초록 ▼

A rotary valve with means for effecting variable timing of intake valve opening, variable opening duration and variable timing of closing in response to changes in each engine cylinder\s appetite for an intake charge is disclosed. Earliest valve opening, longest duration and latest closing occur whe

A rotary valve with means for effecting variable timing of intake valve opening, variable opening duration and variable timing of closing in response to changes in each engine cylinder\s appetite for an intake charge is disclosed. Earliest valve opening, longest duration and latest closing occur when each cylinder\s appetite for an intake charge is largest, while latest opening, shortest duration and earliest closing occur when each cylinder\s appetite for an intake charge is smallest. Intake valve timing can be varied sufficiently to permit use of the theoretical Top Dead Center Opening and Bottom Dead Center Closing for idle, low speed and coasting operating modes to the typical average 20 degrees Before Top Dead Center Opening 50 degrees After Bottom Dead Center Closing for high speed-high load operating mode.

대표청구항 ▼

Engine apparatus for obtaining variable intake valve timing in an internal combustion engine comprising at least one cylinder said apparatus comprising: A. a support member having at least one port communicating with each cylinder and formed with an interior which is at least partially hollow; B. a

Engine apparatus for obtaining variable intake valve timing in an internal combustion engine comprising at least one cylinder said apparatus comprising: A. a support member having at least one port communicating with each cylinder and formed with an interior which is at least partially hollow; B. a rotatable valve member housed within said support member said valve member having means of support for rotation about an axis, and circumferential intake porting means for uncovering said port in said support member for selectively enabling and preventing the flow of intake charge through the valve and its ducting means into the cylinder; C. means for driving said rotatable valve member at a precise angular speed in relation to crankshaft speed; and, D. means mounted for rotation with said rotatable valve member responsive to the difference in the pressure in said rotatable valve member and said cylinder for changing the effective length of said circumferential intake porting means in said rotatable valve said changing of effective length resulting in changing of the timing and duration of effective communication of said circumferential intake port with said support member port during which intake charge flow is permitted.