Unlock instant, AI-driven research and patent intelligence for your innovation.

Control apparatus and method for automatic speed changer

A technology of automatic transmission and control device, which is applied in the direction of control device, transmission device, engine control, etc., can solve problems such as impact, and achieve the effect of improving fuel efficiency and prolonging time.

Inactive Publication Date: 2004-06-23
TOYOTA JIDOSHA KK
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in doing so, when the input clutch is disengaged, it will cause a big shock

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control apparatus and method for automatic speed changer
  • Control apparatus and method for automatic speed changer
  • Control apparatus and method for automatic speed changer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In the following description and in the drawings, the invention is described in detail with reference to exemplary embodiments. In the following description, the same components are denoted by the same reference numerals as described without repeating the description.

[0033] Combine below figure 1 A drive train of a vehicle including the control device according to this exemplary embodiment will be described. The control device according to this exemplary embodiment is realized by ECU 1000 shown in the figure. Although the automatic transmission described below is a belt type continuously variable transmission, the present invention is not limited thereto.

[0034] see figure 1 , the drive train of the vehicle includes an engine 100, a (hydraulic) torque converter 200, a forward-reverse conversion device 290, a belt-type continuously variable transmission (CVT) 300, a differential gear (differential) 800, an ECU 1000 and hydraulic control Section 1100.

[0035]...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A control apparatus for an automatic transmission, which executes a neutral control by which an input clutch that transmits driving force from a driving source to the automatic transmission is released when conditions, being i) a shift lever is in a position corresponding to a forward speed range, ii) an accelerator operation is not being performed, iii) a brake operation is being performed, and iv) a vehicle speed is equal to, or less than, a predetermined vehicle speed, are fulfilled, is provided a controller which detects a road gradient and outputs a command to release the input clutch when i) the detected road gradient is equal to, or less than, a predetermined value, and ii) the conditions are fulfilled. After the command has been output, the controller compares the detected road gradient and the predetermined value and cancels the output of the command if the road gradient is greater than the predetermined value. Accordingly, fuel efficiency is able to be further improved during the neutral control.

Description

technical field [0001] The invention relates to the control of the automatic transmission of a vehicle, in particular to a control device and method of the automatic transmission for neutral gear control. Background technique [0002] An automatic transmission to be mounted in a vehicle includes a shift mechanism connected to an engine via a torque converter or the like and having a plurality of power transmission paths. The automatic transmission automatically switches gear ratios (ie, gears) based on, for example, a throttle opening and a vehicle speed. Vehicles with an automatic transmission are generally equipped with a shift lever (gear lever), which is manipulated by the driver to enter any one of various gear positions (eg, reverse gear, neutral gear, forward gear). In the automatic shift mode there is a "forward range" in which the automatic transmission automatically shifts to a predetermined gear ratio / gear. [0003] When a vehicle with this type of automatic tra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16H9/00F16H59/22F16H59/44F16H59/48F16H59/54F16H59/66F16H61/00F16H61/02F16H61/14F16H61/20F16H61/66F16H61/662
CPCF16H61/143B60K2741/225F16H2061/207F16H61/662F16H61/20Y02T10/76B60W10/11F16H59/66F16H2059/663Y10S477/901F16H63/46B60W10/02B60W10/10B60W30/1819
Inventor 儿岛星羽渕良司谷口浩司丰田晋哉
Owner TOYOTA JIDOSHA KK