Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions


  • CPC
  • B60T8/00
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Sub Industries

B60T8/17Using electrical or electronic regulation means to control braking B60T8/1701Braking or traction control means specially adapted for particular types of vehicles B60T8/1703for aircrafts B60T8/1705for rail vehicles B60T8/1706for single-track vehicles B60T8/1708for lorries or tractor-trailer combinations B60T8/171Detecting parameters used in the regulation Measuring values used in the regulation B60T8/172Determining control parameters used in the regulation B60T8/1725Using tyre sensors B60T8/173Eliminating or reducing the effect of unwanted signals B60T8/174characterised by using special control logic B60T8/175Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration B60T8/1755Brake regulation specially adapted to control the stability of the vehicle B60T8/17551determining control parameters related to vehicle stability used in the regulation B60T8/17552responsive to the tire sideslip angle or the vehicle body slip angle B60T8/17554specially adapted for enhancing stability around the vehicles longitudinal axle B60T8/17555specially adapted for enhancing driver or passenger comfort B60T8/17557specially adapted for lane departure prevention B60T8/17558specially adapted for collision avoidance or collision mitigation B60T8/176Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration B60T8/1761responsive to wheel or brake dynamics B60T8/17613based on analogue circuits or digital circuits comprised of discrete electronic elements B60T8/17616Microprocessor-based systems B60T8/1763responsive to the coefficient of friction between the wheels and the ground surface B60T8/17633based on analogue circuits or digital circuits comprised of discrete electronic elements B60T8/17636Microprocessor-based systems B60T8/1764Regulation during travel on surface with different coefficients of friction B60T8/1766Proportioning of brake forces according to vehicle axle loads B60T8/1769specially adapted for vehicles having more than one driven axle B60T8/18responsive to vehicle weight or load B60T8/1806characterised by the calibration process or the means therefor B60T8/1812characterised by the means for pressure reduction B60T8/1818Lever mechanism B60T8/1825Means for changing the diaphragm area submitted to pressure B60T8/1831pressure reducing or limiting valves B60T8/1837characterised by the load-detecting arrangements B60T8/1843Arrangements for detecting air spring pressure B60T8/185Arrangements for detecting vehicle level B60T8/1856Arrangements for detecting suspension spring load B60T8/1862comprising sensors of the type providing a fluid output signal representing the load on the vehicle suspension B60T8/1868comprising sensors of the type providing a mechanical output signal representing the load on the vehicle suspension B60T8/1875comprising sensors of the type providing an electrical output signal representing the load on the vehicle suspension B60T8/1881characterised by failure-responsive means B60T8/1887especially adapted for tractor-trailer combinations B60T8/1893especially adapted for railway vehicles B60T8/24responsive to vehicle inclination or change of direction B60T8/241Lateral vehicle inclination B60T8/243for roll-over protection B60T8/245Longitudinal vehicle inclination B60T8/246Change of direction B60T8/248Trailer sway B60T8/26characterised by producing differential braking between front and rear wheels B60T8/261specially adapted for use in motorcycles B60T8/262using valves with stepped characteristics B60T8/263for pneumatic brake systems B60T8/265for hydraulic brake systems B60T8/266using valves or actuators with external control means B60T8/267for hybrid systems with different kind of brakes on different axles B60T8/268using the valves of an ABS, ASR or ESP system B60T8/28responsive to deceleration B60T8/282using ball and ramp B60T8/285using horizontal moving mass B60T8/287using pendulums B60T8/30responsive to load B60T8/303using pneumatic valves B60T8/306using hydraulic valves B60T8/32responsive to a speed condition B60T8/3205acceleration B60T8/321deceleration B60T8/3215Systems characterised by having means acting on components of the drive line B60T8/322Systems specially adapted for vehicles driven by more than one axle B60T8/3225Systems specially adapted for single-track vehicles B60T8/323Systems specially adapted for tractor-trailer combinations B60T8/3235Systems specially adapted for rail vehicles B60T8/324Speed measurement by means of centrifugal governers or the like B60T8/3245responsive to the speed difference between wheels and rail, or between two wheels or two axles B60T8/325Systems specially adapted for aircraft B60T8/3255Systems in which the braking action is dependent on brake pedal data B60T8/326Hydraulic systems B60T8/3265with control of the booster B60T8/327Pneumatic systems B60T8/3275Systems with a braking assistant function B60T8/328Systems sharing components with other fluid systems onboard the vehicle B60T8/3285the other fluid systems being suspension elements B60T8/329Systems characterised by their speed sensor arrangements B60T8/3295Systems in which there is a pulsating signal superposed on the command signal B60T8/34having a fluid pressure regulator responsive to a speed condition B60T8/341Systems characterised by their valves B60T8/342Pneumatic systems B60T8/343Systems characterised by their lay-out B60T8/344Hydraulic systems B60T8/345having more than one brake circuit per wheel B60T8/3462 Channel systems B60T8/3473 Channel systems B60T8/3484 Channel systems B60T8/349Systems adapted to control a set of axles B60T8/36including a pilot valve responding to an electromagnetic force B60T8/3605wherein the pilot valve is mounted in a circuit controlling the working fluid system B60T8/361wherein the pilot valve is mounted in a circuit controlling an auxiliary fluid system B60T8/3615Electromagnetic valves specially adapted for anti-lock brake and traction control systems B60T8/362in pneumatic systems B60T8/3625having at least one vacuum connection B60T8/363in hydraulic systems B60T8/3635switching between more than two connections B60T8/364switching between a number of discrete positions as a function of the applied signal B60T8/3645having more than one electromagnetic coil inside a common housing B60T8/365combining a plurality of functions in one unit B60T8/3655Continuously controlled electromagnetic valves B60T8/366Valve details B60T8/3665Sliding valves B60T8/367Seat valves B60T8/3675integrated in modulator units B60T8/368combined with other mechanical components B60T8/3685characterised by the mounting of the modulator unit onto the vehicle B60T8/369Valves using piezo-electric elements B60T8/3695wherein the pilot valve is mounted separately from its power section B60T8/38including valve means of the relay or driver controlled type B60T8/40comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid B60T8/4004Repositioning the piston(s) of the brake control means by means of a fluid pressurising means in order to reduce the brake pressure B60T8/4009the brake control means being the wheel cylinders B60T8/4013Fluid pressurising means for more than one fluid circuit B60T8/4018Pump units characterised by their drive mechanisms B60T8/4022Pump units driven by an individual electric motor B60T8/4027Pump units driven by (parts of) the vehicle propulsion unit B60T8/4031Pump units characterised by their construction or mounting B60T8/4036Pump units characterised by their failure-responsive means B60T8/404Control of the pump unit B60T8/4045involving ON/OFF switching B60T8/405involving the start-up phase B60T8/4054involving the delivery pressure control B60T8/4059involving the rate of delivery B60T8/4063involving the direction of fluid flow B60T8/4068the additional fluid circuit comprising means for attenuating pressure pulsations B60T8/4072Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking B60T8/4077Systems in which the booster is used as an auxiliary pressure source B60T8/4081Systems with stroke simulating devices for driver input B60T8/4086the stroke simulating device being connected to, or integrated in the driver input device B60T8/409characterised by details of the stroke simulating device B60T8/4095including wheel driven pumps for detecting a speed condition B60T8/42having expanding chambers for controlling pressure B60T8/4208Debooster systems B60T8/4216having a mechanically actuated expansion unit B60T8/4225having a fluid actuated expansion unit B60T8/4233with brake pressure relief by introducing fluid pressure into the expansion unit B60T8/4241pneumatically B60T8/425using a vacuum B60T8/4258with brake pressure relief by creating vacuum inside the expansion unit B60T8/4266having an electro-mechanically actuated expansion unit B60T8/4275Pump-back systems B60T8/4283having a pressure sensitive inlet valve B60T8/4291having means to reduce or eliminate pedal kick-back B60T8/44co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device B60T8/441using hydraulic boosters B60T8/442the booster being a fluid return pump B60T8/443using compressed air B60T8/444using vacuum B60T8/445replenishing the released brake fluid volume into the brake piping B60T8/446replenishing the released brake fluid volume via the master cylinder B60T8/447Reducing the boost of the power-assist booster means to reduce brake pressure B60T8/448the power-assist booster means being a vacuum or compressed air booster B60T8/449of the multiple booster type B60T8/46the pressure being reduced by exhausting fluid B60T8/48connecting the brake actuator to an alternative or additional source of fluid pressure B60T8/4809Traction control, stability control, using both the wheel brakes and other automatic braking systems B60T8/4818in pneumatic brake systems B60T8/4827in hydraulic brake systems B60T8/4836wherein a booster output pressure is used for normal or anti lock braking B60T8/4845using a booster or a master cylinder for traction control B60T8/4854pneumatic boosters B60T8/4863closed systems B60T8/4872pump-back systems B60T8/4881having priming means B60T8/489using separate traction control modulators B60T8/50having means for controlling the rate at which pressure is reapplied to or released from the brake B60T8/5006Pressure reapplication by pulsing of valves B60T8/5012Pressure reapplication using a plurality of valves in parallel B60T8/5018Pressure reapplication using restrictions B60T8/5025in hydraulic brake systems B60T8/5031open systems B60T8/5037closed systems B60T8/5043debooster systems B60T8/505Pressure reapplication in a mu-split situation B60T8/5056Pressure reapplication using memory devices B60T8/5062using memory chambers B60T8/5068having decay means B60T8/5075Pressure release by pulsing of valves B60T8/5081Pressure release using a plurality of valves in parallel B60T8/5087Pressure release using restrictions B60T8/5093in hydraulic brake systems B60T8/52Torque sensing B60T8/54by mechanical means B60T8/56having means for changing the coefficient of friction B60T8/58responsive to speed and another condition or to plural speed conditions B60T8/72responsive to a difference between a speed condition B60T8/74sensing a rate of change of velocity B60T8/76two or more sensing means from different wheels indicative of the same type of speed condition B60T8/86wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs B60T8/88with failure responsive means B60T8/885using electrical circuitry B60T8/90using a simulated speed signal to test speed responsive control means B60T8/92automatically taking corrective action B60T8/94on a fluid pressure regulator B60T8/96on speed responsive control means