Haldex Brake Products Ab

Haldex Brake Products Corporation

Haldex Brake Products Aktiebolag

Peter Nilsson

Anders Lindqvist

Ola Nockhammar

Robert David Prescott

Paul Bale

Anders Nilsson

Jacob Svendenius

Ola Nockhammer

The invention relates to an electric brake system () for a vehicle. The electric brake system () comprises electric brake devices (). The electric brake devices () are powered and controlled by redundant capacitor-based power sources (A,B) and redundant control circuits (A,B). The capacitor-based power source (A,B) can be integrated into axle modules (A,B) located close to a vehicle axle (A,B). The capacitor-based power sources (A,B) are recharged by a hub generator, a regeneration power source ().

Electric brake system for a vehicle

A vehicle brake system includes first and second central control units communicating with, respectively, first and second control networks, and a plurality of brake units. Each brake unit includes a brake component, a self-enforcing mechanism associated with and acting upon the brake component, and first and second actuation mechanisms acting upon the self enforcing mechanism, in response to, respectively, first and second actuation control signals, to cause actuation of the brake component. Each brake unit also includes first and second local control units in direct communication with, respectively, the first and second central control units via, respectively, the first and second control networks. The first and second local control units are in communication with, respectively, the first and second actuation mechanisms and transmit, respectively, the first and second actuation control signals to, respectively, the first and second actuation mechanisms, under certain circumstances, to cause actuation of the brake component.

Redundant brake actuators for fail safe brake system

An electronically controlled braking system includes at least one central control unit, the at least one central control unit operable to assign identifiers during an identifier assignment routine, a first distributed electronic control unit, a second distributed electronic control unit and a control network over which the at least one control unit, the first distributed electronic control unit and the second distributed electronic control unit are communicable. The identifiers include a first identifier and a second identifier, one of which is assigned to the first distributed electronic control unit and the other which is assigned to the second distributed electronic control unit at least in part based upon the timing of identification signals generated by the first distributed electronic control unit and the second distributed electronic control unit reaching the central control unit via the control network.

Brake system with distributed electronic control units

A vehicle brake system includes a brake actuator associated with a wheel, the brake actuator having at least one moveable brake component, and a brake control system operative to determine a target rotational velocity of the wheel based at least in part on a relationship between an actual tire/road friction force and a target tire/road friction force, the brake control system determining a target position of the at least one moveable brake component based at least in part upon the target rotational velocity. The brake control system is operable to control actuation of the brake actuator based at least in part upon the target position of the at least one moveable brake component and at least in part based upon a current position of the at least one moveable brake component.

System for control of brake actuator based at least in part upon tire/road friction force

A braking system includes a power supply supplying electrical power, and first and second brake components at least partially operated by electrical power. A first power supply network electrically connects the power supply and the first brake component, and a second power supply network electrically connects the power supply and the second brake component, the power supply networks being adapted to transmit the electrical power from the power supply to the first and second brake components respectively. An auxiliary power supply link is activatable to electrically connect the first power supply network and the second power supply network only when a failure occurs in one of the first power supply network or the second power supply network, the auxiliary power supply link adapted to transmit the electrical power between the first power supply network and the second power supply network only when the failure occurs.

Power supply network for brake system

An electrically controlled braking system includes a control unit and first and second brake components responsive to control signals indicative of demand for braking generated by the control unit. A first control network electrically connects the control unit and the first brake component, and is adapted to transmit the control signals from the control unit to the first brake component. A second control network electrically connects the control unit and the second brake component, and is adapted to transmit the control signals from the control unit to the second brake component. An auxiliary control link electrically connects the first control network and the second control network, the auxiliary control link being adapted to transmit the control signals between the first control network and the second control network when a failure occurs in one of the first control network or the second control network.

Control network for brake system

A vehicle brake system includes a brake actuator, a brake controller operative to control the brake actuator, and at least one position sensor which senses a current position of at least one moveable brake component and provides a current position signal indicative of the current position of the at least one moveable brake component to the brake controller. The brake controller is operative to cause actuation of the brake actuator based at least in part upon a position indicative command received by the brake controller indicative of a commanded position of the at least one moveable brake component and at least in part based upon the current position signal.

System for control of brake actuator

A vehicle brake system includes a brake actuator associated with a tire, the brake actuator having at least one moveable brake component, and a brake control system. The brake control system is operative to determine a target position of the at least one moveable brake component based at least in part upon a relationship between an actual tire/road friction force and a target tire/road friction force, and to control actuation of the brake actuator based at least in part upon the target position of the at least one moveable brake component and at least in part based upon a current position of the at least one moveable brake component. The target tire/road friction force may be determined based at least in part upon a relationship between vertical force acting on the tire, optimal tire slip, slip angle, at least one road dependant parameter, and at least one tire dependant parameter.

Tire slip model

An electrical control network is laid over one or more vehicle dynamics control and/or ride control systems of a heavy vehicle, which control network controls actuation of components thereof. The invention offers many advantages including reduction of components, simplified design, unified communication for numerous different types of system components, simplified resolution of conflicts between competing control strategies, expandability to additional vehicle systems, and flexibility to upgrade for new, improved vehicle control schemes.

Control network for vehicle dynamics and ride control systems having distributed electronic control units

An electrically controlled braking system includes at least one control unit and first and second brake component responsive to control signals generated by the control unit. A first control network electrically connects the control unit and the first brake component, and a second control network electrically connects the control unit and the second brake component. An auxiliary control link is activatable to electrically connect the first brake component and the second brake component when a failure occurs in one of the first control network or the second control network, the auxiliary control link adapted to transmit the control signals between the first brake component and the second brake component when the failure occurs.

A brake system for a heavy vehicle includes a control network, a brake component, a central control unit, and a distributed electronic control unit. The central control unit generates central control signals adapted to control the brake component, which control signals are transmitted to the brake component over the control network. The distributed electronic control unit receives the central control signals, controls the brake component in accordance with the central control signals if the central control signals are received during expected time periods, and controls the brake component in accordance with an alternative control scheme if the central control signals are not received during the expected time periods.

Brake system with distributed electronic control units incorporating failsafe mode

An electronically controlled braking system includes at least one central control unit operable to assign identifiers during an identifier assignment routine, a first distributed electronic control unit, a second distributed electronic control unit and a control network electrically connecting the at least one control unit, the first distributed electronic control unit and the second distributed electronic control unit. The identifiers include a first identifier and a second identifier, with one of the first identifier or the second identifier being assigned to the first distributed electronic control unit and the other of the first identifier or the second identifier being assigned to the second distributed electronic control unit at least in part based upon the timing of a signal reaching, via the control network, the first distributed electronic control unit and the second distributed electronic control unit.

A braking system includes at least one power supply, and first and second brake component each at least partially operated by electrical power. First and second power supply networks electrically connect the power supply with the first brake component and the second brake component respectively. An auxiliary power supply link is activatable to electrically connect the first brake component and the second brake component when a failure occurs in one of the first power supply network or the second power supply network, the auxiliary power supply link adapted to transmit the electrical power between the first brake component and the second brake component when the failure occurs.

Growing community of inventors

Orkelljunga, Sweden

Peter Nilsson