Reduction of vibrations generated by a variable torque in 5-cylinder in-line engines

Despite undoubted advantages of a 5-cylinder in-line engine, its basic drawback is the lack of partial balancing the torque variability generated by gas forces by means of the torque caused by inertia forces. Such a desired phenomenon occurs in 4-cylinder engines. Accordingly, these engines - within a wide range of rotational speed -demonstrate greater engine smoothness than potentially better 5-cylinder engines. In the article, a concept of generating the moment of inertia forces by means of the proper rollers reducing the amplitude of the moment caused by gas forces is presented. Such a solution will allow for a significant mitigation of vibrations of 5-cylinder engines, and they are in many respects better than 4-cylinder ones, which has been justified more extensively in this article. The paper concerns the opportunity of constructing a 5-cylinder engine of the external torque stability equivalent to the torque stability of a 4-cylinder engine. It will allow obtaining a much better unit from the commonly used present 4-cylinder engines for the drive of passenger cars. An engine of the same swept capacity in the 5-cylinder rather than 4-cylinder version will be characterized by numerous advantages, and first and foremost: the space between the front wheels of the vehicle will be optimally used. 4-cylinder engine generates vary large summary forces of the 2nd order, which is manifested by intensive vibrations in the plane axis of the cylinders.