel c and spins at a speed lower than that of the first flywheel c (time T1 in FIG. 8).
T2).

During braking (mode A), as shown in FIG. 6, the actuator 7 is extended to brake the ring i and connect the second flywheel s to the first flywheel c. As a result, the first flywheel c is decelerated, the second flywheel s is accelerated, and the braking energy is collected in the form of rotational force by the second flywheel s (time T2).
~ T3). At this time, as shown in FIG. 4, the rotation ratio of the second flywheel s and the first flywheel c (ωII
/ ΩI) is ωII / ωI = tan θII / tan θI = Ds + Di / Ds where Ds is the diameter of the sun roller s (for example, 1) and Di is the inner diameter of the ring (for example, 2), then ωII / ωI = (1 + 2) / 1 = 3, and the speed of the second flywheel s is increased three times that of the first flywheel c. Therefore, the thickness A of the second flywheel 5 is as thin as 1/9, and the size and weight of the second flywheel 5 are smaller than those of the conventional device in which both flywheels have the same diameter.

As shown in FIG. 7, while the vehicle is stopped (mode B), the engine can be stopped and the idling can be deleted to improve the fuel consumption. When the ring i idles, the second flywheel s is replaced with the ring i. Spin in the opposite direction (time T3 ~ T
4).

At restart (mode A), as shown in FIG.
Is braked to connect the second flywheel s to the first flywheel c and release the rotational force of the second flywheel s to start the engine via the first flywheel c. Then, when the engine starts and the engine speed increases, the mode shifts to the mode C shown in FIG. 5 (time T4 to T
5).

[Advantages of the Invention] As described above, according to the present invention, the speed of the second flywheel is increased more than that of the first flywheel, and
It is possible to reduce the size and weight of the second flywheel.
The length of the housing does not increase and the weight of the vehicle does not increase due to the fact that the second flywheel does not increase in size. Therefore, the running performance and acceleration performance of the vehicle deteriorate. There is also no. Further, the mountability and loading performance on the vehicle are not deteriorated.

Further, during braking, the braking energy is collected in the form of rotational force by the second flywheel, and during restart, the rotational force is released and the engine is started via the first flywheel to reduce battery consumption. It can be prevented.

When the vehicle is stopped, the engine can be stopped to reduce idling and improve fuel efficiency.

Furthermore, in an emergency, restarting can be performed easily and reliably by rotating the starter pinion by various driving means.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line XX of FIG. 1, and FIGS. 3 and 4 are side views and front views for explaining the operation. FIGS. 5, 5, 6 and 7 are vector diagrams for explaining the action. Diagrams of mode C, mode A and mode B, and FIG. 8 are rotational speeds of both flywheels for explaining the action. FIG. 9 and FIG. 10 are side sectional views showing different conventional devices. b, b1 ... Brake shoe, c, c1 ... First flywheel, i, i1 ... Ring, p ... Planetary roller,
p1 ... planetary gear, s ... sun roller, s1 ... sun gear, 2 ... crankshaft, 5 ... second flywheel, 7 ... actuator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, written by Kitamura, 1-chome, Ii-chome, Ageo-shi, Saitama, Nissan Diesel Industry Co., Ltd. (72) Keiichi Niimura, 1-chome, Io-chome, Ageo, Saitama Prefecture (56) References JP 56-104150 (JP, A) JP 59-58157 (JP, A) JP 57-108434 (JP, A) JP 57-159956 (JP, A) A)

Claims (1)

[Scope of utility model registration request] 1. A first flywheel connected to a crankshaft, a second flywheel including a solar body interlocking with a plurality of planet bodies pivotally supported by the first flywheel, and a ring body. And a braking device for braking the planetary body via a pin, the pin is erected on the crankshaft side surface of the first flywheel, and the pin is also used as the pin of the planetary roller of the planetary body. The sun roller that interlocks with the roller is constituted by the boss portion of the second flywheel, and the second flywheel is disposed adjacent to the planetary device including the planetary body and on the crankshaft side thereof, and the braking The device has a member for braking a cylindrical ring body of a planetary device, a ring gear is provided on the outer circumference of the first or second flywheel, and a starter pinion that meshes with the ring gear is provided. Engine restart and wherein the digit.