Fuel Pump Actuator Energy Control for Noise Reduction
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Solution Overview
Problem
Internal combustion engine fuel delivery devices require high electrical energy to operate quantity control valves efficiently at high speeds, leading to increased noise and reduced fatigue strength at medium and low speeds.
Innovation Solution
The method adjusts the energy supplied to the electromagnetic actuating device based on engine speed, reducing energy during low-speed operations and extending the attraction time to conserve energy, using a pulse duty factor or pre-controlled pulse-width-modulated voltage to manage current and voltage thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high electrical energy is supplied to the electromagnetic actuator during each switching operation, then the switching time is short and reliable switching is achieved, but the operating noise increases and fatigue strength decreases at medium and low speeds
Solution Approach 1:
The patent applies dynamics by making the energy supply to the electromagnetic actuator speed-dependent. At high speeds, high energy is supplied to ensure short switching times and reliable operation. At medium and low speeds, the energy supply is reduced, which decreases operating noise and fatigue while still maintaining reliable switching. This dynamic adaptation of energy supply to operating conditions resolves the contradiction between reliable switching and noise/fatigue reduction.
Solution Approach 2:
The patent changes the parameter of electrical energy supply based on engine speed. By adjusting the energy level according to the operating speed, the system achieves reliable switching at all speeds while minimizing noise and fatigue at lower speeds where high energy is not required for timely switching.
2Productivity
If high electrical energy is supplied to the electromagnetic actuator during each switching operation, then switching time is short, but energy consumption increases at medium and low speeds
Solution Approach 1:
The system dynamically adjusts energy consumption based on engine speed. At high speeds, high energy is supplied to maintain short switching times and high productivity. At medium and low speeds, energy supply is reduced since short switching times are less critical, thereby reducing overall energy consumption while maintaining adequate switching performance.
Solution Approach 2:
The electrical energy parameter is changed according to engine speed. By varying the energy level to match the actual switching requirements at different speeds, the system optimizes the balance between switching speed (productivity) and energy consumption.
3Use of energy by moving object
If the armature attraction time is extended at low speeds to conserve energy, then energy consumption decreases, but switching time increases
Solution Approach 1:
The patent applies dynamics by making the armature attraction time speed-dependent. At high speeds, attraction time is kept short to maintain productivity. At medium and low speeds, attraction time is extended to reduce energy consumption, since the system can tolerate longer switching times at these lower operating conditions. This dynamic adjustment resolves the contradiction between energy consumption and switching time.
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 approach reduces operating noise and increases fatigue strength while ensuring reliable switching of the quantity control valve across varying speeds, optimizing energy use and maintaining correct operation.
Implementation Method 1
an electromagnetic actuator of a metering control valve arranged in an inlet to a delivery chamber of the fuel delivery system is switched to adjust the delivery rate. For this purpose, energy is supplied to the electromagnetic actuator by means of the control signal during each switching operation in which an armature is to be moved towards a stroke stop
Implementation Method 2
An armature coupled to a valve body of the fuel metering valve can be moved by magnetic force
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a method for operating a fuel delivery device (1) of an internal combustion engine, in which method an electromagnetic actuating device (9) of a volume control valve (10) is switched such as to set a delivery volume, wherein an intensity of an energy that is supplied to the electromagnetic actuating device (9) for switching purposes, in particular of a current (I) supplied to the electromagnetic actuating device (9) and/or a level of a voltage applied to the electromagnetic actuating device (9), depends at least intermittently on a rotational speed (72) of the internal combustion engine.