Abstract:
A number of variations may include a fluid accumulator comprising, a housing and at least one movable piston wherein the piston separates an interior of the housing into a first chamber constructed and arranged for containing a first fluid, and a second chamber constructed and arranged for containing a second fluid, and wherein the first chamber has an first fluid opening and a first fluid exhaust constructed and arranged to expel excess first fluid from the fluid accumulator and prevent first fluid from entering the second chamber.
Abstract:
A high flow high pressure hydraulic solenoid valve (26) includes a proportional 5 solenoid (56) and a valve body (30) operatively associated with the solenoid (56). The valve body (30) has a valve bore (32) and at least two fluid ports (38, 40) for fluid communication with the valve bore (32), wherein one of the at least two fluid ports (38, 40) includes an undercut (38b, 40b). The high flow high pressure hydraulic solenoid valve (26) also includes a valve member (42) 10 axially and slidingly disposed within the valve bore (32). The valve member (42) has a plurality of valve elements (44) spaced axially along the valve member (42). At least one of the valve elements (44) has a metering face (76a, 76c) acting with the undercut (38b, 40b). The one of the at least two fluid ports (38, 40) has two openings (82) located approximately one hundred eighty (180) degrees from each other in the valve body (30) and the valve member (42) has a control 15 module port (49a) configured to be ninety degrees from the at least one fluid port to balance pressure on the valve member (42) during high flow conditions.
Abstract:
A pressurized oil supply system for a transmission of an automotive vehicle having an engine cut off system is provided that includes an accumulator, a supply line connected with the accumulator, a check valve fluidly connecting the accumulator with the supply line, a solenoid controlled valve fluidly connected with the accumulator, and a discharge line connected with the transmission. A feed line supplying transmission pump pressurized oil is provided. A metering valve connects the feed line with the supply line to regulate the oil pressure delivered to the supply line.
Abstract:
A multi-pressure hydraulic control system (66, 166, 266) for use with a continuously variable automatic transmission (14) of a vehicle powertrain system (10) includes at least one pump (28) having a rotatable pump member (34), at least one inlet region (40) for receiving fluid to be pumped by the pump member (34), and at least one outlet region (42) for outputting fluid pumped by the pump member (34), and a switching valve (78, 178, 278) receiving at least two separate outputs (42) of fluid pumped by the at least one pump (28) for allowing the at least two outputs to be selectively combined and/or separated, the switching valve (78, 178, 278) having a valve member (79, 179, 279) being movable between at least three positions that produces fluid outputs having a first fluid pressure, a second fluid pressure, and a third fluid pressure to one or more portions of the continuously variable automatic transmission (14).
Abstract:
A high flow high pressure hydraulic solenoid valve (26) includes a proportional solenoid (56), a valve body (30) operatively associated with the solenoid (56), the valve body (30) having a valve bore (32) and at least one fluid inlet port (38) for fluid communication with the valve bore (32) and at least one fluid outlet port (40) for fluid communication with the valve bore (32), a valve member (42) axially and slidingly disposed within the valve bore (32), the valve member (42) having a plurality of valve elements (44) spaced axially along the valve member (42), and at least one of the valve elements (44) having a metering face (76a, 76c) adapted to control the pressure of pressurized fluid between the at least one fluid inlet port (38) and the at least one fluid outlet port (40) of the valve body (30) and including a flow force compensating annular void (78a, 78c) to meter out fluid flow from the at least one fluid inlet port (38) to the at least one fluid outlet port (40) to minimize hydraulic, steady state flow forces on the valve member (42) during high-flow conditions.
Abstract:
A solenoid assembly includes a solenoid adapted to be coupled to a solenoid connecting member, with the solenoid connecting member extending from a support member. The solenoid assembly also includes a retaining bracket having a body portion and a securing portion extending from the body portion. The body portion is adapted to be removably coupled to the solenoid connecting member, and the securing portion is removably coupled to the solenoid. The retaining bracket is moveable between an unsecured position, and a secured position. The securing portion of the retaining bracket provides a spring force to the solenoid when the retaining bracket is in the secured position such that the solenoid is biased toward the solenoid connecting member to secure the solenoid between the solenoid connecting member and the securing portion of the retaining bracket.
Abstract:
A forward/reverse planetary gearset (412) may be adapted to employ multi-mode clutch modules (426, 430) in lieu of using only traditional friction clutches (326, 330). Such arrangement may reduce parasitic drag as well as achieve reductions in physical size of the gearset housing (408). Use of multi-mode clutch modules (426, 430) may offer either of or both forward and reverse controls of the planetary gearset (412). Thus, in at least one arrangement a multi-mode clutch (426) may provide forward clutch control while a friction clutch (330) provides reverse clutch control. In another arrangement the friction clutch (326) may provide the forward clutch control, while the multi-mode clutch (430) provides the reverse clutch control for the gearset (412). Finally, both forward and reverse controls of the gearset (412) may be provided via multi-mode clutches (426, 430), thus entirely avoiding use of any friction clutches (326, 330) for forward or reverse control functions of the planetary gearset (412).