Patent ID: 9333960
Filing Date: 2016-05-10
CPC Classification: B60T

Claim Text:
1. A vehicle braking control device adapted to a vehicle brake device having an electromagnetic valve disposed between a master cylinder and a wheel cylinder for controlling brake fluid flow therebetween in response to an input electric energy, comprising: a pressure differential control portion for generating a predetermined pressure differential between a master cylinder side and a wheel cylinder side with respect to the electromagnetic valve; a valve opening electric energy obtaining portion for obtaining the input electric energy upon opening of the electromagnetic valve as a valve opening electric energy, by changing the input electric energy towards an opening side of the electromagnetic valve with time, under the predetermined pressure differential being generated by the pressure differential control portion, after the input electric energy has been changed to close the electromagnetic valve; and an operation characteristic setting portion for setting an operation characteristic which is a relationship between the input electric energy to the electromagnetic valve and the predetermined pressure differential between the master cylinder side and the wheel cylinder side with respect to the electromagnetic valve based on the valve opening electric energy obtained by the valve opening electric energy obtaining portion corresponding to the predetermined pressure differential; wherein, the valve opening electric energy obtaining portion changes the input electric energy at a valve closing side or a valve opening side of the electromagnetic valve with an input electric energy change amount per unit of time at the valve closing side or the valve opening side which is larger than the input electric energy change amount per unit of time at the valve closing side or the valve opening side before the time of opening of the electromagnetic valve upon obtaining of the valve opening electric energy, wherein the operation characteristic setting portion sets the operation characteristic of the electromagnetic valve based on a first valve opening electric energy which is the valve opening electric energy obtained by the valve opening electric energy obtaining portion corresponding to a predetermined first pressure differential generated by the pressure differential control portion and a second valve opening electric energy which is the valve opening electric energy obtained by the valve opening electric energy obtaining portion corresponding to a predetermined second pressure differential different which is different from the first pressure differential generated by the pressure differential control portion; and wherein, the valve opening electric energy obtaining portion obtains the input electric energy at the time of opening of the electromagnetic valve as the second valve opening electric energy by changing the input electric energy to the valve opening side with a first input electric energy change amount per unit of time after changing the input electric energy to the valve opening side for the electromagnetic valve with a second input electric energy change amount per unit of time to a predetermined value where the electromagnetic valve corresponding to the first valve opening electric energy is not opened upon obtaining the second valve opening electric energy of the same electromagnetic valve, after obtaining the first valve opening electric energy of the electromagnetic valve, the first input electric energy change amount per unit time being smaller than the second input electric energy change amount per unit time.