Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1998-06-05
2000-02-15
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9011, 25112901, 310 36, F01L 902
Patent
active
060240601
ABSTRACT:
The reciprocating valve actuation and control system includes a poppet valve moveable between a first and second position; a source of pressurized hydraulic fluid; a hydraulic actuator including an actuator piston coupled to the poppet valve and reciprocating between a first and second position responsive to flow of the pressurized hydraulic fluid to the hydraulic actuator; an electrically operated valve controlling flow of the pressurized hydraulic fluid to the actuator; and an engine computer that generates electrical pulses to control the electrically operated valve. The electrically operated valve preferably comprises a three path rotary latched magnetic motor actuating a rotary valve portion having a housing, a rotor, and a stator receiving and supplying hydraulic fluid pressure to the rotor, which alternately directs the hydraulic fluid pressure to the valve cylinder for opening of the valve, or to return to the engine oil sump, for closing the valve. In a presently preferred embodiment, the hydraulic actuator comprises a self-contained cartridge assembly including an actuator piston with dampers for damping motion of the actuator piston, limiting the actuator stroke to assure soft seating of the actuator, and to avoid overshoot during the engine valve opening stroke and the engine valve return stroke. The electro-hydraulic valves are electrically controlled by the engine computer, which generates electrical signals carried to the electro-hydraulic valves. The engine computer typically senses conventional engine variables, and optimizes performance of the valve actuation and control system according to preestablished guidelines, with information being supplied to the engine computer by sensors. The engine computer controls all aspects of engine performance, interfaces with all of the peripheral sensors, and calculates fuel parameters, ignition timing and engine valve timing based upon prior mapping of the engine. In this manner the engine can be controlled so as to provide maximum fuel economy, minimum emissions, maximum engine torque, or a compromise between these parameters.
REFERENCES:
patent: D247717 (1978-04-01), Sturman et al.
patent: D258140 (1981-02-01), Sturman et al.
patent: 2232502 (1941-02-01), Wittmann
patent: 2569800 (1951-10-01), Cataldo
patent: 3989066 (1976-11-01), Sturman et al.
patent: 4107546 (1978-08-01), Sturman et al.
patent: 4108419 (1978-08-01), Sturman et al.
patent: 4114647 (1978-09-01), Sturman et al.
patent: 4227489 (1980-10-01), Regamey
patent: 4232707 (1980-11-01), Sturman et al.
patent: 4270573 (1981-06-01), Sturman et al.
patent: 4409638 (1983-10-01), Sturman et al.
patent: 4501290 (1985-02-01), Sturman et al.
patent: 4516600 (1985-05-01), Sturman et al.
patent: 4541454 (1985-09-01), Sturman et al.
patent: 4544986 (1985-10-01), Buchl
patent: 4614170 (1986-09-01), Pischinger et al.
patent: 4782426 (1988-11-01), DeCamp et al.
patent: 4799582 (1989-01-01), Lequesne
patent: 4811221 (1989-03-01), Sturman et al.
patent: 4857842 (1989-08-01), Sturman et al.
patent: 4930465 (1990-06-01), Wakeman et al.
patent: 4955348 (1990-09-01), Budde et al.
patent: 4974495 (1990-12-01), Richeson, Jr.
patent: 5022565 (1991-06-01), Sturman et al.
patent: 5058857 (1991-10-01), Hudson
patent: 5162710 (1992-11-01), Reinhart et al.
patent: 5190262 (1993-03-01), Woollatt
patent: 5197428 (1993-03-01), Hornby
patent: 5222714 (1993-06-01), Morinigo et al.
patent: 5251659 (1993-10-01), Sturman et al.
patent: 5255641 (1993-10-01), Schechter
patent: 5287829 (1994-02-01), Rose
patent: 5301875 (1994-04-01), Gant et al.
patent: 5304971 (1994-04-01), Sturman et al.
patent: 5335633 (1994-08-01), Thien
patent: 5347961 (1994-09-01), Buehrle, II et al.
patent: 5395012 (1995-03-01), Grill et al.
patent: 5402652 (1995-04-01), Alsenz
patent: 5404844 (1995-04-01), Schechter
patent: 5407131 (1995-04-01), Maley et al.
patent: 5419301 (1995-05-01), Schechter
patent: 5419492 (1995-05-01), Gant et al.
patent: 5445182 (1995-08-01), Sturman et al.
patent: 5456221 (1995-10-01), Schechter
patent: 5456222 (1995-10-01), Schechter
patent: 5456223 (1995-10-01), Miller et al.
patent: 5460329 (1995-10-01), Sturman
patent: 5562070 (1996-10-01), Schechter et al.
patent: 5638781 (1997-06-01), Sturman
patent: 5690064 (1997-11-01), Izuo
patent: 5720242 (1998-02-01), Izuo
patent: 5730091 (1998-03-01), Diehl et al.
SAE Technical Paper Series, No. 960581, International Congress & Exposition, Feb. 26-29, 1996, "Camless Engine", Michael M. Schechter & Michael B. Levin, Ford Research Lab., (3 pages).
Machine Design, Jun. 18, 1998, p. 25, News Off The Wire, Daimler-Benz Research in Germany, Electrohydraulic Valves Replace Camshafts.
Buehrle, II Harry W.
Clark Raymond C.
Gross Jarrid
Long Ron
Nist Lance E.
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