Engine Water Jacket with Segmented Coolant Passages

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Solution Overview

Problem

Conventional engine cooling systems cannot independently adjust the flow rate of coolant around the exhaust port, leading to compromised cooling performance and potential heat damage to the cylinder head, requiring increased radiator and cooling fan capacity or risking cylinder head damage from inadequate heat management.

Innovation Solution

A water jacket system with fluidly separated coolant passages for the combustion chamber and exhaust port, allowing independent control of coolant flow rates through a coolant control valve adjusted by a controller based on engine RPM and temperature sensors to optimize coolant flow according to operating conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the flow rate of coolant passing around the exhaust port is increased, then heat transfer to coolant increases and cooling performance improves, but the overall cooling performance of the vehicle deteriorates and radiator capacity must be increased

Engineering Contradiction:

Improvecoolant temperature around exhaust portVSAvoidoverall cooling performance

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The patent divides the coolant passage system into two independent circuits: a first coolant passage for the combustion chamber and a second coolant passage for the exhaust port. This segmentation allows independent control of coolant flow rates to each area, enabling optimized heat transfer at the exhaust port without compromising overall engine cooling performance.

Inventive Principle:

Principle #1Segmentation

2Loss of energy

If the flow rate of coolant passing around the exhaust port is decreased, then overall cooling performance improves, but the cylinder head may be damaged due to heat from emissions

Engineering Contradiction:

Improvecooling performanceVSAvoidcylinder head integrity

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

By segmenting the coolant system into separate passages for the combustion chamber and exhaust port, the patent enables independent flow rate control. This ensures that the exhaust port receives sufficient coolant flow for reliable heat dissipation and protection against thermal damage, while the combustion chamber cooling is optimized separately for overall cooling efficiency.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If the first coolant passage and second coolant passage are directly connected, then system complexity is reduced, but independent adjustment of coolant flow rate around the exhaust port is impossible

Engineering Contradiction:

Improvecoolant passage configurationVSAvoidcoolant flow rate adjustment capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements segmentation by creating two separate coolant passages instead of a single connected system. Although this increases system complexity slightly, it provides the adaptability needed to independently adjust coolant flow rates to match different engine operating conditions, preventing both overheating and excessive cooling.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic control capability by enabling independent adjustment of coolant flow rates in the second passage surrounding the exhaust port based on operating conditions. This dynamic adaptability allows the cooling system to respond to varying thermal demands of different engine operating states.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution improves engine cooling performance, prevents heat damage to the cylinder head and exhaust system, and enhances fuel efficiency by dynamically adjusting coolant flow rates based on engine conditions.

Implementation Method 1

a coolant control valve that controls the flow rate and/or flow direction of a coolant

Methodology Applied

Scientific EffectFluid flow control:

Implementation Method 2

utilizing the coolant as a liquid heat transfer medium in various warm-up operations

Methodology Applied

Scientific EffectHeat transfer:

Implementation Method 3

The coolant circulates in the water jacket to cool the engine

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 4

a water jacket and a radiator to cool the engine

Methodology Applied

Scientific EffectHeat dissipation:

Data Source

PatentUS10858981B2Water jacket of engine and engine cooling system having the same

Publication Date: 2020.12.08 HYUNDAI MOTOR CO LTD

AI summary

A water jacket of an engine may include: a block-side water jacket formed in a cylinder block of the engine and surrounding a cylinder of the cylinder block; and a head-side water jacket formed in a cylinder head of the engine and surrounding a combustion chamber and an exhaust port of the cylinder head. In particular, the head-side water jacket includes: a first coolant passage surrounding the combustion chamber of the cylinder head, and a second coolant passage surrounding the exhaust port of the cylinder head, and the second coolant passage is fluidly separated from the first coolant passage.