# US 12,000,326 B2 · Engine system

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- Number: US 12,000,326 B2
- Document ID: US12000326B2
- Status: Granted
- Kind: B2
- Application number: 18/211,921
- Filed: 2023-06-20
- Published: 2024-01-11
- Granted: 2024-06-04
- Earliest claimed: 2022-07-06
- Assignees: Perkins Engines Company Limited
- Applicants: Perkins Engines Company Limited
- Inventors: Jamie Andrew Martin
- Web page: https://patentgrep.com/patent/US12000326B2

## CPC

- F01P 11/028: {Deaeration devices}
- F01P 11/0285: {Venting devices}
- F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence)
- F01P 5/10: Pumping liquid coolant; Arrangements of coolant pumps
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)

## Abstract

The present disclosure relates to an engine system having an engine and a cooling system. An engine vent line is fluidly connected to the engine for venting air from the engine system and bypassing the coolant flow circuit. The engine vent line has a hydraulic diameter and length selected to provide a predetermined engine head loss for the engine and a rate of flow of coolant in the at least one engine vent line at or below a maximum engine vent flow rate target during operation of the engine. The engine vent line comprises a helical section in which a portion is formed into a helix.

## Claims

### Claim 1

An engine system comprising:
an engine;
a cooling system comprising a cooling device, a coolant flow circuit fluidly connecting the engine and the cooling device and a pump for circulating coolant through the coolant flow circuit;
at least one engine vent line fluidly connected to the engine for venting air from the engine system and bypassing the coolant flow circuit, said at least one engine vent line having a hydraulic diameter and length selected to provide a predetermined engine head loss for the engine and a rate of flow of coolant in the at least one engine vent line at or below a maximum engine vent flow rate target during operation of the engine, said at least one engine vent line comprising a helical section in which a portion of the at least one engine vent line is formed into a helix.

### Claim 2 (depends on 1)

The engine system as claimed in claim 1 in which the at least one engine vent line is formed from a continuous hose and the helical section is provided by a coiled section of the hose.

### Claim 3 (depends on 1)

The engine system as claimed in claim 1 in which at least the helical section of the at least one engine vent line is extruded and thermoformed.

### Claim 4 (depends on 1)

The engine system as claimed in claim 1 in which at least the helical section of the at least one engine vent line is a moulded component defining a helical channel therein.

### Claim 5 (depends on 1)

The engine system as claimed in claim 1 in which the helical section is contained in a housing having one or more apertures in which at least a part of the helical section is visible.

### Claim 6 (depends on 1)

The engine system as claimed in claim 1 in which the helical section is formed from a transparent or semi-transparent material.

### Claim 7 (depends on 1)

The engine system as claimed in claim 1 in which the hydraulic diameter and length of the at least one engine vent line are selected to provide a predetermined engine head loss for the engine and a rate of flow of coolant in the at least one engine vent line above a minimum engine vent flow rate target during operation of the engine.