Fuel Supply System with Segmented Distribution Pipes for Pulsation Attenuation
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Solution Overview
Problem
Conventional fuel supply systems fail to fully reduce pulsation transmission among multiple fuel injection valves, leading to deviations in fuel injection amounts from target values due to unsynchronized injection orders and shared fuel distribution pipes.
Innovation Solution
A fuel supply system with separate distribution pipes and independent feed paths for non-successive fuel injection valve groups, where the first distribution pipe supplies fuel to one group and the second distribution pipe supplies fuel to another, with pressure reducing valves and return pipes to manage excess fuel, ensuring non-simultaneous operation and reduced pulsation influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fuel distribution pipe is used to supply fuel to multiple fuel injection valves, then the device complexity is reduced, but pulsation is transmitted among the fuel injection valves causing injection amount deviation
Solution Approach 1:
The fuel distribution system is segmented into multiple independent distribution pipes (first distribution pipe and second distribution pipe), each serving specific non-successive fuel injection valves. This segmentation isolates pulsation within each pipe, preventing cross-contamination between valves while maintaining a relatively simple overall structure.
2Productivity
If fuel injection valves operate in successive order sharing a common fuel path, then the productivity is improved, but pulsation from one valve affects subsequent valves causing injection accuracy to deteriorate
Solution Approach 1:
The fuel injection valves are divided into multiple groups (first fuel injection valve group and second fuel injection valve group) that operate in non-successive sequences. Each group is served by its own dedicated distribution pipe, allowing high-speed sequential injection while isolating pulsation effects within each group.
Solution Approach 2:
The fuel injection system employs periodic non-successive injection sequences where valves in the first group and valves in the second group alternate their operation. This periodic arrangement ensures that when one valve injects fuel, others are in different phases of their injection cycle, preventing pulsation accumulation and maintaining injection accuracy.
3Object-affected harmful factors
If the capacity of storage space is increased by connecting two fuel distribution pipes, then pulsation influence is reduced, but the device complexity and space requirement increase
Solution Approach 1:
Instead of increasing the capacity of a single storage space, the system segments the fuel distribution into multiple pipes with dedicated storage capacities. Each distribution pipe maintains sufficient storage capacity independently, reducing pulsation without requiring a large centralized storage space or complex interconnections.
Data Source
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AI summary
A fuel supply system for an engine having a plurality of cylinders is provided, which includes a plurality of fuel injection valves configured to inject fuel into the cylinders in a given order, a first distribution pipe configured to distributingly supply fuel to some of the plurality of fuel injection valves of which the fuel injection orders are not successive in the given order, a second distribution pipe configured to distributingly supply fuel to a remainder of the plurality of fuel injection valves of which the fuel injection orders are not successive in the given order, a fuel pump part configured to discharge fuel, a first feed pipe connecting a first discharge part of the fuel pump part with the first distribution pipe, and a second feed pipe connecting a second discharge part of the fuel pump part and the second distribution pipe.