Vehicle with multiple engines coupled to a transmission via a jackshaft

1) A motor vehicle having a chassis elongated upon a center axis between paired front and paired rear wheels, and a power train comprised of:

• a) primary and auxiliary internal combustion engines located one in front of the other adjacent said front wheels, each engine having a power output shaft extending in parallel juxtaposition with said center axis and both having the same direction of rotary motion,
• b) releasible coupling and power transfer means associated with each output shaft,
• c) a speed change transmission positioned rearwardly of said engines and having an input shaft, and
• d) a jackshaft laterally spaced from said engines in parallel relationship to said center axis, and rotatably secured by said chassis to selectively receive and accumulate power from said engine output shafts and convey said accumulated power to the input shaft of said speed change transmission, whereby
• e) economy of operation is achieved by deactivating one engine when lesser power is needed for propulsion of the vehicle.