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Vehicle controller and control method

一种车辆控制器、车辆控制的技术，应用在传动装置控制、带有齿的元件、皮带/链条/齿轮等方向，达到缩短时间、抑制冲击的效果

Inactive Publication Date: 2010-08-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even when the hydraulic pressure of the engaging element is adjusted so that the turbine rotational speed becomes close to the target value, sometimes the necessary engaging hydraulic pressure of the engaging element cannot be obtained with high accuracy due to fluctuations in engine torque or torque ratio variation.

Method used

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  • Vehicle controller and control method
  • Vehicle controller and control method

Examples

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Comparison scheme
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no. 1 example

[0039] refer to figure 1 , the drive train of the vehicle mounted with the vehicle controller according to the present embodiment will be described. The vehicle controller according to this embodiment is specifically composed of figure 1 The ECU (Electronic Control Unit) 1000 shown is implemented.

[0040] Such as figure 1 As shown, the powertrain of the vehicle includes an engine 100 , an automatic transmission 320 and an ECU 1000 . The automatic transmission 320 includes a torque converter 200 as a fluid coupling and a transmission mechanism 300 formed of a planetary gear device.

[0041] Although the automatic transmission 320 is described as a gear type automatic transmission in the present embodiment, it may be any automatic transmission having friction engagement elements engaged at least when the vehicle is started. For example, a continuously variable automatic transmission having a transmission mechanism that continuously changes a transmission ratio using a belt ...

no. 2 example

[0114] A vehicle controller according to a second embodiment will be described below. The vehicle controller according to the present embodiment differs from the configuration of the above-described vehicle mounted with the vehicle controller according to the first embodiment in the operation of the functional blocks of ECU 1000 . Except for this point, its configuration is the same as that of the vehicle mounted with the vehicle controller according to the first embodiment described above. The same components are denoted by the same reference numerals, and their functions are also the same. Therefore, its detailed description will not be repeated.

[0115] In the present embodiment, ECU 1000 is characterized in that the slope of the turbine rotational speed is set every time there is a transition between a plurality of periods (hereinafter referred to as stages) determined by the degree of progress of return control, and at the set timing The target turbine rotational speed...

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Abstract

The invention relates to a vehicle controller and a control method. When initial control ends (YES at S108), an ECU executes a program that includes the steps of: calculating a return control progression degree (S110); calculating a target amount of change in turbine speed (S112); calculating a feedback gain (S114); calculating a target turbine speed (S116); calculating a deviation between the target turbine speed and turbine speed NT (S118); determining a hydraulic pressure command value (S120); outputting the hydraulic pressure command (S122); and when the turbine speed is synchronized witha first gear synchronization speed (YES at S124), outputting the maximum hydraulic pressure command (S126).

Description

technical field [0001] This invention relates to the control of a vehicle having an automatic transmission, and more particularly to the control of reverting from neutral control. Background technique [0002] When the automatic transmission of the vehicle is set to a forward position and the vehicle is stopped, the driving force of the idling engine is transmitted to the transmission and wheels via the torque converter. As a result, creeping occurs. This creep results in lower mileage when the vehicle is stopped. Therefore, neutral control is performed in a state where the brake pedal is depressed to operate the brakes and the accelerator is substantially fully closed so that the vehicle stops at a forward position in which the transmission is set to nearly neutral while maintaining the forward position status for better mileage. In neutral control, engagement elements that are engaged when the vehicle is started are disengaged to bring the transmission into a near-neutr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/04F16H61/20
CPCF16H2061/0488F16H61/686F16H2061/207F16H2059/385F16H61/20F16H2312/02
Inventor 江藤真吾长谷川善雄
Owner TOYOTA JIDOSHA KK
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