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Control device for automatic transmission

A technology for automatic transmissions and control equipment, applied in transmission control, mechanical equipment, vehicle gearboxes, etc., to achieve the effect of suppressing the impact of engagement and the impact of shifting gears

Inactive Publication Date: 2009-10-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, because the bulletin only focuses on the identification of the two regions of the driving region and the coasting region, there is a change in the shift shock

Method used

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  • Control device for automatic transmission
  • Control device for automatic transmission
  • Control device for automatic transmission

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] The following will refer to figure 1 A vehicle equipped with an automatic transmission control apparatus according to an embodiment of the present invention will be described. The vehicle is an FF (Front Engine Front Drive) vehicle. It should be noted that the vehicle carrying the automatic transmission control apparatus according to the present embodiment may be a type of vehicle other than FF.

[0027] The vehicle includes an engine 1000, a transmission 2000, a planetary gear unit 3000 constituting a part of the transmission 2000, an oil pressure circuit 4000 constituting a part of the transmission 2000, a differential gear 5000, a drive shaft 6000, front wheels 7000, and an ECU (Electronic Control Unit )8000.

[0028] Engine 1000 is an internal combustion engine that burns a mixture of fuel and air injected from injectors (not shown) in combustion chambers of cylinders. Combustion pushes down the piston in the cylinder to turn the crankshaft. It should be noted t...

no. 2 example

[0061] Next, a second embodiment of the present invention will be described. In this embodiment, clutch-to-clutch (from image 3 4th gear down to 3rd gear shown in ) the waiting time from the determination of the disengagement side friction engagement element to the determination of the engagement side friction engagement element. It should be noted that the Figure 1 to Figure 3 It is also the same in this embodiment. Therefore, a detailed description thereof will not be repeated.

[0062] The following will refer to Figure 6A map stored in the memory of ECU 8000 serving as the control device according to the present embodiment will be described.

[0063] exist Figure 6 in, as above Figure 4 In the same way, the horizontal axis represents the slip amount N(SLP) of the torque converter. Figure 6 The vertical axis in represents the waiting time from disengagement to engagement.

[0064] Such as Figure 6 As shown, the larger the slip amount N(SLP) of the torque con...

no. 3 example

[0071] Next, a third embodiment of the present invention will be described. In the present embodiment, the coast down shift line is modified according to the slip amount N(SLP) of the torque converter. More specifically, the output shaft speed of the automatic transmission defining a coast down shift line is varied. Note that the same as explained in the second embodiment before, the Figure 1 to Figure 3 It is the same in this embodiment. Therefore, its detailed description will not be repeated here.

[0072] The following will refer to Figure 8 A map stored in the memory of ECU 8000 serving as the control device according to the present embodiment will be described.

[0073] Such as Figure 8 As shown, the map defines the output shaft speed NOUT of the automatic transmission for each range of slip amount N(SLP) of the torque converter, at which output shaft speed NOUT is reached, a coast downshift is determined.

[0074] Such as Figure 8 As shown, the smaller the sl...

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Abstract

The invention provides a control device for automatic transmission. An ECU executes a program including the steps of: detecting an engine speed NE (S100); detecting a turbine speed NT (S 110); calculating a slip revolution speed N(SLP) of a torque converter as (NE-NT) (S 120); calculating a hydraulic pressure control value based on the slip revolution speed N(SLP) and a map (S330); and outputtinga hydraulic pressure control signal to a linear solenoid (S 340). The map is set such that the hydraulic pressure control value is smaller as the slip revolution speed N(SLP) increases in positive values.

Description

[0001] This application is a divisional application of the patent application No. 200680006440.1 with the filing date of March 1, 2006 and the title of the invention being "Control Equipment for Automatic Transmission". technical field [0002] The present invention relates to a control device of an automatic transmission, more particularly to a control device that suppresses the occurrence of shift shock during coastdown gear shift (coastdown gear shift) so as to achieve good shift characteristics. Background technique [0003] An automatic transmission that includes a solenoid valve and adjusts variables related to a shift operation such as a gear position, a hydraulic pressure level, a time constant or timing of a shift operation, etc., by means of an ECU (Electronic Control Unit) by receiving an electric signal from the outside has been put into practical use. . This ECU enables the operation state of the automatic transmission to be shifted to various states reliably an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/04
CPCF16H59/42F16H2200/2007F16H61/686F16H2059/467F16H2200/0052F16H2061/0496F16H59/40F16H2059/366F16H61/061F16H61/08Y02T10/60F16H61/04
Inventor 中村和明木村弘道大岛康嗣浅见友弘近藤贵裕
Owner TOYOTA JIDOSHA KK
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