Vehicle Engine Pressurization System for Water Protection
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Solution Overview
Problem
Timing belt and starter motor components are not designed to operate submerged, leading to water and debris ingress, and existing solutions for pressurizing engine crankcases do not effectively address the issue of water intrusion in these components.
Innovation Solution
A pressuring system that introduces pressurized gases into the timing belt cover and starter motor cavities using a network of sealed pipes connected to the intake manifold, with control valves and pressure sensors managed by an electronic control module to maintain a permanent overpressure and prevent water, dust, and debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If timing belt and starter motor components are operated in submerged conditions, then the vehicle can function in water, but water and debris ingress into the components causing damage
Solution Approach 1:
The system applies preliminary anti-action by creating overpressure in the crankcase before water intrusion can occur. The pressurization system proactively establishes a pressure barrier that prevents water and debris from entering the timing belt cover and starter motor cavities, rather than attempting to seal or block entry points directly.
Solution Approach 2:
The pressurized gases in the crankcase serve as an intermediary barrier between the external submerged environment and the internal components. This gas pressure acts as a mediator that physically blocks water and debris from reaching the timing belt and starter motor components through any potential openings or seals.
2Reliability
If exhaust gases are diverted into the crankcase to build up pressure, then water ingress is prevented, but engine performance is reduced due to loss of exhaust flow
Solution Approach 1:
The system applies partial action by using only the portion of exhaust gases that would otherwise be wasted or excess gases that do not contribute to engine performance. The control valve regulates the diversion to provide just enough pressurization to prevent water ingress without significantly impacting exhaust flow and engine performance.
Solution Approach 2:
The control valve operates periodically or conditionally, diverting exhaust gases only when water intrusion risk is detected or during specific operating conditions. This periodic action allows the system to maintain engine performance during normal operation while providing protection when needed, rather than continuously diverting exhaust gases.
3Reliability
If external air is supplied directly into the crankcase via a dedicated intake pipe, then pressure is built up to prevent water ingress, but device complexity increases
Solution Approach 1:
The system applies universality by using existing engine components for pressurization. The intake manifold, which already exists in the engine, is used as the source of pressurized air, eliminating the need for a separate dedicated intake pipe. The exhaust system is also utilized as the pressurization source in alternative embodiments, further reducing the need for additional components.
Solution Approach 2:
The engine's own operating systems serve the dual function of propulsion and water protection. The exhaust gases, which are already being produced and vented, are redirected to pressurize the crankcase. This self-service approach uses existing resources within the engine system rather than requiring external or dedicated pressurization equipment.
4Productivity
If control valves and pressure sensors are added to optimize gas usage, then engine performance is optimized, but device complexity increases
Solution Approach 1:
The system implements feedback through pressure sensors that monitor the crankcase pressure and control valves that adjust gas diversion based on these readings. This feedback mechanism ensures that pressurization is maintained at optimal levels for preventing water ingress while minimizing gas diversion to preserve engine performance, creating a self-regulating system.
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
Effectively minimizes water and debris ingress into timing belt and starter motor cavities, protecting internal components by maintaining a controlled overpressure, even in submerged conditions, while optimizing engine performance by minimizing unnecessary gas usage.
Implementation Method 1
The pressurization system introduces pressurized gases into the timing belt cover and starter motor cavities using a network of sealed pipes connected to the intake manifold... to maintain a permanent overpressure and prevent water, dust, and debris entry
Data Source
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AI summary
A pressuring system (24) for a vehicle engine (20) comprising: - an intake manifold (44) into which ambient gases flows; - a control valve (58) connected to the intake manifold (44); - an engine block (34) connected to the intake manifold (44) and connected to a gases outlet (37); - a timing belt cover (28) connected to the engine block (34) and forming a timing belt cavity (26); - a timing belt (46) mounted within the timing belt cavity (26); and - a gases pipe (54) connected between the control valve (58) and the timing belt cover (28) for feeding pressurized gases from the intake manifold (44) to the timing belt cavity (26).