Pressure-Actuated Valve for Piston Cooling Oil Control
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Solution Overview
Problem
The use of solenoid valves in internal combustion engines for controlling piston cooling jets increases system complexity, wiring complexity, and costs due to the need for dedicated software and wiring harnesses, as well as higher component costs.
Innovation Solution
A mechanical valve that controls piston cooling jets using oil and air pressure, eliminating the need for a solenoid valve and ECU control, with a valve element actuated by pressure differences to manage oil flow to piston cooling jets based on engine speed and load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solenoid valve is used to control piston cooling jets, then precise control of cooling oil flow is achieved, but system complexity and wiring complexity increase
Solution Approach 1:
The patent replaces the solenoid valve (electromechanical system) with a purely mechanical pressure-sensitive valve element that responds directly to pressure differences between intake air and engine oil, eliminating the need for electrical control systems while maintaining automatic regulation of cooling oil flow
Solution Approach 2:
The valve element automatically regulates cooling oil flow based on the natural pressure differences that exist during engine operation, without requiring external control signals, wiring, or electronic components. The system uses itself (pressure differential) to control itself
2Reliability
If a solenoid valve controlled by ECU is used, then piston cooling can be precisely managed, but costs and wiring complexity increase
Solution Approach 1:
The patent eliminates the solenoid valve and ECU control software by using a mechanical pressure-sensitive valve element that automatically responds to pressure differences, significantly reducing component costs and manufacturing complexity while maintaining effective cooling control
Solution Approach 2:
The patent extracts and removes the expensive solenoid valve and ECU control software from the system, replacing them with a simple mechanical valve element that provides the same cooling control function without the associated costs
3Reliability
If a dedicated PCJ oil gallery separated by solenoid valve is provided, then piston cooling is optimized, but device complexity increases
Solution Approach 1:
The patent merges the cooling control function into the existing oil gallery system by using a pressure-sensitive valve element that directly modulates flow through the dedicated PCJ oil gallery, eliminating the need for a separate solenoid valve while maintaining cooling optimization
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 simplifies the engine system by reducing the number of components and wiring complexity, lowers costs, and improves reliability by allowing precise control of piston cooling jets without the need for solenoid valves or specialized software, while optimizing cooling and lubrication based on engine operating conditions.
Implementation Method 1
a valve element configured to be actuated by the pressure of oil entering the oil inlet and of air entering the air inlet
Data Source
AI summary
A valve for controlling piston cooling jets in an internal combustion engine is disclosed. The valve includes a valve body equipped with an oil inlet for drawing oil from an oil gallery and an oil outlet for connection with a piston cooling jet gallery. The valve body is equipped with an air inlet for drawing air from an intake manifold of the engine, and with a valve element configured to be actuated by the pressure of the oil entering the oil inlet and of the air entering the air inlet.