Volvo Truck Corporation

Volvo Lastvagnar Ab

Renault Trucks

Lionel Farres

Christophe Long

Martin Monnier

Leo Laine

Leon Henderson

Kristoffer Tagesson

Christian Oscarsson

José Vilca

Johanna Majqvist

Jan-Inge Svensson

Fabrice Ranc

Xavier Blanc

Anders Vikström

Fabrice Dussapt

Karthik Ramanan Vaidyanathan

Jean Sebastien Carle

Mattias Holmberg

Jean-Sébastien Tillet

Jean Sébastien Carle

Nicolas Soulier

Olivier Harrang

Khyatee Sethi

Olivier Chapuis

Pierre Saddier

Aime Rezig

An electro-pneumatic brake system for an automotive vehicle, with a service brake arrangement and a park brake arrangement, comprising front and rear axle brake modules, each of front and rear axle brake module comprising an electrical control input and a pneumatic control input, a first bistable relay valve, possibly a second bistable relay valve to supply the trailer, first and second pressure control devices for generating first and second pressure, first and second service brake backup line, for supplying the pneumatic control input of the front and rear axle brake module, a swap arrangement configured to selectively connect the first pressure to the input of the first bistable relay valve or to the first service brake backup line, and connect the second pressure to the input of the second bistable relay valve or to the second service brake backup line.

Heavy duty vehicle redundant braking system

A wheel speed sensor system for a vehicle comprising at least one wheel speed sensor associated with a wheel of the vehicle, the at least one wheel speed sensor comprising first and second wheel speed sensing elements arranged in a single package to generate first and second sensed signals; first and second signal treatment units processing the sensed signals and generating first and second wheel speed signals; a signal combination unit communicatively coupled to the signal treatment units and to first and second electronic control units, to process and combine the wheel speed signals and simultaneously output a combined signal to the electronic control units; and a power management unit independently delivering electrical energy to the wheel speed sensing elements, the power management unit connected to the electronic control units so that the electrical energy is transferred from one or both the electronic control units to the power management unit.

Redundant wheel speed sensor in single package

The present disclosure relates to a pneumatic system for a truck having a first pair of couplers, typically gladhand couplers and a second pair of couplers, typically gladhand couplers, with only one pair used at a time for coupling a trailer, the system being able to detect which pair of glad hands a trailer is connected to. The present disclosure also relates to a truck comprising a pneumatic system according to the invention and a method carried out in a pneumatic system according to the invention.

Automatic selectable trailer connection

The disclosure relates to a pneumatic braking system comprising a service brake actuator; an electro-pneumatic modulator unit for receiving an air control pressure representative of a driver's braking request; delivering, by a regulation unit, a modulated air pressure to a service brake chamber; a parking brake actuator; a parking brake unit for delivering a second air pressure to a parking brake pneumatic chamber; and an isolation device for when the isolation device is electrically energized, preventing the delivery of the air control pressure to the regulation unit, and for when the isolation device is not electrically energized, allowing the delivery of air control pressure to the regulation unit when the second air pressure is higher than a threshold, and preventing the delivery of air control pressure to the regulation unit when the second air pressure is lower than the threshold.

Pneumatic anti-compound on service brake backup line

A control method for controlling a spring loaded brake actuator () comprising a first chamber (Ch) to receive a parking brake pressure (PBR) acting against a main spring (), and a second chamber (Ch) to receive a service brake pressure (SB) for applying a service brake force, the method comprising a circumstantial selection of one control law among a set of control laws comprising two or more compound control laws: —where the first compound control law (CL), known as anti-compound mode, is such the service brake pressure (SB) is electronically controlled such that the resulting total braking force (F) does not exceed a first upper limit (UL) corresponding to the force of the main spring () when the parking brake pressure (PBR) is substantially null, —where the second compound control law (CL), known as controlled-compound mode, is such that the service brake pressure (SB) is electronically controlled such that the resulting total braking force (F) does not exceed a second upper limit (UL) higher than the first upper limit.

Vehicle braking system with compound management function

The invention relates to a steering assembly () for a vehicle (). The steering assembly () comprises a first steering actuator () and a second steering actuator (). The first steering actuator () is adapted to be actuated in accordance with at least one signal issued from a motion control system () to control a steering angle of at least one steerable ground engaging member () of the vehicle () to thereby control the steering of the vehicle (). The first steering actuator () is associated with a first nominal steering capability, defining at least one limitation of at least one of the following: steering angle, steering angle rate and steering torque, for the at least one steerable ground engaging member (). The second steering actuator () is adapted to be actuated in accordance with at least one signal issued from the motion control system () to control the steering angle of the at least one steerable ground engaging member () of the vehicle () to thereby control the steering of the vehicle (). The second steering actuator () is associated with a second nominal steering capability, defining at least one limitation of at least one of the following: steering angle, steering angle rate and steering torque, for the at least one steerable ground engaging member (). The motion control system () is adapted to, upon detection of a malfunction associated with the first steering actuator (), associate the second steering actuator () with a second enhanced steering capability instead of the second nominal steering capability. The second enhanced steering capability is different from the second nominal steering capability.

Steering assembly for a vehicle

An electro-pneumatic brake system for an automotive vehicle comprising brake actuators each with a service brake chamber and a park brake chamber, a service brake system forming a pneumatic main deceleration system and comprising service brake lines configured to supply air pressure to the service brake chamber of the brake actuators, a park brake system forming a pneumatic immobilization system and a backup pneumatic deceleration system, and comprising park brake lines configured to supply air pressure to the park brake chamber of the brake actuators, wherein the park brake system comprises a pressure controller device configured to perform a wheel anti-locking function under a condition of the park brake system being used as a backup deceleration system, the pressure controller device being configured to control the air pressure supply in the park brake lines.

Electro-pneumatic brake system for a vehicle with a park brake system used as a backup deceleration system

The invention concerns an electronic parking brake system (), comprising an air supply (), a check valve (), connected to the air supply, an electro-pneumatic control unit (), at least one park brake actuator (), a relay valve (), comprising a first port () connected to the check valve, a second port () connected to the electro-pneumatic control unit, a third port () connected to the park brake actuator and a fourth port () which is in communication with the atmosphere, and an electrically actuated valve (), which is controlled by the electro-pneumatic control unit () and which includes a first orifice () connected to a compressed air line () extending between the check valve and the air supply, a second orifice (), a third orifice () connected to the electro-pneumatic control unit (), and preferably a vent orifice. The second orifice () is connected to another compressed air line () extending between the check valve () and the first port () of the relay valve ().

By-pass of air supply protection for electronic parking brake system and vehicle comprising such system

A control arrangement for a vehicle motion system including a braking function, comprising motion actuators with one or more brake actuators pertaining to the braking function, a first vehicle motion management controller (VMM) and a second vehicle motion management controller (VMM), forming a redundant assembly to control the braking function, wherein, in riding conditions, the first vehicle motion management controller controls the brake actuators with a current nominal expected braking performance, while the second vehicle motion management controller (VMM) is in a waiting-to-operate mode, the control arrangement comprising a hot swap functionality in which the second vehicle motion management controller (VMM) is configured to take over control of the brake actuators from the first vehicle motion management controller, with the current nominal expected braking performance, in a short time period (SWT) less than one second, preferably less than 0.5 second, preferably less than 0.3 second, and associated control method.

Redundant motion control for a vehicle with a redundant braking arrangement

A method for parking brake adaptable assistance on a vehicle, the vehicle comprising a parking brake and a set of sensors, and at least one electronic control unit controlling the parking brake and the set of sensors, each sensor being monitored by the at least one control unit to measure a specific parameter, and a set of actuators, each actuator being activated by the at least one electronic control unit to engage a specific action or reminder, characterized in that the method comprises a first list () of situations defined by a set of valued parameters measured by the sensors, and a second list () of parking brake actions or reminders, and a list of relations () establishing a relation between each situation of the first list and an action or reminder from the second list and further comprising the following steps: i. determine the values of the parameters measured by the sensors; ii. determine the situation defined by the set of values determined at step i. iii. engage the action or reminder which is in relation with the situation determined at step ii., according to the list of relations ().

Device/method for parking brake assistance

Electronically controlled pneumatic brake system and method for an automotive vehicle, said system comprising a front axle brake module (FBM) for providing pneumatic control pressure to the left and right front pneumatic brake actuators (FW-L, FW-R), one or more rear axle brake module (RBM) for providing pneumatic control pressure to the left and right rear pneumatic brake actuators (RW-L,RW-R), an air production module () selectively providing air under pressure to said front and rear axles electronic brake modules via a first air supply circuit (AC) for the rear axle, a second air supply circuit (AC) for the front axle, first and second air reservoirs (R,R), respectively coupled to first and second air supply circuits, and a third reservoir (R) and a third air supply circuit (AC) connected to the third reservoir (R), for providing a redundant pneumatic supply to the front and rear axle brake modules, the third air supply circuit (AC) providing same braking performance as the first air supply circuit (AC) for the rear axle and same braking performance as the second air supply circuit (AC) for the front axle.

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.

Utilizing a park brake system to improve the deceleration of a vehicle in the event of failure of the service brake system

An electronically controlled pneumatic brake system for a vehicle, with a normal brake operating mode (NOM) and a backup brake operating mode (BKM), said system comprising:

A method of managing the braking force applied on the wheels of a vehicle including hybrid brake actuators is provided. In particular, safety functions, such as ABS and ESP are performed using hybrid actuators.

ABS strategy for hybrid brake actuators

A brake arrangement including hybrid brake actuators includes pneumatic and electric brake actuators, and is designed to overcome pneumatic failures by electrical brake actuators. The pneumatic can thus be lightened and less energy consuming. In particular, only one compressed air tank can be used for all the axles.

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Heyrieux, France

Lionel Farres