Brake control device for vehicle
AssigneeAdvics Co., Ltd.
InventorsMasaki Maruyama, Shunya Watanabe
Life of this patent
Estimating the term…
Abstract
A brake control device adjusts a hydraulic pressure in a wheel cylinder in response to an operation amount of a brake operation member, and includes “a pressure adjustment unit that includes an electric pump and a pressure adjustment valve and adjusts hydraulic pressure in a pressure adjustment fluid path between the electric pump and the pressure adjustment valve”, and “a controller that controls the electric pump and the pressure adjustment valve”. The controller calculates an operation speed equivalent amount based on the operation amount, calculates a target rotation speed based on the operation speed equivalent amount, and controls the electric pump such that an actual rotation speed of the electric pump approaches the target rotation speed.
Claims2
A brake control device for a vehicle that adjusts a hydraulic pressure in a wheel cylinder in response to an operation amount of a vehicle brake operation member, the brake control device for the vehicle comprising:
- a pressure adjustment unit including an electric pump and first and second pressure adjustment valves, and configured to adjust hydraulic pressure in a pressure adjustment fluid path between the electric pump and the two pressure adjustment valves, the two pressure adjustment valves provided in series in the pressure adjustment fluid path;
- and
- a controller configured to control the electric pump and the two pressure adjustment valves, wherein
- the controller is configured to
- calculate a reference flow rate based on the operation amount,
- calculate an operation speed equivalent amount which is a state quantity corresponding to an operation speed of the brake operation member, by using a value corresponding to a change in the operation amount per unit time,
- calculate a front wheel adjustment flow rate and a rear wheel adjustment flow rate based on the operation speed equivalent amount, the front wheel adjustment flow rate being a target value of a discharge flow rate of the electric pump which is necessary for increasing a second adjustment hydraulic pressure between the first pressure adjustment valve and the second pressure adjustment valve, and the rear wheel adjustment flow rate being a target value of the discharge flow rate of electric pump which is necessary for increasing a first adjustment hydraulic pressure between the electric pump and the first pressure adjustment valve,
- calculate a target rotation speed by using the reference flow rate and the front wheel and rear wheel adjustment flow rates, and
- control the electric pump such that an actual rotation speed of the electric pump approaches the target rotation speed.
Dependencies are inferred from the claim text.