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US 2001/0024159 A1Published application
Method and device for diagnosing a brake switch
AssigneeRobert Bosch GmbH
InventorIan Faye
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AssigneeRobert Bosch GmbH
InventorIan Faye
Estimating the term…
A method of generating an error signal (F) in a motor vehicle having a brake actuating means (16) that is actuatable by the vehicle's driver, through which a brake system is activated, and detection means (16a), through which actuation of the brake actuating means (16) is detected, a gas pedal (18), a gas pedal position detector (18a), wherein a time at which the gas pedal is released (TO) is determined, a vehicle deceleration (av) is determined, which represents the longitudinal deceleration of the vehicle, a braking status (BSon/off) is determined, which represents the operating status of the brake actuating means (16a), an elapsed time since gas pedal release (Telapse) is monitored, and an error signal (F) is generated as a function of the vehicle deceleration (av), the elapsed time (Telapse), and the braking status (BSon/off).
A method of generating an error signal (F) in a motor vehicle having a brake actuating means (16) that is actuatable by the vehicle driver, through which a brake system is activated, and detection means (16a), through which actuation of the brake actuating means (16) is detected, a gas pedal (18), a gas pedal position detector (18a) , characterized in that a time at which the gas pedal is released (TO) is determined, a vehicle deceleration (av) is determined, which represents the longitudinal deceleration of the vehicle, a braking status (BSon/off) is determined, which represents the operating status of the brake actuating means (16a), an elapsed time since gas pedal release (Telapse) is monitored, and an error signal (F) is generated as a function of the vehicle deceleration (av), the elapsed time (Telapse), and the braking status (BSon/off).
The method according to any of the preceding claims characterized in that a gas pedal release velocity (vgas) is determined, and the predetermined vehicle deceleration (aexp) and/or the predetermined time quantity (Texp) is calculated as a function of at least the gas pedal release velocity (vgas).
The method according to any of the preceding claims characterized in that the predetermined vehicle deceleration (aexp) and/or the predetermined time quantity (Texp) is determined based upon past vehicle operation.
The method according to any of the preceding claims characterized in that the predetermined vehicle deceleration (aexp) and/or the predetermined time quantity (Texp) is determined based upon past driving behavior of a specific driver.
The method according to any of the preceding claims characterized in that the activating means is a brake pedal and the detection means is a brake switch.
The method according to any of the preceding claims characterized in that the error signal (F) represents a regular or irregular operation and a display means (17) is provided for receiving the error signal (F) and whose status changes upon receiving the error signal (F).
The method according to any of the preceding claims characterized in that the error signal represents an irregular status.
The method according to any of the preceding claims characterized in that the predetermined time quantity (Texp) and/or the predetermined vehicle deceleration (aexp) is adjusted to account for uphill or downhill operation.
The method according to any of the preceding claims characterized in that the adjustment to the predetermined time quantity (Texp) and/or the predetermined vehicle deceleration (aexp) is a function of direct inclination detection.
The method according to any of the preceding claims characterized in that the adjustment to the predetermined time quantity (Texp) and/or the predetermined vehicle deceleration (aexp) is a function of deviations in the mass estimate.
The method according to any of the preceding claims characterized in that the vehicle deceleration (av) is determined as a function of the rotation speed (vrad) of at least one wheel.
The method according to any of the preceding claims characterized in that the operation status of a clutch is determined and accounted for in generating the error signal.
A device for generating an error signal (F) in a motor vehicle having a brake actuating means (16) that is actuatable by the vehicle's driver, through which a brake system is activated, and detection means (16a), through which actuation of the brake actuating means (16) is detected, a gas pedal (18), a gas pedal position detector (18a), characterized in that a means is provided for determining a time at which the gas pedal is released (TO), determining a vehicle deceleration (av), which represents the longitudinal deceleration of the vehicle, determining a braking status (BSon/off), which represents the operating status of the brake actuating means (16a), monitoring the elapsed time (Telapse) since gas pedal release, and generating an error signal (F) as a function of the vehicle deceleration (av), the elapsed time (Telapse), and the braking status (BSon/off).
Dependencies are inferred from the claim text.