Patent ID: 8677963

Claim:
An electrical camshaft phaser arrangement for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine, comprising: an adjusting gear drive unit formed as a three shafts transmission, comprising: a drive shaft connected with the crankshaft; an output shaft connected with the camshaft; and an adjusting shaft connected with a control shaft of an electrical machine, the electrical machine allowing phasing the camshaft with regards to the crankshaft by increasing or decreasing a control shaft speed, the control shaft being spinning during phase holding modes; wherein the adjusting gear drive unit is configured such that an energy recovering mode is provided wherein a braking torque is applied to the control shaft in order to generate electrical energy, said braking torque being applied to the control shaft during phase holding modes, said braking torque compensating a camshaft friction torque on the control shaft.