Camshaft-Driven Engine Pumps to Cut Belt Drive Complexity
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Solution Overview
Problem
Existing internal combustion engines face challenges in optimizing the placement of lubrication and cooling pumps, which can lead to inefficiencies and increased complexity in engine design.
Innovation Solution
The proposed solution involves a car with a powered internal combustion engine where the lubrication and cooling pumps are strategically positioned to enhance efficiency and reduce complexity, utilizing a configuration that allows for optimal placement and operation of these pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lubrication pump and cooling pump are driven directly by the drive shaft through smooth belt transmission, then the pumps can be positioned independently, but the engine design becomes more complex and requires additional transmission components
Solution Approach 1:
The patent extracts the pumps from the traditional drive shaft transmission system and relocates them to be directly driven by camshafts. This separation removes the need for additional belt transmission components between the drive shaft and pumps, simplifying the overall transmission system while maintaining placement flexibility.
Solution Approach 2:
The camshafts are given an additional function beyond valve operation. They now simultaneously drive both the lubrication pump and cooling pump, eliminating the need for separate dedicated drive mechanisms and reducing overall system complexity.
2Ease of operation
If additional transmission components are added to drive the pumps from the drive shaft, then the pumps can be positioned flexibly, but the number of components increases and the system becomes heavier
Solution Approach 1:
The patent removes unnecessary intermediate transmission components from the system. By having camshafts directly drive the pumps, components such as additional belts, pulleys, and mounting structures are eliminated, resulting in a lighter engine system.
3Ease of operation
If additional transmission components are added to drive the pumps, then the pumps can be positioned independently, but the cost of the engine system increases
Solution Approach 1:
The patent eliminates the need for additional transmission components, thereby reducing manufacturing costs associated with sourcing, assembling, and maintaining these extra parts.
Solution Approach 2:
By making the camshafts multi-functional (driving both valves and pumps), the patent reduces the total number of components that need to be manufactured and assembled, leading to cost savings in production.
4Ease of operation
If the pumps are driven by the drive shaft through belt transmission, then the system can accommodate pump placement requirements, but energy losses increase due to additional transmission stages
Solution Approach 1:
The patent removes intermediate transmission stages between the power source and pumps. By having camshafts directly drive the pumps, energy losses from belt friction, slippage, and additional mechanical conversions are eliminated, improving overall system efficiency.
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 minimizes the number of components needed to rotate the pumps, reduces load losses in the lubrication and cooling circuits, and results in a more cost-effective, lighter, and compact engine system.
Implementation Method 1
the lubrication and cooling pumps, which are strategically positioned to enhance efficiency and reduce complexity, utilizing a configuration that allows for optimal placement and operation of these pumps
Data Source
AI summary
A car having: two front wheels; two rear wheels; an internal combustion engine, which is provided with: a plurality of cylinders, where respective pistons slide on the inside, a drive shaft connected to the pistons, a plurality of intake valves and of exhaust valves operated by respective camshafts, and a cylinder head, where the camshafts are arranged; at least one lubrication pump configured to cause a lubricant oil to circulate; and at least one cooling pump configured to cause a coolant liquid to circulate. A camshaft axially projects out of the cylinder head on at least one side, and the lubrication pump is coaxial to the camshaft and is directly connected to the camshaft so as to be caused to rotate by the camshaft.