Volvo Truck Corporation

Volvo Lastvagnar Ab

Anders Vikström

Leon Henderson

Lionel Farres

Bincheng Jiang

Mattias Andreasson

Carl-Johan Rundqvist

Nicolas Soulier

A method for automatically verifying a coupling between a tractor and a first trailer unit, the method comprising engaging a wheel brake on the first trailer unit, generating a propulsion torque by the tractor, determining a first coupling force between the tractor and the first trailer unit, and verifying the coupling between the tractor and the first trailer unit based on the determined first coupling force.

Automatic pull tests for articulated vehicles

A method of open loop control of a retardation torque of a vehicle is presented. The method comprises obtaining of a current vehicle acceleration indicator, obtaining of one or more current vehicle state indicators, and determining of an open loop retardation torque based on the vehicle acceleration indicator and the one or more vehicle state indicators. The method further comprises controlling of a resulting retardation torque based on the open loop retardation torque. The resulting retardation torque is applied by one or more propulsion sources of the vehicle.

Vehicle retardation torque control

The invention relates to a method of controlling a heavy-duty vehicle in a slope when the vehicle has come to a standstill due to service brakes of the vehicle having applied a service brake force, the method comprising determining a total brake force required for maintaining the vehicle at standstill, activating at least one park brake for providing a park brake force, gradually increasing the park brake force, and, while the park brake force is gradually increased, gradually reducing the service brake force while maintaining the sum of the service brake force and the park brake force at least equal to the determined total brake force.

Method of controlling a heavy-duty vehicle in a slope

The invention concerns a method for utilizing a park brake system to improve the deceleration of a vehicle in the event of failure of the service brake system, the service brake system comprising a brake pedal () and at least one air supply circuit (), the method including the steps of a) measuring the pressure in the air supply circuit, in particular in an air tank () of the air supply circuit, and b) when the pressure in the air supply circuit falls below a certain value, switching the park brake system from a normal mode, wherein the park brake system is released, to an assistance mode. In the assistance mode, the park brake system assists the service brake system only if the brake pedal () is depressed until reaching a threshold position different from a rest position.

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Gothenburg, Sweden

Anders Vikström