Dual-Fuel Spool Switch Assembly for Leak-Safe Fuel Changeover
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Solution Overview
Problem
Existing dual-fuel engines have a cumbersome and inefficient operation due to separately provided fuel and gas switches, leading to potential risks like fuel leakage and engine damage from complex structures and tedious operations.
Innovation Solution
A dual-fuel integrated switch with a spool and valve body design that allows for simultaneous control of gasoline and second fuel flow through a single mechanism, utilizing a rotary disk and inching switches for simplified operation and reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fuel switch and gas switch are provided, then each fuel can be controlled independently, but the structure becomes complicated and operation becomes tedious
Solution Approach 1:
The patent combines the fuel switch and gas switch into a single integrated switch assembly. The spool valve integrates both fuel flow control and gas flow control functions, allowing independent control of each fuel while reducing the number of separate components. The rotary disk with positioning sections coordinates both fuel and gas valve states simultaneously, simplifying the overall structure while maintaining independent control capability.
Solution Approach 2:
The integrated switch assembly serves multiple functions: it controls fuel flow, controls gas flow, prevents simultaneous opening of both valves, and provides operational feedback through positioning sections. This multi-functional design eliminates the need for separate switches while maintaining independent control of each fuel type.
2Reliability
If separate fuel switch and gas switch are provided, then each fuel can be controlled independently, but the operation becomes tedious and inefficient
Solution Approach 1:
By merging the control of fuel and gas into a single rotary switch operation, the system allows users to control both fuel flows with one hand operation. The rotary disk's positioning sections provide tactile feedback for precise control, making the operation more efficient and less tedious while maintaining independent fuel control capability.
3Reliability
If separate fuel switch and gas switch are provided, then each fuel can be controlled independently, but the production cost increases
Solution Approach 1:
The patent reduces production costs by combining multiple separate components (fuel switch, gas switch, coordination mechanisms) into a single integrated switch assembly. This reduces the number of parts that need to be manufactured, assembled, and quality-checked, thereby lowering production costs while maintaining the reliability of independent fuel control.
4Adaptability or versatility
If manual operation of multiple switches is required, then fuel switching is possible, but the risk of fuel leakage and engine damage increases
Solution Approach 1:
The integrated switch assembly incorporates a coordination mechanism that prevents the simultaneous opening of both fuel and gas valves. The positioning sections and mechanical linkage ensure that when one fuel valve is open, the other remains closed, eliminating the risk of fuel leakage and engine damage from simultaneous fuel entry while maintaining versatile fuel switching capability.
Data Source
AI summary
A dual-fuel integrated switch includes a bracket. A valve body is provided on one side of the bracket. The inside of the valve body is provided with a spool adapted to the valve body. The spool rotates in the valve body. The first flow passage and the second flow passage communicating with the first flow passage are provided in the spool, an arc-shaped groove is provided on the outer wall of the spool, and the third flow passage adapted to the groove is provided on the side wall of the valve body. The number of the third flow passages is two, and the arc formed by the third flow passage on the side wall of the valve body is the same as the arc at the outer end of the side wall of the groove.