Patent
Brake control method having booster runout and pedal force estimation
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TLDR
In this paper, a mathematical model of the vacuum booster is used to estimate the apply chamber pressure and the operator brake pedal force, based on measured values of engine vacuum (or manifold absolute pressure) and master cylinder pressure.Abstract:
An electrically augmented brake control method in which vacuum booster run-out and pedal force are accurately predicted as a function of master cylinder pressure and engine vacuum, thereby eliminating the expense of dedicated sensors for measuring the same. A mathematical model of the vacuum booster is used to estimate the apply chamber pressure and the operator brake pedal force, based on measured values of engine vacuum (or manifold absolute pressure) and master cylinder pressure. The point of vacuum booster runout can be detected as the point at which the estimated apply chamber pressure reaches atmospheric pressure. In a preferred embodiment, a force-balance approach is used to carry out the estimation in an accurate but simple manner that is especially amenable to real-time control in an automotive on-board micro-controller.read more
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Patent
Vehicle brake boost assist control
TL;DR: In this paper, a vehicle hydraulic braking system has a motor driven pump with an output to a brake apply valve and valve apparatus between a master cylinder and the brake applies valve capable of communicating or blocking master cylinder pressure from the apply valve.
Patent
Brake booster vacuum prediction algorithm and method of use therefor
TL;DR: In this paper, an algorithm residing in the ECM of a motor vehicle is used to predict brake booster vacuum for vehicles using vacuum for brake pedal assist, where the predicted brake boosters vacuum is compared to a calibrated brake booster threshold to determine if adequate booster vacuum is available to meet vehicle braking requirements, whereupon engine operation can be modified, as necessary, to improve intake manifold vacuum.
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System and method for detection of degradation of vacuum brake booster sensor
TL;DR: In this paper, the degradation of a sensor in a vacuum brake booster coupled to a manifold of an internal combustion engine is detected by measuring an engine or vehicle operating parameter to detect operating or control conditions.
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Brake pressure control device, especially for a road vehicle
Helmut Pueschel,Herbert Keller +1 more
TL;DR: In this paper, a pneumatic brake power booster is configured in such a way that it reaches its control point (A0, A1) at a master cylinder pressure (PHZ) of as little as less than 50 bar.
Patent
Method for estimation
TL;DR: In this paper, a direct injection engine is coupled to a vacuum brake booster wherein vacuum created from engine pumping is used to supplement driver braking force, and a method is disclosed for estimating pressure in the brake booster based on operating conditions.
References
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Patent
Brake pressure control method and apparatus, including a brake pressure booster
TL;DR: In this paper, a motor vehicle brake system, a force increase gradient at the brake pedal is determined and, in response thereto, the brake pressure is boosted in a manner which provides for successively associating respective threshold values (Fv max) with respective instantaneous force increase gradients (FV ped) during a braking operation.
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Apparatus for controlling negative pressure for a brake booster in a diesel engine
TL;DR: In this article, an improved apparatus for controlling brake force of a vehicle is disclosed, where an electric control unit (ECU) actuates the throttle valve to increase the absolute magnitude negative pressure when the ECU determines the differential pressure is smaller than a predetermined magnitude.
Patent
Driving force control system
Yoshinori Katayama,Terukiyo Murakami,Hiroyuki Asano,Yuichi Abe,Haruhiko Iizuka,Kazuaki Shimizu,Yoshio Fukai +6 more
TL;DR: In this article, the authors proved a driving force control system which comprises device for measuring operating state of the vehicle brake system and generating an output signal, and device for controlling the driving force upon a predetermined condition being fulfilled after the output signal has indicated a predetermined operating state.
Patent
Method and device for brake application
John P. Whaite,Prakash Krishnamurthi Kulkarni,Bryan Todd Fulmer,Craig A. Osterday,Donald L. Parker,Vivek Jaikamal +5 more
TL;DR: In this paper, a method and device for brake application provides braking pressure augmentation when preferred, where a power booster and master cylinder generate a braking pressure in relation to an operator's input on the brake pedal.