Control apparatus and control method for automatic transmission
First Claim
1. :
- A control apparatus for an automatic transmission, which executes a shift by simultaneously controlling release and application of different friction engaging elements, the control apparatus comprising;
a controller which i) controls a clamping force of a friction engaging element to be released and a clamping force of a friction engaging element to be applied, ii) adjusts an output torque of a prime mover for driving a vehicle, iii) detects a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied, and iv) outputs a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase, wherein the controller outputs a command to reduce the torque of the prime mover for driving the vehicle in response to detection of the predetermined timing, and outputs a command to make the clamping force of the friction engaging element to be released 0 in response to detection of the predetermined timing.
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Accused Products
Abstract
A control apparatus and method for an automatic transmission, by which a shift is executed by simultaneously controlling release and application of different friction engaging elements, are provided which i) control a clamping force of a friction engaging element to be released and a clamping force of a friction engaging element to be applied, ii) adjust an output torque of a prime mover for driving a vehicle, iii) detect a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied, and iv) output a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase. A command is output to reduce the torque of the prime mover in response to detection of the predetermined timing, and a command is output to make the clamping force of the friction engaging element to be released 0 in response to detection of the predetermined timing.
15 Citations
18 Claims
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1. :
- A control apparatus for an automatic transmission, which executes a shift by simultaneously controlling release and application of different friction engaging elements, the control apparatus comprising;
a controller which i) controls a clamping force of a friction engaging element to be released and a clamping force of a friction engaging element to be applied, ii) adjusts an output torque of a prime mover for driving a vehicle, iii) detects a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied, and iv) outputs a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase, wherein the controller outputs a command to reduce the torque of the prime mover for driving the vehicle in response to detection of the predetermined timing, and outputs a command to make the clamping force of the friction engaging element to be released 0 in response to detection of the predetermined timing. - View Dependent Claims (2, 3, 4, 5, 6)
- A control apparatus for an automatic transmission, which executes a shift by simultaneously controlling release and application of different friction engaging elements, the control apparatus comprising;
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7. :
- A control apparatus for an automatic transmission, which executes a shift by simultaneously controlling release and application of different friction engaging elements, the control apparatus comprising;
controlling means for controlling a clamping force of a friction engaging element to be released and a clamping force of a friction engaging element to be applied;
adjusting means for adjusting an output torque of a prime mover for driving a vehicle;
detecting means for detecting a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied; and
instructing means for outputting commands to the controlling means and the adjusting means, the instructing means comprising;
means for outputting a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase;
means for outputting to the adjusting means a command to reduce the torque of the prime mover for driving the vehicle in response to detection of the predetermined timing by the detecting means; and
means for outputting a command to the controlling means to make the clamping force of the friction engaging element to be released 0 in response to detection of the predetermined timing by the detecting means. - View Dependent Claims (8, 9, 10, 11, 12)
- A control apparatus for an automatic transmission, which executes a shift by simultaneously controlling release and application of different friction engaging elements, the control apparatus comprising;
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13. :
- A control method for an automatic transmission by which a shift is executed by simultaneously controlling release and application of different friction engaging elements, the control method comprising the steps of;
controlling a clamping force of a friction engaging element to be released and the clamping force of a friction engaging element to be applied;
adjusting an output torque of a prime mover for driving a vehicle;
detecting a predetermined timing that is after the start of a torque phase during a shift of the automatic transmission and before the clamping force of the friction engaging element to be applied increases to the point at which torque input to the automatic transmission can be transmitted by only the friction engaging element to be applied;
outputting a command to gradually reduce the clamping force of the friction engaging element to be released and a command to gradually increase the clamping force of the friction engaging element to be applied, in the torque phase;
outputting a command to reduce the torque of the prime mover for driving the vehicle in response to detection of the predetermined timing; and
outputting a command to make the clamping force of the friction engaging element to be released 0 in response to detection of the predetermined timing. - View Dependent Claims (14, 15, 16, 17, 18)
- A control method for an automatic transmission by which a shift is executed by simultaneously controlling release and application of different friction engaging elements, the control method comprising the steps of;
Specification