Control device for vehicular drive system
First Claim
1. A control device for a vehicular drive system which is arranged to transmit an output of an engine to a drive wheel of a vehicle and which comprises a switchable type transmission mechanism including (i) a power distributing mechanism switchable between a continuously-variable shifting state in which the power distributing mechanism is operable as an electrically controlled continuously variable transmission, and a step-variable shifting state in which the power distributing mechanism is operable as a step-variable transmission, and (ii) an automatic transmission, said control device comprising:
- a switching controller configured to control said power distributing mechanism selectively in one of said continuously-variable shifting state and said step-variable shifting state, on the basis of a condition of the vehicle;
a shifting controller configured to control a shifting operation of said automatic transmission included in the switchable type transmission mechanism, on the basis of the condition of the vehicle; and
an execution-timing controller configured to control said switching controller to sequentially execute a switching control of said power distributing mechanism and to control said shifting controller to sequentially execute a shifting control of said automatic transmission, so as to prevent an overlap control involving simultaneous execution of both said switching control and said shifting control, when the switching control of the power distributing mechanism and the shifting control of the automatic transmission are judged to overlap each other.
1 Assignment
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Accused Products
Abstract
A vehicular drive system switchable between a continuously-variable and step-variable shifting states, and a control device for controlling the vehicular drive system so as to reduce a shifting shock of an automatic transmission included in the drive system, which takes place due to an overlap control involving a switching control of the drive system and a shifting control of the automatic transmission.
Execution-timing control means 82 is provided to command switching control means 50 and step-variable shifting control means 54 to sequentially execute a switching control by the switching control means to switch transmission mechanism 10 between an electrically established continuously-variable shifting state and a step-variable shifting state, and a shifting control by the step-variable shifting control means to shift an automatic transmission portion 20, even when an overlap control involving the switching control and the shifting control is required, whereby the switching and shifting controls can be rapidly completed. Since the transmission mechanism 10 is not switched during the shifting control of the automatic transmission portion 20, the input speed of the automatic transmission portion 20 will not change due to the switching control, apart from a change of the input speed as a result of the shifting control, making it possible to prevent the complicated shifting control and reduce the consequent shifting shock.
18 Citations
18 Claims
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1. A control device for a vehicular drive system which is arranged to transmit an output of an engine to a drive wheel of a vehicle and which comprises a switchable type transmission mechanism including (i) a power distributing mechanism switchable between a continuously-variable shifting state in which the power distributing mechanism is operable as an electrically controlled continuously variable transmission, and a step-variable shifting state in which the power distributing mechanism is operable as a step-variable transmission, and (ii) an automatic transmission, said control device comprising:
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a switching controller configured to control said power distributing mechanism selectively in one of said continuously-variable shifting state and said step-variable shifting state, on the basis of a condition of the vehicle; a shifting controller configured to control a shifting operation of said automatic transmission included in the switchable type transmission mechanism, on the basis of the condition of the vehicle; and an execution-timing controller configured to control said switching controller to sequentially execute a switching control of said power distributing mechanism and to control said shifting controller to sequentially execute a shifting control of said automatic transmission, so as to prevent an overlap control involving simultaneous execution of both said switching control and said shifting control, when the switching control of the power distributing mechanism and the shifting control of the automatic transmission are judged to overlap each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification