| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for securing a negative pressure of a booster capable of suitably suppressing deterioration of assist function of a brake booster even if a brake operation is repeated when a catalyst warm-up control is performed in a vehicle having an ejector. SOLUTION: An ECU40A is used while the catalyst warm-up control is performed in a vehicle equipped with the ejector 30 which generates larger negative pressure than an intake-manifold negative pressure trying to take out from an intake manifold 14, and supplies the generated negative pressure to a negative pressure chamber of the brake booster 22. The ECUA is equipped with a brake operation determination means for determining whether or not the brake operation over a predetermined number of times within a predetermined period of time is performed, and a negative pressure securing control means for performing a negative pressure securing control to increase the intake-manifold negative pressure when a brake operation determination means makes an affirmative determination. COPYRIGHT: (C)2008,JPO&INPIT
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