Pressure Control Valve for Diesel Particulate Filter Regeneration
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Solution Overview
Problem
Internal combustion engine exhaust systems, particularly diesel engines, face challenges in maintaining consistent fuel pressure for effective regeneration and thermal management of particulate filters due to pressure fluctuations caused by fuel pumps, leading to unreliable chatter mode operation of injection valves.
Innovation Solution
A pressure control valve is introduced upstream of the injection valve to dampen or eliminate pressure fluctuations, combined with an inlet throttle restriction and stabilizing volume to ensure a stable fuel pressure, allowing for reliable chatter mode operation and efficient fuel delivery for regeneration and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fuel is injected into the exhaust system using an injection valve to regenerate the particulate filter, then the particulate filter regeneration and thermal management are achieved, but pressure fluctuations in the fuel supply system cause unreliable operation of the injection valve
Solution Approach 1:
A pressure control valve is introduced as an intermediary component between the fuel supply system and the injection valve. This pressure control valve actively regulates fuel pressure, damping fluctuations and maintaining stable pressure delivery to the injection valve, thereby ensuring reliable chatter mode operation while preserving the fuel injection regeneration function
Solution Approach 2:
The pressure control valve dynamically adjusts fuel pressure parameters to maintain stability. By modulating the pressure delivery to the injection valve, the system compensates for pressure fluctuations from the fuel pump and other sources, ensuring the injection valve operates reliably within its required pressure range for consistent fuel injection
2Productivity
If the injection valve operates in chatter mode to inject fuel for regeneration, then fuel injection for particulate filter regeneration is achieved, but pressure fluctuations interrupt the chatter mode operation
Solution Approach 1:
The pressure control valve serves as a mediator that isolates the injection valve from pressure fluctuations in the fuel supply system. By stabilizing the pressure input to the injection valve, the pressure control valve ensures the chatter mode operates consistently without interruptions, maintaining reliable fuel injection efficiency for particulate filter regeneration
Solution Approach 2:
The pressure control valve provides beforehand cushioning by proactively damping pressure fluctuations before they reach the injection valve. This preventive approach ensures the injection valve receives consistently stable pressure, preventing chatter mode interruptions and maintaining continuous fuel injection efficiency
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 solution stabilizes fuel pressure, enabling consistent and efficient fuel injection, reducing the likelihood of pressure peaks and ensuring reliable operation of the injection valve, thereby improving the regeneration and thermal management of particulate filters in diesel engine exhaust systems.
Implementation Method 1
at least one pressure control valve, disposed upstream of the injection valve, that damps or eliminates pressure fluctuations
Implementation Method 2
at least one injection valve, operating preferably in the chatter mode as a function of the pressure of supplied fuel, for injecting fuel into the exhaust system
Implementation Method 3
The injected fuel reaches an oxidation catalytic converter, which is located upstream of the particulate filter. The fuel reaching the oxidation catalytic converter leads to an increase in the exhaust gas temperature
Implementation Method 4
The injected fuel reaches an oxidation catalytic converter... leads to an increase in the exhaust gas temperature
Implementation Method 5
The pressure control valve is therefore disposed upstream (with regard to the fuel supplied) of the injection valve... serves to reduce or diminish pressure fluctuations and/or pressure peaks
Data Source
AI summary
The invention relates to a device for the regeneration, temperature loading and/or thermal management of a component, which is assigned to an exhaust gas system, of an internal combustion engine preferably of a vehicle, having at least one injection valve, which operates preferably in a chatter mode as a function of the pressure of supplied fuel, for injecting fuel for the purpose of regeneration, temperature loading and/or thermal management into the exhaust system of the internal combustion engine. The invention is distinguished by at least one pressure control valve which is arranged upstream of the injection valve and dampens or eliminates pressure fluctuations. The invention also relates to a corresponding method.