Abstract: An air-compressing, direct injection internal combustion engine in which the piston is formed with a combustion chamber in the shape of a solid of revolution and a constricted throat opening, and where mixture formation is predominantly by fuel deposition on the walls of the combustion chamber. The function of the internal combustion engine is proposed to be improved so that, by influencing the squish flow occurring as air in inducted into the combustion chamber, improved performance is obtained, especially in the lower and medium speed ranges of the engine. According to the new proposal, this is essentially achieved by forming the throat opening with an oval cross-section, adopting defined fuel jet directions when injecting the fuel, as well as keeping the location of the fuel discharge point within a defined area.

Abstract: A naturally aspirated eight cylinder internal combustion V-engine in which the cylinders of each bank of cylinders are divided into groups of two cylinders each, and in which the inlet ports of each group pertaining to one and the same cylinder bank are brought together to a joint inlet manifold. Each two cylinders of one and the same group of cylinders have a firing interval which equals or is greater than the opening period of the respective inlet valve pertaining to the respective group of cylinders.