Abstract: A wheel slip controlling system is provided to immediately control the rotation of the drive wheels by controlling the output power of an internal combustion engine as well as by controlling the brake mechanism of the drive wheels when a slippage is detected during the process of braking or acceleration. The brake mechanism is an anti-skid control system which uses a pressure change-over valve to accurately control the braking force. The wheel slip controlling system also includes a second throttle valve responsive to a traction control mechanism for controlling the amount of intake air of the internal combustion engine such that the speed of the driven wheels can be slowed when slipping occurs.

Abstract: A wheel slip control system used for a vehicle comprising: a pressure source selector being informed of a first pressure of a first pressure source and a second pressure of a second pressure source and adapted to select one of the first and second pressure source, a slip controller receiving a first adjustment signal for anti-skid control to adjust the first pressure provided by the pressure source selector or receiving a second adjustment signal for traction control to adjust the second pressure provided by the pressure source, selector a brake slip detector detecting the state of slipping of wheels during a braking operation of the vehicle and producing a brake slip signal, an acceleration slip detector detecting the state of slipping of wheels during an accelerating operation of the vehicle, a second throttle valve being placed at an intake air path provided with a first throttle valve interlocked to an acceleration increase member; and an electronic controller receiving the brake slip signal and providing

Abstract: A traction control device in an engine which has an intake passage. A throttle valve and a flow control valve are arranged in series in the intake passage. Where acceleration of the motor vehicle is carried out, when the speed of rotation of the driven wheel or acceleration of the speed of rotation of the driven wheel exceeds a predetermined level, the flow control valve is closed. When the speed of rotation of the driven wheel becomes lower than a predetermined level or deceleration of the speed of rotation of the driven wheel becomes larger than a predetermined level, the flow control valve is opened.

Abstract: An indicator device for vehicles such as an automobile car which can show locations in a predetermined priority sequence if there is something wrong with various functions of the car, and comprises a plurality of indicating elements superposed in layers, each having a light source, light reflecting spots to represent a character and checking means for checking the light source, sensors for detecting changes in the functions, and an electrical control circuit actuated by signals from the sensors for energizing the light sources.