Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1989-09-28
1991-10-15
Diehl, Dwight
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74872, 123 9016, B60K 4106
Patent
active
050563785
ABSTRACT:
An engine valve control system for controlling engine valve lift during an automatic transmission shift. A plurality of engine valve actuation systems are each coupled to an individual engine valve for electronically controlling valve lift. Each valve actuation system includes a hydraulically operated piston coupled to each of the engine valves, and an electronically actuated supply valve responsive to a supply signal and coupled between the hydraulically operated piston and a source of hydraulic fluid, and an electronically actuated drain valve responsive to a drain signal and coupled between the piston and source of hydraulic fluid. A controller responsive to a shift command from a transmission controller, provides the supply and drain signals in appropriate timing and phase relationship to reduce valve lift during the automatic transmission shift. In another aspect of the invention, the controller also reduces the hydraulic coupling force applied to the clutch elements during an automatic transmission shift.
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SAE Paper No. 880602, entitled "An Integrated, Full Authority, Electro Hydraulic Engine Valve and Diesel Fuel Injection System", by J. E. Mardell and R. K. Cross, dated Feb. 29-Mar. 4, 1988.
Aimone Michael G.
LoRusso Julian A.
Tobler William E.
Diehl Dwight
Ford Motor Company
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