Measure & Control

Crank Angle Encoder of 365-Series

Angle Encoders 365C/X/R are highly accurate optical pickups for angle-based indicating measurements and torsional analyses on IC-engines.

AVL Approach

365C for standard mounting at the free crankshaft, 365X for mounting at the shaft between engine and dynamometer and 365R "mass free marker disc" designed for racing applications, small sized engines or engines with limited access to the crank shaft.


Benefits at a Glance

  • Small and compact design for easy handling and minimum influence to crank shaft
  • High resistance against vibration, temperature and electrical interference
  • Only one mark trace with integrated trigger
  • Suitable for racing application
  • The marker disk at 365X is manufactured to customer's specification

Technical Data

CRANK ANGLE ENCODER OF 365-SERIES

Product Family

365C

365X

365R

Engine Speed

Up to 20.000rpm

Up to 28.000rpm

Up to 28.000rpm

Permissible load

500g (overload 1000g)

500g (overload 1000g)

500g (overload 1000g)

Temperature range at mounting surface

-40°C to 100°C

 

 

Output pulses

LVDS, RS422, TTL
Up to 0.025 deg CA

LVDS, RS422, TTL
Up to 0.025 deg CA

LVDS, RS422, TTL
Up to 0.025 deg CA

Dimensions of multiplier / converter

W x H x D (mm)

110 x 35 x 85

110 x 35 x 85

110 x 35 x 85

 


All Products

CRANK ANGLE ENCODER OF 365-SERIES

 Product Family

 Description

 Applications

 Products

365C

 

Well-proven encoder for mounting situation at the end of crank shaft. Robust design with minimum load to the shaft. Operation at high engine speed and load

R&D and application of light / heavy-duty engines
Endurance testing

365C for all AVL indicating devices

365X

 

Encoder for mounting situation at the drive train.
Disc design specific to customers specification 
Encoder design customized

R&D and application for light/heavy-duty, racing, large engines
Endurance testing

365X for all AVL indicating devices

365R

 

No additional load to the shaft as marker trace is laser cut onto shaft or component of shaft „Mass less marker disc"

R&D and application for racing, very small engines and those with limited access to the crank shaft

365R for all AVL indicating devices

 

365C – AVL´s standard solution:
The Angle Encoder 365C is a high precision optical pickup used for angle-based indicating measurements and torsional analyses on internal combustion engines. The Crank Angle Encoder 365C is mounted at the free end of the shaft. The Encoder has proved its worth both on very rough-running single-cylinder research engines and on high-speed racing engines. It tracks every speed change of your engine with utmost precision – and therefore perfectly suitable for dynamic measurements as torsional and vibrational analysis and engine starting tests.

365X – The Individual Customer Solution:
The Angle Encoder 365X ensures precision-assignment of measurement value to degree CA even when mounted on the drivetrain between the engine and the dynamometer. The marker disc is manufactured due to customer's specification. This Angle Encoder works on the "transmission light principle" which makes the system immune to interference from scattered light and therefore increases the signal quality.

365R – mass less marker disc:
There is a particular advantage for the user of the Angle Encoder 365R, no additional marker disk is needed which has to be fitted on the crank shaft. That means the crank shaft is not subject to any additional mass/mass inertia. Only original rotating parts are used and marker trace is applied to this. When it comes to making the mark track on the flange, it is important on the one hand that the trigger mark and angle marks are the correct length to obtain the best light intensity ratio for the trigger threshold. On the other hand, the arrangement of the trigger mark and angle marks in relation to one another also has to be correct to ensure the lowest possible sensitivity to relative motion between the mark track and the optical head.
AVL also provides application support for design and for machining the angle marks to the crank shaft wheel to ensure acceptable signal quality during operation.


Key Features

Key features

Description

Save signal transmission

 

Optical signal transfer

CDM and Trigger signal are transferred via an optical cable of 2m length

  • no mechanical influence of vibrating engine to electronics
  • electrical interference kept away from electronics
  • engine‘s thermal load protected from electronics

Only one marker trace with 720 / 360 signal with integrated Trigger signal slit:

  • life CDM and life Trigger provide save and reliable measurement
  • small encoder size

Different signal types available for many types of signal conditioning

  • LVDS
  • RS422
  • TTL

High mechanical resistance

 

High engine load and speed possible!

Due to its robust design no limit of engine type is given

  • high engine speed 20.000 rpm 365C
  • high engine speed 365X / 365R
  • permissible acceleration 500g (short term 1000g) 365C
  • permissible acceleration 500g disc / 1000g pick-up 365X
  • wide temperature rage -40°C to 100°C

Wide application area

 

No application limit

365 series consists of different encoder types. Therefore almost all engine types can be applied by an 365 encoder.

  • free end of crank shaft
  • Installation between engine and dynamometer possible
  • customized marker disc
  • small engine (e.g. sawing machine, scooter)
  • F1 engine
  • engines with limited space for access to the shaft