초록 ▼

The similarity groups of the pressure differential—current characteristics of solenoid valves are measured in advance, and the measurement results are used to select the solenoid valves to be used for first to fourth pressure increase control valves. Only solenoid valves in the same region in

The similarity groups of the pressure differential—current characteristics of solenoid valves are measured in advance, and the measurement results are used to select the solenoid valves to be used for first to fourth pressure increase control valves. Only solenoid valves in the same region in terms of their similarity group of the pressure differential—current characteristics are used for the first to fourth pressure increase control valves. A board on which the first to fourth control valves are mounted is provided with a mark unit that indicates the similarity group of the pressure differential—current characteristics of the first to forth pressure increase control valves. The mark unit includes a resistor. A brake ECU uses the resistance value of the resistor to identify the similarity group of the pressure differential—current characteristics of the first to fourth pressure increase control valves.

대표청구항 ▼

What is claimed is: 1. A vehicle brake fluid pressure control device, comprising: a solenoid valve for generating a pressure differential between upstream and downstream sides thereof in accordance with the magnitude of a control current; a control unit for controlling the magnitude of the control

What is claimed is: 1. A vehicle brake fluid pressure control device, comprising: a solenoid valve for generating a pressure differential between upstream and downstream sides thereof in accordance with the magnitude of a control current; a control unit for controlling the magnitude of the control current applied to the solenoid valve to generate a target pressure differential between the upstream and downstream sides of the solenoid valve; and a mark unit for indicating a similarity group to which the solenoid belongs, among a plurality of predetermined similarity groups, wherein the predetermined similarity groups are grouped according to similarity of pressure differential and current characteristics, the control unit stores a map in which the entire range of variation in pressure differential and current characteristics of the solenoid valve is divided into a plurality of regions according to similarity, and the predetermined similarity groups respectively correspond to the regions, and the mark unit signals to the control unit the similarity group to which the solenoid valve belongs, and when the control unit has identified which one of the plurality of regions the solenoid valve is within, according to the similarity group signaled by the mark unit, the control unit sets the magnitude of the control current to a value that accords with the identified region when brake fluid pressure control is performed. 2. The vehicle brake fluid pressure control device according to claim 1, wherein the solenoid valve is one of a plurality of solenoid valves that are, mounted on a single board and are electrically connected to wiring provided on the board, the plurality of solenoid valves includes only solenoid valves that are in one of the predetermined similarity groups, and the mark unit indicates the similarity group to which the solenoid valves belong. 3. The vehicle brake fluid pressure control device according to claim 1, wherein the mark unit uses a resistance value to indicate the similarity group, and the resistance value of the mark unit is set to be different for each of the plurality of predetermined similarity groups. 4. The vehicle brake fluid pressure control device according to claim 3, wherein the control unit identifies the similarity group of the solenoid valve by reading the electric potential of a determined portion that changes in accordance with the resistance value of the mark unit. 5. The vehicle brake fluid pressure control device according to claim 3, wherein the resistance value that indicates a central region that is at the center of the plurality of regions is set to substantially infinity, and the resistance values that indicate the other regions are set to different finite values, and if the control unit detects that the resistance values indicating the other regions has become substantially infinity due to disconnection, the control unit determines that the solenoid valves are in the central region, and sets the magnitude of the control current based on this determination. 6. The vehicle brake fluid pressure control device according to claim 1, further comprising: a master cylinder for generating brake fluid pressure based on an operation of a brake operating member performed by a driver; a plurality of wheel cylinders for generating braking force using brake fluid pressure generated by the master cylinder; main conduits for connecting the master cylinder and the wheel cylinders; and a plurality of pressure increase control valves, provided in the main conduits at positions corresponding to each of the wheel cylinders, for controlling brake fluid pressure applied to the wheel cylinders, wherein the control unit supplies the control current to respective solenoid coils provided in the pressure increase control valves in order to drive the pressure increase control valves, and the mark unit indicates to the control unit the similarity group to which the pressure increase control valves belong. 7. A vehicle brake fluid pressure control device, comprising: a plurality of solenoid valves, wherein each solenoid valve generates a pressure differential between upstream and downstream sides thereof in accordance with the magnitude of a control current, the plurality of solenoid valves are selected to belong to a single similarity group, among a plurality of predetermined similarity groups, according to pressure differential and current characteristics, the predetermined similarity groups are grouped according to degree of similarity of pressure differential and current characteristics; a control unit for controlling the magnitude of control currents applied to the solenoid valves to generate a target pressure differential between the upstream and downstream sides of the solenoid valves; and a mark unit for indicating the single similarity group to which the solenoid valves belong, wherein the control unit stores a map in which a range of variation in pressure differential and current characteristics of the solenoid valves is divided into a plurality of regions according to similarity, and the predetermined similarity groups respectively correspond to the regions, and the mark unit signals to the control unit the single similarity group to which the solenoid valves belong, and when the control unit has identified the similarity group to which the solenoid valves belong, according to the mark unit, the control unit sets the magnitude of the control currents according to the differential and current characteristics of the region of the map that corresponds to the identified similarity group, when a brake fluid pressure control operation is performed. 8. A vehicle brake fluid pressure control device according to claim 7, wherein a resistance value of the mark unit indicates the similarity group to which the solenoid valves belong. 9. A vehicle brake fluid pressure control device according to claim 7, wherein the control unit identifies the similarity group of the solenoid valves by reading an electric potential of a predetermined circuit location that changes in accordance with the resistance value of the mark unit.