On-demand AWD techniques drive the secondary axle by means of an Lively or passive coupling gadget or "by an independently run generate process". The common notes that in some cases, the secondary generate technique can also present the primary automobile propulsion. An case in point is a hybrid AWD vehicle https://groupak.gr/%CE%B1%CE%BE%CE%B5%CF%83%CE%BF%CF%85%CE%AC%CF%81-4%CF%874