Abstract:
A workload calculation apparatus and method for an internal combustion engine, and an engine control unit are provided for accurately calculating a workload parameter indicative of the workload of the internal combustion engine. The workload calculation apparatus of the internal combustion engine ignition, which calculates the workload parameter indicative of the workload of the internal combustion engine, sets a first correlation function indicative of an integral of the product of volume data indicating a change state of the volume of the combustion chamber and a reference signal having a predetermined frequency k; generates the reference signal; detects in-cylinder pressure change amount data indicative of the amount of change in the pressure in the combustion chamber; calculates, on the basis of the generated reference signal and the detected in-cylinder pressure change amount data, a second correlation function indicative of an integral of the product of the reference signal and the in-cylinder pressure change amount data; and calculates the workload parameter on the basis of the first and second correlation functions.
Abstract:
A control apparatus is provided for restraining fluctuations in the output due to disturbance and the like to achieve high stability and control accuracy for the output of a control object. The control apparatus calculates a virtual interference input applied to the control object in order to generate a virtual interfering force for holding the detected output of the control object at a predetermined value. The control apparatus assumes the control object applied with the virtual interference input as an enlarged control object, and calculates a virtual control input applied to the enlarged control object based on a predetermined response specifying control algorithm such that the output of the enlarged control object converges to a set target value.
Abstract:
A drive system includes an output shaft of an engine connected to a sun gear of a planetary gear assembly. An electric motor is connected, via gears, to a carrier rotatably supporting a planetary pinion gear that rotates around the outer circumference of the sun gear while rotating on its axis in engagement with the sun gear. An input shaft of a STEPTRONIC™ transmission is connected to a ring gear that rotates in engagement with the planetary pinion gear. The drive system further includes an engine clutch directly coupling the output shaft of the engine to the ring gear, a ring gear brake that regulates the rotation of the ring gear, and a torque converter clutch and a torque converter for transmitting the driving force of the electric motor to an output shaft of the STEPTRONIC™ transmission.
Abstract:
The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the plant so that an output of the plant converges to a desired value. The input to the plant is determined to include a value obtained by multiplying the estimated disturbance by a predetermined gain. Since estimated disturbance is reflected in the input to the plant, control having robustness against disturbance is implemented. The controller may comprise a state predictor. The state predictor predicts the output of the plant based on the estimated disturbance and dead time included in the plant. The control unit determined the input to the plant so that the predicted output converges to a desired value. Since the state predictor allows for the dead time, the accuracy of the control is improved. The estimated disturbance is reflected in the predicted output, an error between the predicted output and an actual output of the plant is removed.
Abstract:
A controller for a contact mechanism for preventing a lack of a pressing force applied from a contacting member to a contacted member when determining a control input to an actuator moving the contacting member by a position control. The controller sets a target position of the contacting member, grasps an actual position of the contacting member, determines a control input to the actuator (so as to increase an output of the actuator along with an increase in a difference between the target position and the actual position of the contacting member to eliminate the difference), and detects that the contacting member contacts the contacted member.
Abstract:
A controller for a plant that can compensate for non-linear property and reduce oscillation of output of a controlled object even when the controlled object has high non-linear property is provided. The present invention provides a controller for a plant that uses PWM algorithm. The device calculates provisional control input for controlling output of the plant at a target value, and divides the provisional control input into a plurality of components. The controller PWM-modulates at least one of the plurality of components, and sums the PWM-modulated component and other components to produce a control input to the plant. The controller minimizes variations in input while maintaining the ability of PWM modulation to compensate for non-linear property of the plant.
Abstract:
A control system which is capable of compensating for and suppressing the influence of a periodic disturbance on a controlled object more quickly, even when the controlled object is subjected to the periodic disturbance the amplitude of which periodically changes, thereby enhancing the stability and the accuracy of control. The control system includes an ECU. The ECU calculates disturbance compensation values for compensating for a periodic disturbance by searching maps and tables, in timing of generation of each pulse of a CRK signal. The ECU calculates control inputs at a predetermined control period, with predetermined control algorithms, according to the disturbance compensation values read in at the control period, respectively.
Abstract:
An intake air amount control system for an internal combustion engine, which controls respective amounts of intake air drawn into four cylinders #1 to #4, independently of each other, by variable inter-intake cam phase mechanisms 80, identifies intake air amount variation coefficients Φ#i, based on a model [equation (43)] defining a relationship between an estimated value Gth_est of a TH passing intake air amount and a plurality of simulation values Gcyl_OS#i, such that the estimated value Gth_est becomes equal to the TH passing intake air amount, calculates a target inter-intake cam phase θssi#i_cmd, on a cylinder-by-cylinder basis, according to the identified intake air amount variation coefficients Φ#i (step 81), and calculates control input DUTY_ssi#2 to #4 to the variable inter-intake cam phase mechanisms 80 according to the target inter-intake cam phases θssi#i_cmd (step 75).
Abstract translation:用于内燃机的进气量控制系统通过可变进气内凸轮相位机构80独立地控制吸入四个气缸#1至#4的进气的量,识别进气量变化系数 Phi#i基于限定通过进气量TH的估计值Gth_est与多个模拟值Gcyl_OS#i之间的关系的模型[等式(43)],使得估计值Gth_est变为等于TH 通过进气量,根据识别的进气量变化系数Phi#i,在逐个气缸的基础上计算目标进气内凸轮相位t i i scmd(步骤81),并计算控制输入DUTY_ssi#2 到#4到根据目标进气间凸轮相位的可变进气腔内凸轮相位机构80(步骤75)。
Abstract:
A control apparatus that is capable of maintaining both the control resolution and the control accuracy at respective high levels even when at least one of the nonlinearity and the frequency characteristic of a controlled object varies. A control apparatus 1 that control a cam phase Cain by a phase control input Ucain includes two controllers 102 and 103. The two-degree-of-freedom response-specifying controller 102 calculates a follow-up control input Rsld as a value for causing the cam phase to follow a target cam phase Cain_camd. The DSM controller 103 calculates a phase control input Ucain by modulating the follow-up control input Rsld, and in the calculation, the repetition period at which the phase control input Ucain is calculated is selected from two repetition periods ΔT1 and ΔT2 according to engine speed NE, a cam phase Cain, and a valve lift Liftin.
Abstract:
The present invention provides a control apparatus for a plant, which can suppress excessive correction for a spiky disturbance being applied and maintain a good controllability, when controlling the plant, which is a controlled object, with the self-tuning regulator. A detected equivalent ratio KACT is input to a high-pass filter 33, and a high-pass filter output KACTHP is input to a parameter adjusting mechanism 42. The parameter adjusting mechanism 42 calculates a corrected updating vector (KID·dθ(k)) by multiplying an updating component dθ of a model parameter vector by a correction coefficient KID, and adds the corrected updating vector to a preceding value θ(k−1) of the model parameter vector, to thereby calculate a present value θ(k). The correction coefficient KID is changed from “1.0” to a value near “0” upon detection of the spiky response where an absolute value of the high-pass filter output KACTHP increases.