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

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

Active Publication Date: 2008-12-17
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 making steep slope of vehicle
  • Method for selecting gear during the process of making steep slope of vehicle
  • Method for selecting gear during the process of making steep slope of vehicle

Examples

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Embodiment Construction

[0031] In one embodiment, the wheel is fitted with an internal combustion engine 1 , such as a diesel engine, with a crankshaft 2 coupled to a single-plate dry plate clutch 3 enclosed in a clutch housing 4 . The crankshaft 2 is non-rotatably connected to an input shaft 7 which is rotatably mounted within a housing 8 of a gearbox 9 . A main shaft 10 and an intermediate shaft 11 are also rotatably mounted within the gearbox housing 8 . The gear is rotatably mounted on the input shaft and can be locked on the shaft by means of a synchronizing device provided with a coupling sleeve, the synchronizing device is non-rotatably but axially displaceable mounted on a hub, the shaft is non-rotatable ground to the output shaft. By means of the described coupling sleeve, the gear wheel mounted rotatably on the main shaft can be locked relative to the input shaft 7 . By means of said coupling sleeves in the neutral position, said gears are decoupled from their respective shafts. The gear...

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Abstract

A method for gear selection during driving of a vehicle in a heavy uphill drive condition, said 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 said transmission, rotational speed of said engine, rotational speed of a input shaft and displacement of a throttle control (48) for engine torque request, and for processing said signals in accordance with programmed logic rules to issue command output signals to said engine (1), to said transmission (9) and to said clutch (3).; When sensing a heavy uphill drive condition a target gear is determined for said uphill drive condition, said 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 said target gear will be selected and engaged.

Description

technical field [0001] The invention relates to a method for automatically recognizing the driving situation on a steep slope 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 carrying out said method. Background technique [0003] Automatic mechanical transmission (AMT) type automatic transmissions are becoming more common in heavy-duty vehicles as microcomputer technology continues to advance and makes it possible to precisely control engine speed with a control computer and multiple control elements such as servo motors, The mutual connection and disengagement of the automatic clutch between the engine and the coupling members of the transmission and the transmission makes it possible to always obtain smooth gear changes at the correct relative speeds. Especially when used in heavy vehicles, the advantage of a transmission of the mechanical automatic trans...

Claims

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Application Information

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IPC IPC(8): F16H61/02F16H59/66
CPCF16H59/18F16H59/44F16H59/52F16H59/66F16H61/0213F16H2061/0234F16H2059/663
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
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