JPS6118167Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cylinder block mechanism for a V-row engine, and its objectives are (1) shortening the overall length of the engine by shortening the distance between the radiator fan and the end face of the cylinder block; These include simplifying the crankshaft support structure for driving the fan, and (3) making the arrangement of auxiliary equipment such as cold water pumps and lubricating oil pumps more compact. First, the present invention will be explained based on the drawings.

Fig. 1 is a partial plan view of a cylinder block for a V-row engine according to the present invention, and Fig. 2 is a view taken in the direction of the arrows in Fig. 1.
The cylinders (cylinder rows) 2 and 3 are arranged in a V-shape (Fig. 2) above both sides of the crankshaft center O, and the cylinders 2 and 3 facing each other across the crankshaft center O are as follows: They are arranged with a phase difference D (FIG. 1) in the length direction of the crankshaft. In the block wall portion between the radiator fan side end surface 5 of the cylinder block 1 and the cylinder 2 on the side located far from the end surface 5 (the left side in FIGS. 1 and 2), there is a crank. A lubricating oil passage 6 is formed perpendicular to the shaft center O. Further, a lubricating oil main pipe 7 parallel to the crankshaft center O is fitted into the block wall portion between both cylinders 2 and 3, and the lubricating oil main pipe 7 communicates with one end of the lubricating oil passage 6. The other end of the lubricating oil passage 6 opens outward from the end face 4 of the block on the first cylinder 2 side, and communicates with a lubricating oil cooler 8, as will be described in detail in the description of FIG. 3 and the like. The lubricating oil main pipe 7 also communicates with various parts to be lubricated, such as the crank bearing.

Fig. 3 is a side view of the entire engine using the cylinder block as described above, and Fig. 4 is a view taken in the direction of the arrows in Fig. 3. In these Figs. 3 and 4, 11 is the oil pan, 12 is the cylinder. The head 13 is a gear case, and the gear case 13 is fixed to the end face 5 of the block 1 on the radiator fan 32 side.
A gear case lid 15 is fixed to the gear case 13. A lubricating oil pump 1 is installed on the gear case lid 15.
6. Cooling water pump 17 and radiator drive device 1
8 is fixed. 19 is a pressure regulating valve.

A fuel injection pump 20 is disposed approximately in the center of the side surface of the block 1 (the surface in FIG. 3), and a lubricating oil strainer 21 is disposed below the fuel injection pump 20 and near the radiator fan. Further, the lubricating oil cooler 8 is arranged on the radiator fan side of the fuel injection pump 20. The inlet of the lubricating oil pump 16 is connected to the oil pan 11 via an oil pipe 22.
The outlet of the lubricating oil pump 16 is connected to the oil pipe 2.
3 (FIG. 4) to a pressure regulating valve 19, and the pressure regulating valve 19 is connected to a lubricating oil strainer 21 via an oil pipe 24. The oil pipe 24 is the strainer inlet part 2
1a, and the strainer outlet 21b is connected to the inlet of a lubricating oil cooler 8 via an inverted T-shaped oil pipe 25, and the outlet of the lubricating oil cooler 8 is connected to the lubricating oil passage 6 of the block 1. directly, ie without external piping. 26 is a surplus oil return pipe.

In FIG. 5, which is an enlarged partial cross-sectional view of FIG. The shaft 30 passes through a hole in an annular body 15a fixed to the gear case lid 15 and connects to the radiator fan 3.
Although it protrudes toward the second side, only a seal 33 is disposed between the hole of the annular body 15a and the outer peripheral surface of the crankshaft, and no bearing is disposed. crankshaft 3
There is a V pulley 35 on the protruding part on the radiator fan side of 0.
This V-pulley 35 is interlocked and connected to a V-pulley 36 of the radiator drive device 18 via a V-belt 37. 38 is lubricating oil main pipe 7
It is the lid of

To briefly explain the flow of lubricating oil, the oil pan 11 is pumped by the lubricating oil pump 16 (Fig. 3).
The lubricating oil sucked out from inside is pressure regulated by a pressure regulating valve 19, and then filtered by a strainer 21.
The lubricating oil is sent to the lubricating oil cooler 8 and cooled. The cooled lubricating oil is supplied from the lubricating oil cooler 8 to the lubricating oil passage 6 in the block 1, and is supplied to each lubricated location via the lubricating oil main pipe 7.

In the conventional engine, the lubricating oil cooler 8 and the lubricating oil main pipe 7 are connected by external piping using a pipe or the like, which causes the following problems.

(1) In order to secure space for external piping, it is necessary to increase the length of the entire radiator drive device 18 in the crankshaft length direction, and accordingly, the radiator fan side end surface 5 of the block 1 and the radiator fan Distance L from 32 (see Figure 5)
becomes longer, and the overall length of the engine also becomes longer.

(2) When the above distance L becomes longer, the protruding length l of the crankshaft 30 on the radiator fan side must also be increased, and therefore a bearing for supporting the crankshaft is required in the gear case lid 15 portion (annular body 15a portion). Become.

(3) Cooling water pump 17 by external piping
The layout pattern of the lubricating oil pump 16 on the gear case cover 15 is restricted, and as a result, the fuel injection pump 20 cannot be placed in the center of the side of the block, which increases the length of the high-pressure fuel pipe and causes deterioration of engine performance. Become.

(4) By providing external piping, the size of the avoidance mass 31 (FIG. 5) is limited, and therefore it is necessary to equip a damper and rubber joints, which increases the cost.

In contrast, in the present invention, the cylinders are arranged in a V-shape on both sides of the crankshaft, and the cylinders facing each other across the crankshaft are arranged with a phase difference in the length direction of the crankshaft. A lubricating oil passage that is approximately perpendicular to the crankshaft is formed in the block wall between the radiator fan side end face and the cylinder located far from this end face, and one end of the lubricating oil passage is connected to the crankshaft. It communicates almost perpendicularly with the lubricating oil main pipe provided in the center of the cylinder block parallel to the top, and lubricating oil is supplied to the lubricated area through this lubricating oil main pipe.
It has the following advantages:

(1) In the connection between the lubricating oil cooler 8 and the lubricating oil main pipe 7, there is no need to install external piping that passes through the radiator drive device 18 part, so it is possible to connect the radiator fan 32 from the end face 5 of the block 1 on the radiator fan side. The distance L (Fig. 5) can be shortened, and the overall length of the engine can be shortened.

(2) By shortening the distance L, the protruding length l of the crankshaft 30 on the radiator fan side can be shortened, and an external bearing for the crankshaft 30 becomes unnecessary. That is, there is no need to provide a crankshaft supporting bearing on the gear case lid 15 (annular body 15a), and the crankshaft supporting structure becomes simpler.

(3) The cooling water pump 17 and lubricating oil pump 16 are
As shown in the figure, it can be easily arranged compactly and centrally on the gear case lid 15.
Therefore, the fuel injection pump 20 (FIG. 3) can also be easily placed in the center of the side surface of the cylinder block 1. Therefore, the high pressure fuel pipe can be shortened, improving engine performance.

(4) Since restrictions on the size of the avoidance mass 31 are significantly relaxed, there is no need to equip dampers or rubber joints, which reduces costs.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view of the cylinder block according to the present invention, Fig. 2 is a view taken in the direction of the arrows in Fig. 1, Fig. 3 is a combined side view of a V-row engine equipped with the cylinder block according to the present invention, and Fig. 4 is a FIG. 3 is a view taken in the direction of the arrows, and FIG. 5 is an enlarged cross-sectional view of FIG. 4. 1... Cylinder block, 2, 3... Cylinder, 5... End face, 6... Lubricating oil passage.

Claims (1)

[Scope of utility model registration request] The cylinders are arranged in a V-shape on both sides of the crankshaft, and the cylinders facing each other across the crankshaft are arranged with a phase difference in the length direction of the crankshaft. A lubricating oil passage that is approximately perpendicular to the crankshaft is formed in the block wall portion between the cylinder located far from the end face, and one end of the lubricating oil passage is placed in the center of the cylinder block parallel to the upper part of the crankshaft. A cylinder block structure for a V-row engine, characterized in that it communicates approximately at right angles with a lubricating oil main pipe provided, and lubricating oil is supplied to a lubricated location via the lubricating oil main pipe.