Oil Control Valve Mounting Structure Heat Shield
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Solution Overview
Problem
The operation characteristics of oil control valve units in variable valve timing systems are deteriorated due to heat from radiators, and they are vulnerable to damage from flying stones and interference during vehicle body frame mounting.
Innovation Solution
The oil control valve unit is mounted on the side of the engine with a part of the vehicle body frame positioned between it and the heat exchanger, shielding it from heat and protecting it from flying stones, and external piping is used to directly supply high hydraulic pressure, simplifying the oil passage and avoiding interference with the cam chain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the oil control valve unit is mounted in the vicinity of the radiator, then it can be easily installed, but operation characteristics are deteriorated due to heat from the radiator
Solution Approach 1:
The patent introduces a heat shield as an intermediary component positioned between the radiator and the oil control valve unit. This heat shield blocks thermal radiation from the radiator, preventing heat from reaching the oil control valve unit and thus protecting its operation characteristics while maintaining the beneficial proximity for installation
2Temperature
If the oil control valve unit is mounted to protrude laterally from the radiator, then it can be exposed to traveling wind for cooling, but it cannot be protected from flying stones
Solution Approach 1:
The patent applies local quality by providing protective coverage only for the oil control valve unit without enclosing the entire radiator assembly. The heat shield and vehicle body frame create a localized protective zone around the oil control valve unit, allowing other areas to remain open for airflow while protecting the specific vulnerable component
3Volume of moving object
If the oil control valve unit is mounted near the radiator, then space is efficiently utilized, but it is vulnerable to heat and physical damage
Solution Approach 1:
The patent implements a nested arrangement where the oil control valve unit is positioned in the space between the radiator and the vehicle body frame. The heat shield is nested between the radiator and the oil control valve unit, creating a layered configuration that efficiently uses available space while providing multiple levels of protection
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 effectively shields the oil control valve unit from heat, protects it from flying stones, and ensures reliable operation by maintaining high hydraulic pressure and reducing pressure loss, while allowing for flexible mounting and avoiding interference with the vehicle body frame and cam chain.
Implementation Method 1
a part of the vehicle body frame is arranged between the oil control valve unit and the heat exchanger in a front and rear direction... heat from the heat exchanger is shielded by the part of the vehicle body frame
Data Source
AI summary
There is provided a mounting structure of an oil control valve unit configured to control a hydraulic pressure to a variable valve timing device of an engine. The engine is supported by a vehicle body frame. A heat exchanger is mounted in front of the engine. The oil control valve unit is mounted at a side of the engine. A part of the vehicle body frame is arranged between the oil control valve unit and the heat exchanger in a front and rear direction.