Vehicle braking system
AssigneeHaldex Brake Products AB
InventorsDudley John Harrison, Carl Mellings, Mark Pieczko, Neil Brightman
Life of this patent
Estimating the term…
Abstract
A vehicle braking system comprising a spring brake actuator having a spring brake chamber, a spring brake control assembly and an immobiliser valve which is movable between brake release position in which the spring brake control assembly is operable to cause the flow of pressurised fluid into the spring brake chamber or to vent the spring brake chamber to a low pressure region, and an immobilise position in which the spring brake control assembly is operable to connect the spring brake chamber to a low pressure region but cannot be operated to cause the flow of pressurised fluid into the spring brake chamber.
Claims30
A vehicle braking system, comprising:
- a spring brake actuator having a spring brake chamber for controlling application of a spring brake;
- a spring brake control assembly;
- and
- an immobiliser valve which is movable between a brake release position and an immobilise position,
- the brake release position configuring the spring brake control assembly so that it is operable to move between a first state in which flow of pressurised fluid is permitted into the spring brake chamber and a second state in which the spring brake chamber is vented, and
- the immobilise position configuring the spring brake control assembly so that it is operable to move to the second state and to prevent the first state such that the immobiliser valve is activated to its immobilise position prior to, and independently from, application of the spring brake.
Dependencies are inferred from the claim text.