Vertical Canister Arrangement for Compact Fuel Evaporation Absorption
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Solution Overview
Problem
Saddle-ride type vehicles face challenges in accommodating a canister with the required absorption-chamber capacity due to their narrower side-to-side width, making it difficult to find space for the canisters and their associated piping.
Innovation Solution
A pair of canisters are vertically placed under one side of the fuel tank, with coupling pipes connecting them in series, and evaporated fuel and purge pipes are strategically routed to minimize space usage and prevent fuel droplet entry, utilizing the vehicle-body frame for outside air introduction and protection by the front shock absorber and tank bulging portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single large-capacity canister is used to ensure required absorption-chamber capacity, then evaporated fuel absorption capability is improved, but finding installation space becomes more difficult
Solution Approach 1:
The patent divides a single large canister into multiple smaller canisters (first canister and second canister) that are connected in series. This segmentation allows the canisters to be arranged in a compact vertical configuration under the fuel tank, fitting within the limited lateral space of the saddle-ride vehicle while collectively providing the required absorption-chamber capacity.
Solution Approach 2:
The patent transitions from a horizontal arrangement (typical in cars) to a vertical arrangement by placing the canisters one above the other under the fuel tank. This dimensional change充分利用 the vertical space available in the saddle-ride vehicle, enabling adequate absorption capacity within constrained lateral dimensions.
2Quantity of substance
If multiple canisters are used to ensure required absorption-chamber capacity, then evaporated fuel absorption capability is improved, but space for piping connected to the canisters becomes more difficult to find
Solution Approach 1:
The patent combines the piping routes by having the evaporated fuel introducing pipe and purge pipe share common connection points with the canisters. The coupling of canisters in series allows for integrated piping arrangement where pipes serve multiple functions and connect to both canisters efficiently, reducing the overall piping length and space requirements.
3Quantity of substance
If canisters are arranged to provide required absorption capacity, then evaporated fuel absorption capability is improved, but vehicle space utilization becomes more challenging
Solution Approach 1:
The patent nests the canisters within the existing vehicle structure by positioning them under the fuel tank, utilizing the space already defined by the fuel tank's location. The vertical stacking of canisters creates a nested configuration that fits within the vehicle's structural constraints without encroaching on other components.
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 allows for a compact arrangement of canisters with the necessary absorption capacity, reduces piping length, and minimizes the impact on engine performance by maintaining a steady air-fuel ratio, while preventing fuel droplet entry and water ingress.
Implementation Method 1
a canister for absorbing evaporated fuel generated in a fuel tank
Data Source
AI summary
A saddle-ride type vehicle for enabling the placement of canisters with a required absorption-chamber capacity in a compact manner. The saddle-ride type vehicle includes a head pipe supporting a steering shaft connecting with a handlebar; a vehicle-body frame connecting with the head pipe; a fuel tank placed to the rear of the head pipe and supported on an upper portion of the vehicle-body frame; and a pair of canisters for absorbing evaporated fuel introduced from the fuel tank. The canisters are vertically placed under one side portion of the fuel tank in a position along the vehicle-longitudinal direction.