Patent ID: 6446599
Filing Date: 2002-09-10
Classification: F02B,F02D,F02M,Y02T

Abstract:
An internal combustion engine comprising a cylinder body defining a plurality of cylinder bores in which pistons reciprocate, a cylinder head affixed to an end of said cylinder body and defining combustion chambers with said pistons and said cylinder bores, a plurality of air intake passages supplying air charges to said combustion chambers, said air intake passages being spaced generally vertically relative to each other, each one of said air intake passages including a throttle valve arranged to control an amount of the air charge that flows through each one of said air intake passages, an idle air manifold supplying air charges to said combustion chambers, and a feedback control system arranged to control amounts of the air charges that flow through said idle air manifold based upon a difference between a preset idle speed and an actual idle speed of said engine.