JP6748683B2 - Engine oil supply - Google Patents

Description

The present invention relates to an oil supply device for an engine, and more particularly, to an oil supply device for an engine that can suppress a reduction in the life of an oil filter.

Conventionally, an oil supply passage, an oil pump for sending engine oil to the oil supply passage under pressure, an oil return passage branched from the middle of the oil supply passage, and a pressure regulating valve for letting out the engine oil in the oil supply passage to the oil return passage. Some have an oil filter provided in the middle of the oil supply passage (for example, refer to Patent Document 1).

According to this type of oil supply device, there is an advantage that the pressure of the engine oil can be optimized by the pressure regulating valve while the engine oil is purified by the oil filter.

JP 2005-220830 A (see FIG. 1)

<Problem> The life of the oil filter tends to be shortened.
In Patent Document 1, since the engine oil on the downstream side in the oil supply direction from the oil filter flows out from the middle of the oil supply passage via the pressure regulating valve, the engine oil flowing out from the middle of the oil supply passage also passes through the oil filter. However, the life of the oil filter tends to be shortened.

An object of the present invention is to provide an oil supply device for an engine that can suppress a reduction in the life of the oil filter.

The matters specifying the invention of the present invention are as follows.
As illustrated in FIG. 1, the oil supply passage (27), the oil pump (3) for pumping the engine oil (4a) to the oil supply passage (27), and the oil supply passage (27) are branched from the middle. An oil return passage (28i), a pressure regulating valve (28) for flowing out the engine oil (4a) from the oil supply passage (27) to the oil return passage (28i), and an oil provided in the middle of the oil supply passage (27). Equipped with a filter (23),
As illustrated in FIG. 1, the pressure regulating valve (28) passes the engine oil (4a) on the upstream side of the oil filter (23) in the oil supply direction from the oil supply passage (27) through the oil return passage (31). Equipped with an outflow valve opening (28b) for outflow,

Further, an oil cooler (21) is provided, and an auxiliary equipment mounting base (22) to which the pressure regulating valve (28), the oil filter (23) and the oil cooler (21) are attached ,
The oil cooler (21) is arranged upstream of the pressure regulating valve (28) in the oil pressure feeding direction,
A cooler bypass valve (30) for returning the engine oil (4a) to the oil pan (4) through the oil return passage (28i) is provided, and the opening pressure of the cooler bypass valve (30) is the opening pressure of the pressure regulating valve (28). An oil supply device for an engine, characterized in that it is set higher than the valve pressure, and the cooler bypass valve (30) is also attached to the accessory mounting base (22).

The present invention has the following effects.
<Effect> The life of the oil filter can be extended.
As illustrated in FIG. 1, the engine oil (4a) upstream of the oil filter (23) in the oil supply direction flows out from the middle of the oil supply passage (27) and does not pass through the oil filter (23). The purification load of the oil filter (23) is reduced, and the life of the oil filter (23) can be extended.

<<Effect>> Installation work of the pressure regulating valve etc. to the engine becomes easy.
By attaching the accessory mounting base (22) to the engine, the pressure regulating valve (28), the oil filter (23) and the oil cooler (21) are attached to the engine as a unit, and the pressure regulating valve (28) is attached to the engine. Work becomes easy.
<<Effect>> Cooling efficiency of the engine oil (4a) is high.
Due to the arrangement of the oil cooler (21), not only the engine oil (4a) passing through the oil filter (23) but also the engine oil (4a) flowing out from the middle of the oil supply passage (27) via the pressure regulating valve (28). Since it is also cooled by the oil cooler (21), the cooling efficiency of the engine oil (4a) is high.
<<Effect>> Leakage of engine oil (4a) is suppressed.
The cooler bypass valve (30) prevents engine oil (4a) from leaking from the oil supply passage (27) due to malfunction of the pressure regulating valve (28), clogging of the oil filter (23) or the oil cooler (21), and the like. It

It is a schematic diagram of the oil supply apparatus used with the engine which concerns on embodiment of this invention. It is the side view which looked at the accessory mounting base used with the apparatus of FIG. 1 from the front side. FIG. 3 is a front view of the accessory mounting base of FIG. 2. FIG. 4A is an explanatory view of the accessory mounting base of FIG. 2, in which FIG. 4A is a perspective view in which the back side is viewed from the front side of the engine in a diagonally lower left direction, and FIG. It is a perspective view. It is a principal part longitudinal cross-sectional front view of the engine which concerns on embodiment of this invention. It is a side view of the engine concerning the embodiment of the present invention. It is a top view of the engine of FIG.

1 to 7 are diagrams illustrating an engine including an oil supply device according to an embodiment of the present invention. In this embodiment, a water-cooled common rail in-line 4-cylinder diesel engine will be described.

The outline of this engine is as follows.
As shown in FIGS. 5 to 7, the engine is mounted on a cylinder block (5), a cylinder head (6) mounted on the upper part of the cylinder block (5), and an upper part of the cylinder head (6). As shown in FIG. 6, the cylinder head cover (7), the oil pan (4) assembled to the lower part of the cylinder block (5), and the crankshaft (not shown) are set in the front-rear direction as shown in FIG. ), the belt transmission mechanism (9) arranged in the front part, the flywheel housing (10) arranged in the rear part of the cylinder block (5), and the width direction of the engine orthogonal to the front-rear direction as the lateral direction. As shown in FIG. 7, an intake manifold (11) provided on one lateral side of the cylinder head (6) and an exhaust manifold (12) provided on the other lateral side of the cylinder head (6) are provided.
This engine includes a fuel injection device, a vibration isolation device, a water cooling device, a lubrication device, and an oil cooling device.

The fuel injection device is of a common rail type and includes a fuel supply pump (13), a common rail (14) as shown in FIG. 6, and a fuel injector (15) as shown in FIG. Inject fuel.
The anti-vibration device includes a rotary balancer (not shown) to cancel the secondary vibration of the engine and reduce the vibration of the engine.

The water cooling device is provided in a radiator (not shown), a water inlet chamber (16) provided on the intake side of the cylinder block (5), and a front portion of the water inlet chamber (16) as shown in FIG. In the cylinder block (5), the water pump (17) provided, the water relay chamber (18) provided below the water inlet chamber (16) after the water pump (17), as shown in FIG. A block side water jacket (not shown) provided in the cylinder head (6) and a head side water jacket (not shown) provided in the cylinder head (6).
The water cooling device uses the pump pressure of the water pump (17) to dissipate engine cooling water radiated by a radiator into a water inlet chamber (16), a water pump (17), a water relay chamber (18), a block side water jacket, and a head. Circulate the side water jacket and radiator in this order to cool the engine with water.

The lubrication device includes an oil pump (3) shown in FIG. 1 built in a rear portion of a cylinder block (5), an oil cooler (21) housed in a water relay chamber (18), as shown in FIG. It is equipped with an oil filter (23) attached to an accessory mounting base (22) together with an oil cooler (21), and an oil gallery (24) of FIG. 1 provided in the intake side wall of the cylinder block (5). The engine pressure (4a) in the oil pan (4) is adjusted by the pump pressure of the oil pump (3) to remove the oil pump (3), the oil cooler (21), the oil filter (23), the oil gallery (24), and the crank. Circulate the engine sliding parts such as bearings (not shown) and the oil pan (4) in this order to forcibly lubricate the sliding parts of the engine.

As shown in FIG. 1, the oil cooling device includes an oil jet delivery passage (25) provided parallel to the oil gallery (24) in the intake side wall of the cylinder block (5) and a piston (not shown). Equipped with an oil jet nozzle (25a) provided below the engine and a cooling channel (not shown) provided in the piston, and passes through the oil cooler (21) and the oil filter (23) of the lubricating device in order. 4a) is partly divided into the oil jet delivery passage (25) in the accessory mounting base (22), and jetted from the oil jet nozzle (25a) into the cooling channel (26a), and the piston (26) Oil-cool.

As shown in FIG. 1, an oil supply passage (27), an oil pump (3) for pumping engine oil (4a) to the oil supply passage (27), and an oil branched from the middle of the oil supply passage (27). A return passage (28i), a pressure regulating valve (28) for allowing the engine oil (4a) in the oil supply passage (27) to flow into the oil return passage (28i), and an oil filter provided in the middle of the oil supply passage (27). (23) is provided.
Therefore, in this embodiment, there is an advantage that the supply pressure of the engine oil (4a) can be optimized by the pressure regulating valve (28) while the engine oil (4a) is purified by the oil filter (2).

As shown in FIG. 1, the pressure regulating valve (28) includes a pressure receiving portion (28a) that receives the oil pressure of an oil supply passage (27) downstream of the oil filter (23) in the oil pressure feeding direction, and an oil filter (23). Also has an outflow valve opening (28b) and an outflow valve body (28h) for allowing the engine oil (4a) on the upstream side in the oil pressure feeding direction to flow out from the oil supply passage (27) through the oil return passage (28i), and the pressure receiving portion ( When the pressure received by 28a) increases, the opening degree of the outflow valve body (28h) with respect to the outflow valve opening (28b) increases, and when the pressure decreases, the opening degree decreases.

Therefore, in this embodiment, as shown in FIG. 1, the engine oil (4a) on the upstream side in the oil supply direction from the oil filter (23) flows out from the middle of the oil supply passage (27), and the oil filter (23 ), the burden of purification of the oil filter (23) is reduced, and the life of the oil filter (23) can be extended.

Further, as shown in FIG. 1, when the oil pressure on the downstream side of the oil filter (23) in the oil supply direction increases or decreases, the outflow valve for letting out the engine oil (4a) on the upstream side of the oil filter (23) in the oil supply direction. Since the opening degree of the body (28h) is increased or decreased, it is possible to avoid the fluctuation of the supply pressure of the engine oil (4a) due to the pressure loss due to the clogging of the oil filter (23).

As shown in FIG. 1, the oil return passageway (31) is connected to the outflow valve opening (28b), and the engine oil (4a) flowing out from the outflow valve opening (28b) passes through the oil return passageway (28i) to the oil pan. Return to (4).
An oil gallery (24) and an oil jet delivery passage (25) are connected to the downstream side of the oil supply passage (27) in the oil supply direction.
A circulation path for the engine oil (4a) is formed by the oil supply passage (27), the oil gallery (24), the oil jet delivery passage (25), the oil pan (4) and the like.

The structure of the pressure regulating valve (28) is as follows.
As shown in FIG. 1 or 2, the pressure regulating valve (28) includes a slider chamber (28c), a slider (28d) slidably accommodated in the slider chamber (28c), and a biasing spring (28e). ing.
The slider (28d) includes a pressure receiving portion (28a) and an outflow valve body (28h), and the slider chamber (28c) includes a pressure receiving chamber (28f) facing the pressure receiving portion (28a) and an outflow valve opening (28b). ), the slider (28d) is urged in the valve closing direction of the outflow valve body (28h) by the urging spring (28e), and the slider (28d) and the hydraulic pressure received by the pressure receiving portion (28a) are applied. When the hydraulic pressure increases due to the imbalance of the biasing force of the biasing spring (28e), the opening degree of the outflow valve body (28h) with respect to the outflow valve opening (28b) increases, and when the hydraulic pressure decreases, the opening degree decreases. Is configured to

Therefore, in this embodiment, as shown in FIG. 1 or 2, the adjustment is performed by a simple function using the unbalanced force between the hydraulic pressure received by the pressure receiving portion (28a) and the urging force of the urging spring (28e). The pressure valve (28) can be easily manufactured.

As shown in FIG. 2, the pressure regulating valve (28) is attached to the accessory mounting base (22) to which the oil filter (23) is attached.
Therefore, in this embodiment, by mounting the accessory mounting base (22) to the engine, the pressure regulating valve (28) is also collectively mounted to the engine, and the work of mounting the pressure regulating valve (28) to the engine is facilitated. Become.

As shown in FIG. 3, an oil cooler (21) is attached to the accessory mounting base (22).
Therefore, in this embodiment, by mounting the accessory mounting base (22) on the engine, the oil cooler (21) is also mounted on the engine as a whole, which facilitates the work of mounting the oil cooler (21) on the engine. Become.
That is, this engine is equipped with an oil cooler (21), and is also equipped with a pressure regulating valve (28), an oil filter (23), and an accessory mounting base (22) to which the oil cooler (21) is mounted.
Therefore, in this embodiment, the pressure regulating valve (28), the oil filter (23), and the oil cooler (21) are collectively attached to the engine by attaching the accessory mounting base (22) to the engine, and It becomes easy to install the pressure regulating valve (28).
The oil cooler (21) is arranged upstream of the pressure regulating valve (28) in the oil pressure feeding direction.
Therefore, in this embodiment, not only the engine oil (4a) that passes through the oil filter (23) but also the engine oil (4a) that flows out from the middle of the oil supply passageway (27) via the pressure regulating valve (28). Since it is cooled by the oil cooler (21), the cooling efficiency of the engine oil (4a) is high.

As shown in FIG. 1, the oil supply passage (27) is provided with a relief valve (29) and a cooler bypass valve (30), and the relief valve (29) is connected to the oil inlet (22a) of the accessory mounting base (22). The relief valve (29) and the cooler bypass valve (30) are arranged near the oil inlet (21a) of the oil cooler (21), and the oil outlet (29a) of the relief valve (29) and the cooler bypass valve (30) are arranged. All of the oil outlets (30a) of () are connected to the oil return passage (28i).
The opening pressures of the relief valve (29), the cooler bypass valve (30), and the pressure regulating valve (28) become lower in the order of these descriptions, with the relief valve (29) being the highest and the pressure regulating valve (28) being the lowest.
When the oil passage resistance of the oil cooler (21) increases due to clogging of the internal oil passage of the oil cooler (21), the cooler bypass valve (30) opens, and the engine oil (4a) changes to the oil cooler (21). ) Is returned to the oil pan (4), and when the oil passage resistance of the oil supply passage (27) is further increased due to clogging of the oil filter (23), the relief valve (29) opens. Then, the engine oil (4a) returns from the oil inlet (22a) of the accessory mounting base (22) to the oil pan (4) via the relief valve (29).

That is, as shown in FIGS. 1 to 3, this engine is arranged upstream of the oil cooler (21) in the oil pressure feeding direction, and the engine oil (4a) directed to the oil cooler (21) is fed to the oil return passageway (28i). A cooler bypass valve (30) for returning the oil to the oil pan (4) is provided, and the valve opening pressure of the cooler bypass valve (30) is set higher than the valve opening pressure of the pressure regulating valve (28). 30) is also attached to the accessory mounting base (22).
Therefore, leakage of the engine oil (4a) from the oil supply passage (27) due to malfunction of the pressure regulating valve (28), clogging of the oil filter (23) and the oil cooler (21), etc. is suppressed.

Further, as shown in FIGS. 1 to 3, this engine is arranged upstream of the cooler bypass valve (30) in the oil pressure feeding direction, and the engine oil (4a) directed to the cooler bypass valve (30) is returned to the oil return passage. The relief valve (29) returning to the oil pan (4) via (28i) is provided, and the opening pressure of the relief valve (29) is set higher than the opening pressure of the cooler bypass valve (30). (29) is also attached to the accessory mounting base (22).
Therefore, engine oil (4a) from the oil supply passage (27) due to malfunction of the pressure regulating valve (28), clogging of the oil filter (23) or oil cooler (21), malfunction of the cooler bypass valve (30), etc. Leakage is suppressed.

As shown in FIG. 3 or FIG. 4, the auxiliary machine mounting base (22) is provided with an oil filter mounting seat (22b) on the front side exposed to the outside of the cylinder block (5) and facing the cylinder block (5). An oil cooler mounting seat (22c) is provided on the back side of the cover, and an oil inlet (22a) of the accessory mounting base (22), an oil outlet (29a) of the relief valve (29), and an oil gallery (24). ) And an oil supply port (25a) to the oil jet delivery passage (25) are opened.

That is, as shown in FIG. 5, the block side water jacket provided in the cylinder block and the water relay chamber (18) for relaying the engine cooling water radiated by the radiator to the block side water jacket are provided. The relay chamber (18) is provided in the cylinder block (5), the outer opening of the water relay chamber (18) is covered with the accessory mounting base (22), and is exposed to the outside of the cylinder block (5). An oil filter (23) is attached to the front side of (22), and an oil cooler (21) attached to the back side of the accessory mounting base (22) is housed in the water relay chamber (18).
Therefore, the oil cooler (21) does not project to the outside of the cylinder block (5), and the peripheral parts can be easily arranged.

(3)... Oil pump, (4)... Oil pan, (4a)... Engine oil, (5)... Cylinder block, (21)... Oil cooler, (22)... Auxiliary machine mounting base, (23)... Oil filter , (27)... Oil supply passage, (28)... Pressure regulating valve, (28a)... Pressure receiving part, (28b)... Outflow valve port, (28c)... Slider chamber, (28d)... Slider, (28e)... Energizing Spring, (28f)... Pressure receiving chamber, (28g)... Outflow valve chamber, (28h)... Outflow valve body, (28i)... Oil return passage, (29)... Relief valve, (30)... Cooler bypass valve.

Claims (5)

An oil supply passage (27), an oil pump (3) for pumping engine oil (4a) to the oil supply passage (27), an oil return passage (28i) branched from the middle of the oil supply passage (27), A pressure regulating valve (28) for flowing out engine oil (4a) from the oil supply passage (27) to the oil return passage (28i) and an oil filter (23) provided in the middle of the oil supply passage (27) are provided.
The pressure regulating valve (28) has an outflow valve port (28b) through which the engine oil (4a) upstream of the oil filter (23) in the oil pressure feeding direction flows out from the oil supply passage (27) through the oil return passage (28i). Equipped with
Further, an oil cooler (21) is provided, and an auxiliary equipment mounting base (22) to which the pressure regulating valve (28), the oil filter (23) and the oil cooler (21) are attached ,
The oil cooler (21) is arranged upstream of the pressure regulating valve (28) in the oil pressure feeding direction ,
A cooler bypass valve (30) which is arranged on the upstream side of the oil cooler (21) in the oil pressure feeding direction and returns the engine oil (4a) directed to the oil cooler (21) to the oil pan (4) via the oil return passage (28i). The opening pressure of the cooler bypass valve (30) is set higher than the opening pressure of the pressure regulating valve (28), and the cooler bypass valve (30) is also attached to the accessory mounting base (22). An oil supply device for an engine, which is characterized in that The oil supply device for an engine according to claim 1 ,
A relief valve (which is arranged upstream of the cooler bypass valve (30) in the oil pressure feeding direction and returns the engine oil (4a) toward the cooler bypass valve (30) to the oil pan (4) via the oil return passage (28i). 29), the valve opening pressure of the relief valve (29) is set higher than the valve opening pressure of the cooler bypass valve (30), and the relief valve (29) is also attached to the accessory mounting base (22). An oil supply device for an engine, characterized in that In the oil supply device for an engine according to claim 1 or 2 ,
The pressure regulating valve (28) includes a pressure receiving portion (28a) that receives the oil pressure in the oil supply passage (27) on the downstream side of the oil filter (23) in the oil pressure feeding direction, and an outflow valve body (28h).
When the pressure received by the pressure receiving portion (28a) increases, the opening degree of the outflow valve body (28h) with respect to the outflow valve opening (28b) increases, and when the pressure decreases, the opening degree decreases. An oil supply device for an engine, characterized in that The oil supply device for an engine according to claim 3 ,
The pressure regulating valve (28) includes a slider chamber (28c), a slider (28d) slidably accommodated in the slider chamber (28c), and a biasing spring (28e).
The slider (28d) includes a pressure receiving portion (28a) and an outflow valve body (28h), and the slider chamber (28c) includes a pressure receiving chamber (28f) facing the pressure receiving portion (28a) and an outflow valve opening (28b). ), the slider (28d) is urged in the valve closing direction of the outflow valve body (28h) by the urging spring (28e), and the slider (28d) and the hydraulic pressure received by the pressure receiving portion (28a) are applied. When the hydraulic pressure increases due to the imbalance of the biasing force of the biasing spring (28e), the opening degree of the outflow valve body (28h) with respect to the outflow valve opening (28b) increases, and when the hydraulic pressure decreases, the opening degree decreases. An oil supply device for an engine, which is configured to: In the engine oil supply device according to any one of claims 1 to 4 ,
The cylinder block (5) is provided with a block side water jacket and a water relay chamber (18) for relaying engine cooling water radiated by a radiator to the block side water jacket, and the water relay chamber (18) is It is provided on the cylinder block (5), the outer opening of the water relay chamber (18) is covered with the accessory mounting base (22), and the front side of the accessory mounting base (22) exposed to the outside of the cylinder block (5). An oil supply for an engine, wherein an oil filter (23) is attached, and an oil cooler (21) attached to the back side of the accessory mounting base (22) is housed in the water relay chamber (18). apparatus.

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