Alfonso S Escobosa

57379947, Apr 14, 1998

Nov 27, 1996

8/757854

Alfonso S. Escobosa - Placentia CA

F15B 1316
F15B 13044

91361

This invention pertains to a hydrostatic actuation system based on a digitally commutated, piston pump. Typically the pump is a fixed displacement axial piston pump with the hydromechanical commutator (which consists of either check valves or a rotated portplate) replaced by electromagnetically activated switches. The activation of the switches coincides with the extreme position of the pistons. The actual switching events are selected by a digital controller to effect an incremental flow rate to a hydraulic actuator. The flow rate consists of minute volumes of fluid displaced at a frequency and polarity dependent on the magnitude and sign of the rate binary applied to the controller.

60267712, Feb 22, 2000

May 24, 1999

9/317601

Alfonso S. Escobosa - Placentia CA

F01L 902

123 9012

This invention pertains to a variable actuation system for engine valves. It is based on the natural oscillatory motion of two, hydrostatically coupled masses. One mass consists of an engine valve having a piston at the tip of its stem, the other mass consists of a spring-sprung master piston that is electromagnet-controlled at each end of travel. Separate half cycles of essentially sinusoidal motion of the couples masses are initiated and terminated by alternately releasing and capturing the spring driven master piston at its peak amplitudes which corresponds to the open and closed positions of the valve.

45907641, May 27, 1986

Jan 22, 1985

6/693531

Alfonso S. Escobosa - Placentia CA

F15B 903

60390

This disclosure pertains to a completely digital, electrically powered servo wherein the servo actuator is minutely incremented at a frequency proportional to the magnitude of an error binary number. The binary error is derived from the difference of a binary reference representing the commanded position of the actuator and a binary feedback representing the position of the actuator. The direction of each increment has the polarity which reduces the difference between the reference and feedback binary numbers. The power unit of the servo is electrohydraulic; however, the servo is entirely electrically controlled and powered. Hydraulic fluid is confined to the power unit where it serves as a link between two solenoid driven piston pumps, a common mode volume adjuster and a hydraulic actuator. The direction the actuator is incremented is dependent on which of the two solenoids the error polarity directs pulsed electrical power.

42969115, Oct 27, 1981

Feb 7, 1979

6/010001

Alfonso S. Escobosa - Placentia CA

F16V 31122
F01L 134
F01L 902

251 57

This invention relates to hydraulic control of intake valves and fuel injection of spark ignited internal combustion engines to effect a sonic-type induction system. The invention is an extension of a previous application by the same inventor, which provides a hydraulic actuation system for a prescribed valve opening of all the engine valves. The new system, in substance, provides a means to divert, in varying amounts, actuation fluid as supplied by the former system so as to impart a variable lift to the intake valves and, proportionally, to the fuel injection metering valve(s). The result is an induction system capable of maintaining an accurate air-to-fuel mass ratio.

42445531, Jan 13, 1981

May 25, 1978

5/909650

Alfonso S. Escobosa - Placentia CA

F16K 31122
F01L 902

251 57

This invention relates to an hydraulic actuation system for poppet valves of internal combustion engines. In substance, the system replaces the valve guide and spring assemblies of conventional mechanisms with miniature hydraulic actuators wherein the valve stem now serves as the actuator shaft and the valve guide as the actuator body. The valve actuators are remotely driven in push-pull fashion by fluid supplied by complementary cam followers. As such, interconnecting hydraulic lines replace the push rods and rocker arms of conventional valve driven mechanisms.