JP6365310B2 - Internal combustion engine - Google Patents

Description

  The present invention relates to an internal combustion engine, and more particularly to an internal combustion engine provided with blow-by gas piping.

  An engine mounted on a vehicle such as an automobile is provided with a blow-by gas pipe. The blow-by gas pipe blows an air-fuel mixture or a combustion gas blown from the combustion chamber into the crank chamber through a gap between the piston and the cylinder. It circulates in the intake path as gas.

  Since the blow-by gas contains moisture, the moisture contained in the blow-by gas may freeze and block the blow-by gas piping when the outside air temperature is low.

  On the other hand, what prevents a blow-by gas from freezing conventionally by heating blow-by gas with the heat of engine cooling water is known (refer to patent documents 1). The thing of patent document 1 is equipped with the heating hose through which engine cooling water distribute | circulates, While extending this heating hose to blow-by gas piping, it is made to contact blow-by gas piping, and a heating hose is connected to blow-by gas piping. The blow-by gas piping is heated by heat conduction.

JP 2014-159746 A

  However, since the thing of patent document 1 is equipped with the heating hose extended to blow-by gas piping, there existed a problem that a structure would be complicated.

  The present invention has been made by paying attention to the above-described problems, and without complicating the structure, the moisture contained in the blow-by gas freezes and closes the blow-by gas piping when the outside air temperature is low. An object of the present invention is to provide an internal combustion engine that can prevent this.

  The first aspect of the present invention is purified by an internal combustion engine body, a turbocharger disposed on the side of the internal combustion engine body, an air cleaner disposed above the internal combustion engine body, and the air cleaner. An intake pipe for guiding air to the turbocharger, a blowby gas outlet provided at an upper portion of the internal combustion engine body, a blowby gas inlet provided in the intake pipe, the blowby gas outlet, and the blowby gas A blow-by gas pipe communicating with the inlet part and circulating the blow-by gas generated in the internal combustion engine body to the intake pipe, wherein the blow-by gas outlet part is connected to the turbocharger in the internal combustion engine body. The blow-by gas inlet portion is arranged in a vertical direction at a portion extending in the vertical direction of the intake pipe. Disposed at a position in the vicinity of the gas outlet portion, the blow-by gas piping, and a that are arranged so as to extend in the horizontal direction to the intake pipe from the internal combustion engine main body.

  Thus, according to said 1st aspect, a blow-by gas outlet part is arrange | positioned above the turbocharger in an internal combustion engine main body, and a blow-by gas inlet part is the vertical in the site | part extended in the perpendicular direction of intake piping. Since the blow-by gas piping is arranged in the direction near the blow-by gas outlet and extends in the horizontal direction from the internal combustion engine body to the intake piping, the blow-by gas piping can be shortened. For this reason, it can prevent that the temperature of blow-by gas falls while blow-by gas passes blow-by gas piping.

  In addition, since at least a part of the blow-by gas pipe is disposed above the turbocharger, the blow-by gas passes through the blow-by gas pipe when the blow-by gas pipe is heated by the outside air heated by the turbocharger. In the meantime, the blow-by gas is heated. Therefore, it is prevented that the temperature of blow-by gas falls while blow-by gas passes blow-by gas piping, and blow-by gas is heated.

  Further, since a heating hose or the like through which engine coolant flows is not required to heat the blow-by gas piping, the structure is not complicated.

  As a result, it is possible to prevent the moisture contained in the blow-by gas from freezing and closing the blow-by gas piping when the outside air temperature is low without complicating the structure.

FIG. 1 is a view showing an embodiment of the internal combustion engine of the present invention, and is a top view of the internal combustion engine. FIG. 2 is a view showing an embodiment of the internal combustion engine of the present invention, and is a right side view of the internal combustion engine. FIG. 3 is a view showing an embodiment of the internal combustion engine of the present invention, and is a front view of the internal combustion engine. FIG. 4 is a view showing an embodiment of the internal combustion engine of the present invention, and is a perspective view of the internal combustion engine. FIG. 5 is a view showing an embodiment of the internal combustion engine of the present invention, and is a top view of a cover member of the internal combustion engine. FIG. 6 is a view showing an embodiment of the internal combustion engine of the present invention, and is a right side view of a cover member of the internal combustion engine. FIG. 7 is a view showing an embodiment of the internal combustion engine of the present invention, and is a perspective view of a cover member of the internal combustion engine.

  Embodiments of an internal combustion engine according to the present invention will be described below with reference to the drawings. 1 to 7 are views showing an internal combustion engine according to an embodiment of the present invention.

  First, the configuration will be described. In FIG. 1, an engine 2 as an internal combustion engine is mounted on the front portion of a vehicle 1, and this engine 2 is mounted horizontally in an engine room 1B formed in front of a dash panel 1A of the vehicle 1. Yes. The dash panel 1A is provided in front of a driver seat (not shown), and partitions the engine room from the driver seat.

  In the present embodiment, the front and rear, left and right, and up and down directions are indicated by arrows in the drawing so as to coincide with the front and rear direction, the left and right direction, and the up and down direction as viewed from the driver seated in the driver's seat of the vehicle 1.

  1 to 4, the engine 2 includes a cylinder block 3, a cylinder head 4 provided on the upper part of the cylinder block 3, a cylinder head cover 5 that closes the upper end of the cylinder head 4, and a lower part of the cylinder block 3. The cylinder block 3, the cylinder head 4, the cylinder head cover 5, and the oil pan constitute an engine body 6 as an internal combustion engine body.

  The cylinder block 3 is formed with a plurality of cylinders (not shown). A piston (not shown) is reciprocally accommodated in the cylinder, and the reciprocating motion of the piston is caused by rotation of a crankshaft (not shown) accommodated in the cylinder block 3. Converted into movement.

  The cylinder head 4 accommodates intake / exhaust camshafts and intake / exhaust valves (not shown), and the cylinder head 4 is formed with a plurality of intake ports and exhaust ports (not shown). An intake manifold (not shown) is attached to the cylinder head 4, and this intake manifold distributes air to the intake port of each cylinder. A surge tank (not shown) is provided behind the cylinder head 4, and this surge tank is connected to an intake manifold and an intercooler 17 described later, and supplies air cooled by the intercooler 17 to the intake manifold. Yes.

  An exhaust manifold 7 is attached to the cylinder head 4, and the exhaust manifold 7 is attached to the cylinder head 4 so as to be positioned in front of the engine 2.

  The exhaust manifold 7 collects exhaust gases discharged from a plurality of exhaust ports (not shown) formed in the cylinder head 4 and discharges them to the catalytic converter 8.

  The catalytic converter 8 is provided on the downstream side of the exhaust manifold 7. The catalytic converter 8 removes harmful components from the exhaust gas by a catalyst housed therein, purifies the exhaust gas, and discharges it outside through an exhaust pipe (not shown).

  A heat insulating cover 10 is attached to the catalytic converter 8, and the heat insulating cover 10 covers the outer peripheral side surface and both ends in the vertical direction of the catalytic converter 8.

  Further, the engine 2 includes an intake air introduction pipe 12, an air cleaner 11, an intake air pipe 13, a turbo inlet pipe 14, and a turbocharger 15. Air introduced through the intake air introduction pipe 12 is supplied by the air cleaner 11. The filtered air is sequentially passed through the intake pipe 13 and the turbo inlet pipe 14 and compressed by the turbocharger 15.

  The air cleaner 11 is disposed above the engine body 6. The intake pipe 12 extends from the left front of the engine body 6 toward the air cleaner 11. The downstream end of the intake air introduction pipe 12 in the intake flow direction is connected to the front part of the left side surface of the air cleaner 11.

  The upstream end of the intake pipe 13 in the intake flow direction is connected to the rear part of the right side surface of the air cleaner 11. The intake pipe 13 extends forward from the rear portion of the right side surface of the air cleaner 11 on the right side above the engine body 6, then turns downward and extends downward on the front side above the engine body 6.

  A portion of the intake pipe 13 extending below the engine body 6 constitutes a vertical portion 13A extending in the vertical direction, and a blow-by gas inlet portion 13B is provided on the left side surface of the vertical portion 13A.

  On the other hand, the front surface of the cylinder head cover 5 has a wall-like vertical wall portion 6A extending in the vertical direction, and a blow-by gas outlet portion 6B is opened in the vertical wall portion 6A. That is, a blow-by gas outlet 6B is provided at the upper part of the engine body 6.

  The engine 2 includes a blow-by gas pipe 21, which connects the blow-by gas outlet part 6 </ b> B and the blow-by gas inlet part 13 </ b> B, and blow-by gas generated in the engine body 6 is supplied to the intake pipe 13. Circulated. The blow-by gas pipe 21 is formed in an L shape so as to bend rightward after extending forward from the blow-by gas outlet 6B and to communicate with the blow-by gas inlet 13B after extending right. .

  A turbo inlet pipe 14 is connected to the downstream end of the intake pipe 13 in the intake flow direction. The turbo inlet pipe 14 extends downward, then turns to the left, and is connected to a turbocharger 15 disposed in the lower front part of the engine body 6. Here, the front of the engine body 6 constitutes a part of the side of the engine body 6.

  The turbocharger 15 is connected directly below the collecting portion of the exhaust manifold 7 and compresses air introduced from the turbo inlet pipe 14 by the kinetic energy of exhaust gas discharged from the engine body 6.

  The engine 2 includes a first hose 16, an intercooler 17, and a second hose 18. The intercooler 17 is disposed in front of the engine body 6 so as to hit the traveling wind. The first hose 16 communicates the turbocharger 15 and the right side surface of the intercooler 17. The second hose 18 communicates the left side surface of the intercooler 17 and a surge tank (not shown) on the rear side surface of the engine body 6. As a result, the air compressed by the turbocharger 15 is introduced into the intercooler 17 through the first hose 16, then cooled by the traveling air in the intercooler 17, and then passed through the second hose 18 to the surge tank. To be introduced. The surge tank is connected to the intake manifold.

  In the present embodiment, the blow-by gas outlet 6 </ b> B is arranged above the turbocharger 15 in the engine body 6. Further, the blow-by gas inlet portion 13B is arranged at a position in the vertical direction in the vertical portion 13A of the intake pipe 13 in the vicinity of the blow-by gas outlet portion 6B. In other words, the vertical positions of the blow-by gas inlet portion 13B and the blow-by gas outlet portion 6B are substantially equal. Further, the blow-by gas pipe 21 is arranged so as to extend in the horizontal direction from the engine body 6 to the intake pipe 13.

  An oil filler cap 19 is disposed at a position above the engine body 6 and surrounded by the air cleaner 11, the intake pipe 13, and the blow-by gas pipe 21.

  As shown in any one of FIGS. 1 to 7, the engine 2 includes a cover member 20 that covers a part of the intake pipe 13 and the air cleaner 11 at the top of the engine body 6. A gap is provided between the cover member 20 and the upper surface of the engine body 6.

  A blow-by gas pipe covering portion 20A is provided on the right side of the front surface of the cover member 20. The blow-by gas pipe covering portion 20A is turbocharged from the upper part of the engine body 6 along the shape of the blow-by gas pipe 21. It protrudes in the horizontal direction above the vessel 15 and covers the upper side and the side of the blow-by gas pipe 21.

  The cover member 20 has a notch 20B above the oil filler cap 19. The cutout portion 20B is formed larger than the area of the oil filler cap 19 so that the oil filler cap 19 can pass therethrough, and is formed so as to face the oil filler cap 19 downward. The oil filler cap 19 is attached and detached from above the cover member 20 through the notch 20B. Further, a notch portion 20 </ b> C through which the intake air intake pipe 12 passes is formed on the left front side surface of the cover member 20.

  Next, the operation will be described. In the engine 2 of the present embodiment, the blow-by gas outlet portion 6B is disposed above the turbocharger 15 in the engine body 6, and the blow-by gas inlet portion 13B is in a vertical direction at a portion extending in the vertical direction of the intake pipe 13. The blow-by gas pipe 21 is arranged at a position in the vicinity of the blow-by gas outlet 6B so as to extend from the engine body 6 to the intake pipe 13 in the horizontal direction.

  In this way, the blow-by gas outlet portion 6B is disposed above the turbocharger 15 in the engine body 6, and the blow-by gas inlet portion 13B is blow-by gas outlet in the vertical direction at a portion extending in the vertical direction of the intake pipe 13. Since the blow-by gas pipe 21 is arranged in the vicinity of the portion 6B and extends in the horizontal direction from the engine body 6 to the intake pipe 13, the blow-by gas pipe 21 can be shortened.

  For this reason, it can prevent that the temperature of blow-by gas falls while blow-by gas passes blow-by gas piping 21.

  In addition, since at least a part of the blow-by gas pipe 21 is disposed above the turbocharger 15, the blow-by gas pipe 21 is heated by the outside air superheated by the turbocharger 15, so that the blow-by gas is blow-by. The blow-by gas is heated while passing through the gas pipe 21.

  Therefore, it is prevented that the temperature of blow-by gas falls while blow-by gas passes blow-by gas piping 21, and blow-by gas is heated.

  Further, since the heating hose through which the engine coolant flows is not required to heat the blow-by gas pipe 21, the structure is not complicated.

  As a result, it is possible to prevent the blow-by gas piping 21 from being blocked by freezing of moisture contained in the blow-by gas when the outside air temperature is low without complicating the structure.

  In the engine 2 of the present embodiment, a cover member 20 that covers a part of the intake pipe 13 and the air cleaner 11 is disposed on the upper portion of the engine body 6, and the turbocharger is disposed on the cover member 20 from the upper portion of the engine body 6. A blowby gas pipe covering portion 20 </ b> A that protrudes horizontally above 15 and covers the upper side and the side of the blowby gas pipe 21 is provided.

  As described above, the cover member 20 is provided with the blow-by gas pipe covering portion 20A that protrudes in the horizontal direction from the upper part of the engine body 6 to the upper side of the turbocharger 15 and covers the upper side and the side of the blow-by gas pipe 21. Further, since the traveling wind can be prevented from directly colliding with the intake pipe 13 and the blow-by gas pipe 21, it is possible to prevent the temperature of the blow-by gas passing through the blow-by gas pipe 21 from being lowered.

  Further, the air heated by the exhaust pipe connected to the turbocharger 15 can be guided into the cover member 20 from the blow-by gas pipe covering portion 20 </ b> A protruding upward from the turbocharger 15.

  For this reason, a part of the intake pipe 13, the air cleaner 11, and the blow-by gas pipe 21 can be warmed by the warm air guided into the cover member 20, so that the air passing through the air cleaner 11 and the intake pipe 13 and the blow-by The blow-by gas passing through the gas pipe 21 can be warmed.

  As a result, it is possible to prevent the moisture in the blowby gas introduced from the blowby gas pipe 21 to the blowby gas inlet 13B of the intake pipe 13 from being cooled by the air passing through the intake pipe 13 and freezing. It is possible to prevent the blow-by gas inlet 13B from being blocked.

  Further, the engine 2 of the present embodiment has an oil filler cap 19 disposed at an upper portion of the engine body 6 and surrounded by the air cleaner 11, the intake pipe 13, and the blow-by gas pipe 21, and the cover member 20 is Above the oil filler cap 19, there is a notch 20 </ b> B through which the oil filler cap 19 can pass.

  Thus, the cover member 20 has a notch above the oil filler cap 19 surrounded by the air cleaner 11, the intake pipe 13, and the blow-by gas pipe 21, so that the cover member 20 is heated by the exhaust pipe and is contained in the cover member 20. The taken-in air can be discharged out of the cover member 20 from the notch 20B after passing through the blow-by gas pipe 21.

  Thereby, since the flow of the air taken in by the cover member 20 and discharged | emitted from the notch 20B can be created, the air heated by the exhaust pipe can be made to contact the blow-by gas piping 21 efficiently.

  Therefore, it is possible to efficiently prevent the moisture contained in the blowby gas from freezing and closing the blowby gas pipe 21.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

2 ... Engine (internal combustion engine), 6 ... Engine body (internal combustion engine body), 6B ... Blow-by gas outlet, 11 ... Air cleaner, 12 ... Intake intake pipe, 13 ... Intake Piping, 13A ... vertical part (part extending in the vertical direction), 13B ... blow-by gas inlet, 15 ... turbocharger, 19 ... oil filler cap, 20 ... cover member, 20A ... Blow-by gas piping cover, 20B ... Notch, 21 ... Blow-by gas piping

Claims (3)

An internal combustion engine body;
A turbocharger disposed on a side of the internal combustion engine body;
An air cleaner disposed above the internal combustion engine body;
An intake pipe for guiding the air purified by the air cleaner to the turbocharger;
A blow-by gas outlet provided at an upper portion of the internal combustion engine body;
A blow-by gas inlet provided in the intake pipe;
In the internal combustion engine having a blow-by gas pipe that communicates the blow-by gas outlet part and the blow-by gas inlet part and circulates the blow-by gas generated in the internal combustion engine body to the intake pipe.
The blow-by gas outlet is disposed above the turbocharger in the internal combustion engine body,
The blowby gas inlet portion is arranged at a position in the vertical direction in the vicinity of the blowby gas outlet portion in a portion extending in the vertical direction of the intake pipe,
The internal combustion engine, wherein the blow-by gas pipe is disposed so as to extend in a horizontal direction from the internal combustion engine body to the intake pipe. A cover member that covers a part of the intake pipe and the air cleaner is disposed on the internal combustion engine body,
The cover member is provided with a blow-by gas pipe covering portion that protrudes in a horizontal direction from an upper part of the internal combustion engine main body to above the turbocharger and covers an upper side and a side of the blow-by gas pipe. Item 6. The internal combustion engine according to Item 1. An oil filler cap is disposed at a position surrounded by the air cleaner, the intake pipe, and the blow-by gas pipe at an upper part of the internal combustion engine body.
The internal combustion engine according to claim 1, wherein the cover member has a notch portion through which the oil filler cap can pass above the oil filler cap.