Patent ID: 8955661
Filing Date: 2015-02-17
Classification: B60K,B60W,F16D,F16H,Y02T

Abstract:
1. A control system for controlling a hybrid drive unit of a vehicle, the control system comprising: a pressure regulator valve in fluid communication with a plurality of fluid lines and configured for regulating a line pressure of a fluid within the plurality of fluid lines; a first valve in fluid communication with at least one of the plurality of fluid lines and configured for opening and closing fluid communication between the plurality of fluid lines and a first clutch; and a second valve in fluid communication with at least one of the plurality of fluid lines and configured for opening and closing fluid communication between the plurality of fluid lines and a second clutch; wherein the first valve closes fluid communication between the plurality of fluid lines and the first clutch to disengage the first clutch and the second valve closes fluid communication between the plurality of fluid lines and the second clutch to disengage the second clutch to operate the hybrid drive unit in a first mode, the first valve opens fluid communication between the plurality of fluid lines and the first clutch to engage the first clutch and the second valve closes fluid communication between the plurality of fluid lines and the second clutch to disengage the second clutch to operate the hybrid drive unit in a second mode, the first valve opens fluid communication between the plurality of fluid lines and the first clutch to engage the first clutch and the second valve opens fluid communication between the plurality of fluid lines and the second clutch to engage the second clutch to operate the hybrid drive unit in a third mode, and the first valve closes fluid communication between the plurality of fluid lines and the first clutch to disengage the first clutch and the second valve opens fluid communication between the plurality of fluid lines and the second clutch to engage the second clutch to operate the hybrid drive unit in a fourth mode; and wherein the first valve and the second valve each include a shift valve characterized by a lack of a regulated pressure feedback port.