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Method for selecting gear during the process of climbing steep slope of vehicle

A technology for gear selection and vehicles, applied to components with teeth, transmission control, belts/chains/gears, etc., can solve the problems of vehicle loss of propulsion, starting, etc., and achieve the effect of low fuel consumption

Active Publication Date: 2012-05-30
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the driven wheels start to slip, the vehicle will lose propulsion and the vehicle will eventually stop in the middle of an uphill and will have serious problems starting

Method used

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  • Method for selecting gear during the process of climbing steep slope of vehicle
  • Method for selecting gear during the process of climbing steep slope of vehicle
  • Method for selecting gear during the process of climbing steep slope of vehicle

Examples

Experimental program
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Embodiment Construction

[0030] In one embodiment, the wheels are equipped with an internal combustion engine 1, such as a diesel engine, with a crankshaft 2 coupled to a single-disk dry-plate clutch 3 enclosed in a clutch housing 4. The crankshaft 2 is non-rotatably connected to the input shaft 7, which is rotatably installed in the housing 8 of the gearbox 9. The main shaft 10 and the intermediate shaft 11 are also rotatably installed in the gearbox housing 8. The gear is rotatably mounted on the input shaft and can be locked on the shaft by means of a synchronization device provided with a coupling sleeve. The synchronization device is mounted on a hub in a non-rotatable but axially movable manner, and the spindle cannot be rotated Ground is connected to the output shaft. With the aid of the coupling sleeve, the gear rotatably mounted on the main shaft can be locked relative to the input shaft 7. With the aid of the coupling sleeve in the intermediate position, the gears are separated from their r...

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PUM

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Abstract

A method for gear selection during driving of a vehicle in a heavy uphill drive condition, the vehicle comprising an engine (1), an automated mechanical transmission (9), a clutch (3), a control unit (45) for receiving input signals including signals indicative of vehicle speed, engaged ratio of the transmission, rotational speed of the engine, rotational speed of a input shaft and displacement of a throttle control (48) for engine torque request, and for processing the signals in accordance with programmed logic rules to issue command output signals to the engine (1), to the transmission (9) and to the clutch (3). When sensing a heavy uphill drive condition a target gear is determined for the uphill drive condition, the target gear being the highest possible gear with lowest possible gear ratio where the vehicle, in view of at least current circumstances, will be at least theoretically able to hold a constant vehicle speed or accelerate at least slightly, and where further selection of downshifts will be adapted so that no lower gear than the target gear will be selected and engaged.

Description

Technical field [0001] The invention relates to a method for automatically identifying driving conditions on steep slopes and selecting a suitable transmission ratio in a heavy vehicle with a mechanical automatic transmission. [0002] The invention also relates to a computer program for performing the method. Background technique [0003] Automatic mechanical transmission (AMT) type automatic transmissions are becoming more and more common in heavy-duty vehicles. This is because of the continuous advancement of microcomputer technology and making it possible to accurately control engine speed by controlling a computer and multiple control elements such as servo motors. The mutual connection and disconnection of the automatic clutches between the engine and the gearbox and the coupling members of the gearbox makes it possible to always obtain a smooth shift at the correct relative speed. Especially when used in heavy vehicles, compared with a conventional automatic transmission ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/66
CPCF16H61/0213F16H59/18F16H59/52F16H2061/0234F16H59/44F16H59/66F16H2059/663
Inventor 安德斯·埃里克森安德斯·林格伦西克斯滕·贝里隆德彼得·滕普林
Owner VOLVO LASTVAGNAR AB