摘要:
A method and an arrangement for open-loop control and/or closed-loop control of an operating variable of an internal combustion engine is suggested with a transfer element fixing the relationship between input and output variables in the form of a characteristic curve or characteristic field such as an electrically actuable actuator, which directly or indirectly influences the operating variable of the engine of a motor vehicle and which fixes the relationship between the driving and operating variable or a variable influencing this operating variable in the form of a characteristic curve or a characteristic field. The transfer element or the characteristic curve or the characteristic field is subjected to changes. By adapting the characteristic curve or the computation instruction representing the characteristic curve or the characteristic field, these are adapted to these changes. This adaptation is performed in such a manner that at least one region of the characteristic curve or of the characteristic field is rotated about a pregiven point which lies outside of the characteristic curve and is specific to the actuator or to the engine. This point is adaptable in the context of a long-term adaptation.
摘要:
An apparatus 14 for adapting the characteristic of an idling adjuster has a release means 15 which allows adaptation only when the sign of a speed control deviation .DELTA.n corresponds to the sign of an air-quantity control deviation .DELTA.Q.This guarantees that the adaptation cannot counteract the speed control either as a result of still insufficient adaptation or by shunt signals from the air-quantity meter 11.
摘要:
A process and a device for air proportioning during idling or overrun mode of operation in an internal-combustion engine are provided. During idling, the internal-combustion engine is regulated to a nominal speed by means of a PI controller (203, 204) and a preliminary air rate control value is determined as a function of temperature, gear position and air-conditioning state of the vehicle. At the same time, the actual air mass or air intake rate (60) is measured and the difference value of the actual air intake rate and the preliminary air-rate control value is stored in a store (304). During overrun, the air-mass throughput of the internal-combustion engine is regulated to this stored value. Furthermore, the control receives a series of auxiliary variables which make it easier to carry out the control as a function of the particular operating mode.
摘要:
The invention is directed to a method for detecting combustion misfires in a multi-cylinder internal combustion engine, the method comprising the steps of: determining the rough-running values for the engine individual to the cylinders; determining a quantity for the level of a subset of the rough-running values; forming a reference value by logically coupling the quantity with an offset; and, comparing the rough-running values to the reference value and evaluating a passthrough of the reference value as a misfire.
摘要:
Disclosed is an electronic system for computing control magnitudes for a control system of an internal combustion engine. The control magnitudes are derived by computation from measured auxiliary parameters. The control magnitude such as suction pipe pressure is computed from its relationship with the flow rate of air mass, or throttle valve position and rotary speed. Atmospheric pressure is computed from the air mass flow, rotary speed and throttle valve position or from the cross-section of the channel by-passing the throttle valve and from the supplied air mass. The computation arrangement can be either analog or digital.
摘要:
A steer-by-wire steering system comprised of an electronically regulated steering positioner mounted to the steering gear of the front axle or to both front wheels of a vehicle together with an electronic steering regulator and a feedback actuator. A sensor senses the driver's selected direction from the steering wheel. Road feedback can be relayed to the driver through a feedback actuator via the steering wheel. The loss of road feel caused by the absence of the steering column, which normally strongly influences the driver's directional wish, is recreated by the feedback actuator.
摘要:
The speed to be measured, either engine speed or vehicle (drive wheel) speed, is measured by a tachogenerator which trips a timer to provide a series of measurements. When the system is in use, a driver can store the actual speed at a selected moment as the desired speed. From a linearized model of vehicle speed or engine speed response to acceleration or deceleration of the engine by displacement of a control member, system parameters a.sub.1 and b.sub.1 are derived. The actual speed signal is multiplied by a.sub.1 and added algebraically (to produce a difference signal) to the desired speed signal, with the resulting signal then being multiplied by another constant derived from the system parameter b.sub.1 by reference to weighting factors p and q of a cost minimizing equation relating to the relative significance of obtaining a small control deviation and of limiting or increasing the amplitude of the control signal. An output signal is then provided by the second multiplying stage. The system can be constituted in an analog fashion or it may operate digitally by means of a microprocessor. Smoothing of the input and output signals may be provided by low-pass filtering in the analog case and by providing a moving average with the preceding value in the digital case. This type of regulation, which may be referred to as cyclic or as single-step control, assures an aperiodic run-in characteristic and is stable in all speed ranges.
摘要:
The invention is directed to a method and an arrangement for checking the operability of an actuator for the air supply and especially in combination with an idle control. By a retard shift of the ignition time point, the operability of the actuator is determined when the engine speed remains essentially constant and the engine load increases.
摘要:
The invention is directed to a control system for an internal combustion engine with reference to air throughput, rotational speed and lambda. In this control system, a decoupling device is provided between open loop and closed loop control signals which act with different speeds. An ignition signal is influenced in dependence upon a lambda-dependent signal via at least one dead time member. In this way, phases having unfavorable opposing influence on control branches of different reaction durations are reduced.
摘要:
Wheel speed (V.sub.R) and braking pressure (P.sub.B) applied to a wheel are continuously measured and utilized to estimated values from a mathematical system model, to obtain the physical values: coefficient of friction (.mu.), vehicle speed (V.sub.F), slope of a slip curve (d.mu./dS), slip (S), and coefficient of friction of a stationary-rotary brake couple structure. At least one of the physical values so obtained, and preferably the coefficient of friction (.mu.), vehicle speed, and slope of wheel slip curve are used to control braking pressure being applied to the wheel. Braking pressure can be controlled for example for braking in accordance with coefficient of friction and slope of the friction-slip curve, for example to operate the wheel just before the coefficient of friction drops as the wheel begins to slip. Spinning of a wheel can be avoided by controlling the braking pressure to be below slippage value.
摘要翻译:连续测量车轮速度(VR)和制动压力(PB),并将其用于数学系统模型的估计值,以获得物理值:摩擦系数(μ),车速(VF),斜率 滑动曲线(d mu / dS),滑差(S)和固定旋转制动器联结结构的摩擦系数。 使用如此获得的物理值,优选摩擦系数(μ),车辆速度和车轮滑动曲线的斜率中的至少一个来控制施加到车轮的制动压力。 制动压力可以例如根据摩擦系数和摩擦滑动曲线的斜率进行制动来控制,例如在摩擦系数随着车轮开始滑动而下降之前操作车轮。 可以通过将制动压力控制在滑差值以下来避免车轮旋转。