Abstract: A hydraulic servo assembly includes a piston slidably disposed within a housing and a pin extending from the piston. The pin is interconnected with a servo link rod of the ETRS system. A port enables inlet of hydraulic fluid to induce movement of the piston and the pin from a first position to a second position to pull the servo link rod thereby shifting the transmission range to the out-of-park position. When in the first position the pin biases a forward-reverse enable (FRE) valve of the ETRS system in a first position. When in the second position a bias force of the pin is relieved from the FRE valve enabling the FRE valve to shift to a second position.

Abstract: A hydraulic servo assembly includes a piston slidably disposed within a housing and a pin extending from the piston. The pin is interconnected with a servo link rod of the ETRS system. A port enables inlet of hydraulic fluid to induce movement of the piston and the pin from a first position to a second position to pull the servo link rod thereby shifting the transmission range to the out-of-park position. When in the first position the pin biases a forward-reverse enable (FRE) valve of the ETRS system in a first position. When in the second position a bias force of the pin is relieved from the FRE valve enabling the FRE valve to shift to a second position.

Abstract: An electro-hydraulic control for a continuously variable transmission includes a first regulator valve which is controlled to provide a high pressure output to control the ratio within the continuously variable transmission and a second regulator valve which is controlled to provide an engagement pressure for torque transmitting mechanisms within the transmission. The control incorporates multiplexing of the valve components, creates prioritization of fluid flow, detection of priority mode of operation, over-pressurization protection valves, and ensures a minimum of fluid flow to the torque transmitting mechanisms and the oil cooler.

Abstract: An electro-hydraulic control mechanism provides controlled engagement pressure for both a torque converter clutch and a shifting torque transmitting mechanism. The control mechanism include a TCC regulator valve that establishes the engagement pressure for the torque converter clutch and a TTM regulator valve that controls the engagement pressure for the torque transmitting mechanisms. An electronically-controlled variable bleed solenoid controls the output pressure level of both of the regulator valves. A control valve is employed to multiplex the output of the regulator valves and to ensure that the torque transmitting mechanism remains engaged during the engagement of the torque converter clutch. The control valve also ensure that the output pressure of the TTM regulator valve is communicated with a manual control valve in the event of an unexpected discontinuance of electrical power.

Abstract: An electro-hydraulic control for a continuously variable transmission includes a first regulator valve which is controlled to provide a high pressure output to control the ratio within the continuously variable transmission and a second regulator valve which is controlled to provide an engagement pressure for torque transmitting mechanisms within the transmission. The control incorporates multiplexing of the valve components, creates prioritization of fluid flow, detection of priority mode of operation, over-pressurization protection valves, and ensures a minimum of fluid flow to the torque transmitting mechanisms and the oil cooler.

Abstract: An electro-hydraulic control mechanism provides controlled engagement pressure for both a torque converter clutch and a shifting torque transmitting mechanism. The control mechanism include a TCC regulator valve that establishes the engagement pressure for the torque converter clutch and a TTM regulator valve that controls the engagement pressure for the torque transmitting mechanisms. An electronically-controlled variable bleed solenoid controls the output pressure level of both of the regulator valves. A control valve is employed to multiplex the output of the regulator valves and to ensure that the torque transmitting mechanism remains engaged during the engagement of the torque converter clutch. The control valve also ensure that the output pressure of the TTM regulator valve is communicated with a manual control valve in the event of an unexpected discontinuance of electrical power.

Abstract: A clutch assembly and charging system combination for use with an automatic transmission includes a clutch assembly having a clutch that is movable between a clutch engaged position and a clutch disengaged position. The clutch assembly further includes a clutch piston that is engageable with the clutch for urging the clutch toward the clutch engaged position, a clutch piston chamber in fluid communication with one side of the clutch piston, and a compensator chamber in fluid communication with an opposite side of the clutch piston. The combination further includes a charging system having a fluid circuit that is in fluid communication with the clutch piston chamber and the compensator chamber. The fluid circuit is configured to receive exhaust oil from the transmission, and to charge the clutch piston chamber and the compensator chamber using the exhaust oil.

Abstract: A clutch assembly and charging system combination for use with an automatic transmission includes a clutch assembly having a clutch that is movable between a clutch engaged position and a clutch disengaged position. The clutch assembly further includes a clutch piston that is engageable with the clutch for urging the clutch toward the clutch engaged position, a clutch piston chamber in fluid communication with one side of the clutch piston, and a compensator chamber in fluid communication with an opposite side of the clutch piston. The combination further includes a charging system having a fluid circuit that is in fluid communication with the clutch piston chamber and the compensator chamber. The fluid circuit is configured to receive exhaust oil from the transmission, and to charge the clutch piston chamber and the compensator chamber using the exhaust oil.