Title:
【発明の名称】内燃機関用の軽量筒形ピストン
Document Type and Number:
Japanese Patent JPH04502501
Kind Code:
A
Abstract:
PCT No. PCT/DE89/00745 Sec. 371 Date Jun. 24, 1991 Sec. 102(e) Date Jun. 24, 1991 PCT Filed Nov. 29, 1989 PCT Pub. No. WO90/07642 PCT Pub. Date Jul. 12, 1990.A piston having a head with ring grooves, a skirt having hub bores, and a pin, with the following dimensions: L/D=0.45-0.8 H/D=0.25-0.5 A/D=0.3-0.5 T/D=0.45-0.8 where L=maxium length of the piston D=maximum diameter of the piston H=compression height A=maximum skirt height below the bottom ring groove in a peripheral area having the approximate same skirt height of at least 45 degrees on the major thrust face of the piston with approximately symmetrical division of this area on both sides of a plane extending perpendicular to the pin axis and passing through the longitudinal axis of the piston, T=diametrically opposite distance between the hub bore ends located radially on the outside. The skirt bulges along the axis of the piston and has an oval cross-section. An axis of the hub bores is offset slightly towards the major thrust face. The piston includes a horizontal slit, which separates the head from the skirt. In a polar plane perpendicular to the piston axis the skirt has a greater ovality on the minor thrust face. The minor thrust face side of the skirt is structured to bulge less in its upper area, adjacent to the bottom ring groove. The skirt is longer on the major thrust face. The wall thickness is greater on the major thrust face.
Inventors:
Lipberger, Emile
Ellerman, Jürgen
Ellerman, Jürgen
Application Number:
JP50012990A
Publication Date:
May 07, 1992
Filing Date:
November 29, 1989
Export Citation:
Assignee:
Mare Gezel Shaft Mitt Beschlenktel Haftung
International Classes:
F02F3/02; F02F3/04; F16J1/00; F02B1/04; (IPC1-7): F02F3/02; F16J1/00
Domestic Patent References:
| JPS601942B2 | 1985-01-18 | |||
| JPS6332150A | 1988-02-10 | |||
| JP57139649B |
Foreign References:
| IB88008078A |
Attorney, Agent or Firm:
Toshio Yano (2 outside)