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EP-4390079-B1 - ENGINE

EP4390079B1EP 4390079 B1EP4390079 B1EP 4390079B1EP-4390079-B1

Inventors

  • NODA, Takehiro
  • MATSURA, Yoshimitsu
  • KASHIWABARA, HIROSHI

Dates

Publication Date
20260506
Application Date
20231205

Claims (8)

  1. An engine (100) that is a V-type engine comprising a first bank (LB, RB) and a second bank (LB, RB) arranged side by side in a left-right direction, characterized in that the engine (100) comprising: a first cooling liquid pipe (221L, 221R) and a second cooling liquid pipe (221L, 221R) disposed between the first bank (LB, RB) and the second bank (LB, RB) and extending in a front-rear direction; and an exhaust passage (6) disposed between the first bank and (LB, RB) the second bank (LB, RB) and extending in the front-rear direction and disposed below the first cooling liquid pipe (221L, 221R) and the second cooling liquid pipe (221L, 221R).
  2. The engine (100) according to claim 1, wherein the first bank (LB, RB), the first cooling liquid pipe (221L, 221R), the exhaust passage (6), the second cooling liquid pipe (221L, 221R), and the second bank (LB, RB) are arranged in the stated order from one side to another side in the left-right direction.
  3. The engine (100) according to claim 2, wherein at least one of the first cooling liquid pipe (221L, 221R) and the second cooling liquid pipe (221L, 221R) includes a first wall portion (2213, 2213A) extending downward.
  4. The engine (100) according to claim 3, wherein the cooling liquid pipe (221L, 221R) including the first wall portion (2213, 2213A) includes a second wall portion (2214, 2214A) extending from a lower end portion of the first wall portion (2213, 2213A) toward a closer one of the first bank (LB, RB) and the second bank (LB, RB).
  5. The engine (100) according to claim 1, wherein the exhaust passage (6) includes a first exhaust passage (6L, 6R) and a second exhaust passage (6L, 6R) arranged side by side in the left-right direction, the first exhaust passage (6L, 6R) and the second exhaust passage (6L, 6R) are formed by connecting a plurality of passage portions by connecting portions, and the first exhaust passage (6L, 6R) and the second exhaust passage (6L, 6R) are disposed with a position of the connecting portion of the first exhaust passage (6L, 6R) and a position of the connecting portion of the second exhaust passage (6L, 6R) being shifted in the front-rear direction.
  6. The engine (100) according to claim 1, further comprising an intake filter disposed above the first cooling liquid pipe (221L, 221R), wherein the intake filter either overlaps the first cooling liquid pipe (221L, 221R) in a plan view from above, or is disposed on an oppose side of the exhaust passage (6) with the first cooling liquid pipe (221L, 221R) interposed therebetween.
  7. The engine (100) according to claim 1, further comprising a blow-by gas passage (50) disposed above the first cooling liquid pipe (221L, 221R), wherein at least a part of the blow-by gas passage (50) either overlaps the first cooling liquid pipe (221L, 221R) in a plan view from above, or is disposed on an opposite side of the exhaust passage (6) with the first cooling liquid pipe (221L, 221R) interposed therebetween.
  8. The engine (1) according to claim 1, further comprising a cover member (70) that covers at least a part of the first cooling liquid pipe (221L, 221R), the second cooling liquid pipe (221L, 221R), and the exhaust passage (6).

Description

TECHNICAL FIELD The present invention relates to an engine. BACKGROUND ART Conventionally, a V-type engine in which an exhaust passage is disposed in an upper portion of the engine is known (see, for example, Patent Document 1). In Patent Document 1, left and right exhaust pipes disposed in the upper portion of the engine are disposed between left and right banks in a plan view from above. PRIOR ART DOCUMENT PATENT DOCUMENT Patent Document 1: Japanese Unexamined Patent Application Publication No. 2020-522646 SUMMARY OF INVENTION TECHNICAL PROBLEM Incidentally, an electronic control component such as an injector and an intake port for intake air may be disposed in the upper portion of the engine. When the exhaust passage is disposed in the upper portion of the engine, heat from the exhaust passage may be transmitted to the electronic control component, an intake portion for intake air, and the like, and thereby, affect the operation of the component itself or the engine. Document GB2055423A discloses a V-type engine with an exhaust passage disposed between a first bank and a second bank, extending in a front-rear direction and disposed below a cooling water jacket. An object of the present invention is to provide a technique, in a V-type engine, capable of suppressing the influence of heat from an exhaust passage on the surroundings. SOLUTION TO PROBLEM An exemplary engine of the present invention is an engine that is a V-type engine including a first bank and a second bank arranged side by side in a left-right direction, the engine including: a first cooling liquid passage and a second cooling liquid passage disposed between the first bank and the second bank and extending in a front-rear direction; and an exhaust passage disposed between the first bank and the second bank and extending in a front-rear direction and disposed below the first cooling liquid passage and the second cooling liquid passage. ADVANTAGEOUS EFFECTS OF INVENTION According to the exemplary present invention, in a V-type engine, it is possible to suppress the influence of heat from an exhaust passage on the surroundings. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a left side view showing a schematic configuration of an engine.FIG. 2 is a front view showing the schematic configuration of the engine.FIG. 3 is a plan view showing the schematic configuration of the engine.FIG. 4 is a schematic view showing a schematic configuration of a cooling system.FIG. 5 is a plan view showing a schematic configuration of left and right exhaust manifolds included in the engine.FIG. 6 is a schematic view showing a relationship between the exhaust manifold and a cooling liquid pipe.FIG. 7 is a perspective view showing a schematic configuration of a left cooling liquid pipe and a right cooling liquid pipe.FIG. 8 is a schematic view showing a relationship between the exhaust manifold, a first wall portion, and a second wall portion.FIG. 9A is a schematic view showing a modified example of a wall portion provided to the cooling liquid pipe.FIG. 9B is a schematic view showing a modified example of a wall portion provided to the cooling liquid pipe.FIG. 10 is a schematic view showing a relationship between an exhaust manifold and a filter.FIG. 11 is a schematic diagram for explaining a preferred embodiment of the engine. DESCRIPTION OF EMBODIMENTS Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, an XYZ coordinate system is shown as a 3D orthogonal coordinate system, as appropriate. In the following description, an X direction is defined as a front-rear direction, a Y direction is defined as a left-right direction, and a Z direction is defined as an up-down direction. A +X side is defined as a front side, and a -X side is defined as a rear side. A +Y side is defined as a left side, and a -Y side is defined as a right side. A +Z side is defined as an up side, and a -Z side is defined as a down side. Specifically, a direction in which a center line J of a crankshaft (output shaft) shown in FIG. 1 extends is defined as the front-rear direction. A side on which a cylinder block 11 is disposed with respect to a fly wheel (not shown) accommodated in a fly wheel housing 3 is defined as the front side. The up-down direction is defined with a side on which an oil pan 2 is disposed with respect to the cylinder block 11 being the down side. A direction orthogonal to the front-rear direction and the up-down direction is defined as the left-right direction, and the left side when viewed from the front toward the rear is defined as the left side and the right side when viewed from the front toward the rear is defined as the right side. These notations of directions are merely used for the purpose of explanation, and are not intended to limit an actual positional relationship and actual directions. <1. Overview of Engine> FIG. 1 is a left side view showing a schematic configuration of an en