On-need AWD systems travel the secondary axle by using an active or passive coupling gadget or "by an independently powered generate system". The common notes that in some instances, the secondary generate method could also provide the primary automobile propulsion. An case in point is a hybrid AWD car or https://groupak.gr/%CE%BA%CE%B1%CF%80%CE%AC%CE%BA%CE%B9%CE%B1-%CE%BA%CE%B1%CF%81%CF%8C%CF%84%CF%83%CE%B1%CF%82/tek-%CF%81%CE%BF%CE%BB%CF%8C-%CE%B1%CE%BB%CE%BF%CF%85%CE%BC%CE%B9%CE%BD%CE%AF%CE%BF%CF%85