CNG Fuel Management Module Plug-and-Play Tank Configuration
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Solution Overview
Problem
Existing CNG fuel systems for refuse trucks are limited in flexibility, as they are typically designed for specific configurations and do not allow for easy connection of different types and configurations of fuel tanks, making it difficult to power and move the truck during the manufacturing process, especially when the main fuel tanks are connected by the body outfitter.
Innovation Solution
A CNG fuel system with a fuel management module that includes high-pressure connections for plug-and-play configuration with multiple fuel tanks, allowing for simultaneous or selective use of fuel tanks, and a temporary fuel tank for mobility before full assembly, integrated with a vehicle control system for streamlined operation and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a CNG fuel system is designed for a specific fueling configuration, then the system structure is simplified and easier to manufacture, but the adaptability to different fuel tank configurations is reduced
Solution Approach 1:
The fuel management module is designed with universal high-pressure connections that can interface with different fuel tank configurations. The module serves multiple functions: it can connect to a single fuel tank or multiple fuel tanks in series or parallel arrangements, and can work with various tank positions (front, rear, or both). This multi-functional design allows the same module to adapt to different fueling configurations without requiring custom-designed systems for each arrangement.
2Ease of manufacture
If the main fuel tanks are connected by the body outfitter during multi-step manufacturing, then the manufacturing process is modularized and flexible, but the vehicle lacks power for movement during transfer to the body outfitter
Solution Approach 1:
The fuel system is segmented into separate functional components that can be independently installed and tested. The fuel management module is pre-installed on the chassis by the OEM along with temporary fuel tank connections, allowing the vehicle to be mobile during manufacturing. The body outfitter can then independently connect the main fuel tanks to the pre-installed module without affecting vehicle mobility during the manufacturing process.
Solution Approach 2:
The fuel management module and temporary fuel tank connections are pre-installed on the chassis by the OEM before the body is attached. This preliminary action ensures the vehicle has functional fuel system and mobility capability during the manufacturing process, allowing it to be moved and tested before the body outfitter connects the main fuel tanks.
3Device complexity
If existing fuel systems are set up for specific fueling configurations, then the system design is simplified, but the freedom for connecting different types and configurations of fuel tanks is limited
Solution Approach 1:
The fuel management module incorporates dynamic switching capabilities with valves that can redirect fuel flow between different tanks based on configuration needs. The system can dynamically adapt its fuel delivery path to accommodate single-tank or multi-tank arrangements, series or parallel configurations, and various tank positions, all controlled through the module's switching mechanism without requiring complex custom wiring or piping for each configuration.
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 system provides increased flexibility in fuel tank configuration and mobility during manufacturing, reducing downtime and allowing for complete testing and integration of the fuel system before final assembly, while ensuring efficient fuel management and control.
Implementation Method 1
a low pressure fuel output connection in communication with the first and second high pressure connections for transferring fuel from the first and second fuel tanks to the engine
Data Source
AI summary
A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.