Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

Neutron Radioscopy of a car combustion engine

Johannes Brunner, Burkhard Schillinger

Technische Universität München, Physik E21Universität Heidelberg,

Institute Laue Langevin, NeutrographPaul Scherrer Institut, Neutra

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

Object of investigation:

BMW combustion engine running at 1000 rpm,

driven by a 2kW electric motor

cycle time: 120 ms

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

NR image:

oil dome at the piston bottom

2 mm oil jet for the piston cooling

valves (one in front of the other)

oil traces of the pistonduring up movement

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

detector: ICCD camera PI-Max, Princton Instruments, (Paul Scherrer Institut)

measured at Neutrograph, Institute Laue Langevin

time resolution: 1ms (150 on chip acc)

spatial resolution: 1.8 mm

relative noise: 2%

field of view: 21.5 x 21 cm2 (852 x 833 pixel)

neutron flux: 3·109 n/cm2s

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

an inverse neutron movie follows:

oil movements at the upper position of the piston

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II

a diffence neutron movie follows:

oil movements at the lower position of the piston

Technische Universität MünchenForschungs-Neutronenquelle Garching, ZWE FRM-II