Simulator device for a vehicle's power-assisted braking system and method for operating a vehicle's power-assisted braking system simulator device.

Abstract

The invention relates to a simulator device (10) for an externally driven braking system of a vehicle, which can be controlled into a simulator mode at least during an externally driven braking of the vehicle, in which a counterforce (Fg) opposing the actuation can be exerted on the brake pedal (12) during actuation of a brake pedal (12), wherein the simulator device (10) can additionally be controlled into at least one further mode at least during a braking of the vehicle effected by a driver braking force, in which the brake pedal (12) is free of counterforce, and wherein the simulator device (10) can be controlled into a fault bridging mode as the at least one further mode by means of at least one fault signal (16) such that an assist force (Fu) can be exerted by means of the simulator device (10).by means of which a friction braking torque of at least one friction brake of the external force braking system can be increased by means of the support force (Fu).

Claims

A simulator device (10, 40) for a vehicle's power-assisted braking system, which can be arranged in and / or on the power-assisted braking system and can be controlled into a simulator mode at least during a power-assisted braking of the vehicle, in which the simulator device (10, 40) arranged in and / or on the power-assisted braking system is designed or operable during actuation of a brake pedal (12) of the power-assisted braking system such that a counterforce (Fg) opposing the actuation can be exerted on the brake pedal (12) by means of the simulator device (10, 40) controlled into the simulator mode; wherein the simulator device (10, 40) arranged in and / or on the power-assisted braking system is additionally controllable into at least one further mode at least during a braking of the vehicle caused by a driver braking force, in which the simulator device (10, 40) is designed or operable during actuation of the brake pedal (12),that the brake pedal (12) is free of counterforce; characterized in that the simulator device (10, 40) can be controlled into a fault bridging mode as well as at least one further mode by means of at least one fault signal (16) of at least one simulator device-specific and / or external power brake system monitoring device, wherein the simulator device (10, 40) controlled into the fault bridging mode is designed or operable during actuation of the brake pedal (12) such that a support force (Fu) can be exerted by means of the simulator device (10, 40) controlled into the fault bridging mode in such a way that a friction braking torque of at least one friction brake of the power brake system can be increased by means of the support force (Fu). wherein the simulator device (10, 40) comprises a motor (20) which is mechanically connected to the brake pedal (12) via a pinion and rack or a worm gear and worm.that by means of the motor (20) connected to the brake pedal (12) and operated in a first direction of rotation, the counterforce (Fg) can be exerted on the brake pedal (12), and by means of the motor (20) connected to the brake pedal (12) and operated in a second direction of rotation opposite to the first direction of rotation, the support force (Fu) can be exerted on the brake pedal (12) in such a way that the friction braking torque of the at least one friction brake can be increased. Simulator device (10, 40) according to claim 1, wherein the simulator device (10, 40) comprises a control unit (26) which is designed to determine a target counterforce magnitude and / or a target support force magnitude taking into account at least one provided sensor signal (30) with respect to an actuation path and / or an actuation force of the actuation of the brake pedal (12), and to control the simulator device (10, 40) such that a counterforce (Fg) corresponding to the determined target counterforce magnitude and / or a support force (Fu) corresponding to the determined target support force magnitude can be exerted by means of the simulator device (10, 40). Simulator device (10, 40) according to claim 2, wherein the control device (26) is additionally designed to determine the target counterforce magnitude and / or the target support force magnitude, taking into additional consideration a provided information signal (32) regarding a possible operation of at least one return pump of the external force braking system. Simulator device (10, 40) according to claim 3, wherein the motor (20) is torque-free adjustable in the event of an interruption and / or impairment of its power supply. Simulator device (10, 40) according to claim 3 or 4, wherein the motor (20) and / or the simulator device (10, 40) are connected to the brake pedal (12) via at least one predetermined breaking point. External force braking system for a vehicle with a simulator device (10, 40) according to one of the preceding claims. Method for operating a simulator device (10, 40) of an external power braking system of a vehicle according to any one of claims 1 to 6 comprising the steps of: controlling the simulator device (10, 40) during an external power-induced deceleration or braking of the vehicle such that a counterforce (Fg) is exerted on a brake pedal (12) of the external power braking system by means of the simulator device (10, 40), which is directed against an actuation of the brake pedal (12) (S1); and controlling the simulator device (10, 40) during a deceleration or braking of the vehicle caused by means of the driver's braking force such that an assisting force (Fu) is exerted by means of the simulator device (10, 40), by means of which a friction braking torque of at least one friction brake of the external power braking system is increased (S2). Method according to claim 7, wherein a target counterforce magnitude and / or a target support force magnitude are determined taking into account at least one actuation path and / or actuation strength of the actuation of the brake pedal (12), and wherein the simulator device (10, 40) is controlled such that a counterforce (Fg) corresponding to the determined target counterforce magnitude and / or a support force (Fu) corresponding to the determined target support force magnitude is exerted by means of the simulator device (10, 40). Method according to claim 8, wherein the target counterforce magnitude and / or the target support force magnitude are determined taking additional account of a possible operation of at least one return pump of the external force braking system. Method according to one of claims 7 to 9, wherein a motor (20) of the simulator device (10, 40), which is mechanically connected to the brake pedal (12) via a pinion and rack or a worm gear and worm, is operated in a first direction of rotation to exert the counterforce (Fg) on ​​the brake pedal (12), and in a second direction of rotation opposite to the first direction of rotation to exert the support force (Fu) on the brake pedal (12), thereby increasing the friction braking torque of the at least one friction brake. Method for operating an external power braking system of a vehicle comprising the step: operating a simulator device (10, 40) of the external power braking system according to the method of one of claims 7 to 10.

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