Fuel Pump Pressure Sensor Integration for Marine Diesel
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Solution Overview
Problem
Existing fuel supply systems for internal combustion engines, particularly large marine diesel engines, face challenges in reliably checking the function of high-pressure pumps due to long fuel lines, making maintenance and pressure regulation difficult and costly.
Innovation Solution
Integrating pressure sensors on the valve carriers of each high-pressure fuel pump to detect delivery pulses and absolute pressures, allowing for a direct functional check and pressure control, with redundant sensors ensuring system reliability even if one fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure sensors are mounted remotely (e.g., at purge valve) to monitor high-pressure section, then pressure regulation is possible, but functional testing of individual fuel pumps becomes unreliable due to long fuel lines
Solution Approach 1:
The patent divides the monitoring function by assigning individual pressure sensors to each fuel pump's valve carrier, allowing independent functional testing of each pump. This segmentation enables localized measurement at the pump level rather than remote monitoring, resolving the reliability issue while maintaining manageable system complexity through modular sensor placement
Solution Approach 2:
The valve carrier serves as an intermediary structure that hosts the pressure sensor in direct proximity to the fuel pump's delivery valve. This intermediary positioning allows the sensor to capture delivery pulse pressure directly at the source, eliminating the need for long fuel lines and ensuring reliable functional testing
2Reliability
If multiple pressure sensors are installed on each fuel pump for functional testing, then pump reliability improves, but system cost and complexity increase
Solution Approach 1:
Each pressure sensor mounted on the valve carrier serves multiple functions: it monitors delivery pulse pressure for functional testing of the associated fuel pump, and simultaneously contributes to overall system pressure regulation. This multi-functionality achieves reliable pump monitoring without requiring separate dedicated sensors for each function, thereby controlling system complexity
Solution Approach 2:
The patent combines the functional testing capability with the existing pressure control system by utilizing the same pressure sensors for both purposes. The delivery pulse detection for functional testing is merged with the pressure monitoring function already present in the common rail system, avoiding the need for separate testing infrastructure
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
Enables a simple, reliable, and cost-effective functional check of fuel pumps, facilitating timely maintenance and ensuring stable pressure regulation in the fuel supply system.
Implementation Method 1
a pressure sensor is mounted on the valve carrier of each of the parallel-connected fuel pumps, in particular each of the parallel-connected high-pressure fuel pumps, with the aid of which at least delivery pulses of the respective fuel pump can be detected
Data Source
Figure 1
AI summary
Fuel supply unit for an internal combustion engine, in particular a common rail fuel supply unit for a marine diesel internal combustion engine using fuel oil, having multiple fuel pumps connected in parallel in a pressure control circuit, in particular having multiple parallel-connected high-pressure fuel pumps (2), wherein each of the fuel pumps has a pump piston (16) guided movably in a pump cylinder (15) and a valve support (19) bearing a low-pressure-side intake valve (17) and a high-pressure-side delivery valve (18), wherein each valve support (19) of each of the parallel-connected fuel pumps, in particular of each of the parallel-connected high-pressure fuel pumps (2), houses a pressure sensor (21) with the aid of which it is possible to detect at least delivery impulses of the respective fuel pump.