Labs at Vehicular systems

Vehicular systems currently has two main laboratories, the Engine lab and the Vehicle Lab.

Vehicle Lab

The Vehicle Lab is in fact a complete building, L-huset (the L-building), which is a new building at LiU, incorporating three laboratories for vehicle related research; The Laboratory for Vehicle Propulsion, The Laboratory for Vehicle Informatics and The Laboratory for Energy Conversion and Energy Storage.

Presentation of L-huset

Engine Lab

Engine testing possibilities

We have two engine test stands suited for testing passenger car engines. Both test stands are equipped with modern asynchronous machines which can act both as a drive and a load to the engines.
These test stands gives us the possibility to run both steady state and dynamic tests, with torque rise-times less than 10 ms. We are able to do road load simulations.
 

Left picture:Test stand 1. Right picture: Test stand 2 with the SVC Engine
 

After a small fire in year 2001 both the old asynchronous machines were replaced whith new ones. The new dynamometers are also asynchronous machines deliverd from Schenck and has a braking capability of 250 kW (~340 hp) and a rated torque of 480 Nm.
 

	Test stand 1 and 2
Type	Schenck Dynas3 LI 250
Power [kW]	250
Maximum Speed [rpm]	10 000
Rated Torque [Nm]	480

Table : Test stands Left picture: Operator room. Right picture: Operator interface
 
 

Measuring capabilities

For measuring purposes we have a data acquisition system consisting of a VXI mainframe and a PC. The VXI mainframe is fitted with a fast 8 channel digitizer + DSP capable of anti-alias protected sampling up to 196 kHz/ch and a slower module more suited for stationary measurement of up to 64 channels of combined voltage, temperature, current and frequency input/outputs. The slower module is also capable of closed loop control. All VXI components are delivered by Hewlett-Packard.
Most of our measurements concern in-cylinder pressure, ion-current, charger/manifold pressure and temperature, engine speed and torque, lambda, turbo charger speed etc.
By connecting the measurement system to the dynamometer and letting the measurement system control the behavior of the dynamometer we do automatic engine mapping and cycle tests.
 

Left picture: Data acquisition system. Right picture: Example of operator interface, to the data acquisition system, for measuring turbo charger related signals

Page responsible: Per Öberg
Last updated: 2012-12-14