Measure & Control

Visiolution - Optical Combustion Analysis Systems

With the help of optical measuring methods, deep insights into the complex processes of fuel mixture and combustion beyond the findings of the pressure indicating method can be achieved.

AVL Approach

AVL Visiolution technology helps the whole process to be understood in detail and thus provides the right tool for improving performance with regard to fuel consumption, mixture formation, exhaust emissions and engine power.


Benefits at a Glance

  • Measurement in highly transient operation such as cold start / tip-in
  • Best suited for exploring injection strategies
  • Engineering mixture formation and find critical emission cycles
  • Evaluate flame propagation and detect knock limit
  • Detect root causes of irregular combustion / evaluate thermal risk

Technical Data

OPTICAL COMBUSTION ANALYSES: VISIOLUTION TECHLOLOGY

Product Family

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Target investigation

VisioFEM

VisioKnock

VisioScope

Transient operation

VisioFEM
Gasoline

 

 

Mixture preparation

VisioFEM
Gasoline

 

 

Engine transient operation, fuel cut

VisioFEM Temperature

 

 

Temperature load to valve or spark plug

VisioFEM Temperature

 

 

Flame propagation

 

VisioFlame
VisioTomo

 

Premixed / diffusion flame

 

VisioFlame
VisioKnock
VisioTomo

 

Knock center

 

VisioKnock
VisioTomo

 

Irregular combustion

 

VisioKnock

 

Ignition delay, flame propagation, flame temperature distribution, spray development, wall impingement, spray targeting

 

 

VisioScope
Combustion chamber

Air-fuel mixture preparation wall wetting, fuel blow back in intake port, spray development

 

 

VisioScope
port investigation

Mechanical motions, valve train oscillation, investigation on any cyclic moving port, torsional vibration

 

 

VisioScope
port investigation

 


All Products

OPTICAL COMBUSTION ANALYSES: VISIOLUTION TECHLOLOGY

Product Family

Description

Applications

Products

VisioFEM

  • Cycle-precise, cylinder-specific recording of phenomena that contribute significantly to pollutant emissions
  • Detection of critical emission cycles even in transient operation
  • Determining injection strategy for the lowest exhaust emissions
  • Perfect extension to already-existing AVL-indicating systems
  • VisioFEM Gasoline: Transient driving mode – investigation of every single cycle for precisely defined combustion conditions
  • VisioFEM Temperature: Calibration by observing catalyst's load due to its risk during transient operation of the Gasoline engine at short-term high temperature peaks
  • VisioFEM Gasoline
  • VisioFEM Temperature

VisioKnock

  • Special spark plugs or head gaskets equipped with glass fibers allow optical access to the combustion chamber
  • Observation of flame propagation
  • Localization of knock
  • Access to combustion patterns
  • VisioKnock: Knock center detection in standard MPFI or DI gasoline engines
  • VisioFlame: Flame kernel diagnostics to identify the stability of early combustion phase
  • Comprehensive study of flame propagation in standard multi-cylinder gasoline or natural gas engines
  • VisioKnock
  • VisioFlame
  • VisioTomo
  • VisioServices

VisioScope

VisioScope: Carburetion, fuel injection, soot formation and temperature distribution are recorded by endoscope and camera.

  • Visualization of phenomena in port or combustion chamber
  • Direct optical access
  • Enhanced software for evaluation of soot and NOx
  • Stand-alone operation
  • Combustion research
  • Fuel injection development
  • Mixture preparation
  • Mechanical motions
  • VisioScope

VisioService by AVLexpert

  • All above mentioned topics
  • All above mentioned applications
  • All above mentioned products

 


Key Features

Key features

Description

Deep look into combustion process

Optical access to many applications and investigation of specific phenomena!

  • Localization of knocking combustion
  • Mixture formation and flame propagation / kernel motion
  • Irregular combustion analysis
  • Cold start investigation
  • Catalyst protection
  • Temperate evaluation of components in combustion chamber and charger and catalyst
  • Optical access to the combustion chamber with no interference to combustion
  • Cycle-resolved measurement
  • No limits in engine speed and load
  • Transient operation
  • No engine modification necessary
  • Easy sensor installation

Integration into AVL´s Indicating platform

Visiolution technology meets Indicating technology

  • Combustion measurement platform
  • Integration into AVL´s indicating technology
  • Open system architecture
  • Modular concept
  • Combined sensor solution by VisioPressureSensor or VisioPressureSparkPlug
  • Services provided

High technical performance

Development of hardware and software!

  • Sensor in spark plug close to original design
  • Optical Material: Sapphire lenses and Fused Silica Fibers
  • Signal converter: Photo Diode
  • Spectral range: 250 nm to 2100 nm
  • Signal channels: 8 or 16 or 40 or 80 or 160 or customized
  • Signal acquisition:
    crank angle based,
    1 MHz / 16 bit
  • Standard sensor sizes: M12, M14 thread