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AssigneeRobert Bosch GmbH
InventorsKenneth Scott Towers, John E. Mackiewicz, Richard Becker McClain, Raymon Kosarski, Jr.
Estimating the term…
A control apparatus (12) for a brake system (10) having a housing (40) with a first (42) and second (46) cylindrical members located in first (44) and second (46) bores. The first (42) and second (46) cylindrical members and corresponding first (50) and second (54) valve seat members define first (52) and second (56) chambers within the first (44) and second (46) bores which are connected to a source of pressurized fluid. First valve means (68) are located in the first chamber (52) and second valve means (70) are located in the second chamber (56). A first plunger means (72) in the first bore (40) and a first valve seat member (50) define a first brake chamber (74) which is connected to a first set (16) of wheel brakes and a second plunger means (76) in the second bore (48) and a second valve seat member (54) define a second brake chamber (78) in the second bore (46) which is connected to a second set (16′) of wheel brakes in the vehicle. A first stem (82) of the first plunger means (72) and a second stem (88) of the second plunger means (76) is connected to a balance lever (100) connected to an input rod (18). An input force applied to the input rod (18) simultaneously moves the stems (82,88) to initially interrupt communication between chambers (74,78) and a reservoir 84. Thereafter, further movement of stems (82,88) moves balls (67,67′) away from valve seat members (50,54) and allows metered pressurized fluid to be communicated to the first (16) and second (16′) set of wheel brakes to effect a primary brake application. In response to dynamic conditions sensed by a cpu (17), solenoid valves (21,25) are activated to allow pressurized fluid to move the first (50) and second (54) valve seat members into corresponding engagement with first (72) and second (76) plunger means initially interrupt communication between chambers (74,78) and reservoir (84). Thereafter, further movement of the first (50) and second (54) valve seat members allows metered pressurized fluid to be communicated to the first (16) and second (16′) set of wheel brakes to effect a secondary brake application and attenuate a dynamic condition experienced by the vehicle.
A control apparatus through which pressurized fluid is supplied to wheel brakes by primary means acting in response to an operational input from an operator for effecting a first brake application and by secondary means acting in response to a dynamic input derived from the operation of a vehicle for independently effecting a second brake application, said control apparatus having a housing with a first cylindrical member located in a first bore and a second cylindrical member located in a second bore, said first cylindrical member and a first valve seat member defining a first chamber and said second cylindrical member and a second valve seat member defining a second chamber, said first and second chambers being connected to a source of pressurized fluid, first valve means located in said first chamber and second valve means located in said second chamber, first plunger means resiliently positioned in said first bore and with said first valve seat member defining a first brake chamber in said first bore, said first brake chamber being connected to a first portion of said brake system, second plunger means resiliently positioned in said second bore and with said second valve seat defining a second brake chamber in said second bore, said second brake chamber being connected to a second portion of said brake system, said first plunger means including a first stem through which said first brake chamber is connected with a reservoir and said second plunger means including a second stem through which said second brake chamber is connected with said reservoir, and input means connected to said first and second plunger means and responsive to said input force for respectively moving said first and second stems into engagement with said first and second valve means to initially terminate communication between said first and second brake chambers and said reservoir and thereafter moving said first valve means with respect to said first valve seat member and said second valve means with respect said second valve seat to allow metered pressurized fluid communication between said first chamber and said first portion of said brake system by way of said first brake chamber and between said second chamber and said second portion of said brake system by way of said second brake chamber to effect a brake application, said secondary means being characterized by actuation means for independently moving said first and second valve seat members with respect to said first and second valve means in response to a dynamic input signal to initially interrupt communication through said first and second stems to said reservoir and thereafter initiating communication of metered pressurized fluid from said first and second chambers to said first and second portions of said brake system by way of said first and second brake chambers to effect said second brake application and attenuate the dynamic operation of the vehicle.
A control apparatus through which pressurized fluid is supplied to wheel brakes by primary means acting in response to an operational input from an operator for effecting a first brake application and by secondary means acting in response to a dynamic input derived from the operation of a vehicle for independently effecting a second brake application, said control apparatus having a housing with a first cylindrical member located in a first bore and a second cylindrical member located in a second bore, said first cylindrical member and a first valve seat member defining a first chamber and said second cylindrical member and a second valve seat member defining a second chamber, said first and second chambers being connected to a source of pressurized fluid, first valve means located in said first chamber and second valve means located in said second chamber, first plunger means resiliently positioned in said first bore and with said first valve seat member defining a first brake chamber in said first bore, said first brake chamber being is connected to a first portion of said brake system, second plunger means resiliently positioned in said second bore and with said second valve seat defining a second brake chamber in said second bore, said second brake chamber being connected to a second portion of said brake system, said first plunger means including a first stem through which said first brake chamber is connected with a reservoir and said second plunger means including a second stem through which said second brake chamber is connected with said reservoir, and input means connected to said first and second plunger means and responsive to said input force for respectively moving said first and second stems into engagement with said first and second valve means to initially terminate communication between said first and second brake chambers and said reservoir and thereafter moving said first valve means with respect to said first valve seat member and said second valve means with respect to said second valve seat to allow metered pressurized fluid communication between said first chamber and said first portion of said brake system by way of said first brake chamber and between said second chamber and said second portion of said brake system by way of said second brake chamber to effect said first brake application, said secondary actuation means being characterized by first cylindrical means located in said first bore and connected to said first plunger means to define a first dynamic actuation chamber and second cylindrical means located in said second bore and connected to said second plunger means to define a second dynamic actuation chamber, and actuation means responsive to said dynamic signal for supplying said first and second dynamic actuation chambers with pressurized fluid which acts on and move said first and second plunger means with respect to said first and second valve means to initially interrupt communication through said first and second stems to said reservoir and thereafter initiating communication of metered pressurized fluid from said first and second chambers to said first and second portions of said brake system by way of said first and second brake chambers to effect a second brake application and attenuate the dynamic operation of the vehicle.
A control apparatus through which pressurized fluid is supplied to wheel brakes by primary means acting in response to an operational input from an operator for effecting a first brake application and by secondary means acting in response to a dynamic input derived from the operation of a vehicle for independently effecting a second brake application, said control apparatus having a housing with a first cylindrical member located in a first bore and a second cylindrical member located in a second bore, said first cylindrical member and a first valve seat member defining a first chamber and said second cylindrical member and a second valve seat member defining a second chamber, said first and second chambers being connecting to a source of pressurized fluid, first valve means located in said first chamber and second valve means located in said second chamber, first plunger means resiliently positioned in said first bore and with said first valve seat member defining a first brake chamber in said first bore, said first brake chamber being is connected to a first portion of said brake system, second plunger means resiliently positioned in said second bore and with said second valve seat defining a second brake chamber in said second bore, said second brake chamber being connected to a second portion of said brake system, said first plunger means including a first stem through which said first brake chamber is connected with a reservoir and said second plunger means including a second stem through which said second brake chamber is connected with said reservoir, and input means connected to said first and second plunger means and responsive to said input force for respectively moving said first and second stems into engagement with said first and second valve means to initially terminate communication between said first and second brake chambers and said reservoir and thereafter moving said first valve means with respect to said first valve seat member and said second valve means with respect said second valve seat to allow metered pressurized fluid communication between said first chamber and said first portion of said brake system by way of said first brake chamber and between said second chamber and said second portion of said brake system by way of said second brake chamber to effect said first brake application, said secondary actuation means being characterized by piston means located in a third bore in said housing to define a dynamic actuation chamber, said piston means being linked with said input means, said piston means responding to a dynamic input signal by moving to providing a force which correspondingly moves said input means and said first and second plunger means to corresponding move said first and second valves to initially interrupt communication through said first and second stems to said reservoir and thereafter initiate communication of metered pressurized fluid from said first and second chambers to said first and second portions of said brake system by way of said first and second brake chambers to independently effect a brake application which attenuate said operation of the vehicle.
Dependencies are inferred from the claim text.