Internal-combustion engines – Particular piston and enclosing cylinder construction – Cylinder detail
Patent
1989-08-07
1990-07-17
Cross, E. Rollins
Internal-combustion engines
Particular piston and enclosing cylinder construction
Cylinder detail
123 4183, F02F 300
Patent
active
049414402
ABSTRACT:
Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures of approximately 12,410 kPa (1,800 psi) whereas the desire is to increase such pressures up to the 15,170 kPa (2,200 psi) range. To reach such levels the instant engine has a piston assembly including a steel piston member having an upper cylindrical portion of a diameter D and defining a top surface, a depending tubular wall having a top ring groove a minimal elevational distance TRH below the top surface, and an annular cooling recess located beneath the top surface and juxtaposed to the top ring groove for removing heat away therefrom in use. The piston member is preferably forged and subsequently machined to precisely controllable dimensions, and has a ratio of TRH to D of less than 0.06. Moreover, the piston assembly is preferably of the articulated type and includes a forged aluminum piston skirt connected to the piston member through a common wrist pin. The skirt has an upwardly facing oil trough that is disposed in a cooperating relationship with the cooling recess of the piston member. A midsupported cylinder liner surrounds the piston assembly and a recess is provided thereabout at an elevation aligned with the top ring groove for maximizing cooling.
REFERENCES:
patent: 2296478 (1942-09-01), Morgan
patent: 2308178 (1943-01-01), Kishline
patent: 2407429 (1946-09-01), Kuttner
patent: 3971355 (1976-07-01), Kottmann
patent: 4056044 (1977-11-01), Kamman et al.
patent: 4129108 (1978-12-01), Elsbett et al.
patent: 4180027 (1979-12-01), Taylor
patent: 4207808 (1980-06-01), Elsbett et al.
patent: 4270494 (1981-06-01), Garter et al.
patent: 4286505 (1981-09-01), Amdall
patent: 4377967 (1983-03-01), Pelizzoni
patent: 4577595 (1986-03-01), Deutschmann et al.
patent: 4581983 (1986-04-01), Moebus
patent: 4638769 (1987-01-01), Ballheimer
patent: 4644853 (1987-02-01), Russell et al.
patent: 4662047 (1987-05-01), Berchem
patent: 4704950 (1987-11-01), Ripberger et al.
patent: 4781159 (1988-11-01), Elsbett et al.
patent: 4805518 (1989-02-01), Heban, Jr.
Technical Paper; Mahle Symposium (pp. 3; 77-89) dated May, 1973, by H. G. Braendel.
Technical Paper; Associated Engrg. Group Technical Symposium, Paper No. 7 Title: "Oil Cooled & Electron Beam Welded Pistons for Diesel Engs.", dated 1978, by Dr. R. Monro, et al.
Technical Paper No. 780781; Society of Automotive Engineers, dated Sep. 11-14, 1978, by M. D. Roehrle.
Technical Paper No. 770031; Society of Automotive Engineers, dated Feb. 28-Mar. 4, 1977, by M. D. Roehrle.
Application filed simultaneously herewith by: Bruce C. Cooper et al. for: Engine Piston Assembly and Piston Member Therefor Having a Cooling Recess.
Application filed simultaneously herewith by: B. Ballheimer et al. for: Piston Assembly and Piston Member Thereof Having a Predetermined Compression Height to Diameter Ratio.
Ballheimer Benny
Kamman Kenneth R.
Shoup Stephen G.
Weber Robert L.
Caterpillar Inc.
Cross E. Rollins
Lanchantin, Jr. Charles E.
LandOfFree
Engine including a piston member having a high top ring groove does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Engine including a piston member having a high top ring groove, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine including a piston member having a high top ring groove will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-90159