method for controlling a vehicle

A vehicle and control unit technology, applied in the field of control units and vehicles, computer-readable media, and computer programs, can solve problems such as undesired towing or reversing, and inability to restart, and achieve the effect of ensuring traction

Active Publication Date: 2022-07-08
VOLVO TRUCK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If road traction is limited, restarting may not be possible and towing or reversing may be the only possible options, both of which may be highly undesirable with heavy vehicles (especially trailer-trailer combinations)

Method used

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Examples

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Embodiment Construction

[0032] figure 1 The vehicle 1 in the form of a truck is shown in a partially cut-away side view. More specifically, in this example, the truck is a trailer unit for a semi-trailer. The vehicle 1 has an internal combustion engine 2 in the form of a diesel engine for propelling the vehicle 1 . It should be noted that the invention is equally applicable to vehicles with other types of engines, such as Otto engines. Moreover, the invention is equally applicable to other types of vehicles, such as other types of trucks or buses or cars.

[0033] figure 2 Other components in the vehicle are shown. In addition to the engine 2 , the powertrain of the vehicle also includes a transmission 3 , and a clutch 4 between the engine 2 and the transmission 3 . Transmission 3 is an automatic transmission.

[0034] The vehicle also includes an air suspension system 6 for suspending the vehicle's chassis (not shown) from the vehicle's wheels 5 . The air suspension system comprises at the w...

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PUM

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Abstract

The invention provides a method for controlling a vehicle (1) having an internal combustion engine (2) and a transmission (3) arranged to automatically provide between the engine and at least one drive wheel (5) of the vehicle Shifting between a plurality of gear ratios, characterized by the following steps: - recording (S1, S108) a decrease in demand torque from the vehicle's engine control input (8); - responsive to said demand torque Decrease, the rotational speed of the engine is controlled (S2, S109) to be not lower than a rotational speed threshold higher than the idle speed of the engine, and wherein the rotational speed threshold is determined such that transmission downshifts are avoided.

Description

technical field [0001] The present invention relates to a method for controlling a vehicle having an internal combustion engine and a transmission arranged to automatically provide shifting between a plurality of gear ratios between the engine and at least one drive wheel of the vehicle. The invention also relates to a computer program, a computer-readable medium, a control unit and a vehicle. [0002] The present invention can be applied in heavy vehicles such as trucks, buses and construction equipment. Although the present invention will be described with respect to a truck, the present invention is not limited to this particular vehicle, but may also be used in other vehicles such as cars. Background technique [0003] It is known to adapt the shifting strategy to changing conditions. This is particularly useful for heavy-duty vehicles, where undesired parking in difficult environments can cause problems for the operator of the vehicle. US20110190993 describes the pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W10/06B60W10/11
CPCB60W10/06B60W10/11B60W30/18B60W30/18172B60W2300/12B60W2510/0657B60W2520/26B60W2530/10B60W2540/10B60W2540/103B60W2540/12B60W2540/16B60W2710/0644B60W2710/1005B60W2540/215B60W2552/15B60W10/18B60W30/188B60W2710/10B60W2710/18
Inventor 约翰·拉松安德斯·埃里克松
Owner VOLVO TRUCK CORP
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