JPH07217421A - Oil level detector for engine oil of internal combustion engine - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] There is no fear of impairing the strength of the baffle plate, there is no fear of degrading the performance of the baffle plate, and no separate parts are required, which simplifies the configuration. ,
The cost can be reduced and it is economically advantageous, and
Provided is an oil level detection device for engine oil of an internal combustion engine, which can reduce the weight of a baffle plate. A baffle plate 22 is provided at an upper position in an oil pan, and a recess 24 for directing the tip of the oil level gauge 16 in a predetermined direction is provided at a portion of the baffle plate 22 where the tip of the oil level gauge 16 comes into contact. An opening 26 is provided for inserting the tip of the level gauge into the engine oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting an oil level of engine oil of an internal combustion engine, and more particularly to an engine of an internal combustion engine for detecting an oil level of engine oil in an oil pan by inserting an oil level gauge into the oil pan. The present invention relates to an oil level detection device.

[0002]

2. Description of the Related Art An internal combustion engine includes a cylinder block, a cylinder head mounted on an upper surface of the cylinder block to form a combustion chamber therein, a cylinder head cover mounted on an upper portion of the cylinder head to form a cam chamber therein, and the cylinder. It has a crank lower case mounted on the lower surface of the block and an oil pan mounted on the lower surface of the crank lower case.

Further, for example, an engine oil level detector for detecting the oil level by inserting the tip of the oil level gauge into the engine oil in the oil pan from the top of the cylinder head cover and detecting the oil level by the engine oil adhering to the oil level gauge is provided. .

An example of the oil level detecting device for the engine oil of the internal combustion engine is disclosed in Japanese Utility Model Laid-Open No. 56-145615. In the oil level gauge guide device disclosed in this publication, the oil level gauge guide member is attached and fixed to the oil strainer.

Further, there is one disclosed in Japanese Utility Model Laid-Open No. 56-145616. The guide device for an oil level gauge disclosed in this publication is provided with a cylindrical guide having one end press-fitted into the lower end of an oil level gauge insertion guide hole formed in a cylinder block and the other end extending into an oil pan. ing.

Further, there is one disclosed in Japanese Utility Model Publication No. 56-145617. In the oil level gauge positioning structure for an oil pan disclosed in this publication, a notch for positioning the tip of the oil level gauge is formed in a protrusion provided inside the oil pan.

Furthermore, there is one disclosed in Japanese Utility Model Laid-Open No. 59-2913. The lubricating oil amount measuring device for an internal combustion engine disclosed in this publication has a metal ring that expands and contracts in a radial direction fixed to a part of the outer circumference of a seal member for maintaining airtightness between a guide tube and an oil level rod, and the metal ring is inserted when inserted. Is configured to contact the inner surface of the guide tube.

Further, there is one disclosed in Japanese Utility Model Laid-Open No. 62-45319. In the oil level gauge guide device disclosed in this publication, the gauge guide is integrally formed with the baffle plate in a projection shape at the edge of the gauge insertion hole formed in the baffle plate in the oil pan.

Further, there is one disclosed in Japanese Utility Model Publication No. 64-8514. The engine oil pan baffle plate structure disclosed in this publication penetrates the edge of the through hole of the baffle plate provided in the oil pan in order to avoid interference with the suction pipe corresponding to the suction pipe inclined in this through hole. A concave portion that slopes downward toward the hole is formed, and a rib that extends downward from the edge of the through hole of the concave portion is formed.

Furthermore, there is one disclosed in Japanese Utility Model Publication No. 5-40245. The oil pan structure disclosed in this publication is provided with an oil level gauge guide having a cover guide portion located on the inner protruding line of the oil level gauge inserted from the side surface of the crankcase inside the oil pan. With an arm having a flange that is fixed to the oil pan,
The lower part of the cover guide part is curved perpendicular to the oil surface.

[0011]

In a conventional internal combustion engine, particularly a wet sump type internal combustion engine, as shown in FIG. 9, an oil pan 108 for storing engine oil and an oil level of the engine oil are detected. The oil level gauge 116, the oil level gauge guide 140 that guides the oil level gauge 116 into the oil pan 108, and the lower end of the oil level gauge guide 140
It has an oil pump 144 that holds it via a ring 142.

The oil level gauge 116
Is guided by the oil level gauge guide 140 into the oil pan 108, the baffle plate 122
The engine oil in the oil pan 108 is reached through the through hole 146 formed in.

As a result, the angle and position of the oil level gauge entering the oil surface in the oil pan are limited by the shape and layout of the oil level gauge guide, and the degree of freedom in the layout of the oil level gauge is low.
It is disadvantageous in practical use.

The front engine / front drive (FF) system and the front engine / rear drive (F)
In the case of the same engine using the R) method and different layouts of the oil pan shape, the layouts of the oil level gauge and the oil level gauge guide also need to be dedicated layouts, respectively, and the number of parts is increased, resulting in manufacturing. It is difficult, costly, and economically disadvantageous.

Alternatively, as disclosed in Japanese Utility Model Publication No. 5-40245 mentioned above, the oil level gauge 216 is held by the oil level gauge guide 240 held by the crankcase 214 in the path through which the oil level gauge reaches the oil level. When guiding the oil into the oil pan 208, as shown in FIG. 10, there is an oil pan 208 provided with a cover guide portion 246.

The cover guide portion 246 is provided on the arm 24.
8 The flange 250 formed at the tip of the oil pan 20
8 Oil level gauge 21 fixed to the inner surface and inserted
6 is curved and guided in the direction perpendicular to the oil surface.

As a result, by fixing the cover guide portion in the oil pan, the number of parts is increased, the weight is increased, the manufacture is difficult, the cost is large, and it is economically disadvantageous. There is.

Further, it is necessary to form the baffle plate in a shape that avoids the cover guide portion by providing the cover guide portion inside the oil pan, and the baffle plate has an original function of suppressing the oil level change and preventing the aeration oil from falling. There is an inconvenience that various performances such as functions are deteriorated.

Further, in the one disclosed in Japanese Utility Model Laid-Open No. 62-45319, the gauge guide is curved only two-dimensionally with respect to the traveling direction of the oil level gauge when guiding the oil level gauge. Since it is not possible to guide in a three-dimensional direction, it is difficult to avoid interfering objects, and there is a disadvantage that the degree of freedom of layout is low.

[0020]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention detects the oil level of an engine oil of an internal combustion engine by inserting an oil level gauge to detect the oil level of the engine oil in an oil pan. In the apparatus, a baffle plate is provided at an upper position in the oil pan, and a concave portion for directing the tip of the oil level gauge in a predetermined direction is provided at a portion of the baffle plate where the tip of the oil level gauge comes into contact. It is characterized by having an opening for inserting the tip of the level gauge into the engine oil.

[0021]

According to the invention as described above, when the oil level gauge is inserted, the tip of the oil level gauge is directed in a predetermined direction by the concave portion formed in the baffle plate, and the tip of the oil level gauge is passed through the opening to the engine. It is inserted into oil to detect the oil level of engine oil, and there is no fear of impairing the strength and performance of the baffle plate, the number of parts does not increase, and cost and weight are reduced.

[0022]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 7 show an embodiment of the present invention. In FIG. 2, 2 is an internal combustion engine, 4 is a cylinder head, 6 is a cylinder block, and 8 is an oil pan.

The internal combustion engine 2 includes a cylinder block 6
A cylinder head 4 mounted on the upper surface of the cylinder block 6 to form a combustion chamber (not shown) therein; a cylinder head cover 12 mounted on the upper portion of the cylinder head 4 to form a cam chamber 10 therein; The crank lower case 14 to be mounted and the oil pan 8 mounted to the lower surface of the crank lower case 14 are provided.

In the internal combustion engine 2, for example, the tip of the oil level gauge 16 is inserted into the engine oil in the oil pan 8 from above the cylinder head cover 12, and the oil level is detected by the engine oil adhering to the oil level gauge 16. An oil level detector 18 for oil is provided.

The oil level detecting device 18 has a guide hole 20 that connects the upper part of the cylinder head cover 12 and the inside of the oil pan 8, and the oil level gauge 16 is inserted into the guide hole 20. is there.

A baffle plate 22 is provided at an upper position in the oil pan 8 and the baffle plate 22 is provided.
A recess 24 for directing the tip of the oil level gauge 16 in a predetermined direction is provided at a portion where the tip of the oil level gauge 16 contacts, and an opening 26 for inserting the tip of the oil level gauge 16 into the engine oil is provided in the recess 24. Is provided.

More specifically, the concave portion 24 has a conical shape so that the tip of the oil level gauge 16 is directed toward the oil surface, that is, as shown in FIGS. 1 and 3A to 3C, the baffle plate 22. It is formed in a triangular pyramid shape so as to be formed outward from a predetermined portion and gradually descend toward the oil surface in the lower oil pan 8.

At this time, the predetermined portion of the baffle plate 22 is a range A in which the oil level gauge 16 can contact the baffle plate 22, as shown in FIGS. 4 and 5.
That is, it is a position where the deformation range of the oil level gauge 16 can be held.

The opening 26 is formed at a position where the tip of the oil level gauge 16 comes into contact with the recess 24 of the baffle plate 22, that is, at a position eccentric to the deformation range of the oil level gauge 16.

In practice, as shown in FIGS. 4 and 5, the opening 26 is formed in a triangular shape at the deepest portion of the triangular pyramidal recess 24 formed in the baffle plate 22.

Next, the operation will be described.

When the oil level gauge 16 is inserted from above the cylinder head cover 12 when the oil level of the engine oil in the oil pan 8 is detected, the oil level gauge 1
The tip end of 6 reaches the baffle plate 22 through the cylinder head 4, the cylinder block 6, and the crank lower case 14.

At this time, the tip of the oil level gauge 16 comes into contact with the concave portion 24, and as shown in FIG. 1, the inclination of the concave portion 24 formed in the shape of a triangular pyramid causes a path which is a locus of the tip of the oil level gauge 16. Is changed and moves toward the opening 26 side along the inclination.

The tip of the oil level gauge 16 which has reached the opening 26 is, as shown in FIGS. 1 and 2, the opening 26.
And is inserted substantially vertically into the engine oil in the oil pan 8.

Then, the oil level gauge 16 is pulled out, and the oil level is detected by the engine oil attached to the tip of the oil level gauge 16.

As a result, even if the recess 24 and the opening 26 are formed, there is no fear that the strength of the baffle plate 22 will be impaired, there will be no fear that the performance of the baffle plate 22 will be degraded, and a separate component will be provided. It is unnecessary, the structure can be simplified, the cost can be reduced, and it is economically advantageous, and the weight of the baffle plate can be reduced.

Further, the oil level gauge 16 is formed by forming the concave portion 24 into a pyramidal shape, that is, a triangular pyramid shape.
The tip of the baffle plate can be smoothly guided, the tip of the oil level gauge can be reliably guided to the engine oil in the oil pan, which is practically advantageous, and the strength of the baffle plate can be firmly maintained.

Further, since the opening 26 is formed at a position where the tip of the oil level gauge 16 comes into contact with the recess 24 of the baffle plate 22, that is, a position eccentric with respect to the deformation range of the oil level gauge 16, It is possible to guide the trajectory of the level gauge 16 in a three-dimensional direction, the direction and angle of the tip of the oil level gauge 16 can be changed, and the degree of freedom in layout is high, and
It is possible to reliably avoid interference with other objects, which is practically advantageous.

Furthermore, since the opening 26 is formed at the deepest part of the triangular pyramidal recess 24 formed in the baffle plate 22, the tip of the oil level gauge 16 can reach the opening 26 smoothly. As a result, the work of inserting the oil level gauge 16 becomes easy and the usability can be improved.

Further, when forming the concave portion 24, if the size and the inclination angle of the cone shape formed on the baffle plate 22 are changed, the direction of the oil level gauge can be arbitrarily set, which is practical. It is advantageous.

Furthermore, the front engine / front drive (FF) system and the front engine / rear drive (F)
In the same engine 2 adopting the (R) system, the oil level gauge 16 and other parts can be shared as shown in FIGS. 6 and 7 even when the layout of the oil pan 8 is different. It is possible to suppress the increase in the cost and to realize it at low cost.

The present invention is not limited to the above-mentioned embodiment, and various application modifications are possible.

For example, in the embodiment of the present invention, the opening 26 is formed at the deepest portion of the recess 24, but as shown in FIG. 8, the oil level gauge 16 is in the middle of the route, that is, the recess 40 is inclined. A hole 44 is bored in the middle of the surface portion 42, and the hole 44 is made to function as an opening so that the directionality of the tip of the oil level gauge 16 can be easily changed, and a highly versatile baffle plate 22 is realized. In addition, the baffle plate 22 is not significantly deteriorated in strength and performance by coping with only the formation of the hole 44.

In the embodiment of the present invention, when the oil level of the engine oil in the oil pan is detected, the oil level gauge is inserted from the upper portion of the cylinder head cover. However, the oil level gauge is inserted from the side surface of the engine. It can also be applied to the structure having

[0046]

As described above in detail, according to the present invention, the baffle plate is provided at the upper position in the oil pan, and the tip of the oil level gauge is directed in a predetermined direction at the portion where the tip of the oil level gauge of the baffle plate contacts. In addition to providing a recess to allow the tip of the oil level gauge to be inserted into the engine oil, there is no risk of impairing the strength of the baffle plate and the risk of degrading the performance of the baffle plate. In addition, no separate parts are required, the structure can be simplified, the cost can be reduced, it is economically advantageous, and the weight of the baffle plate can be reduced.

Further, if the recess is formed in a conical shape so that the tip of the oil level gauge is directed toward the oil surface, the tip of the oil level gauge is smoothly guided, and the tip of the oil level gauge is engine oil in the oil pan. The baffle plate can be surely guided to the baffle plate and is practically advantageous, and the strength of the baffle plate can be firmly maintained.

Further, if the opening is formed at a position eccentric with respect to the portion where the tip of the oil level gauge comes into contact with the concave portion of the baffle plate, the opening is guided in a three-dimensional direction with respect to the locus of the oil level gauge. In addition, the direction and angle of the tip of the oil level gauge can be changed, the degree of freedom in layout is high, and interference with other objects can be reliably avoided, which is practically advantageous.

Furthermore, if the opening is formed at the deepest part of the conical recess formed in the baffle plate,
The tip of the oil level gauge can reach the opening smoothly, the insertion work of the oil level gauge becomes easy, and the usability can be improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a locus of a tip of an oil level gauge showing an embodiment of the present invention.

FIG. 2 is a sectional view of an internal combustion engine.

FIG. 3 shows an oil pan, where (a) is a plan view of the oil pan, (b) is a vertical sectional view of (a), and (c) is 〓c of (a).
FIG. 6 is a cross-sectional view taken along line c.

FIG. 4 is a schematic enlarged cross-sectional view showing a range in which an oil level gauge can contact a baffle plate.

FIG. 5 is a schematic plan view showing a range in which an oil level gauge can contact a baffle plate.

[Figure 6] Front engine / front drive (FF)
It is the schematic of the engine which employ | adopts a system.

FIG. 7 is a schematic diagram of an engine adopting a front engine / rear drive (FR) system.

FIG. 8 is a schematic enlarged cross-sectional view of a recess and an opening showing another embodiment of the present invention.

FIG. 9 is a schematic view of an oil pan into which an oil level gauge showing a first conventional technique of the present invention is inserted.

FIG. 10 is a schematic view of an oil pan having an oil level gauge inserted therein, showing a second prior art of the present invention.

[Explanation of symbols]

 2 Internal Combustion Engine 4 Cylinder Head 6 Cylinder Block 8 Oil Pan 10 Cam Chamber 12 Cylinder Head Cover 14 Crank Lower Case 16 Oil Level Gauge 18 Oil Level Detector 20 Guide Hole 22 Baffle Plate 24 Recess 26 26 Opening

[Procedure amendment]

[Submission date] April 5, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 3]

[Figure 8]

[Figure 9]

[Figure 10]

Claims (4)

[Claims] 1. An oil level detecting device for an engine oil of an internal combustion engine, wherein an oil level gauge is inserted to detect an oil level of engine oil in an oil pan, and a baffle plate is provided at an upper position in the oil pan. A concave portion for directing the oil level gauge tip in a predetermined direction is provided at a portion of the plate where the oil level gauge tip comes into contact, and an opening portion for inserting the oil level gauge tip into the engine oil is provided in this concave portion. An oil level detector for engine oil of an internal combustion engine. 2. The oil level detection device for engine oil of an internal combustion engine according to claim 1, wherein the recess is a recess formed in a cone shape so that the tip of the oil level gauge is directed toward the oil level. 3. The internal combustion engine according to claim 1, wherein the opening is an opening formed at a position eccentric to a portion where the tip of the oil level gauge comes into contact with the recess of the baffle plate. Engine oil level detection device. 4. The internal combustion engine according to claim 1, wherein the opening is an opening formed in a deepest part of a conical recess formed in the baffle plate. Engine oil level detector.