JP6472048B2 - Internal combustion engine - Google Patents

Description

  The present invention relates to an internal combustion engine characterized by an oil filter mounting portion, and is particularly suitable for a vehicle (automobile) internal combustion engine.

  In an internal combustion engine, the oil filter is a consumable item, and is replaced when the filter element becomes dirty to some extent. There are various oil filter mounting positions and mounting postures, and in many cases, the oil filter is disposed in a horizontal posture or in an inclined posture so that the tip side becomes higher. As described above, as a problem when the oil filter is arranged in a horizontal posture or a tilted posture with a high tip end side, when the oil filter is removed, the oil accumulated in the oil filter flows out.

In this regard, Patent Documents 1 and 2 disclose that the oil filter mounting portion is provided with an oil receiving portion for collecting oil flowing out from the oil filter. In these Patent Document 1, the oil receiving portion to the accumulated oil from the oil discharge hole is adapted to flows downward, while, in Patent Document 2, the oil waiting reservoir to the oil receiving portion sucked by the suction pipe It is supposed to be. Further, in Patent Document 1, the oil receiving portion is positioned on the accessory drive belt in a plan view, and the oil discharge hole is closer to the engine body than the accessory drive belt.

Japanese Utility Model 3-10014 microfilm Japanese Patent No. 3284951

  In Patent Document 1, when the oil filter is removed, the oil flows down from the oil discharge hole of the oil receiving portion as it is, so that there is a problem that other members and the floor of the engine room become dirty. In order to prevent this, the oil filter is removed while receiving the oil flowing down from the oil discharge hole in the container. However, since the operator must use both hands, there is a problem that the work is troublesome.

In Patent Document 1, an oil filter mounting portion, are provided on one side surface parallel to the crankshaft of the engine body (cylinder block), the accessory drive belt of the engine body oil filter mounting portion is arranged If it is provided on one end surface on the other side, the oil discharge hole is located on the accessory driving belt, and there is a possibility that the oil will be applied to the accessory driving belt.

  On the other hand, although Patent Document 2 can prevent the oil from flowing down, it requires a suction means, so that there is a problem that the structure is complicated and the cost is increased.

  The present invention has been made to improve the current situation.

The invention of claim 1
“An oil filter mounting part to which an oil filter can be freely attached and detached is disposed on one end surface of the engine body on the side where an auxiliary machine driving belt driven by a crankshaft is arranged . It is provided to be located above a part of the circuit,
The oil filter mounting portion, the a mounting seat of the oil filter overlap, have an oil receiving portion that protrudes to the opposite side to the mounting seat or al the engine body, the oil receiving portion is recessed downward It is formed in a scoop shape and is inclined so that the bottom portion becomes higher toward the tip, so that oil can accumulate in the oil receiving portion, and if the accumulated oil overflows, it spills only from the tip. ''
It is the basic composition.

And, the invention of claim 1 is the above basic configuration,
"Tip of the oil receiving portion, across the circumferential circuit before Kiho drive belt and said engine body is located on the opposite side, further, the tip of the oil receiving portion, the oil is an oil receiving portion of An oil return prevention part is formed to prevent it from flowing to the bottom surface. ''
It is the composition.

The invention of claim 2
“ One end of the crankshaft protrudes outward from one end surface of the engine body, and an auxiliary machine driving belt for driving at least an alternator is wound around a crank pulley provided at one end of the crankshaft.
On one end surface of the engine body, an oil filter mounting portion to which an oil filter can be attached and detached is provided so as to be positioned above a part of a peripheral circuit of the auxiliary machine drive belt as viewed from the crank axis direction. oil filter mounting portion, the mounting seat for the oil filter overlaps the a mounting seat or al the engine body has an oil receiving portion that protrudes to the opposite side, the oil receiving portion is recessed downward scoop The oil spills from the tip only ”
In the basic configuration
“The entire oil receiving portion in the oil filter mounting portion is disposed on the opposite side of the engine body across the auxiliary drive belt that drives the alternator.”
It is the composition.

  In the present invention, even if oil flows out from the oil filter when the oil filter is removed, the oil is stored in the oil receiving portion. Therefore, it is not necessary to remove the oil filter while receiving the oil in the container one by one, and it is possible to prevent or suppress other members and the floor of the engine room from being stained with oil. In addition, since the oil accumulated in the oil receiving portion can be easily wiped off with a cloth or the like, post-processing is also easy. Further, since no suction means is required, the structure is simple and the cost is excellent.

  Generally, the amount of oil that flows out from the oil filter is small, and in many cases, the entire amount of oil that has flowed out is received by the oil receiver, but even if the amount of oil that flows out is large and overflows from the oil receiver, In the present invention, since the tip of the oil receiving part is located outside the engine main body with respect to the accessory drive belt, there is no problem that the accessory drive belt becomes dirty with the spilled oil.

  Now, in patent document 1, the front-end | tip part far from the attachment seat of an oil filter among oil receiving parts is only the structure of the inclined board. For this reason, if oil spills from the tip of the oil receiving portion of Patent Document 1, a part of the oil may flow along the lower surface of the oil receiving portion and may drop on the accessory drive belt.

  On the other hand, in claim 1, since the oil return preventing portion is formed at the tip of the oil receiving portion, the entire overflowing oil flows down directly from the tip of the oil receiving portion, and the oil is received by the oil receiving portion. The phenomenon of flowing along the lower surface of the part and dripping on the accessory drive belt does not occur.

In the second aspect of the invention, since the entire oil receiving portion protrudes outside the engine body across the auxiliary drive belt that drives the alternator , the oil overflowing from the oil receiving portion flows to the lower surface of the oil receiving portion. However, it does not flow directly above the accessory drive belt, and the accessory drive belt is not soiled. In particular, as in the embodiment, when the rear side of the mounting seat is recessed upward, the oil that has flowed down the lower surface of the oil receiving portion flows down from the lower end of the mounting seat, so the accessory drive belt becomes dirty. Can be reliably prevented.

  Further, in Patent Document 1, the mounting seat is located closer to the engine body than the accessory drive belt. Therefore, if the oil removal of the removed oil filter is insufficient, the oil dripped from the removed oil filter However, in the second aspect, the mounting seat is located on the outer side of the engine body with respect to the accessory drive belt, so that the oil filter removes the oil from the oil filter. Even if a drop falls, it does not get on the accessory drive belt.

  Now, a male screw cylinder into which the oil filter is screwed is projected on the mounting seat in the oil filter mounting portion, and an annular recess is generally formed around the male screw cylinder, and an oil return passage is formed in the male screw cylinder. In general, the oil inflow passage communicates with the annular recess.

  When the oil filter mounting part is manufactured separately from the engine body, both the oil return passage and the oil inflow passage are opened on the back surface of the oil filter mounting part, and these are the oil passages opened in the engine body. However, due to a problem in the arrangement of the oil filter mounting portion, the inlet and outlet of the oil inflow passage and the inlet and outlet of the oil return passage may be misaligned when viewed from the axial direction of the crankshaft. .

  When the passage where the inlet and the outlet are shifted in this way is formed, if the oil inflow passage and the oil return passage are parallel to the axis of the crankshaft, the lateral hole must communicate with the inlet side and the outlet side. The opening is closed with a screw-type plug or the like. However, this is troublesome and increases the manufacturing cost. In this regard, when the oil inflow passage and the oil return passage are formed in an inclined posture as in the embodiment, the oil inflow passage and the oil return passage can be formed without providing a lateral hole, and there is an advantage that the processing cost can be suppressed.

1 is an overall front view of an internal combustion engine according to an embodiment. It is a figure of the oil filter mounting bracket which concerns on embodiment, (A) is a perspective view, (B) is a front view. It is a figure which shows the oil filter mounting bracket of embodiment, (A) is a top view, (B) is a rear view. (A) is a cross-sectional view taken along the line IVA-IVA in FIG. 2 (B), and (B) is a cross-sectional view taken along the line IVB-IVB in FIG. 2 (B).

(1). Outline of Internal Combustion Engine Next, an embodiment of the present invention will be described with reference to the drawings. First, an outline of the internal combustion engine will be described with reference to FIG. FIG. 1 is a front view of the internal combustion engine as viewed from the direction of the crank axis, and the term indicating the direction defines a direction (crank axis direction) perpendicular to the paper surface of FIG. The vertical direction is the direction of gravity.

  The internal combustion engine of the present embodiment is a slant type mounted on a vehicle, and is greatly inclined so that the axis O1 of the cylinder bore forms an angle of about 30 ° with respect to the horizontal plane O2. The internal combustion engine includes a cylinder block 1 and a cylinder head 2 fixed to the top surface thereof. An oil pan 3 is fixed to the bottom surface of the cylinder block 1, and a cylinder head cover 4 is mounted on the top surface of the cylinder head 2. Is fixed.

  A front cover (chain cover) 5 is overlapped and fixed to one end surface of the cylinder block 1 and one end surface of the cylinder head 2, and the front cover 5 is interposed between the cylinder block 1 and the cylinder head 2. A timing chain (not shown) is arranged in the space formed in the above. The cylinder block 1, the cylinder head 2, and the front cover 5 constitute the core of the engine body (the cylinder head cover 4 and the oil pan 3 also constitute the engine body). The oil pan 3 is composed of two upper and lower members.

  One end portion of the crankshaft 6 protrudes from the front cover 5, and an accessory drive pulley 7 is fixed to the protruding end portion. In this embodiment, an alternator 8 and an air conditioner compressor 9 are provided as auxiliary machines, and these are driven by an auxiliary machine drive belt 10. Accordingly, the alternator 8 and the air conditioner compressor 9 are provided with pulleys 11 and 12, respectively.

  The air conditioner compressor 9 is disposed almost directly beside the accessory drive pulley 7, and the alternator 8 is disposed above the air conditioner compressor 9 and slightly on the side near the accessory drive pulley 7. Accordingly, the auxiliary machine drive belt 10 circulates in a substantially triangular shape when viewed from the front. The air conditioner compressor 9 is fixed to a fastening boss (not shown) provided on the oil pan 3 so as not to move.

  On the other hand, the alternator 8 has first and two bracket portions 13 and 14 sandwiching the rotation axis, which are connected to the first and second support portions 15 and 16 provided in the cylinder block 1. The first and second bolts 17 and 18 are fixed. In this case, the alternator 8 can be rotated around the first bolt 17, and therefore, the bolt insertion hole 19 of the second support portion 16 is formed in an arc shape around the first bolt 17. doing.

  An oil filter mounting bracket 22 for attaching an oil filter 20 as an example of an oil filter mounting portion is provided in a portion of the front cover 5 closer to the cylinder head 2 than the alternator 8 and above the outer circuit of the peripheral drive belt 10. Has been placed. In the present embodiment, a part of the front cover 5 constitutes a part of an oil pump, and an oil pump that also serves as a part of the front cover 5 is roughly indicated by reference numeral 23. A rotor (not shown) constituting the oil pump 23 is driven by the crankshaft 6.

(2) Details of Oil Filter Mounting Part Next, details of the oil filter mounting bracket 22 will be described with reference to the drawings of FIG. The oil filter mounting bracket 22 of the present embodiment is separate from the front cover 5 and is fixed to a pump housing portion 25 provided on the front cover 5 with bolts 26 (see FIG. 3). Needless to say, the front cover 5 is made of metal such as aluminum.

  Therefore, the oil filter mounting bracket 22 has a flange portion 27 that overlaps with the pump housing portion 25, and an arm portion 28 protrudes forward from the flange portion 27, so that the front end of the arm portion 28 is substantially a disc. A filter mounting seat 29 is provided, and an oil receiving portion 30 projects forward from the lower portion of the filter mounting seat 29. The arm portion 28 and the filter mounting seat 29 are connected by a reinforcing rib 31. The oil filter mounting bracket 22 is, for example, a resin molded product, and is integrally molded as a whole. Aluminum die-cast products can also be used.

  As clearly shown in FIG. 3 (B), the flange portion 27 has a substantially pentagonal shape that is horizontally long, and is fixed to the pump housing portion 25 with bolts 26 at the left and right. An oil inflow intermediate passage 32 and an oil return intermediate passage 33 are formed in an elongated shape on the rear surface (back surface) of the flange portion 27. The starting end of the oil inflow intermediate passage 32 communicates with an oil discharge port 34 provided in the pump housing portion 25, and the end of the oil return intermediate passage 33 communicates with an oil return port 35 provided in the pump housing portion 25.

  In the illustrated embodiment, the oil inflow intermediate passage 32 is located below and the oil return intermediate passage 33 is located above. However, depending on the internal structure of the pump housing portion 25, it may be configured upside down. Further, although the oil inflow intermediate passage 32 and the oil return intermediate passage 33 are inclined in substantially the same direction, these postures can be arbitrarily set by the internal structure of the pump housing portion 25. Note that an L-shaped indicator 22a in side view for visually confirming the rotation timing of the engine is provided on the front surface of the flange 27, but this is not related to the function of attaching the oil filter 20.

A male thread cylinder 36 into which the oil filter 20 can be screwed is projected at the center of the filter mounting seat 29, and an annular recess 37 is formed around the male thread cylinder 36. The male screw cylinder 36 is inclined by a slight angle θ with respect to the horizontal so as to become higher as it goes to the tip in a side view. Therefore, the filter mounting seat 29 is inclined backward by the same angle θ with respect to the vertical plane in a side view.

  As clearly shown in FIG. 4A, the inside of the male screw cylinder 36 is a starting end portion of the first oil return passage 38, and the end of the first oil return passage 38 is the start end of the second oil and the passage 39. The end of the second oil return passage 39 communicates with the start end of the oil return intermediate passage 33. While the oil return intermediate passage 33 is formed by molding, the first oil return passage 38 and the second oil return passage 39 can be formed by drilling, but both are inclined and communicated with each other by mere drilling. Can be formed into a state. Therefore, the side hole closed with the plug is not necessary, and the processing cost can be reduced accordingly.

  Furthermore, since the first oil return passage 39 is in a posture orthogonal to the end face of the male threaded cylinder 36, there is no drill sliding phenomenon during drilling. For this reason, it can process with high precision. Further, as shown in FIG. 4 (A), a portion of the inner surface of the oil return intermediate passage 33 where the second oil return passage 39 opens is formed by an inclined surface 33a orthogonal to the second oil return passage 39, thereby 2 Consideration is made so that drilling of the oil return passage 39 can be performed accurately. Since the inclined surface 33a is oriented in the mold release direction when the oil filter mounting bracket 22 is molded, there is no problem in molding. As shown in FIG. 3B, the second oil return passage 39 is slightly inclined with respect to the vertical line in the rear view.

  For example, as shown in FIG. 2B, the terminal end of the oil inflow passage 41 is opened in a portion of the annular recess 37 of the filter mounting seat 29 that is obliquely below the male screw cylinder 36. As shown in FIG. 4B, the oil inflow passage 41 is in a posture parallel to the first oil return passage 38, and the start end thereof communicates with the end of the oil inflow intermediate passage 32. The oil inflow passage 41 is also formed by drilling, but the drill strikes in a posture orthogonal to the annular recess 37, and can be easily drilled with high accuracy.

  Further, in the present embodiment, the heights of the start end and the end of the oil inflow passage 41 are changed due to the connection of each member and restrictions on the dimensions. The oil inflow passage 41 can be formed by simple drilling without need. That is, only one oil inflow passage 41 is sufficient even if the heights of the start end and the end end are different. This is an advantage of the present embodiment. The same applies to the oil return passages 38 and 39.

  The oil receiving portion 30 has a generally scoop-like shape. That is, in the plan view, the base end connected to the filter mounting seat 29 is wide and narrows toward the tip, and in the side view, the vertical interval decreases from the base end to the tip. The oil receiving portion 30 is provided in a region narrower than the lower half of the filter mounting seat 29.

  As clearly shown in FIG. 4, the bottom surface of the oil receiving portion 30 is in a posture parallel to the screw cylinder 38, and is therefore inclined so as to become higher toward the tip. Therefore, when oil flows out from the removed oil filter 20, the oil is accumulated in the oil receiving portion 30. Therefore, the oil floor does not contaminate the engine room floor and the members located below.

  A downward rib 42 is formed at the tip of the oil receiving portion 30 as an example of an oil return preventing portion. For this reason, the phenomenon in which oil flows along the lower surface of the oil receiving portion 30 in the state indicated by the dotted line in FIG. 4B does not occur. The same effect can be obtained by forming a groove extending in the circumferential direction on the lower surface of the front end portion of the oil receiving portion 30. That is, a groove can also be employed as the oil return preventing portion. The downward rib 42 may be curled.

  When the amount of oil flowing out to the oil receiving part 30 exceeds the capacity, the oil spills from the tip of the oil receiving part 30. In that case, it is preferable to prevent the oil from adhering to the lower surface of the rib 42 and improve the oil sharpness. Therefore, in the present embodiment, the V-shaped groove 43 is formed on the upper surface of the distal end portion of the oil receiving portion 30. When the V-shaped groove 43 is formed in this manner, the oil drips in a state where a thread is pulled, and therefore, the adhesion to the rib 42 can be prevented accurately.

  Further, in the present invention, as clearly shown in FIG. 2 (B), the tip of the oil receiving portion 30 (tip of the V-shaped groove 43) is one side in the left-right direction (right side in FIG. 2) from the male screw cylinder 38 in front view. The oil receiving portion 30 is displaced, and is a bulging portion 30a on the side where the tip is displaced. Accordingly, the oil receiving portion 30 has a left-right asymmetric shape when viewed from the front. And providing the bulging part 30a has the advantage that the amount of stored oil can be increased compared with the case where it forms in a symmetrical shape.

(3) Relationship between auxiliary machine drive belt and oil filter mounting bracket / others As shown in FIG. 3A and FIG. 4, the peripheral circuit of the auxiliary machine drive belt 10 has an arm portion 28 as viewed from the crank axis direction. It is located in the place of. For this reason, even if oil drops fall from the removed oil filter 20, this does not occur on the accessory drive belt 10.

  Further, since the arm portion 28 is located above the lower end of the filter mounting seat 29, there is no rib 42 at the tip of the oil receiving portion 30, and the oil is shown in FIG. Even if the oil flows backward along the lower surface of the oil receiver 30, the oil does not move behind the rear end of the oil receiver 30 (the lower end of the filter mounting seat 29). Since it always falls from the end when it goes to the end, the auxiliary machine drive belt 10 can be reliably prevented from getting wet with oil. This is one of the great advantages of this embodiment.

  In the present embodiment, the rib 42 is formed only at the tip of the oil receiving part 30, but it may be provided in the middle part before and after the oil receiving part 30, or may be provided at a plurality of front and rear parts. In the present embodiment, since the tip of the oil receiver 30 protrudes greatly from the accessory drive belt 10, it is easy to place an oil receiver container below the oil receiver 30. Also from this aspect, the engine room can be prevented from being contaminated with oil.

  The present invention can be embodied in various ways other than the above-described embodiment. For example, the oil filter mounting bracket can be formed integrally with an engine body such as a front cover. Further, the oil filter mounting portion can adopt various forms such as a form in which an oil receiving portion is provided on the front surface of the block-shaped main body. The oil receiving portion may be arcuate or V-shaped.

  Further, the bottom surface of the oil receiving portion does not need to be inclined as a whole, and a boat-shaped form with an upward opening in which the bottom surface is horizontal and a weir portion is provided at the tip can also be adopted. There may be a plurality of accessory drive belts. In that case, the auxiliary machine drive belt positioned below the oil filter mounting bracket may be in the relationship of the claims.

  The present invention is actually applicable to an internal combustion engine. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Cylinder block which comprises engine main body 2 Cylinder head which comprises engine main body 5 Front cover which comprises engine main body 6 Crankshaft 8 Alternator as an example of auxiliary machine 9 Air conditioner compressor as an example of auxiliary machine 10 Auxiliary drive belt DESCRIPTION OF SYMBOLS 20 Oil filter 21 Oil filter mounting bracket as an example of oil filter mounting part 25 Pump housing part of front cover 27 Flange part 28 Arm part 29 Filter mounting seat 30 Oil receiving part 42 Downward rib as an example of oil return prevention part

Claims (2)

An oil filter mounting portion to which an oil filter can be freely attached and detached is disposed at one end surface of the engine body on the side where the accessory driving belt driven by the crankshaft is arranged. It is provided to be located above a part of the circuit,
The oil filter mounting portion, the a mounting seat of the oil filter overlap, have an oil receiving portion that protrudes to the opposite side to the mounting seat or al the engine body, the oil receiving portion is recessed downward It is formed in a scoop shape and is inclined so that the bottom portion becomes higher toward the tip, so that oil can accumulate in the oil receiving portion, and when the accumulated oil overflows, it spills only from the tip. And
The tip of the oil receiving portion, across the circumferential circuit before Kiho drive belt is located on the opposite side of the engine body, further, the tip of the oil receiving portion, the lower surface of the oil oil receiving portion An oil return prevention part is formed to prevent the oil from flowing to the
Internal combustion engine. While one end portion of the crankshaft projects outward from one end surface of the engine body, an auxiliary machine driving belt for driving at least an alternator is wound around a crank pulley provided at one end portion of the crankshaft,
On one end surface of the engine body, an oil filter mounting portion to which an oil filter can be attached and detached is provided so as to be positioned above a part of a peripheral circuit of the auxiliary machine drive belt as viewed from the crank axis direction. oil filter mounting portion, the mounting seat for the oil filter overlaps the a mounting seat or al the engine body has an oil receiving portion that protrudes to the opposite side, the oil receiving portion is recessed downward scoop The oil is spilled from the tip only ,
The entire oil receiving portion in the oil filter mounting portion is disposed on the opposite side of the engine body across an auxiliary machine drive belt that drives the alternator.
Internal combustion engine.

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