Volvo Lastvagnar Ab

Ab Volvo

Volvo Truck Corporation

Mats Sabelström

Anders Eriksson

Leo Laine

Leon Henderson

Lena Larsson

Martin Petersson

Lucas Megas

Christian Oscarsson

Ulrich Gobert

Lars Zettergren

Peter Lingman

Bengt Erlano Terborn

Lars Tenglund

Anders Björklund

Sören Bystedt

Lars Bagge

Hans Wallgren

The present invention relates to a wheel controller () for a vehicle (), comprising a wheel slip calculation module () arranged to calculate a longitudinal wheel slip value for a wheel slip between a surface of the wheel () and a road surface thereof; a wheel force estimation module () arranged to estimate a longitudinal wheel force value for a wheel force between the surface of the wheel () and the road surface; a tire model generator () arranged to receive longitudinal wheel slip values from the wheel slip calculation module () and longitudinal wheel force values from the wheel force estimation module (); said tire model generator () being configured to generate a model () representing a relationship between the calculated longitudinal wheel slip and the estimated longitudinal wheel force by using at least three longitudinal wheel force values and three corresponding longitudinal wheel slip values; and a vehicle wheel capability module () arranged in communication with the tire model generator (), said vehicle wheel capability module () being configured to determine an absolute maximum wheel friction level between the surface of the wheel () and the road surface thereof by means of acquiring, for a calculated wheel slip value, a longitudinal wheel force value from the model () of the tire model generator.

Wheel controller for a vehicle

In a method for controlling cooling of an auxiliary brake on a vehicle, the auxiliary brake is cooled by a cooling member. The method comprises the steps of: determining if the vehicle is travelling down a slope or is to be driven down a slope, and activating the cooling member automatically for cooling the auxiliary brake provided that at least one predefined downhill slope condition is determined.

Method for controlling cooling of an auxiliary brake

Method and arrangement for providing a compressed air system in a vehicle that includes a connection () for delivering compressed air from a compressor () to the rest of the compressed air system (). An oxidation catalytic converter () is included that is designed to clean the compressed air and which is located along the connection (). The connection () includes a line () that forms a connection between the oxidation catalytic converter () and the rest of the compressed air system. The invention also includes a valve () that is arranged upstream of the rest of the compressed air system () and that can be adjusted so that in a first position it will allow and in a second position will prevent the delivery of air to the rest of the compressed air system (), depending on the operating condition of the compressor (). The invention provides an improved system in which the risk of contaminated air being delivered to the compressed air system is minimized.

Arrangement and method for compressed air systems in vehicles

A protection device () in a disk brake arrangement for protecting a brake disk () from dirt particles. The protection device at least partly surrounds the brake disk (), and the protection device () includes at least one protection assembly () that is mounted on the wheel suspension () and consists at least partly of a material of which the shape is influenced by heat. The protection assembly has a first end position which prevents dirt particles and relative wind from striking the brake disk directly and a second end position which allows relative wind to strike the brake disk directly so as thus to obtain cooling of the brake disk. The first end position occurs when the temperature of the protection assembly lies below a first temperature and the second end position occurs when the temperature of the protection assembly exceeds a second temperature.

Protection shield for disk brake

Method and arrangement for controlling or regulating total auxiliary brake torque in a motor vehicle. The device includes at least one first auxiliary brake () of a first type and at least one second auxiliary brake () of a second type that is different from the first type. The second auxiliary brake () can take the form of a retarder (). A control system () is provided for controlling or regulating the auxiliary brake. Information is stored in the control system regarding characteristics of the respective auxiliary brake () and at least one predefined limit value for maximally permitted auxiliary brake torque. The control system () is designed such that, if the limit value is exceeded or if a request is made for the brake force from the auxiliary brakes () to be moderated, then this is done by turning down or moderating, in the first place, the brake torque of the retarder ().

Device for controlling or regulating auxiliary brake torque in a motor vehicle

A method and device for evaluating the capacity of a compressor () by air being allowed to flow out from a pressure tank () through an opening of known geometry. Following a calculation, the quantity of evacuated air is obtained. After this, a compressor () pumps back up to the initial pressure in the pressure tank (). The compressor capacity () is established by comparing the time it takes for the compressor () to pump back up to the initial pressure in the pressure tank () with the time it takes when an acceptable compressor () pumps the same quantity of air. By the compressor capacity () is here meant the quantity of air which the compressor () delivers per unit of time at a given compressor speed and counter-pressure.

Method and device for control of the capacity of a compressor

Motor vehicle with an internal combustion engine, a transmission and at least a first and a second brake device. The first brake device acts directly on at least some of the wheels of the vehicle and the second brake device acts on the driving wheels of the vehicle via the transmission and is arranged before the clutch device of the transmission. The first brake device is activated when the second brake device is in an activated state and a shifting operation is started.

Motor vehicle with auxiliary brake and method to control speed change during shifting such a vehicle

A compressed air supply system including a compressor (), a compressed air line () that connects an outlet () from the said compressor to an inlet () to a first active component (), and an adjustable fan () which is controlled by a control unit and is arranged to generate an air flow intended to cool the said compressed air line (), and a vehicle comprising such a system.

System for supply of compressed air and vehicle including a system for supply of compressed air

The invention relates to an arrangement for a compressed-air system () in a vehicle, comprising a connection () for feeding compressed air from a compressor () to the rest of the compressed-air system. The invention is characterized in that it comprises an oxidation catalyst () which is adapted for cleaning the compressed air and which is positioned along said connection (), said connection () comprising a line () which is connected between the oxidation catalyst () and the rest of the compressed-air system. The invention provides an improved arrangement for cleaning compressed air in a compressed-air system for a vehicle.

Air compression arrangement for vehicles

Method and arrangement for providing a compressed air system in a vehicle including a compressor () for generating compressed air and a connection () for feeding compressed air generated by the compressor () to the remaining compressed air system () in the vehicle. An oxidation catalyst () which is adapted for purifying the generated compressed air in direct connection with an outlet of the compressor (), and that the oxidation catalyst () is connected to the remaining compressed air system ().

Growing community of inventors

Billdal, Sweden

Mats Sabelström