Fuel Pressure Sensor Mount Assembly Integration
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Solution Overview
Problem
Existing fuel pressure sensor installations in internal combustion engines are inefficient due to the absorption of fuel pressure changes within the common rail, leading to decreased accuracy in determining fuel injection timing and quantity, and require multiple sensors, increasing installation complexity in the engine compartment.
Innovation Solution
A fuel pressure sensor/sensor mount assembly is designed with communication paths in a connector unit that exposes fuel pressure sensors to the high-pressure fuel path between the fuel injectors and the accumulator, allowing for more accurate pressure measurement and simplified installation by minimizing the number of parts and steps required within the engine compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fuel pressure sensor is installed in the common rail to measure fuel pressure changes, then the measurement can be obtained, but the fuel pressure changes are absorbed within the common rail resulting in decreased accuracy in determining injection timing and quantity
Solution Approach 1:
The fuel pressure sensor is extracted from the common rail and relocated to the connector unit where it directly measures fuel pressure in the high-pressure fuel path before fuel enters the common rail. This positioning allows measurement of undamped pressure changes that accurately reflect fuel injection events.
Solution Approach 2:
The connector unit serves as an intermediary structure that houses the fuel pressure sensor in a strategic position within the high-pressure fuel path. This intermediary location enables the sensor to capture pressure changes before they are absorbed by the common rail, providing accurate measurement data.
2Measurement precision
If multiple fuel pressure sensors are installed in the engine compartment to achieve accurate measurement, then measurement accuracy is improved, but the number of parts and installation complexity increases
Solution Approach 1:
The fuel pressure sensor is merged with the connector unit that connects fuel pipes to fuel injectors. This integration allows a single sensor to effectively monitor fuel pressure at the critical junction point, eliminating the need for multiple separate sensor installations while maintaining measurement accuracy.
Solution Approach 2:
The connector unit is designed to serve multiple functions: it connects the high-pressure fuel path to fuel injectors and simultaneously houses the fuel pressure sensor. This multi-functionality reduces the total number of components needed in the fuel injection system.
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 solution enhances the accuracy of fuel injection control by directly measuring fuel pressure changes closer to the fuel injectors, reduces the number of sensors needed, and simplifies the installation process by integrating sensors with the connector unit, thus improving workability in the engine compartment.
Implementation Method 1
Each of the fuel pressure sensors is sensitive to a pressure of the fuel in a corresponding one of the communication paths to produce a signal indicative thereof
Data Source
AI summary
A fuel pressure sensor/sensor mount assembly for use in a fuel injection system equipped with fuel injectors which inject fuel, as supplied from an accumulator through fuel pipes, into a multi-cylinder internal combustion engine mounted in an engine compartment of a vehicle. The assembly includes a connector unit and fuel pressure sensors. The connector unit has formed therein a plurality of communication paths each of which is to establish a connection between one of the fuel injectors and the accumulator through one of the fuel pipes. The connector unit also has formed therein sensor mounts exposed to the communication paths. Each of the fuel pressure sensors is disposed in the sensor mount to measure the pressure of the fuel in the communication path. This structure permits steps of installing the fuel pressure sensors within the engine compartment to be decreased and ensures desired measurement accuracy of the fuel pressure sensors.