Method and apparatus for controlling an active engine mount

Control system for an active mount device for a displacement-on-demand internal combustion engine, comprising:

• a controller:
• electrically signally connected to at least one engine sensor, and
• configured to generate a first pulse-width-modulated output signal in response to an input from the at least one engine sensor, and,
• an inverter circuit configured to generate a second pulse-width-modulated output signal comprising a logically inverted signal of the first pulse-width-modulated output signal, and
• an electrical bridge circuit:
• having a first leg and a second leg;
• the first leg and second leg connected in parallel and each electrically connecting an operating system electrical potential and an electrical ground;
• the first leg comprising first and fourth switch devices electrically connected in series at a first node, the first node comprising the first output of the electrical bridge circuit, the first switch device coupled to the electrical potential and the fourth switch device coupled to the electrical ground;
• the second leg comprising second and third switch devices electrically connected in series at a second node, the second node comprising the second output of the electrical bridge circuit, the second switch device coupled to the electrical potential and the third switch device coupled to the electrical ground;
• the controller configured to control the first and the third switch devices using the first pulsewidth modulated output signal;
• and
• the inverter circuit configured to control the second and fourth switch devices.

Method for controlling an active mount device with an electrical bridge circuit electrically operably connected to the active mount device, comprising:

• receiving an input signal from a controller;
• generating a first output signal derived from the input signal from the controller;
• communicating the first output signal to a first input and a third input of the electrical bridge circuit;
• generating a second output signal comprising a logically inverted signal of the first output signal;
• and
• communicating the second output signal to a second input and a fourth input of the electrical bridge circuit.