BlowbyMeter_ppt_16_9.jpg

Master the leak

AVL BLOW BY METER™

Blow By Measurement System

The device measures the leak gas which occurs between the gaps from pistons, piston rings and valve guides. It is the high-end solution with a unique performance and can be used in a broad range of applications, from small single cylinder combustion engines to marine diesel aggregates.

EDIT - AVL Blow By Meter

The Challenge

The complexity in engine testing is increasing consequently, by means of testbed equipment, interconnection with automation systems, data management and applications.
  • How to minimize errors which might influence test results?
  • What can be done to fully cover the amplitude of different testing applications?
  • Why are high-end interfaces required along with a minimum of instrumentation?

EDIT- BBY

The AVL Solution

The BLOW BY METER™ is designed for the highest flexibility in operation, automation and service and offers:
  • The widest measurement range on the market for best fit into different engine applications
  • Quick and easy integration with proven and functional architecture.
  • Specifically designed orifice and damper guaranteeing excellent accuracy and reliability.
  • Proven and mature components ensuring a minimum of maintenance effort and reduced testbed downtime.
  • A user interface that is fully embedded into the PUMA automation system to ensure intuitive operation along with quick and easy parametrization.

photoworkers.at -17970015.jpg

The Added Value

AVL, the blow by pioneer with decades of blow by measurement and application competence.

  • Up to 50% reduced set-up time
  • >90% higher accuracy due to specifically designed orifice and damper
  • Up to 85% time saving due to professional on-site calibration
  • Trusted technology based on > 8000 units sold and a market share above 70%

References

More than 8.000 units sold worldwide.

Details

TECHNICAL DATA 

Type

AVL BLOW BY METER 442S

Measurement principle

Orifice Principle

Measurement range

0.2 … 2,400 l/min

Measurement
Uncertainty
Reproducibility

≤ 1.5 % FSO
≤ 1.0 % FSO (with fine linearization)
0.1% of reading

Interfaces

RS232 

Analog out
(+/-10V; 0...20mA)

CAN Bus
Ethernet TCP/IP

Step response time

< 20 ms

Data Rate

Analogue out

CAN Bus

Ethernet

RS232

 

Up to 500 Hz

Up to 500 Hz

10 Hz

Industrial Standard

Voltage Supply 24 VDC

Power Consumption (max)

35W

Ambient Temperature -25°C...55°C

Dimensions (W × H × D)

 

268 × 378 × 107.5 mm

 

 

*) With different sensors 


Measuring Principle

DIFFERENTIAL PRESSURE

For the determination of blow-by flow the orifice measurement principle (differential pressure measurement procedure) is used. A neck (orifice) in the tube cross-section provokes a pressure drop that is measured by means of a differential pressure sensor. The shape of the orifice of the AVL Blow By Meter means that it, on the one hand, ensures the accuracy in both flow directions and, on the other, prevents condensation at the orifice that might modify the cross-section. The selected shape of the orifice allows for a broad dynamic range of 1:50.


Downloads