Control device of automatic transmission for vehicle

A technology of automatic transmission and control device, which is applied in the direction of control device, road vehicle drive control system, transmission device control, etc., can solve the problem that the following speed change control cannot be performed, and achieve the effect of improving the sense of security

Active Publication Date: 2021-10-01
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it has not been possible to perform shift control that automatically and appropriately downshifts the shift gear by reading the driver

Method used

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  • Control device of automatic transmission for vehicle
  • Control device of automatic transmission for vehicle
  • Control device of automatic transmission for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. figure 1 It is a schematic configuration diagram of a vehicle including a shift control device for a vehicle automatic transmission according to an embodiment of the present invention. like figure 1 As shown, the vehicle 1 includes an engine 2 as a driving source, a crankshaft 4 , an automatic transmission (transmission) 6 , an ECU (control unit) 20 , and a hydraulic control device 14 .

[0054]The crankshaft 4 of the engine 2 is connected to the automatic transmission 6 . A torque converter (T / C) 8 provided in the automatic transmission 6 transmits engine torque via automatic transmission fluid (ATF) (hydraulic oil) as a fluid, and has A front cover 8a connected to the crankshaft 4, a pump impeller 8b integrated therewith, a turbine runner 8c arranged to face the pump impeller 8b between the front cover 8a and the pump impeller 8b, and Stator 8d...

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PUM

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Abstract

Provided is a control device of an automatic transmission for a vehicle, which is capable of automatically performing a downshift by appropriately determining a situation in which engine braking is required during downhill travel or the like even if a driver does not perform a downshift operation, and which is capable of improving the release feeling of the driver with respect to the shift control of the automatic transmission. The control device includes a gear change control part which performs upshift gear change control and downshift gear change control of an automatic transmission according to a shift map. When an operation of a brake operation element is detected and full closure of an accelerator is detected, the gear change control part calculates, based on a change amount of a vehicle speed and a pressure of a brake master cylinder, a determination counter value for determining whether or not to execute the downshift of the automatic transmission, and when the determination counter value is equal to or greater than a threshold value (first threshold value), the gear change control part performs the downshift of the automatic transmission.

Description

technical field [0001] The invention relates to a control device for an automatic transmission for vehicles. Background technique [0002] In the transmission control device of an automatic transmission for a vehicle, various shift maps (shift maps) for obtaining the transmission characteristics are usually prepared in advance, and a value indicating running resistance is obtained from the acceleration to determine whether the vehicle is on a flat road or an uphill road. Or downhill, so that any one of the shift maps is selected, and the gear ratio is controlled based on the selected shift map. That is, the expected acceleration set in advance based on the engine output is compared with the actually obtained actual acceleration, the uphill and downhill gradients (road gradients) are judged, and the optimal shift map is selected. Based on the selected shift map, to determine the gear ratio. [0003] When the shift control is performed based on the shift map as described abo...

Claims

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Application Information

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IPC IPC(8): F16H61/02F16H61/21F16H59/44F16H59/54
CPCF16H61/0213F16H61/21F16H59/44F16H59/54F16H2061/0244F16H2061/022F16H2061/0096F16H2061/0237B60Y2300/18108F16H59/48F16H61/04F16H2061/0459B60W2510/18B60W2520/10B60W10/10B60W2540/10B60W2710/1005
Inventor 野口智之笹原和磨村泽宏器久保直之加藤博贵
Owner HONDA MOTOR CO LTD
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