Abstract: The present invention relates to a wheel controller (108) for a vehicle (100), comprising a wheel slip calculation module (212) arranged to calculate a longitudinal wheel slip value for a wheel slip between a surface of the wheel (102) and a road surface thereof; a wheel force estimation module (214) arranged to estimate a longitudinal wheel force value for a wheel force between the surface of the wheel (102) and the road surface; a tire model generator (216) arranged to receive longitudinal wheel slip values from the wheel slip calculation module (212) and longitudinal wheel force values from the wheel force estimation module (214); said tire model generator (216) being configured to generate a model (300, 400) 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 (218) arranged in communication wi

Abstract: The present invention relates to a wheel controller (108) for a vehicle (100), comprising a wheel slip calculation module (212) arranged to calculate a longitudinal wheel slip value for a wheel slip between a surface of the wheel (102) and a road surface thereof; a wheel force estimation module (214) arranged to estimate a longitudinal wheel force value for a wheel force between the surface of the wheel (102) and the road surface; a tire model generator (216) arranged to receive longitudinal wheel slip values from the wheel slip calculation module (212) and longitudinal wheel force values from the wheel force estimation module (214); said tire model generator (216) being configured to generate a model (300, 400) 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 (218) arranged in communication wi

Abstract: 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.

Abstract: A vehicle system includes a compressed air system and a brake assembly. The compressed air system includes an actuating means for actuating a pneumatic-controlled vehicle component and an exhaust outlet adapted to discharge exhaust air from the actuating means. The vehicle system includes a discharge device for discharging air to at least a portion of the brake assembly. A method of improving the braking characteristics of a brake assembly is also provided. Furthermore, the use of exhaust air in order to improve the braking characteristics of a brake assembly is also described.

Abstract: Method and arrangement for providing a compressed air system in a vehicle that includes a connection (6, 10) for delivering compressed air from a compressor (2) to the rest of the compressed air system (1). An oxidation catalytic converter (9) is included that is designed to clean the compressed air and which is located along the connection (6, 10). The connection (6, 10) includes a line (10) that forms a connection between the oxidation catalytic converter (9) and the rest of the compressed air system. The invention also includes a valve (11) that is arranged upstream of the rest of the compressed air system (1) 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 (1), depending on the operating condition of the compressor (2). The invention provides an improved system in which the risk of contaminated air being delivered to the compressed air system is minimized.

Abstract: 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.

Abstract: In a system and a method of stabilizing a vehicle combination of a towing vehicle and a trailer or a semi-trailer, wherein a trailer brake system on the trailer or semi-trailer which may be operated together with the a vehicle brake system on the towing vehicle as well as independent from said vehicle brake system, the system and method includes: detecting at least one signal corresponding to at least one driving condition; computing the detected at least one signal corresponding to said at least one driving condition and comparing the at least one detected signal with a corresponding predetermined values representing a critical driving condition; allowing independent operation of the trailer brake system in response to a detected critical driving condition; and automatically operating the trailer brake system in response to the activation means by applying temporary braking actions on the trailer. Hereby, a proactive stabilising trailer brake system, also known as stretch-braking, is provided.

Abstract: A motor vehicle fitted with a control system for applying braking effect to foundation brakes acting on each wheel of the vehicle, when the braking effect provided by auxiliary brakes, acting on the driven wheels, is lost or significantly reduced is described. Sudden loss of auxiliary brake force can be felt as very bad drivability of the vehicle, a situation that typically occurs in case of low friction between road and tires or if the auxiliary brakes are down controlled to avoid engine stop. By use of a control system, these situations can be avoided. The control system includes a sensor, and a computer for computing and applying the braking effect to the foundation brakes to compensate for the loss of auxiliary braking force. Disclosed is also a method for applying braking effect to the foundation brakes of a motor vehicle.

Abstract: Method and arrangement for controlling or regulating total auxiliary brake torque in a motor vehicle. The device includes at least one first auxiliary brake (4) of a first type and at least one second auxiliary brake (4, 6) of a second type that is different from the first type. The second auxiliary brake (4, 6) can take the form of a retarder (4, 6). A control system (10, 17) is provided for controlling or regulating the auxiliary brake. Information is stored in the control system regarding characteristics of the respective auxiliary brake (4, 6) and at least one predefined limit value for maximally permitted auxiliary brake torque. The control system (10, 17) is designed such that, if the limit value is exceeded or if a request is made for the brake force from the auxiliary brakes (4, 6) to be moderated, then this is done by turning down or moderating, in the first place, the brake torque of the retarder (6).

Abstract: A method and device for evaluating the capacity of a compressor (1) by air being allowed to flow out from a pressure tank (3) through an opening of known geometry. Following a calculation, the quantity of evacuated air is obtained. After this, a compressor (1) pumps back up to the initial pressure in the pressure tank (3). The compressor capacity (1) is established by comparing the time it takes for the compressor (1) to pump back up to the initial pressure in the pressure tank (3) with the time it takes when an acceptable compressor (1) pumps the same quantity of air. By the compressor capacity (1) is here meant the quantity of air which the compressor (1) delivers per unit of time at a given compressor speed and counter-pressure.

Abstract: A compressed air supply system including a compressor (12), a compressed air line (4) that connects an outlet (3) from the said compressor to an inlet (5) to a first active component (6), and an adjustable fan (13) which is controlled by a control unit and is arranged to generate an air flow intended to cool the said compressed air line (4), and a vehicle comprising such a system.

Abstract: The invention relates to an arrangement for a compressed-air system (1) in a vehicle, comprising a connection (6, 10) for feeding compressed air from a compressor (2) to the rest of the compressed-air system. The invention is characterized in that it comprises an oxidation catalyst (9) which is adapted for cleaning the compressed air and which is positioned along said connection (6, 10), said connection (6, 10) comprising a line (10) which is connected between the oxidation catalyst (9) 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.

Abstract: Method and arrangement for providing a compressed air system in a vehicle including a compressor (2) for generating compressed air and a connection (11) for feeding compressed air generated by the compressor (2) to the remaining compressed air system (1) in the vehicle. An oxidation catalyst (10) which is adapted for purifying the generated compressed air in direct connection with an outlet of the compressor (2), and that the oxidation catalyst (10) is connected to the remaining compressed air system (1).