Supercharged Engine Electric Coolant Pump Layout
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Solution Overview
Problem
Existing supercharged engines face challenges in compactly integrating an electrically operated coolant pump due to its large size, which can lead to inefficient cooling water supply rates as they depend on engine rotational speed, often exceeding the required rate.
Innovation Solution
The engine design positions the electrically operated coolant pump closer to the engine's center, with a perpendicular motor shaft and strategic mounting on the crankcase and cylinder assembly, allowing for a compact layout by utilizing available space efficiently and optimizing coolant pipe orientation to reduce space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrically operated coolant pump is installed to supply cooling water at a required rate, then cooling performance is improved, but the pump occupies a large space and cannot be installed in a compact layout
Solution Approach 1:
The patent repositions the coolant pump from a conventional location to the crankcase area, utilizing three-dimensional space optimization. The pump is mounted on the crankcase in a region that would otherwise be underutilized, effectively adding a new spatial dimension for component placement without increasing the engine's overall footprint.
Solution Approach 2:
The crankcase serves multiple functions: it houses the crankshaft mechanism and simultaneously provides mounting space for the coolant pump. This multi-functional use of the crankcase area allows the pump to be integrated without requiring additional dedicated space, resolving the contradiction between pump installation and compact layout.
2Volume of moving object
If a mechanically driven water pump is used, then the layout remains compact, but the cooling water supply rate depends only on engine rotational speed and may exceed the required rate
Solution Approach 1:
The patent replaces the mechanically driven water pump with an electrically operated coolant pump. This substitution allows the pump to be driven by an electric motor independent of the engine's mechanical system, enabling precise control of the cooling water supply rate based on intercooler operation requirements rather than being solely dependent on engine rotational speed.
Solution Approach 2:
The electrically operated pump enables dynamic adjustment of the cooling water supply rate according to actual intercooler operation conditions. The system can adapt the coolant flow in real-time based on thermal demands, whereas a mechanically driven pump would provide a fixed flow rate determined only by engine speed.
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 configuration enables the electrically operated coolant pump to supply cooling water at the necessary rate based on intercooler operation, achieving a compact installation while maintaining effective cooling performance.
Implementation Method 1
an electrically operated coolant pump (33) actuatable by an electric motor (111)
Implementation Method 2
a liquid-cooled intercooler (32) for cooling supercharging air that is supplied from the supercharger (31)
Data Source
AI summary
A supercharged engine having an electrically operated water pump for supplying cooling water to an intercooler in a compact layout. The supercharged engine includes a supercharger disposed rearwardly of a cylinder assembly of the engine, a drive pulley mounted on a supercharger drive shaft of the engine, a driven pulley mounted on an input shaft of the supercharger, a drive belt trained around the drive pulley and the driven pulley, an intercooler for cooling supercharging air that is supplied from the supercharger, and an electrically operated water pump for delivering cooling water under pressure to the intercooler. The supercharged engine also includes a belt tensioner for tensioning the drive belt. The electrically operated water pump is disposed on a crankcase which is positioned more closely to the center of the engine across the width thereof in directions along a crankshaft of the engine than the belt tensioner.