The new design features no direct mechanical link between the gas - powered engine and the electric drive train. (scientificamerican.com)
The electro - hydraulic fully variable valve - lift system uses a column of oil in place of the traditional mechanical link between the camshaft and intake valves. (greencarcongress.com)
A version of the Infiniti Q50 sedan, for example, offers so - called steer - by - wire, with no direct mechanical link between the steering wheel and the front wheels. (realtormag.realtor.org)