Engine device

Patent metadata

Field	Value
Publication number	US-10598124-B2
Application number	US-201716091833-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Apr 8, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

An engine device including, a cylinder block having one side portion to which a flywheel that is rotated integrally with a crankshaft is disposed. The engine device is provided with a starter that transmits a rotational force to the flywheel at a time of engine start. A flywheel housing, which accommodates the flywheel and includes a starter attachment pedestal for attaching the starter, is attached to the one side portion of the cylinder block. The starter is disposed inner side of the engine than a portion of the flywheel housing , the portion being located outermost in the engine with respect to a direction that is perpendicular to a direction along a crankshaft center and that is parallel to the cylinder head joining surface of the cylinder block.

First claim

The invention claimed is:

1. An engine device including a cylinder block having one side portion thereof to which a flywheel that is rotated integrally with a crankshaft is disposed, the engine device being provided with a starter configured to transmit a rotational force to the flywheel at a time of engine start, wherein:
a flywheel housing that accommodates the flywheel and that includes a starter attachment pedestal for attaching the starter is attached to the one side portion, and the starter is disposed inner side of an engine than a portion of the flywheel housing, the portion of the flywheel housing being located outermost in the engine with respect to a direction that is perpendicular to a crankshaft center direction and that is parallel to a cylinder head joining surface of the cylinder block,
the cylinder block is formed integrally with a pair of housing bracket portions and reinforcing ribs, the pair of housing bracket portions protruding from opposite side portions of the cylinder block extending along the crankshaft center direction, the pair of housing bracket portions protruding from end portions of the opposite side portions close to the one side portion, the reinforcing ribs being flared at their sides close to the corresponding housing bracket portions so that each of the reinforcing ribs is across each of the housing bracket portions and a side wall of each of the opposite side portions,
the flywheel housing has, in a peripheral edge portion thereof, the starter attachment pedestal at a location exposed to a bracket recessed portion that is formed by a peripheral edge portion of the housing bracket portion being recessed, and
the cylinder block has the reinforcing rib at a location near the bracket recessed portion.

2. The engine device according to claim 1 , wherein:
a gear case is provided in a space surrounded by the one side portion of the cylinder block, the housing bracket portions, and the flywheel housing, the gear case including a housing-side gear casing and a block-side gear casing,
the flywheel housing is provided with a starter attaching part including the starter attachment pedestal, and
the starter attaching part has a through hole in which an end portion of the starter with a Pinion gear is inserted, and the through hole is partitioned from an internal space of the sear case by a housing-side projecting portion provided to the flywheel housing, the housing-side projecting portion surrounding the housing-side gear casing.

3. The engine device according to claim 1 , further comprising:
a turbocharger lubricant pipe for circulating a lubricant to a turbocharger; and
an EGR cooler for cooling an EGR gas that is part of an exhaust gas and that is mixed with fresh air, wherein
the starter is disposed at a position overlapping neither the turbocharger lubricant pipe nor the EGR cooler when viewed from a cylinder head joining surface side.

4. The engine device according to claim 1 , wherein:
a motor shaft center of the starter is disposed below a crankshaft center with respect to a direction perpendicular to the cylinder head joining surface.

5. The engine device according to claim 1 , further comprising:
an oil cooler for heat exchange between a lubricant and a coolant, and an oil filter for purifying a lubricant; and
a bracket member configured to support the oil cooler and the oil filter, the bracket member being attached to the cylinder block, wherein
a coolant outlet, a coolant return port, a lubricant outlet, and a lubricant return port are provided in an attaching part of the cylinder block to which the bracket member is attached, and
via the bracket member, a coolant and a lubricant are circulated in the oil cooler, and a lubricant is circulated in the oil filter.

6. The engine device according to claim 5 , wherein:
the bracket member has a coolant inflow hole to be connected to the coolant outlet, and a coolant outflow hole to be connected to the coolant return port, and
a fluid passage cross-sectional area of the coolant outflow hole is smaller than a fluid passage cross-sectional area of the coolant inflow hole.

7. The engine device according to claim 5 , wherein:
the bracket member has, in a surface thereof parallel to a joining surface joined to the attaching part, an oil cooler attaching part to which the oil cooler is attached, and
the bracket member has, on a distal end side of a coupling portion provided upright on the oil cooler attaching part, an oil filter attaching part to which the oil filter is attached on the side opposite to the oil cooler.

Assignees

• Yanmar Co Ltd

Inventors

• KASHIWA Koki
• Naganawa Hiroaki

Classifications

• F01M1/10

  Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters · CPC title

• F02B67/00 Primary

  Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for · CPC title

• F02F7/0073 Primary

  Adaptations for fitting the engine, e.g. front-plates or bell-housings · CPC title

• F01M5/002

  Cooling · CPC title

• F01M11/03

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title