Abstract:
PURPOSE: A combustion-noise reduction system and a driving method thereof are provided to increase the combustion stability of an engine and fuel efficiency since a main PID(Proportional Integral Derivative) controller and a pilot PID controller control a main spraying timing. CONSTITUTION: A combustion-noise reduction system comprises a main PID controller(PID1) and a pilot PID controller(PID2). The main PID controller corrects a main spraying timing according to the difference value between desired MFB50 and measured MFB50. If measured MEB50 is within reference MFB range and the measured main spraying timing is earlier than original main spraying timing or a maximum pressure of combustion is higher than a reference pressure of combustion, then the pilot PID controller controls pilot spraying to prevent the increase of combustion noise.
Abstract:
PURPOSE: An engine control device of a diesel vehicle and a method thereof are provided to improve the reliability by increasing power and acceleration responsiveness with correcting the fuel amount, the injection time and the injection pressure corresponding to sudden acceleration demand. CONSTITUTION: An engine control device of a diesel vehicle with a variable geometry turbocharger comprises an engine RPM(Revolution Per Minute) detecting unit(10) detecting RPM of the engine; an injection pressure detecting unit(20) detecting injection pressure corresponding to the suction air amount, engine RPM and various correction factors; a boost pressure detecting unit(30) detecting boost pressure supercharged to an intake manifold by a turbine; an accelerator pedal detecting unit(40) detecting the displacement of the opening degree of the accelerator pedal; and a control unit(50) correcting injection time, injection pressure and the fuel amount by adding to or subtracting the specific value from the map in detecting sudden acceleration purpose of a driver and difference between the present boost pressure and the desired boost pressure.
Abstract:
PURPOSE: A device for securing braking stability of an ABS(Anti-lock Braking System) for a manual transmission vehicle is provided to secure proper operating performance of the ABS, by automatically operating a clutch, intercepting power transmission of an engine and a transmission, and preventing generation of engine brake force if an ABS operation condition on a low-friction road is decided. CONSTITUTION: A device for securing braking stability of an ABS for a manual transmission vehicle comprises an actuator connected to a clutch fork, to operate the clutch fork in a power-intercepting direction of a clutch; a brake pedal sensor; a wheel speed sensor; a deceleration sensor; and a controller receiving signals of the brake pedal sensor, the wheel speed sensor, and the deceleration sensor, and controlling the actuator. The actuator has an elongated hole to an operating rod, to fit the clutch fork. The actuator is a solenoid actuator formed to operate the clutch fork by the rectilinear reciprocation of the operating rod.