JP2019011802A - Vibration controller of engine - Google Patents

Abstract

To provide a vibration controller of an engine capable of suppressing increase of an oil temperature of engine oil 4a.SOLUTION: A vibration controller of an engine comprises a rotation balancer 1 arranged in the engine, and a balancer cover 2. The balancer cover 2 covers a side opposite to a bias direction of a balancer weight 1b to a rotation center 1a of the rotation balancer 1, and is formed in a circular arc shape along a circular-arc rotation locus 1d of an outer peripheral surface 1c of the balancer weight 1b. The rotation balancer 1 comprises a rib 1e projecting from the balancer weight 1b to a side where the balancer cover 2 is provided, and a corner space 1f held between the rib 1e and the balancer weight 1b is covered with the balancer cover 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an engine vibration isolator, and more particularly to an engine vibration isolator capable of suppressing an increase in oil temperature of engine oil.

  Conventionally, there is an anti-vibration device for an engine including a rotary balancer disposed inside the engine (see, for example, Patent Document 1).

  According to this type of device, there is an advantage that the vibration of the engine can be reduced by reducing the vibration by the rotary balancer.

JP 2003-184527 A (see FIGS. 1 and 2)

<< Problem >> Engine oil temperature is likely to rise.
In the thing of patent document 1, the jumping of the engine oil by a balancer weight is accelerated | stimulated and the oil temperature of engine oil rises easily.

  The subject of this invention is providing the vibration isolator of an engine which can suppress the raise of the oil temperature of engine oil.

The invention specific matters of the present invention are as follows.
As illustrated in FIG. 1, the rotary balancer (1) and the balancer cover (2) disposed inside the engine are provided.
The balancer cover (2) covers the opposite side of the balancer weight (1b) with respect to the rotation center (1a) of the rotation balancer (1), and the rotation locus of the arc of the outer peripheral surface (1c) of the balancer weight (1b) ( An anti-vibration device for an engine, which is formed in an arc shape along 1d).

The present invention has the following effects.
<Effect> An increase in the oil temperature of the engine oil is suppressed.
Even if a part of the rotary balancer (1) is immersed in the engine oil (4a), or even if the engine oil (4a) falls on the rotary balancer (1), the engine oil (4a) is removed by the balancer cover (2). The engine oil (4a) is prevented from jumping up by the balancer weight (1b) and the oil temperature of the engine oil (4a) is suppressed from rising.

<Effect> A decrease in hydraulic pressure in the circulation path of engine oil is suppressed.
The splashing of the engine oil (4a) by the balancer weight (1b) is suppressed, the generation of bubbles in the engine oil (4a) is suppressed, and the decrease in hydraulic pressure in the engine oil circulation path is suppressed.

<Effect> Excessive generation of oil mist is suppressed.
The engine oil (4a) is prevented from jumping up by the balancer weight (1b), and excessive generation of oil mist is suppressed.

It is a principal part longitudinal section front view of the vibration isolator of the engine which concerns on embodiment of this invention. 1 is a longitudinal front view of an engine according to an embodiment of the present invention. It is a vertical side view of the engine of FIG. It is a front view of the engine of FIG. It is a side view of the engine of FIG. It is a top view of the engine of FIG.

  FIGS. 1-6 is a figure explaining the engine provided with the vibration isolator which concerns on embodiment of this invention, and this embodiment demonstrates a water-cooled common rail type | formula four-cylinder diesel engine.

The outline of this engine is as follows.
As shown in FIG. 2, this engine includes a cylinder block (5), a cylinder head (6) assembled to the upper part of the cylinder block (5), and a cylinder head cover (6) assembled to the upper part of the cylinder head (6). 7), the oil pan (4) assembled to the lower part of the cylinder block (5), and the direction of installation of the crankshaft (8) as the front-rear direction, as shown in FIG. 3, the front part of the cylinder block (5) As shown in FIG. 2, the belt transmission mechanism (9) arranged in the cylinder block, 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 are taken as the lateral direction. In addition, an intake manifold (11) provided on one side of the cylinder head (6) and an exhaust manifold (12) provided on the other 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. 5, and a fuel injector (15) as shown in FIG. Inject fuel.
As shown in FIG. 2, the vibration isolator includes a rotation balancer (1), cancels out secondary vibrations of the engine, and reduces engine vibrations.

The water cooling device includes a radiator (not shown), a water inlet chamber (16) provided on the intake side of the cylinder block (5) as shown in FIG. 2, and a water inlet chamber (16) as shown in FIG. 16) and a water relay chamber (18) provided at the lower part of the water inlet chamber (16) after the water pump (17), as shown in FIG. A block side water jacket (19) provided in the cylinder block (5) and a head side water jacket (20) provided in the cylinder head (6) are provided.
The water cooling device uses the pump pressure of the water pump (17) to dissipate engine cooling water radiated by the radiator into the water inlet chamber (16), the water pump (17), the water relay chamber (18), the block side water jacket (19 ), The head side water jacket (20), and the radiator are circulated in this order to cool the engine with water.

  The lubricating device includes an oil pump (not shown) built in the rear part of the cylinder block (5), an oil cooler (21) housed in the water relay chamber (18), as shown in FIG. An oil filter (23) attached to the base (22) together with an oil cooler (21), and an oil gallery (24) provided in a wall on the intake side of the cylinder block (5) are provided. Then, the engine oil (4a) in the oil pan (4) is supplied to an oil pump, an oil cooler (21), an oil filter (23), an oil gallery (24), and a bearing (8a) of the crankshaft (8) shown in FIG. ) And the oil pan (4) are circulated in this order to forcibly lubricate the engine sliding portion.

  As shown in FIG. 2, the oil cooling device includes an oil jet delivery passage (25) provided in parallel with the oil gallery (24) in the wall on the intake side of the cylinder block (5), and a piston (26). Engine oil which has an oil jet nozzle (25a) provided below and a cooling channel (26a) provided in the piston (26), which has passed through the oil cooler (21) and the oil filter (23) of the lubrication device in order. A part of (4a) is diverted into the oil jet delivery passage (25) in the auxiliary equipment mounting base (22), and injected from the oil jet nozzle (25a) into the cooling channel (26a), and the piston (26 ) Oil-cooled.

As shown in FIG. 1, the vibration isolator includes a rotary balancer (1) and a balancer cover (2) disposed inside the engine.
The balancer cover (2) covers the opposite side of the balancer weight (1b) with respect to the rotation center (1a) of the rotation balancer (1), and the rotation locus of the arc of the outer peripheral surface (1c) of the balancer weight (1b) ( It is formed in an arc shape along 1d).

For this reason, in this embodiment, even when a part of the rotary balancer (1) is immersed in the engine oil (4a), or even when the engine oil (4a) falls on the rotary balancer (1), the balancer cover (2 ), The engine oil (4a) is received, the engine oil (4a) is prevented from jumping up by the balancer weight (1b), and the oil temperature of the engine oil (4a) is suppressed from rising.
Further, the splashing of the engine oil (4a) by the balancer weight (1b) is suppressed, the generation of bubbles in the engine oil (4a) is suppressed, and the decrease in hydraulic pressure in the engine oil circulation path is suppressed.
Furthermore, the engine oil (4a) is prevented from jumping up by the balancer weight (1b), and excessive generation of oil mist is suppressed.

  As shown in FIG. 1, the rotary balancer (1) includes a rib (1e) protruding from the balancer weight (1b) on the side where the balancer cover (2) is provided, and the rib (1e) and the balancer weight (1b). A corner space (1f) sandwiched between the two is covered with a balancer cover (2).

For this reason, in this embodiment, the rigidity of the rotating balancer (1) is high due to the reinforcement of the rib (1e).
In addition, the engine oil (4a) is prevented from jumping up by the rib (1e), and phenomena such as a decrease in engine consumption and deterioration of the engine oil (4a) due to suppression of the engine oil (4a) jumping up are apparent. Turn into.

As shown in FIG. 1, the balancer cover (2) is attached to the rotary balancer (1) by bonding arcuate curved end surfaces to the balancer weight (1b) and the rib (1e).
Both ends of the corner space (1f) in the balancer cover (2) are opened, and the engine oil (4a) in the corner space (1f) flows out from the openings at both ends.

  As shown in FIG. 1, the vibration isolator includes a balancer holder (3), and a rotary balancer (1) to which a balancer cover (2) is attached is supported by the balancer holder (3), and the balancer holder (3) is attached. A rotary balancer (1) is attached inside the engine.

  For this reason, in this embodiment, the rotation balancer (1) is attached to the inside of the engine via the balancer holder (3), and the attachment of the rotation balancer (1) to the inside of the engine becomes easy.

As shown in FIG. 1, in the vibration isolator, a plurality of rotary balancers (1) are supported by a balancer holder (3).
For this reason, in this embodiment, a plurality of rotation balancers (1) are attached to the engine via the balancer holder (3), and attachment of the rotation balancer (1) to the engine is facilitated.
Two rotation balancers (1) are provided. The upper surface of the balancer holder (3) is opened.

  As shown in FIG. 3, the rotary balancer (1) is driven by the crankshaft (8) via the balancer-linked gear train (1g). The balancer-linked gear train (1g) includes a balancer drive gear (1h) attached to the crankshaft (8) and a balancer input gear (1i) attached to the rotary balancer (1), and the balancer input gear (1i). Is supported by a balancer holder (3) via a rotary balancer (1).

  As shown in FIG. 1, the rotary balancer (1) is disposed inside the oil pan (4). As described above, the engine can be kept compact by disposing the rotary balancer (1) inside the oil pan (4) where it is easy to obtain a space margin.

As shown in FIG. 1, the balancer holder (3) is attached to the lower surface of the cylinder block (5) inside the oil pan (4). The bottom wall of the balancer holder (3) is a baffle plate (3a).
For this reason, in this embodiment, the phenomenon that the rippling engine oil (4a) is blocked by the baffle plate (3a) and the balancer cover (2) and the rotary balancer (1) are all immersed in the engine oil (4a). It is difficult to occur and the accompanying horsepower loss is suppressed.

  (1) ... rotation balancer, (1a) ... center of rotation, (1b) ... balancer weight, (1c) ... outer peripheral surface, (1d) ... rotation locus, (1e) ... rib, (1f) ... corner space, ( 2) ... balancer cover, (3) ... balancer holder, (3a) ... baffle plate, (4) ... oil pan.

Claims (5)

A rotating balancer (1) and a balancer cover (2) arranged inside the engine.
The balancer cover (2) covers the opposite side of the balancer weight (1b) with respect to the rotation center (1a) of the rotation balancer (1), and the rotation locus of the arc of the outer peripheral surface (1c) of the balancer weight (1b) ( An anti-vibration device for an engine, which is formed in an arc shape along 1d). The vibration isolator for an engine according to claim 1,
The rotary balancer (1) includes a rib (1e) protruding from the balancer weight (1b) on the side where the balancer cover (2) is provided, and a corner space sandwiched between the rib (1e) and the balancer weight (1b). An anti-vibration device for an engine, characterized in that (1f) is covered with a balancer cover (2). The vibration isolator for an engine according to claim 1 or 2,
With balancer holder (3),
The rotary balancer (1) to which the balancer cover (2) is attached is supported by the balancer holder (3), and the rotary balancer (1) is attached to the inside of the engine via the balancer holder (3). Anti-vibration device for the engine. The vibration isolator for an engine according to claim 3,
A vibration isolator for an engine, wherein a plurality of rotary balancers (1) are supported by a balancer holder (3). The vibration isolator for an engine according to any one of claims 1 to 4,
An anti-vibration device for an engine, characterized in that the rotary balancer (1) is disposed inside the oil pan (4).

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