Bypass System for ATS Temperature and Oxygen Control
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Solution Overview
Problem
Existing vehicular engine systems face challenges in maintaining the optimal chemical and thermal profiles required for efficient operation of After-treatment Systems (ATS), leading to reduced efficiency in pollutant reduction.
Innovation Solution
A vehicular engine system with a bypass system that spills a portion of compressed and cooled airflow to specific modules of the ATS system, optimizing temperature and oxygen levels for enhanced chemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the exhaust flow is used directly from the engine without modification, then the system complexity is low, but the temperature and oxygen levels cannot be maintained within the optimal range for ATS operation
Solution Approach 1:
The exhaust flow is segmented into multiple paths: a primary path through the ATS modules and a secondary path through the bypass line. This allows selective routing of exhaust gas to maintain optimal temperature and oxygen levels in different ATS modules simultaneously, resolving the contradiction between maintaining optimal temperature and keeping system complexity low.
Solution Approach 2:
A bypass line with injection nozzle acts as an intermediary element, introducing fresh air or recirculated exhaust gas into the main exhaust flow. This mediator allows precise control over the chemical and thermal profile of the exhaust flow reaching the ATS modules, enabling optimal operation without excessive system complexity.
2Productivity
If the oxygen content and temperature of exhaust flow are adjusted to optimal ranges, then the efficiency of pollutant reduction is improved, but the device complexity increases due to additional control systems
Solution Approach 1:
The bypass line incorporates adjustable injection nozzles and control valves that dynamically regulate the amount of bypass flow based on operating conditions. This dynamic control enables the system to maintain optimal oxygen and temperature levels across varying engine loads, maximizing pollutant reduction efficiency without requiring overly complex control systems.
Solution Approach 2:
The system changes physical parameters (temperature, oxygen concentration, flow rate) of the exhaust stream by blending bypass flow with main exhaust flow. This parameter adjustment occurs passively through fluid dynamics and controlled mixing, rather than through complex active control systems, thereby improving productivity while limiting complexity increases.
3Reliability
If a bypass system is added to optimize exhaust flow parameters, then the ATS system efficiency is improved, but the device complexity and cost increase
Solution Approach 1:
The bypass line serves multiple functions: it controls temperature, adjusts oxygen levels, and can provide EGR (exhaust gas recirculation) functionality. By making this single structural element multi-functional, the patent improves ATS system reliability and efficiency without proportionally increasing device complexity or cost.
Solution Approach 2:
The bypass system utilizes the engine's own exhaust gas and available air sources to create the optimal exhaust profile, rather than requiring external complex control systems. The system essentially serves itself by using readily available resources within the engine bay to optimize ATS operation, improving reliability while minimizing additional complexity.
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 bypass system improves the efficiency of the ATS system by maintaining optimal temperature and oxygen levels, thereby enhancing pollutant reduction and reducing harmful emissions.
Implementation Method 1
a bypass system (30) configured to spill portion of the compressed airflow downstream to compression means (4)
Implementation Method 2
spilled portion of compressed and cooled airflow from the air charge cooler (5)
Data Source
Figure 1
Figure 2
AI summary
Vehicular engine system (1) for a vehicle comprising an engine (2), an air intake (3), compressor means (4), a charge air cooler (5) and an ATS, after treatment system, system (10; 20), the air intake (3) allowing air to be sucked from the environment by compressor means (4), the charge air cooler (5) being fluidly connected to compressor means (4) to receive the compressed air flow, cool down this latter and fluidly provide the cooled air flow to engine (2) as inlet, the engine (2) providing as outlet an exhaust flow, the exhaust flow being discharge in the environment by passing through the ATS system (20), the ATS system comprising a plurality of operative modules (21, 22, 23, 24) fluidically in series one with respect to the other, and a bypass system (30) configured to spill a portion of the compressed air downstream to air charge cooler (5) and provide this spilled portion to at least one (24) among operative modules (21, 22, 23, 24) in order to optimize the temperature and/or oxygen level of the exhaust flow before entering into such at least one (24) among the operative modules which comprises a first Selective catalyst reducer (SCR 21), a Diesel oxidation catalyst (DOC 22), a Diesel particulate filter (DPF 23) and a second Selective catalyst reducer (SCR 24), wherein said bypass system (30) provides said spilled air flow to said second SCR (24).