Change visitor typeInnovations & Patents

Worldwide known powerful Swedish innovations and patents

There are a few Swedish inventions and patents that have changed the world in some aspects, varying from wars to public health care. The Rototest True Measurements™ chassis dynamometer was invented in 1985, in the beginning of the age of the microprocessor. From a slow market start the Rototest Dynamometer concept with its unquestionable testing results is today (2011) in the process of becoming an industry standard for testing of Vehicle Powertrain Performance™.


1839-1862
Ericsson - Propellers and the armoured
vessel Monitor






1867
Nobel - The Nobel Prize, dynamite







1892
Johansson - Bahco, Swedish wrench key







1900
Dahlén & von Celsing - AGA, lighthouse







1907
Winquist - SKF, angular contact ball bearings






1943
Kamprad - IKEA, furniture







1950
Rausing - Tetra pak, pre package







1976
Jacobson - Ericsson, AXE telephone switch







1979
Sjostrand - AstraSeneca, Losec







1985
Engstrom & Angstrom - ROTOTEST, The Rototest chassis dynamometer






1991
Generation 1, ROTOTEST APG™, 2WD & 4WD absorption dynamometer (1Q) system. The original patented hub dynamometer. Steady state dynamometer.




1999
Generation 2, ROTOTEST VPA™, 2WD & 4WD absorption dynamometer (1Q) system. Steady state dynamometer.





2003
Generation 3, ROTOTEST VPA-R™, 2WD & 4WD absorption dynamometer (1Q) system. Patented Ultra Fast Hydraulic Valve, UFHV. Dynamic testing (acceleration capabilities). Steady state and Steady rate dynamometer.


2005
Generation 4, ROTOTEST VPA-RX™, 2WD & 4WD absorption dynamometer (1Q) system. Patented Hurricane Cooling Units™, HCU. Patented Natural Torque control system. High power capacity up to 1500 bhp for 2WD.


2008
Generation 5, ROTOTEST Energy™, Regenerative dynamometer (4Q) system. For the first time for a chassis dynamometer, High Resolution Torque, HRT [0.01 Nm]. Full drive-cycle dynamometer.