| 摘要 |
PURPOSE:To provide a power steering device to increase the steering resistance in a case quick steerings are repeated frequently more than in a case no such a quick steering is repeated, so as to prevent an excessive steering by a driver when quick steerings are repeated frequently. CONSTITUTION:A severity coefficient alpha to show the severity level of variation of the steering angle deltasw from a steering angular verocity omegasw of a steering wheel in a standard time is decided (S2 and S4). When the severity coefficient alphais less than a threshold value alphath (S5 decides as YES), a normal true solenoid current I is output (S6 to S8) to generate a normal steering resistance. On the other hand, when the severity coefficient alpha is more than the threshold value alphath, (S5 decides as NO), a true solenoid current I smaller than a normal value is output (S9, S7, and S8), so as to generate a steering resistance larger than a normal value, and thereby, an excessive steering by a driver is suppressed. |
