Integrated Valve Assembly for Camshaft Timing
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Solution Overview
Problem
Existing camshaft timing adjustment systems are bulky, costly, and require separate valve assemblies, which complicates manufacturing and reduces engine capacity by driving hydraulic pumps with the crankshaft.
Innovation Solution
A compact valve assembly integrated within a hydraulic pump, featuring a central actuating through-hole and pin-like valve needle, allowing for efficient fluid flow management between high and low pressure ports, enabling fast and reliable camshaft timing adjustments without a separate valve actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate valve assembly is used for controlling hydraulic fluid flow in camshaft timing adjustment, then the system provides reliable flow control, but the system becomes bulky and complex with increased manufacturing cost
Solution Approach 1:
The valve assembly is integrated directly into the hydraulic pump housing, merging two previously separate components (pump and valve assembly) into a single unified structure. This eliminates the need for separate valve actuators and reduces the number of external connections, thereby maintaining flow control reliability while reducing system complexity and manufacturing cost
2Reliability
If a traditional hydraulic pump with separate valve assembly is used, then the system provides adequate timing adjustment, but it increases system weight and manufacturing cost
Solution Approach 1:
By integrating the valve assembly into the pump housing, the overall system weight is reduced through elimination of redundant components and structures. The merged design maintains timing adjustment reliability while achieving weight reduction through component consolidation
3Ease of operation
If a separate valve actuator is used for controlling the valve assembly, then the system provides precise flow control, but it complicates manufacturing and increases cost
Solution Approach 1:
The valve actuator function is integrated directly into the pump housing structure, eliminating the need for separate external actuators. This integration maintains precise flow control capability while significantly simplifying manufacturing processes and reducing assembly complexity
Solution Approach 2:
The pump housing is designed to serve multiple functions: it houses the hydraulic pump mechanism, incorporates the valve assembly, and provides the actuating mechanism. This multi-functionality eliminates the need for separate dedicated components, simplifying manufacturing while maintaining operational precision
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
The integrated valve assembly reduces system weight and cost, enhances manufacturing simplicity, and allows for immediate camshaft timing adjustments without imposing load on the crankshaft, resulting in a more efficient and compact camshaft timing adjustment system.
Implementation Method 1
a hydraulic pump connected to the valve assembly and configured to pump the hydraulic fluid from the low pressure port to the high pressure port
Implementation Method 2
The valve assembly has a first state for enabling a flow of the hydraulic fluid from the high pressure port to the first control port and from the second control port to the low pressure port
Data Source
AI summary
A valve assembly for controlling an apparatus for camshaft timing adjustment being driven by a hydraulic pump, having a valve body with a first control port, a second control port, a high pressure port and a low pressure port, the valve assembly having a first state for enabling a flow of a hydraulic fluid from the high pressure port to the first control port and from the second control port to the low pressure port, respectively, and a second state for enabling a flow of the hydraulic fluid from the high pressure port to the second control port and from the first control port to the low pressure port, respectively. The valve body has central actuating through-hole extending axially through the valve body defining an axial direction.