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System for control of a gearbox

一种变速箱、控制单元的技术，应用在传动装置控制、带有齿的元件、皮带/链条/齿轮等方向，能够解决少利驱动状况、校准程序费时间、费用高昂等问题，达到改良操纵灵活性感觉的效果

Inactive Publication Date: 2012-05-30
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shift point calibration procedure is not only time consuming, but also expensive
[0010] Furthermore, the results of the calibration are often unsatisfactory because the calibrated shift points may be favorable for certain driving situations but less favorable for other driving situations

Method used

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  • System for control of a gearbox
  • System for control of a gearbox
  • System for control of a gearbox

Examples

Experimental program
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Embodiment Construction

[0030] As noted above, conventional systems use tabulated shift points. Although these shift points are carefully calibrated by the vehicle manufacturer, driving conditions may vary and these calibrated shift points are not satisfactory in terms of handling flexibility. The full power output of the engine 10 also does not apply these calibrated shift points.

[0031] For example, when the vehicle 1 goes uphill, the state may rise, causing a shift point for an upshift, such as a single-stage acceleration, at a high engine speed where the vehicle 1 cannot accelerate to that engine speed. This situation means that although the motor vehicle 1 can accelerate in the next higher gear and thus reach a higher driving speed in that higher gear, an upshift cannot take place. To prevent this from happening, calibration often includes maintaining the upshift point at a low engine speed to enable an upshift. However, the result of this calibration is that the motor vehicle 1 appears to b...

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PUM

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Abstract

The present invention relates to a system for control of a gearbox, comprising at least one control unit adapted to controlling said gearbox, where said gearbox is installed in a motor vehicle which comprises an engine connected to, in order to drive, said gearbox, which system is adapted to: effecting a first upshift from a first gear to a second gear if the acceleration a for said vehicle is greater than nil for said second gear and the current engine speed is within a first engine speed range,and effecting a second upshift from said first gear to a third gear if the current engine speed is within a second engine speed range, said first speed range being a lower speed range than said second speed range of said engine. The invention relates also to a method, a motor vehicle, a computer programme and a computer programme product thereof.

Description

technical field [0001] The invention relates to a system for controlling a gearbox installed in a motor vehicle. In particular, the invention relates to a system according to the preamble of claim 1 . The invention also relates to a method, a motor vehicle, a computer program and a computer program product thereof. Background technique [0002] figure 1 A partial drive train of a motor vehicle 1 , for example a passenger car or a truck such as a truck or a bus, is schematically depicted. The powertrain includes an engine 10 mechanically connected by a shaft via a clutch device 40 to a first end of a gearbox 20 . The gearbox 20 is also mechanically connected at the other end by a propeller shaft 50 to a differential gear associated with the rear axle. The rear axle includes respective left and right drive shafts 60 which drive the powered wheels (not depicted in view) of the motor vehicle. [0003] With this known arrangement, the mechanical work of the engine 10 is tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/44F16H59/48F16H61/02
CPCF16H61/0213F16H59/48F16H2306/14F16H59/44
Inventor F·斯瓦特林P·阿斯普隆德M·温
Owner SCANIA CV AB
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