JPH05937U - Engine crank angle detector installation structure - Google Patents

Abstract

(57) [Abstract] [Purpose] Simple disk and sensor for detector configuration for the power unit reinforcement part of the structure where opening windows such as service holes are provided at the connection part to the converter housing at the rear end of the lower block. It is installed with a simple structure and prevents dust and water from adhering to it. [Structure] A detector constituting disk 27 is attached to an end of a crankshaft in a converter housing 8, and a crank angle sensor 28 is attached to a stiffener 20 which covers the opening window 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  According to the present invention, a reinforcing member having a connecting portion to a mission case is a cylinder block. A device for detecting the crank angle is installed in the power unit reinforcement part arranged at the lower end of the It relates to a mounting structure.

[0002]

[Prior art]

  Conventionally, as a structure for mounting a device for detecting a crank angle, for example, a crankshaft A disc for detector configuration is mounted outside the front of the crank pulley at the front end of the And the crank angle sensor facing it is located outside the engine body. Structures mounted on the surface are generally known.

[0003]   Further, as disclosed in Japanese Utility Model Laid-Open No. 57-52606, it is interlocked with the crankshaft. A disk is attached to the pulley of the fuel injection pump, and the sensor facing it is It was fixed to the engine wall and covered with a dust cover. The structure is also known.

[0004]

[Problems to be solved by the device]

  However, in the former structure, the front of the crankshaft crank pulley and the On the outer surface of the corresponding engine body, It is necessary to install it, and if the disc and sensor are exposed to the outside, dust, water, etc. Adhesion will adversely affect the detection performance. Also, in the latter structure, the disc Dust and the like are prevented from sticking to the sensor and the sensor. It needs to be provided separately.

[0005]   This invention solves the above-mentioned problem, and has a simple structure, yet has a detector structure. Prevents dust and water from adhering to the working disc and sensor, and improves reliability. It is an object of the invention to provide an engine crank angle detection device mounting structure that can be enhanced. Target

[0006]

[Means for Solving the Problems]

  In order to achieve the above object, the present invention provides a reinforcing member at the lower end of the cylinder block. A connection that is provided on one end side of the reinforcing member in the crankshaft direction and spreads in the radial direction of the crankshaft. A portion is formed, the connecting portion is connected to a peripheral portion of the mission case, and the connecting portion is formed. Crankshaft end in the mission case in the structure with an opening window A cover for mounting the detector configuration disk on the above part and covering the opening window Mount the crank angle sensor so that it faces the above-mentioned detector configuration disk. It is configured as described above.

[0007]   In this configuration, a portion that constitutes the cover that covers the opening window and the reinforcing portion A stiffener that is integrally provided with the cylinder block and the stiffener The crank angle sensor is connected to this stiffener. It is preferably fixed.

[0008]

[Action]

  According to the above configuration, the opening of the connecting portion is covered to close the inside of the mission case. The cover provided for this purpose is used for mounting the crank angle sensor, Without the need for a special mounting member or cover member for the disk and sensor, The disk and sensor are mounted in a specified positional relationship, and to the mounting location The ingress of dust and the like is prevented.

[0009]   Moreover, if the sensor is attached to the stiffener, Strength is increased.

[0010]

【Example】

  An embodiment of the present invention will be described with reference to the drawings.   1 is a block diagram of an engine including a structure according to an embodiment of the present invention. The connection part with the option case is shown. In this figure, 1 is a cylinder block The crankshaft 2 is arranged in the lower crankcase. This club The crankshaft 2 has a bearing portion 3 formed in the lower portion between the cylinders of the cylinder block 1. It is rotatably supported by the bearing cap 4 fixed to it, and It is connected to a piston 5 in the cylinder via a connecting rod 6.

[0011]   A transmission case is connected to the rear end of the cylinder block 1 in this embodiment. Is a converter housing 8 that forms a part of a transmission case of the automatic transmission 7. Are connected. The end of the crankshaft 2 in the converter housing 8 The drive plate 9 is connected to the drive plate with bolts 10. 9 and the torque converter 11 are connected by a bolt 12.

[0012]   Further, a lower block 14 as a reinforcing member is provided at the lower end of the cylinder block 1. It is arranged. As shown in FIGS. 3 and 4, the lower block 14 is And the side wall of the cylinder cap 1 are connected to each other. In addition, the rear end is integrally provided with the connecting portion 15 to the converter housing 8. It The connecting portion 15 is spread in a radial direction in a substantially semicircular shape, and is provided at a plurality of peripheral portions thereof. Has a bolt insertion hole 16 and is connected to the peripheral edge of the converter housing 8 with a bolt. It is supposed to be. Further, the lower block 14 is provided with an anti-misalignment with the connecting portion 15 A plurality of substantially triangular ribs 17 that are supported from the side of the rib are integrally formed.

[0013]   At the lower center of the connecting portion 15, a space between two vertical ribs 17, 17 is removed. An opening window 18 is provided in the shape. This opening window 18 is connected to the drive plate 9 and the door. A server for enabling the fastening operation of the bolt 12 that connects with the Luk converter 11. Has the role of a screw hole.

[0014]   The opening window 18 is covered with a cover after the bolt fastening operation, and particularly in this embodiment, The stiffener 20 having the function of reinforcing this part in addition to the role of the cover is the lower It is attached to the block 14.

[0015]   The stiffener 20 reinforces the part that constitutes the cover that covers the opening window 18 and the stiffener 20. And a vertical plate portion that covers the opening window 18 (a portion that constitutes a cover). ) 21, a horizontal plate portion 22 connected to the L-shaped portion, and the vertical plate portion 21 and the horizontal plate portion 22 and a rib 23 having a substantially triangular shape that connects the inner portions 22 from the inside with each other. ing. Then, the vertical plate portion 21 is connected via the connecting portion 15 of the lower block 14 to the convertor. A bolt 24 also serving as a positioning tubular pin is provided on the lower peripheral edge of the housing 8. The horizontal plate portion 22 is connected to the two crank bearings via the lower block 14. It is connected to the bearing cap 4 with a bolt 25 at a corresponding position.

[0016]   On the reinforced part of such a power unit, the device for crank angle detection is as follows. (See the enlarged view of FIG. 3).

[0017]   At the end of the crankshaft 2 in the converter housing 8, a plurality of peripheral portions are provided. A disk-shaped detector-constituting disk 27 having a crank angle detection mark on the It is attached. The center of the disc 27 is located at the crankshaft end and the drive shaft. With the bolt 10 for connecting the drive plate, sandwiched between the rate 9 and It is fixed to the crankshaft 2.

[0018]   On the other hand, the crank angle is detected by detecting the mark on the disk 27. When the crank angle sensor 28 faces the periphery of the disk 27, the crank angle sensor 28 It is attached to the ifna 20. That is, of the vertical plate portion 21 of the stiffener 20, The sensor 28 is mounted on the side wall surface of the mission corresponding to the opening window 18. This sensor 28 penetrates into the converter housing 8 through the opening window 18. The stiffener 20 holds the disc 27 so as to face the outer periphery of the disc 27.

[0019]   The lead wire 29 of the sensor 28 serves as an anti-mission for the vertical plate portion 21 of the stiffener 20. The wall of the vertical plate portion 21 to the wall of the horizontal plate portion 22 along the rib 23. It extends in the direction of contacting the surface.

[0020]   According to the structure of this embodiment, the mounting portion of the drive plate 9 and the opening Utilizing the stiffener 20 provided for closing and reinforcing the mouth window 18, Birth configuration disk 27 and crank angle sensor 28 require special mounting members Easy to install without Then, the stiffener 20 closes the opening window 18. By being closed, the space where the disk 27 and the sensor 28 are located is outside The cover for covering the disk 27 and the sensor 28 as they are shielded from It is possible to prevent dust and the like from invading these locations without specially providing.

[0021]   Further, in order to improve the detection accuracy of the crank angle, the peripheral edge of the disk 27 and the sensor It is desirable to properly manage the gap with 28, but there is a reinforced part and rigidity is high. The sensor 28 is attached to the stiffener 20 If the sensor 28 has a high mounting strength and the sensor 28 is displaced after the mounting to change the above gap, Such a situation is prevented and the detection accuracy is improved.

[0022]   In the above embodiment, the converter housing 8 of the automatic transmission is provided on the rear end side of the engine. Are connected, and the drive plate 9 and the torque converter 11 are arranged inside thereof. It has a built-in structure, but when the transmission is a manual transmission The present invention can also be applied. In this case, the rear end of the cylinder block A lower housing is arranged, and the lower block is connected to this and the cylinder block. In this case as well, in order to be shared with the automatic transmission, drainage, etc. An opening window is formed at the connection at the rear end of the ablock, and this is covered with a stiffener. Be seen. Also in this case, as in the above embodiment, the detector configuration disk and And a crank angle sensor are attached.

[0023]   Further, in the above embodiment, the opening window 18 is covered with the stiffener 20. You may cover with a cover and attach the sensor to this. In addition, the cylinder The reinforcing member disposed at the lower end of the hook is not limited to the lower block shown in the above embodiment, Lupine may be used as a reinforcing member.

[0024]

[Effect of device]

  As described above, the structure of the present invention is a supplementary device installed at the lower end of the cylinder block. A connecting portion to the mission case is formed at the rear end of the strong member, and an opening window is formed in the connecting portion. In the structure where is provided, the detector configuration is provided at the crankshaft end in the mission case. Disc is attached, and the crank angle sensor is attached to the cover that covers the opening window. Since the sensor is attached, a simple structure without the need for special mounting members The above disc and sensor can be attached with the And reliably prevent dust and other foreign matter from entering the location where the sensor is placed, and increase reliability. be able to.

[0025]   In addition, in particular, the above-mentioned sensor is provided in a stiffener including a portion forming a cover and a reinforcing portion. When the is installed, the sensor mounting part has high rigidity It is also possible to improve the accuracy by keeping the gap between the sensor and the disk periphery constant. It can be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a power unit reinforcing portion including a structure according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part in the embodiment.

FIG. 3 is a view of a lower block and the like in the same embodiment as seen from the mission side.

FIG. 4 is a view of the lower block and the like as viewed from below.

[Explanation of symbols]

1 cylinder block 2 crankshaft 8 converter housing 14 Lower block 15 Connection 18 open windows 20 Stiffener 27 Detector configuration disk 28 Crank angle sensor

Claims (2)

[Scope of utility model registration request] 1. A reinforcing member is arranged at the lower end of a cylinder block, and a connecting portion is formed on one end side of the reinforcing member in the crankshaft direction so as to expand in the radial direction of the crankshaft, and the connecting portion is connected to a peripheral portion of a mission case. In addition, in the structure in which the opening window is provided in the connecting portion, the detector constituting disk is attached to the crankshaft end portion in the transmission case, and the cover for covering the opening window is provided with the detector forming portion. A crank angle detecting device mounting structure for an engine, wherein a crank angle sensor is mounted so as to face the disc. 2. A stiffener integrally provided with a portion that constitutes a cover that covers the opening window and a portion that reinforces the cover,
2. The crank angle detecting device mounting structure for an engine according to claim 1, wherein the crank angle sensor is fixed to the stiffener, the crank angle sensor being fixed to the cylinder block and the transmission case peripheral portion together with the reinforcing member.