JPH01148153U

JPH01148153U -

Info

Publication number: JPH01148153U
Application number: JP4470988U
Authority: JP
Priority date: 1988-04-04
Filing date: 1988-04-04
Publication date: 1989-10-13

Description

[Brief explanation of the drawing]

第１図は本考案変速制御装置の概念図、第２図
は本考案装置の一実施例を示す車両用パワートレ
ーンの制御システム図、第３図乃至第６図は夫々
同例における変速制御用コンピユータの制御プロ
グラムを示すフローチヤート、第７図ａ，ｂは夫
々１→２変速用ギヤ比設定値の特性図、第８図ａ
，ｂは夫々１→４変速用ギヤ比設定値の特性図、
第９図は自動変速機の変速パターン図、第１０図
は本考案装置による変速動作波形図、第１１図乃
至第１３図は夫々本考案の他の例を示す第３図、
第５図及び第６図に対応した制御プログラムのフ
ローチヤート、第１４図ａ，ｂ及び第１５図は夫
々同例における１→２変速用変速開始設定時間の
特性及び動作波形を示す第７図ａ，ｂ及び第１０
図に対応する図面、第１６図ａ，ｂは車両走行抵
抗に相当するスロツトル開度の特性図である。１…電子制御燃料噴射エンジン、２…自動変速
機、３…デイフアレンシヤルギヤ、４…駆動車輪
、５…エンジン制御用コンピユータ、６…エンジ
ン回転センサ、７…車変センサ、８…スロツトル
センサ、９…吸入空気量センサ、１０…トルクコ
ンバータ、１１…変速歯車機構、１４…変速制御
用コンピユータ、１５…コントロールバルブ、Ａ
，Ｂ…変速制御用シフトソレノイド、１６…ライ
ン圧制御用デユーテイソレノイド、１７…入力回
転センサ、１８…出力回転センサ。 Fig. 1 is a conceptual diagram of the shift control device of the present invention, Fig. 2 is a control system diagram of a vehicle power train showing one embodiment of the device of the present invention, and Figs. 3 to 6 are for shift control in the same example. Flowchart showing the computer control program, Figures 7a and 7b are characteristic diagrams of gear ratio setting values for 1 → 2 shifting, and Figure 8a
, b are characteristic diagrams of gear ratio setting values for 1→4 shifting, respectively;
FIG. 9 is a shift pattern diagram of an automatic transmission, FIG. 10 is a shift operation waveform diagram by the device of the present invention, and FIGS. 11 to 13 are FIG. 3 showing other examples of the present invention, respectively.
Flowcharts of control programs corresponding to FIGS. 5 and 6, and FIGS. 14a and 14b and FIG. 15, respectively, and FIG. 7 showing the characteristics and operation waveforms of the shift start time for 1→2 shifting in the same example. a, b and 10th
16a and 16b are characteristic diagrams of the throttle opening corresponding to the vehicle running resistance. DESCRIPTION OF SYMBOLS 1...Electronically controlled fuel injection engine, 2...Automatic transmission, 3...Differential gear, 4...Drive wheel, 5...Engine control computer, 6...Engine rotation sensor, 7...Vehicle change sensor, 8...Throttle Sensor, 9... Intake air amount sensor, 10... Torque converter, 11... Speed change gear mechanism, 14... Speed change control computer, 15... Control valve, A
, B...Shift solenoid for speed change control, 16...Duty solenoid for line pressure control, 17...Input rotation sensor, 18...Output rotation sensor.

Claims

[Claims for Utility Model Registration] A friction element comprising a transmission gear mechanism connected to an engine via a torque converter, and selectively operating various friction elements of the transmission gear mechanism to determine a predetermined gear position. In the automatic transmission, the upshift is performed at a predetermined time during coasting after an upshift is determined due to the engine transitioning to a power-off state. Throttle opening detection means for detecting the actual throttle opening of the engine; Throttle opening calculation means for calculating the throttle opening of the engine corresponding to the vehicle running resistance from the output rotation speed of the transmission gear mechanism; an engine brake detecting means for detecting the presence or absence of an engine brake; and a coasting traveling determining means for determining that the coasting traveling is being performed when the actual throttle opening becomes equal to or less than the throttle opening equivalent to traveling resistance in a state where there is no engine braking. A shift control device for an automatic transmission, comprising: a shift timing determining means for determining the predetermined timing during the coasting run.