Importance

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Abstract

A brake device comprising a master cylinder (2), a braking mechanism (C), a plurality of pedal operation detecting sensors (BS), a fluid pressure-generating mechanism (A) driven by a motor (M) to generate fluid pressure and to supply the generated fluid pressure to an input side of the braking mechanism (C), control means (B) for controlling the electric current value impressed on the motor (M) in accordance with the output values of the pedal operation detecting sensors (BS), and a fluid pressure sensor (FS) for detecting fluid pressure supplied to the input side of the braking mechanism (C) in order to render the brake device capable of executing control of the electric current value impressed on the motor even when primary failure occurs in the plurality of pedal operation detecting sensors; wherein the control means (B) controls the electric current value impressed on the motor (M) in accordance with the output values from the plurality of pedal operation detecting sensors (BS) in a case in which the relationship of the output values is within a normal range, and identifies the pedal operation detecting sensor (BS) for use in controlling the electric current value on the basis of the relationship between each of the output values and the output value from the fluid pressure sensor (FS) in a state in which no electric current is being impressed in a case in which the relationship is outside the normal range.

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First Claim