Mahle International Gmbh

Mahle Technology, Inc.

Valerian Ioja

Michael T Lapp

Steel pistons used in many internal combustion engines are generally composed of a skirt and a crown. The skirt's function is to reduce the lateral and rotational movement of the piston in the cylinder while the engine is in operation. Lateral and rotational frictional forces imparted to a piston during engine operation cause the piston to scrape off the lubricating oil film present on the cylinder wall. The reduced oil film thickness increases piston and cylinder wall wear due to metal to metal contact. The subsequent metal to metal contact produces a phenomenon called scuffing. This disclosure incorporates several design modifications to the piston and results in a significant reduction of the lateral and rotational motion of the piston during engine operation. The reduction of piston motion reduces the amount of oil film removed from the cylinder wall and increases lubrication efficiency. The Increased lubrication efficiency realized reduces frictional wear power loss and scuffing.

Steel piston with fourth land guidance and improved friction characteristics

A two-part piston for an internal combustion engine has a piston head and a piston skirt. The piston head has a piston crown on the underside of which at least two boss lands, each provided with a head boss and a head boss hole are connected. The piston skirt has at least two boss bodies, each provided with a skirt boss and a skirt boss hole. When the head and skirt are joined, the head boss holes and skirt boss holes are flush in relation to each other for accommodating a gudgeon pin. Each boss body has a recess in which the corresponding boss land is accommodated with the associated head boss so that the head boss hole and skirt boss hole are aligned flush relative to each other.

Two-part piston for an internal combustion engine

A two-part piston for an internal combustion engine, comprising a piston head and a piston skirt connected with the piston head in articulated manner, by way of a piston pin. The piston head has a piston crown that is followed by a cylindrical circumference surface having a top land and a ring belt. The piston head can include a ring-shaped circumferential cooling channel disposed within the piston head. The opening of this cooling channel faces the piston skirt, and is closed off with a seal element. There is a seal element that has a first free end that is held between piston head and piston skirt, or rests against an outer wall of the cooling channel. The seal element has a second free end that rests against the piston head, and wherein the seal element has a bottom that lies on a surface of the piston skirt that faces the cooling channel.

Growing community of inventors

Windsor, CA, United States of America

Valerian Ioja