JP6407770B2 - engine - Google Patents

Description

  The present invention relates to an engine, and more particularly to an engine capable of suppressing a problem that a blow-by gas inlet and a blow-by gas outlet of an oil separator are blocked during cold weather.

  Conventionally, a breather chamber, a breather chamber outlet pipe, an oil separator, an oil separator outlet pipe, and an intake path are provided, the breather chamber is connected to the blow-by gas inlet of the oil separator via the breather chamber outlet pipe, and the blow-by gas outlet of the oil separator is There is an engine connected to an intake path via an oil separator outlet pipe (see, for example, Patent Document 1).

  According to this type of engine, the oil in the blow-by gas that has not been separated in the breather chamber is separated by the oil separator, and there is an advantage that air pollution and oil consumption can be suppressed.

  However, in the thing of patent document 1, the blow-by gas inlet and blow-by gas outlet of an oil separator are arrange | positioned in the position facing an engine cooling fan, and the exit of the breather outlet pipe connected to the blow-by gas inlet and blow-by gas outlet of an oil separator There is a problem because the engine cooling wind directly hits the part and the inlet part of the oil separator outlet pipe.

JP 2014-109241 A (see FIGS. 1 to 4)

<< Problem >> There is a possibility that the blow-by gas inlet and the blow-by gas outlet of the oil separator are clogged at the time of cold.
In Patent Document 1, when the engine is started in cold weather, the outlet portion of the breather outlet pipe and the inlet portion of the oil separator outlet pipe are supercooled by the engine cooling air, the condensed water in the blow-by gas is frozen, and the oil separator The blow-by gas inlet and the blow-by gas outlet may be blocked.

  The subject of this invention is providing the engine which can suppress the malfunction which the blowby gas inlet_port | entrance and blowby gas exit of an oil separator block | close at the time of cold.

  As a result of research, the inventor of the present invention has arranged the blow-by gas inlet and blow-by gas outlet of the oil separator on the rear side of the oil separator with the air blowing direction of the engine cooling fan facing backward, It was found that the outlet portion of the breather outlet pipe and the inlet portion of the oil separator outlet pipe are not easily cooled by the engine cooling air, and the problem that the blow-by gas inlet and the blow-by gas outlet of the oil separator are blocked can be suppressed. It came.

(Invention-specific matters common to the inventions of claims 1 and 5)
As illustrated in FIGS. 1 to 4, a breather chamber (1), a breather chamber outlet pipe (2), an oil separator (3), an oil separator outlet pipe (4), and an intake passage (5) are provided. 1) is connected to the blow-by gas inlet (3a) of the oil separator (3) via the breather chamber outlet pipe (2), and the blow-by gas outlet (3b) of the oil separator (3) is connected to the oil separator outlet pipe (4). In the engine connected to the intake path (5) through
As illustrated in FIGS. 1 to 3, the oil separator (3) is provided with an engine cooling fan (6), and the air blowing direction of the engine cooling air (6 a) blown by the engine cooling fan (6) is the rearward direction. A blow-by gas inlet (3a) and a blow-by gas outlet (3b) are arranged on the rear side of the oil separator (3) .
(Invention-specific matters specific to the invention of claim 1)
As shown in FIGS. 1 to 3, a DPF housing case (7) is provided, and an outlet portion (2a) of a breather chamber outlet pipe (2) and an oil separator outlet pipe (4) are provided below the DPF case (7). An engine, characterized in that an inlet part (4a) of the engine is arranged.
(Invention-specific matters specific to the invention of claim 5)
As shown in FIGS. 1 to 4, a stay (8) is provided, an oil separator (3) is attached to the engine body (9) via the stay (8), and the oil separator (3) is attached to the stay (8). Placed on the back side of
As shown in FIGS. 1 and 2, an engine including an exhaust manifold (10) and a stay (8) attached to the exhaust manifold (10).

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect 1-1 > It is possible to prevent the blow-by gas inlet and the blow-by gas outlet of the oil separator from being blocked during cold weather.
As illustrated in FIGS. 1 to 3, the oil separator (3) is provided with an engine cooling fan (6), and the air blowing direction of the engine cooling air (6 a) blown by the engine cooling fan (6) is the rear direction. Since the blow-by gas inlet (3a) and the blow-by gas outlet (3b) are arranged on the rear side of the oil separator (3), even if the engine is started in cold weather, the outlet portion (2a) of the breather chamber outlet pipe (2) ) And the oil separator outlet pipe (4) at the inlet portion (4a), the engine cooling air (6a) is difficult to blow, and the condensed water in the blow-by gas is difficult to freeze. For this reason, it can suppress that the blow-by gas inlet (3a) and blow-by gas outlet (3b) of an oil separator (3) block | close at the time of cold.

<< Effect 1-2 >> The blockage suppression function of the blow-by gas inlet and the blow-by gas outlet of the oil separator is enhanced.
As shown in FIGS. 1 to 3, a DPF housing case (7) is provided, and an outlet portion (2a) of the breather chamber outlet pipe (2) and an oil separator outlet pipe (4) are provided below the DPF housing case (7). ) Is disposed, the outlet part (2a) and the inlet part (4a) receive heat radiation from the exhaust from the DPF housing case (7), and the blow-by gas inlet of the oil separator (3) (3a) and the blockage suppression function of the blow-by gas outlet (3b) are enhanced.

(Invention of Claim 2 )
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1 .
<Effect 2 > The blockage suppressing function of the blow-by gas inlet and the blow-by gas outlet of the oil separator is enhanced.
As illustrated in FIGS. 1 and 2, the outlet portion (2 a) of the breather chamber outlet pipe (2) and the inlet portion (4 a) of the oil separator outlet pipe (4) are rearwardly below the DPF housing case (7). , The heat receiving distance between the outlet part (2a) and the inlet part (4a) that receive the heat radiation of the exhaust from the DPF housing case (7) becomes longer, and the blow-by gas inlet (3a) of the oil separator (3) becomes longer. ) And the blockage suppression function of the blow-by gas outlet (3b) are enhanced.

(Invention of Claim 3 )
The invention according to claim 3 has the following effect in addition to the effect of the invention according to claim 1 or claim 2 .
<< Effect 3 >> It is possible to prevent the oil separator from being blocked during cold weather.
As shown in FIGS. 1 to 4, a stay (8) is provided, an oil separator (3) is attached to the engine body (9) via the stay (8), and the oil separator (3) is attached to the stay (8). Since the engine cooling air (6a) is difficult to blow to the oil separator (3) even if the engine is started in cold weather, the condensed water in the oil separator (3) is difficult to freeze. For this reason, it can suppress that the inside of an oil separator (3) obstruct | occludes at the time of cold.

(Invention of Claim 4 )
The invention according to claim 4 has the following effect in addition to the effect of the invention according to claim 3 .
<< Effect 4 >> The function which suppresses that the inside of an oil separator is obstruct | occluded at the time of coldness increases.
As shown in FIGS. 1 and 2, the exhaust manifold (10) is provided, and the stay (8) is attached to the exhaust manifold (10), so that the heat of the exhaust manifold (10) passes through the stay (8). Is transmitted to the oil separator (3), and the condensed water in the oil separator (3) is difficult to freeze. For this reason, the function which suppresses that the inside of an oil separator (3) obstruct | occludes at the time of coldness increases.
(Invention according to claim 5)
The invention according to claim 5 achieves effect 1-1 of the invention according to claim 1, effect 3 of the invention according to claim 3, and effect 4 of the invention according to claim 4.

It is the perspective view which looked at the engine which concerns on embodiment of this invention from the back left side. It is the side view which looked at the engine of FIG. 1 from the left side. It is a rear view of the engine of FIG. It is a top view of the engine of FIG. It is a front view of the engine of FIG. It is the side view which looked at the engine of FIG. 1 from the right side.

  1 to 6 are views for explaining an engine according to an embodiment of the present invention. In this embodiment, a vertical in-line multi-cylinder diesel engine will be described.

The outline of this engine is as follows.
The direction of the crankshaft center axis (11) is the front-rear direction, and as shown in FIG. The direction.
As shown in FIG. 2, the cylinder head (12) is assembled to the upper part of the cylinder block (15), and the cylinder head cover (13) is assembled to the upper part of the cylinder head (12). As shown in FIG. 4, an intake manifold (14) is attached to one side of the cylinder head (12), and an exhaust manifold (10) is attached to the other side as shown in FIG. A gear case (16) is attached to the front portion of the cylinder block (15), and an engine cooling fan (6) is disposed in front of the gear case (16). A flywheel housing (17) is attached to a rear portion of the cylinder block (15), and a flywheel (18) is accommodated in the flywheel housing (17). As shown in FIG. 2, an oil pan (19) is assembled to the lower part of the cylinder block (15).

  As shown in FIGS. 1 to 4, this engine includes a breather chamber (1), a breather chamber outlet pipe (2), an oil separator (3), an oil separator outlet pipe (4), and an intake passage (5). The breather chamber (1) is connected to the blow-by gas inlet (3a) of the oil separator (3) via the breather chamber outlet pipe (2), and the blow-by gas outlet (3b) of the oil separator (3) is connected to the oil separator outlet pipe ( It is connected to the intake path (5) via 4).

  As shown in FIG. 4, the breather chamber (1) is disposed in the cylinder head cover (13). As shown in FIG. 1, the oil separator (3) is disposed behind an EGR cooler (20) disposed below the exhaust manifold (10). The oil separator (3) includes an oil filter inside and separates oil in blow-by gas sent from the breather chamber (1). As shown in FIG. 4, the connection part of the intake passage (5) to which the oil separator outlet pipe (4) is connected is the intake inlet pipe (22) attached to the air compressor (21a) of the supercharger (21). It is.

  As shown in FIGS. 1 to 3, this engine includes an engine cooling fan (6), and an oil separator (6 a) blown by the engine cooling fan (6) is defined as a rear direction. The blow-by gas inlet (3a) and the blow-by gas outlet (3b) of 3) are arranged on the rear side of the oil separator (3).

As shown in FIGS. 1 to 3, the engine includes a DPF housing case (7), and an outlet portion (2 a) of the breather chamber outlet pipe (2) and an oil separator outlet pipe below the DPF housing case (7). The inlet part (4a) of (4) is arranged.

  In the DPF housing case (7), DOC (not shown) is housed on the exhaust upstream side, and DPF (not shown) is housed on the exhaust downstream side. DOC is an abbreviation for diesel oxidation catalyst, and DPF is an abbreviation for diesel particulate filter. The DPF housing case (7) is disposed above the flywheel housing (17), behind the cylinder head (12) and the cylinder head cover (13), that is, above the rear part of the engine body (9).

  As shown in FIGS. 1 and 2, the outlet portion (2 a) of the breather chamber outlet pipe (2) and the inlet portion (4 a) of the oil separator outlet pipe (4) are rearwardly below the DPF housing case (7). It is flipped forward.

As shown in FIG. 1, the breather chamber outlet pipe (2) is connected to the rear of the cylinder head (12) from the reversal point, as shown in FIG. 4, behind the cylinder head cover (13), and from the cylinder head cover (13). It passes through the upper part in order and is connected to the breather chamber (1).
As shown in FIG. 4, the oil separator outlet pipe (4) is connected to the rear side of the exhaust manifold (10) from the reverse position, the exhaust turbine (21b) of the supercharger (21), and the cylinder head cover of the air compressor (21a) ( 13) It passes through the lateral side closer to it and is connected to the intake inlet pipe (22). A supercharging pipe (23) is led out from the air compressor (21a) toward the intake manifold (14).

As shown in FIGS. 1 to 4, this engine includes a stay (8), an oil separator (3) is attached to the engine body (9) via the stay (8), and the oil separator (3) 8) It is arranged on the rear side.
The stay (8) is made of metal. The oil separator (3) is disposed directly behind the stay (8), that is, in a position overlapping with the stay (8) when viewed in a direction parallel to the front-rear direction in the rear view.

  As shown in FIGS. 1 and 2, as described above, this engine includes the exhaust manifold (10), and the stay (8) is attached to the exhaust manifold (10). As shown in FIG. 2, the stay (8) is attached to a mounting seat (10a) of the exhaust manifold (10), and the mounting seat (10a) is integrally formed with the exhaust manifold (10).

(1) Breezer room
(2) Breezer room outlet pipe
(2a) Exit part
(3) Oil separator
(3a) Blow-by gas inlet
(3b) Blowby gas outlet
(4) Oil separator outlet pipe
(4a) Entrance part
(5) Intake route
(6) Engine cooling fan
(6a) Engine cooling air
(7) DPF storage case
(8) Stay
(9) Engine body
(10) Exhaust manifold

Claims (5)

A breather chamber (1), a breather chamber outlet pipe (2), an oil separator (3), an oil separator outlet pipe (4), and an intake passage (5) are provided. The breather chamber (1) is connected to the breather chamber outlet pipe (2). To the blow-by gas inlet (3a) of the oil separator (3), and the blow-by gas outlet (3b) of the oil separator (3) is connected to the intake path (5) via the oil separator outlet pipe (4). In the engine
An engine cooling fan (6) is provided, and the blowing direction of the engine cooling air (6a) blown by the engine cooling fan (6) is set to the rear direction, and the blow-by gas inlet (3a) and the blow-by gas outlet ( 3b) is arranged behind the oil separator (3) ,
A DPF housing case (7) is provided, and an outlet portion (2a) of the breather chamber outlet pipe (2) and an inlet portion (4a) of the oil separator outlet pipe (4) are arranged below the DPF case (7). , An engine characterized by that. The engine according to claim 1 ,
The outlet part (2a) of the breather chamber outlet pipe (2) and the inlet part (4a) of the oil separator outlet pipe (4) are inverted from the rear to the front under the DPF housing case (7). Engine. The engine according to claim 1 or 2 ,
A stay (8), an oil separator (3) is attached to the engine body (9) via the stay (8), and the oil separator (3) is disposed behind the stay (8). A featured engine. The engine according to claim 3 ,
An engine comprising an exhaust manifold (10) and a stay (8) attached to the exhaust manifold (10). A breather chamber (1), a breather chamber outlet pipe (2), an oil separator (3), an oil separator outlet pipe (4), and an intake passage (5) are provided. The breather chamber (1) is connected to the breather chamber outlet pipe (2). To the blow-by gas inlet (3a) of the oil separator (3), and the blow-by gas outlet (3b) of the oil separator (3) is connected to the intake path (5) via the oil separator outlet pipe (4). In the engine
An engine cooling fan (6) is provided, and the blowing direction of the engine cooling air (6a) blown by the engine cooling fan (6) is set to the rear direction, and the blow-by gas inlet (3a) and the blow-by gas outlet ( 3b) is arranged behind the oil separator (3) ,
A stay (8), an oil separator (3) is attached to the engine body (9) via the stay (8), and the oil separator (3) is arranged on the rear side of the stay (8) ;
An engine comprising an exhaust manifold (10) and a stay (8) attached to the exhaust manifold (10).

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