摘要:
The invention relates to a method for detection and reduction of the negative consequences of a leak in a pneumatic brake line (28, 30) of an electropneumatic brake device (1) having an ABS control, which has ABS pressure control valves (32, 34) in the brake lines (28, 30) and a pressure sensor in a pressure control module (4). According to the invention, the leak is detected by measuring the actual brake pressure by means of the pressure sensor and switching the ABS pressure control valves (32, 34), and the consequences of said leak are reduced by blocking the brake line affected by the leak (28, 30) by means of the associated ABS pressure control valve (32, 34).
摘要:
The invention relates to a method or a device for determining a variable describing the speed of a vehicle. Said variable is determined according to the speed of a selected wheel. At least one or two plausibility checks are carried out on the basis of the wheel speeds, the results of which are taken into account when selecting the wheel. The first plausibility check establishes whether the variable describing the speed of the vehicle can be determined according to one wheel whose velocity is higher than a variable describing the speed of said vehicle. The second plausibility check establishes whether the variable describing the speed of the vehicle can be determined according to one wheel whose velocity is lower than a variable describing the speed of said vehicle.
摘要:
In an antilock braking system and drive slip control system, in particular for cross-country driving, the vehicle deceleration or acceleration determined from the wheel speeds is compared with the vehicle deceleration or acceleration measured by a sensor. Errors of measurement in the vehicle deceleration or acceleration due to a descending or ascending gradient are detected and used to reduce the sensitivity of the control system.
摘要:
A traction control system for a motor vehicle of the type comprising a set of brakes (22L, 22R, 24L, 24R) for respective wheels (8L, 8R, 12L, 12R), brake control means (20) for controlling the braking forces exerted by the brakes on the respective wheels, slip detector means (25L, 25R, 26L, 26R, 27, 31) for detecting the slip rates of the vehicle wheels, slip control means (33) connected between the slip detector means and the brake control means for causing the latter to controllably actuate the brakes so as to maintain the slip rates of the wheels less than a prescribed limit, and throttle control means (14, 35, 40) for controllably varying engine power in response to accelerator displacement. In order to preclude the danger of vehicle turnover, wheel liftoff detector means (13, 27, 28L, 28R, 29L, 29R, 34) are provided for detecting, when the vehicle is taking a curve, the lifting of the inside wheels of the vehicle off the road surface. Upon detection of inside wheel liftoff, the detector means not only disable the slip control means (33), thereby inhibiting traction control relying on wheel braking, but also override engine throttle control for decreasing the engine power to a predetermined degree.
摘要:
A traction control system for a motor vehicle of the type comprising a set of brakes (22L, 22R, 24L, 24R) for respective wheels (8L, 8R, 12L, 12R), brake control means (20) for controlling the braking forces exerted by the brakes on the respective wheels, slip detector means (25L, 25R, 26L, 26R, 27, 31) for detecting the slip rates of the vehicle wheels, slip control means (33) connected between the slip detector means and the brake control means for causing the latter to controllably actuate the brakes so as to maintain the slip rates of the wheels less than a prescribed limit, and throttle control means (14, 35, 40) for controllably varying engine power in response to accelerator displacement. In order to preclude the danger of vehicle turnover, wheel liftoff detector means (13, 27, 28L, 28R, 29L, 29R, 34) are provided for detecting, when the vehicle is taking a curve, the lifting of the inside wheels of the vehicle off the road surface. Upon detection of inside wheel liftoff, the detector means not only disable the slip control means (33), thereby inhibiting traction control relying on wheel braking, but also override engine throttle control for decreasing the engine power to a predetermined degree.
摘要:
A circuit arrangement is proposed for monitoring a control circuit which has a drive transistor (T1) with an inductive load (L) and a second transistor (T2) in a circuit arm parallel to the inductive load (L). The proposed circuit arrangement is provided with an additional external current-measuring device (T3, RM, 3): a switching element parallel to the drive transistor (T1) is provided, in particular a transistor (T3) and an ohmic measuring resistor (RM). At a test instant (ttest), the current (iL) flowing through the inductive load (L) is diverted to the measuring device and induces a voltage (KM) at the measuring resistor (RM) which is indicative of the status of the control circuit.
摘要:
La présente invention décrit un système antipatinage à l'accélération qui actionne les freins en cas de patinage des roues. Un couple de freinage maximal est prédéterminé en fonction du couple d'entraînement pour éviter un calage du moteur lors du fonctionnement du système antipatinage à l'accélération.