Speed control device for automobile

Abstract

Abstract PURPOSE:To maintain a favorable controlling accuracy and rapidly return a vehicle speed to a target vehicle speed by providing a deviation correcting part for operating a vehicle speed derivation integral value so as to make a controlling quantity calculated by a feedback quantity determining part the maximum controlling quantity. CONSTITUTION:Signals from a throttle position sensor 5, a vehicle speed sensor 7, a set switch 8a, a cancel switch 8b, and a resume switch 9 are inputted into an ECU 10, which, in turn, makes driving control of an actuator 4. The ECU 10 is formed as a logic operation circuit centering around a CPU 10a, a ROM 10b, and a RAM 10c, which are connected to an input part 10e and an output part 10f via a common bus 10d to carry out input and output to and from external equipment. And, when returning to a constant speed travel again due to the command of the resume switch 9 after a constant speed travel is released, the controlling quantity is restricted to the maximum controlling quantity while a vehicle speed deviation integral value is corrected to a value corresponding to the maximum controlling quantity.

Inventors

• 👤 Hitoshi Takeuchi
• 👤 均 竹内
• 👤 Masao Tsujii
• 👤 辻井　正雄
• 👤 Katsuhiro Oba
• 👤 大羽　勝廣

Bibliographic Details