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JP-7857211-B2 - engine

JP7857211B2JP 7857211 B2JP7857211 B2JP 7857211B2JP-7857211-B2

Inventors

  • 津島 幸平
  • 正置 龍二
  • 柏原 浩

Assignees

  • ヤンマーホールディングス株式会社

Dates

Publication Date
20260512
Application Date
20221219

Claims (5)

  1. Crank axle and, A first gear attached to one end of the crankshaft, A second gear is attached to the other end of the crankshaft, A plurality of driven gears , three or more of which mesh with either the first gear or the second gear, Equipped with, The first gear meshes with the first driven gear among the plurality of driven gears that has the greatest driving torque at the engine's maximum output, The engine wherein the second gear meshes with the second driven gear among the plurality of driven gears that has the second largest driving torque at the engine's maximum output.
  2. The engine according to claim 1, wherein the first driven gear drives a fuel supply pump or a fuel injection pump.
  3. The engine according to claim 1, wherein at least one of the coolant pump and the lubricating oil pump is driven by the second driven gear.
  4. The engine according to any one of claims 1 to 3, wherein at least one of the first gear and the second gear is a spur gear.
  5. The engine according to any one of claims 1 to 3, wherein at least one of the first gear and the second gear is made of carbon steel for machine structures.

Description

This invention relates to an engine. Conventionally, engines are known that drive multiple auxiliary components, such as fuel injection pumps, coolant pumps, and lubricating oil pumps, using the power of the crankshaft (see, for example, Patent Document 1). Patent Document 1 discloses a configuration in which power is transmitted to the fuel injection pump, coolant pump, and lubricating oil pump by a crank gear attached to one end of the crankshaft. Japanese Patent Publication No. 2006-009655 Left side view showing the general configuration of the engine.Front view showing the general configuration of the engine.Plan view showing the general configuration of the engine.A schematic diagram illustrating the injectors found in an engine.A schematic diagram illustrating the cooling system of the engine.A schematic diagram illustrating the lubrication system of an engine.A schematic perspective view showing the crankshaft and auxiliary components driven by the rotation of the crankshaft, which are part of the engine.A perspective view showing the approximate configuration of the crankshaft of the engine.A diagram showing the approximate configuration of the gear arrangement at the rear of the engine.A diagram showing the approximate configuration of the gear arrangement at the front of the engine.Diagram illustrating the engine according to the first modified example.Diagram illustrating the engine related to the second modified example. The following describes exemplary embodiments of the present invention in detail with reference to the drawings. In the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system where appropriate. In the following description, the X direction is defined as the front-to-back direction, the Y direction as the left-to-right direction, and the Z direction as the up-and-down direction. The +X side is defined as the front, and the -X side as the rear. The +Y side is defined as the left side, and the -Y side as the right side. The +Z side is defined as the upper side, and the -Z side as the lower side. More specifically, the direction in which the center line J of the crankshaft (output shaft) shown in Figure 1 extends is defined as the front direction. The side on which the cylinder block 11 is positioned relative to the flywheel (not shown) housed in the flywheel housing 3 is defined as the front. The side on which the oil pan 2 is positioned relative to the cylinder block 11 is defined as the lower side, defining the up-and-down direction. The direction perpendicular to the front-to-back and up-and-down directions is defined as the left-to-right direction; when viewed from front to rear, the left side is defined as the left, and the right side is defined as the right. These directions are merely descriptive terms and are not intended to limit the actual positional relationships and directions. <1. Engine Overview> Figure 1 is a left side view showing a schematic configuration of engine 100 according to an embodiment of the present invention. Figure 2 is a front view showing a schematic configuration of engine 100 according to an embodiment of the present invention. Figure 3 is a top view showing a schematic configuration of engine 100 according to an embodiment of the present invention. The outline of engine 100 will be described mainly with reference to Figures 1 to 3. Engine 100 is, for example, an engine used for power generation. However, engine 100 is not limited to power generation engines; it may also be an engine used for other purposes, such as a ship propulsion engine. Engine 100 is a diesel engine. Engine 100 broadly comprises an engine body 1 and an oil pan 2. The engine body 1 comprises a cylinder block 11, a head block 12, and a head cover 13. Inside the cylinder block 11 are multiple pistons (not shown) and a crankshaft 10 (see Figures 7 and 8 below) connected to each piston and extending in the front-rear direction. In other words, the engine 100 includes a crankshaft 10. The crankshaft 10 converts the reciprocating motion of the pistons into rotational motion. A flywheel (not shown), housed in a flywheel housing 3, is attached to the rear end of the crankshaft 10. The flywheel rotates integrally with the crankshaft 10 and is used to extract power from the engine 100. The cylinder block 11 has multiple cylinders 14 (see Figure 4 below) arranged in the front-to-back direction on each of the left and right sides. Each of the multiple pistons is positioned within each cylinder 14. For example, the engine 100 is a V-type 12-cylinder engine, and the number of cylinders 14 arranged in the front-to-back direction on each of the left and right sides is six. The head block 12 is positioned on top of each cylinder 14. That is, the engine body 1 has six head blocks 12 arranged in the front-to-back direction on each of the left and right sides. Each head block 12 has an intake port (not shown) for supplying gas to the combustion chamber, whi