Sensors for TDC Determination, Valve Timing and Needle Lift Movement - Large Engines
Sensors for TDC Determination, Valve Timing and Needle Lift Movement
AVL Approach
Top Dead Center (TDC) Sensor 428
AVL 426 valve lift sensor
Customer specific needle lift sensor adaptation
Benefits at a Glance
- TDC 428 offers simple installation, is usable for dynamic operation and delivers exact results due to the used horizontal cut principle
- AVL 426 works with the accurate inductive half-bridge principle
- Custom tailored solutions for needle lift adaptation
Technical Data
OTHER SENSORS
Product family ------------ Specifications |
TDC(OT) Sensor |
AVL Valve Lift 426 |
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Crank angle accuracy (428) |
Δϕ ≤ 0.1 deg. CA |
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Engine / charger's speed |
Evaluation recommended |
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Temperature range at sensor: |
0°C…80°C |
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Output pulses |
± 10V |
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Dimensions |
Probe length 260mm, 360mm |
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Sensitivity |
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approx. 6 V / mmm at 3076A01, max. gain |
All Products
OTHER SENSORS
Product Family |
Description |
Applications |
Products |
TDC(OT) Sensor 42 |
The capacitive TDC Sensor 428 is a precise measuring instrument for dynamic TDC determination of motored or non fired cylinders of internal combustion engines. |
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TDC Sensor 428 - match ing the 365 encoder in combination with AVL indicating devices |
Valve Lift |
It allows measurement of the valve lift movement. |
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AVL VL426 |
Needle Lift |
The Nozzle Needle Lift Indicating Sensor enables the customer to measure the movement of the injector nozzle needle in diesel fuel injectors. This allows a precise determination of the beginning, the end, and the duration of the injection pulse. This especially developed sensor is installed within the customer's original injector. |
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Design of custom tailored solutions |
Key Features
Key features |
Description |
TDC(OT) Sensor 428 |
Accuracy
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AVL 426 |
The transducer housing is mounted to the valve cover by means of an adjustment plate. The valve lift movement is transmitted by means of a magnetic core with extension rod. The extension rod is provided with excessive length and may be cut by the user as necessary for the individual application. The extension rod is subsequently brazed to the mounting bolt provided with the transducer which can then be mounted to the valve. |
Needle lift adaption |
The needle lift sensor uses the eddy current principle to measure the movement of the nozzle needle. The eddy current principle is based on the extraction of energy from an oscillating circuit. The change of the impedance is calculated by, the AVL Bridge Amplifier 3010 (incl. Oscillator box 3077), looking at the change of the amplitude and phase position of the magnetic field. |