Engine

Patent metadata

Field	Value
Publication number	US-12228066-B2
Application number	US-202318119579-A
Country	US
Kind code	B2
Filing date	Mar 9, 2023
Priority date	Mar 10, 2022
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An engine includes: an engine block including a cylinder block and a head block, a cool liquid cooler that cools a first cool liquid that cools the engine block, a lubricant oil cooler that cools a lubricant oil using the first cool liquid or a second cool liquid, an exhaust manifold mounted to the engine block, a turbocharger driven by exhaust gas from the exhaust manifold, an exhaust communication pipe that communicates the exhaust manifold with the turbocharger, and a cool liquid flow channel through which a cool liquid discharged from the engine block flows in an order of the exhaust communication pipe and the exhaust manifold. The cool liquid cooler and the lubricant oil cooler are so placed as to be arranged side by side on one end side in a crankshaft direction.

First claim

The invention claimed is:

1. An engine comprising:
a cool liquid cooler configured to cool a first cool liquid, the first cool liquid configured to cool an engine block including a cylinder block and a head block;
a lubricant oil cooler configured to cool a lubricant oil using the first cool liquid or a second cool liquid,
two cylinder rows; and
a gear case placed between the engine block and the cool liquid cooler and/or the lubricant oil cooler, wherein the gear case has a bulkhead;
wherein the cool liquid cooler and the lubricant oil cooler are so placed as to be arranged side by side on one end side in a crankshaft direction;
wherein the cool liquid cooler and/or the lubricant oil cooler is mounted to the gear case,
wherein the gear case has an intra-case cool liquid flow channel through which the first cool liquid is configured to pass,
wherein the intra-case cool liquid flow channel includes a first flow channel placed upstream of the cool liquid cooler and a second flow channel placed downstream of the cool liquid cooler,
wherein the bulkhead partitions the first cool liquid flow channel from the second cool liquid flow channel,
wherein the first cool liquid flow channel provides cooling for one of the two cylinder rows, and the second cool liquid flow channel provides cooling for another of the two cylinder rows.

2. The engine as claimed in claim 1 , wherein at least one of the cool liquid cooler and the lubricant oil cooler includes a multi-plate heat exchange unit.

3. The engine as claimed in claim 1 , where the two cylinder rows are so placed as to be arranged side by side and extending in the crankshaft direction.

4. The engine as claimed in claim 1 , wherein:
the engine is a liquid-cooled engine, the engine including:
the engine block including the cylinder block and the head block,
an exhaust manifold mounted to the engine block,
a turbocharger configured to be driven by exhaust gas from the exhaust manifold,
an exhaust communication pipe configured to provide communication between the exhaust manifold and the turbocharger, and
a cool liquid flow channel through which a cool liquid discharged from the engine block is configured to flow in an order of the exhaust communication pipe and the exhaust manifold.

5. The engine as claimed in claim 4 , wherein the cool liquid flow channel includes a cool liquid collection pipe configured to collect the cool liquid discharged from a plurality of places of the engine block and discharge the cool liquid to the exhaust communication pipe.

6. The engine as claimed in claim 5 , wherein:
the exhaust manifold and the cool liquid collection pipe are placed parallel to a crankshaft, and
at least a part of the turbocharger is placed more on one side in the crankshaft direction than the exhaust manifold.

7. The engine as claimed in claim 6 , wherein at an end portion on another side in the crankshaft direction, a cool liquid flow channel component is placed to which the cool liquid flowing through the exhaust manifold is sent.

8. The engine as claimed in claim 7 , wherein the cool liquid flow channel component includes at least one of a thermostat case that encases a thermostat and the cool liquid cooler.

9. The engine as claimed in claim 1 , wherein:
the first cool liquid flow channel includes a first cool liquid collection pipe configured to collect a cool liquid having cooled one of the two cylinder rows, and
the second cool liquid flow channel includes a second cool liquid collection pipe configured to collect a cool liquid having cooled another of the two cylinder rows.

10. The engine as claimed in claim 9 , wherein the cool liquid entering the gear case from the first cool liquid collection pipe and/or the second cool liquid collection pipe is discharged to a thermostat case which cases the thermostat.

11. The engine as claimed in claim 1 , wherein the gear case has a shared cool liquid flow channel that is shared by both the first cool liquid flow channel and the second cool liquid flow channel.

12. The engine as claimed in claim 11 , wherein the shared cool liquid flow channel includes a flow channel that leads a cool liquid, which is discharged from the lubricant oil cooler that cools the lubricant oil, to the cool liquid pump.

13. The engine as claimed in claim 1 , wherein a part of the first cool liquid flow channel provided in the gear case includes a flow channel that leads a cool liquid, which is supplied from a cool liquid pump, to one of the two cylinder rows.

14. The engine as claimed in claim 1 , wherein a part of the second cool liquid flow channel provided in the gear case includes a flow channel that leads a cool liquid, which is supplied from a cool liquid pump, to another of the two cylinder rows.

Assignees

• Yanmar Holdings Co Ltd

Inventors

• Hirao Yu
• Matsuo Shinya

Classifications

• F01P3/12

  Arrangements for cooling other engine or machine parts · CPC title

• F02B75/22

  with cylinders in V, fan, or star arrangement · CPC title

• F01P2060/04

  Lubricant cooler · CPC title

• F01P2003/021

  Cooling cylinders · CPC title

• F01P11/08 Primary

  Arrangements of lubricant coolers (in lubrication apparatus F01M) · CPC title