Patent ID: 7494443
Filing Date: 2009-02-24
Classification: B60T,Y10T

Abstract:
1. A braking force holding control device for a vehicle, comprising: a brake operating member that is operated by a driver; wheel cylinders that are respectively provided in a plurality of wheels; a pressure generating unit for generating a pressure in the wheel cylinders in accordance with an operation amount of the brake operating member when the driver operates the brake operating member; and an electronic control unit that outputs an electric signal to the pressure generating unit to command the pressure generating unit to generate a wheel cylinder pressure in the wheel cylinders, wherein after the vehicle is stopped, the braking force holding control device performs a braking force holding control in which, when the driver stops operating the brake operating member, the electronic control unit outputs the electric signal, which commands braking force to be held, so that the pressure generating unit generates the wheel cylinder pressure in the wheel cylinders, and wherein the electronic control unit derives an engine speed when no load is applied from an engine speed calculation parameter, and obtains a real engine speed, and in the case that a difference between the engine speed when no load is applied and the real engine speed is equal to or more than a predetermined value, the electronic control unit determines that the difference is a result of clutch engagement by the driver and outputs the electric signal, based on the determination, which commands release of the held braking force, so that the pressure generating unit reduces the wheel cylinder pressure in the wheel cylinders.