Utility Vehicle Powertrain Cooling Circuit Design
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Solution Overview
Problem
Vehicles equipped with forced-air inducers, such as superchargers or turbochargers, face the challenge of increased air temperature due to compression, which can lead to inefficient engine performance unless effectively cooled, and existing cooling systems may not adequately address this issue across various operating conditions.
Innovation Solution
A vehicle powertrain assembly incorporating a cooling assembly with a first cooling circuit to regulate engine temperature and a second cooling circuit to cool intake air, including a heat exchanger system that extends from the front to the rear of the lower frame, ensuring efficient temperature management for both the engine and air intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a forced-air inducer (supercharger or turbocharger) is used to compress pre-combustion air, then the power output of the powertrain assembly is increased, but the temperature of the compressed air increases
Solution Approach 1:
An intercooler is introduced as an intermediary component between the forced-air inducer and the engine. The intercooler acts as a heat exchanger that removes excess heat from the compressed air, cooling it before it enters the engine. This mediator component resolves the contradiction by allowing power output to be increased through compression while preventing the harmful effect of excessive air temperature.
2Temperature
If an intercooler is provided to cool the charged air, then the temperature of the intake air is maintained, but the complexity of the cooling system increases
Solution Approach 1:
The cooling assembly is designed to serve multiple functions simultaneously. The same cooling system cools both the engine and the charged air through integrated cooling circuits. The first cooling circuit cools the engine while the second cooling circuit (through the intercooler) cools the charged air. This multi-functionality reduces overall system complexity compared to having separate independent cooling systems for each function.
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
The described cooling system effectively maintains optimal temperatures for the engine and intake air, enhancing powertrain performance and efficiency by preventing overheating and ensuring consistent power output across varying conditions.
Implementation Method 1
a first cooling circuit configured to alter a temperature of the engine
Implementation Method 2
a second cooling circuit configured to alter a temperature of intake air received within the engine
Implementation Method 3
compressing the pre-combustion air may increase the temperature of the air
Data Source
AI summary
A utility vehicle includes a plurality of ground-engaging members, a frame supported by the ground-engaging members, and a powertrain assembly. The powertrain assembly includes an engine, a shiftable transmission, a continuously variable transmission, and a charger. Additionally, the utility vehicle may include a cooling assembly fluidly coupled to at least the engine and the charger.