| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum pump control unit making it possible to upgrade a braking force.SOLUTION: A vacuum pump control unit 80 that controls a vacuum pump 10 using an On negative pressure threshold which is a negative pressure threshold permitting initiation of actuation of the vacuum pump 10 that brings a negative pressure chamber 12 of a negative pressure booster 11, which is included in a vehicle, to a negative pressure includes: decision means 81 that decides whether a slope angle &thetas; of a road on which the vehicle is run to descend is larger than a predetermined slope angle Θ; and modification means 82 that, if the slope angle &thetas; of the road is larger than the predetermined slope angle Θ, modifies the On negative pressure threshold. Preferably, if the slope angle &thetas; of the road is larger than the predetermined slope angle Θ, as a difference between the slope angle &thetas; of the road and the predetermined slope angle Θ gets larger, the On negative pressure threshold is set to a smaller negative pressure threshold. More preferably, if a period t1 during which the slope angle &thetas; of the road is larger than the predetermined slope angle Θ is longer than a predetermined period T, the modification means 82 modifies the On negative pressure threshold. |
