CONTROL APPARATUS FOR VEHICLE AUTOMATIC TRANSMISSION
First Claim
1. A control apparatus for a vehicle automatic transmission, which performs upshift and downshift control for speed gears in accordance with a shift map including upshift and downshift lines set for each of the speed gears, the control apparatus comprising:
- shift mode switching means for executing, in a switching manner, an automatic shift mode of automatically performing a shift operation by determining a speed gear based on a running state of a vehicle, the speed gear being to be set, and a manual shift mode of performing a shift operation instructed by a manual operation of a driver;
downshift determining means for performing a determination as to whether or not to implement an automatic downshift of the speed gear in the manual shift mode;
brake detecting means for detecting an actuation of a brake;
deceleration calculating means for calculating deceleration of the vehicle;
vehicle speed detecting means for detecting a vehicle speed;
running state estimated value calculating means for calculating a running state estimated value obtained by searching a value on a map prepared in advance based on an average value of amounts of accelerator pedal operations by the driver and on an average value of changes of the vehicle speed; and
downshift vehicle speed calculating means for calculating a downshift vehicle speed by searching a vehicle speed on the shift map based on the running state estimated value and on an estimated value of a vehicle gradient,wherein the downshift determining means determines implementation of the downshift in a case where the actuation of the brake is detected by the brake detecting means, in a case where the deceleration of the vehicle, the deceleration being calculated by the deceleration calculating means, is a predetermined value or more, and in a case where a current vehicle speed detected by the vehicle speed detecting means is the downshift vehicle speed or more.
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Accused Products
Abstract
A sport running estimated value LEVELSP obtained by searching a value on a map prepared in advance based on an average values AGYAVE of lateral accelerations GY of a vehicle and on average values of vehicle speed changes is calculated, and a vehicle speed on a shift map is searched based on the sport running estimated value LEVELSP and an estimated value DA of a vehicle gradient, whereby a downshift vehicle speed VA at which a downshift is implemented is calculated. Then, the downshift is implemented in a case where actuation of a brake is detected, deceleration of the vehicle is a predetermined value or more, and a current vehicle speed is a downshift vehicle speed VA or more. In such a way, running on a meandering road, for which the downshift and a subsequent shift hold should be implemented, is sensed appropriately.
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Citations
8 Claims
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1. A control apparatus for a vehicle automatic transmission, which performs upshift and downshift control for speed gears in accordance with a shift map including upshift and downshift lines set for each of the speed gears, the control apparatus comprising:
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shift mode switching means for executing, in a switching manner, an automatic shift mode of automatically performing a shift operation by determining a speed gear based on a running state of a vehicle, the speed gear being to be set, and a manual shift mode of performing a shift operation instructed by a manual operation of a driver; downshift determining means for performing a determination as to whether or not to implement an automatic downshift of the speed gear in the manual shift mode; brake detecting means for detecting an actuation of a brake; deceleration calculating means for calculating deceleration of the vehicle; vehicle speed detecting means for detecting a vehicle speed; running state estimated value calculating means for calculating a running state estimated value obtained by searching a value on a map prepared in advance based on an average value of amounts of accelerator pedal operations by the driver and on an average value of changes of the vehicle speed; and downshift vehicle speed calculating means for calculating a downshift vehicle speed by searching a vehicle speed on the shift map based on the running state estimated value and on an estimated value of a vehicle gradient, wherein the downshift determining means determines implementation of the downshift in a case where the actuation of the brake is detected by the brake detecting means, in a case where the deceleration of the vehicle, the deceleration being calculated by the deceleration calculating means, is a predetermined value or more, and in a case where a current vehicle speed detected by the vehicle speed detecting means is the downshift vehicle speed or more. - View Dependent Claims (3, 4, 7)
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2. A control apparatus for a vehicle automatic transmission, which performs upshift and downshift speed control for speed gears in accordance with a shift map including upshift and downshift lines set for each of the speed gears, the control apparatus comprising:
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shift mode switching means for executing, in a switching manner, an automatic shift mode of automatically performing a shift operation by determining a speed gear based on a running state of a vehicle, the speed gear being to be set, and a manual shift mode of performing a shift operation instructed by a manual operation of a driver; downshift determining means for performing a determination as to whether or not to implement an automatic downshift of the speed gear in the manual shift mode; brake detecting means for detecting an actuation of a brake; deceleration calculating means for calculating deceleration of the vehicle; vehicle speed detecting means for detecting a vehicle speed; running state estimated value calculating means for calculating a running state estimated value obtained by searching a value on a map prepared in advance based on an average value of lateral accelerations of the vehicle and on an average value of changes of the vehicle speed; and downshift vehicle speed calculating means for calculating a downshift vehicle speed by searching a vehicle speed on the shift map based on the running state estimated value and on an estimated value of a vehicle gradient, wherein the downshift determining means determines implementation of the downshift in a case where the actuation of the brake is detected by the brake detecting means, in a case where the deceleration of the vehicle, the deceleration being calculated by the deceleration calculating means, is a predetermined value or more, and in a case where a current vehicle speed detected by the vehicle speed detecting means is the downshift vehicle speed or more. - View Dependent Claims (5, 6, 8)
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Specification