BRIEF DESCRIPTION OF THE DRAWINGS
The features, advantages thereof, and technical and industrial significance of this invention will be better understood by reading the following detailed description of preferred embodiments of the invention, when considered in connection with the accompanying drawings, in which:
FIG. 1 is a diagram illustrating an overall construction of a hybrid drive device to which first and second embodiments as examples of the invention are applied;
FIG. 2 is an alignment chart illustrating operations of a planetary gear device provided in a first drive source in the hybrid drive device of FIG. 1;
FIG. 3 is an alignment chart illustrating a plurality of speed change steps of an automatic transmission provided between a second motor-generator and an output shaft in the hybrid drive device of FIG. 1;
FIG. 4 is a hydraulic circuit diagram illustrating portions of a hydraulic control circuit that performs a shift control of the automatic transmission shown in FIG. 1;
FIG. 5 is a diagram illustrating an oil pressure characteristic of a first linear solenoid valve shown in FIG. 4;
FIG. 6 is a diagram illustrating an oil pressure characteristic of a second linear solenoid valve shown in FIG. 4;
FIG. 7 is an operation table showing speed change steps of the automatic transmission shown in FIG. 1, and the states of operation of linear solenoid valves and brakes for establishing the speed change steps;
FIG. 8 is a block diagram illustrating various functions of electronic control devices in the hybrid drive device of FIG. 1 on the basis of the first embodiment;
FIG. 9 is a diagram showing an example of a shift chart (map) that is used in the shift control of the automatic transmission performed by a shift control device shown in FIG. 8;
FIG. 10 is a flowchart concretely illustrating an air discharging process performed by a shift line change-to-low vehicle speed side device and the like shown in FIG. 8;
FIG. 11 is a diagram illustrating a control device of the second embodiment, and is a functional block diagram corresponding to FIG. 8 based on the first embodiment;
FIG. 12 is a flowchart concretely illustrating an air discharging process performed by an air discharge device and the like shown in FIG. 11; and
FIG. 13 is a diagram showing an example of a time chart in the case where the air discharging process is performed in accordance with the flowchart of FIG. 12.
Patent Application
20070179004
