摘要:
In the case of a return from an idle stop control in which an engine is automatically stopped, a hydraulic pressure is so supplied that a low brake is set in a completely engaged state and a high clutch is set in a slip interlock state where the high clutch is not completely engaged.
摘要:
A control device of a lock-up clutch of a torque converter interposed between a transmission and engine used with a vehicle, is disclosed. The control device has a sensor which detects an input rotation speed to the torque converter, a sensor which detects an output rotation speed from the torque converter, a differential pressure control device which controls the differential pressure applied to the lock-up clutch, and a controller which sets a target slip rotation speed of the torque converter; calculates a real slip rotation speed which is a difference between the detected input rotation speed and the detected output rotation speed; and performs feedback control to determine the differential pressure applied to the lock-up clutch so that the real slip rotation speed coincides with the target slip rotation speed. The controller is programmed to: set the target slip rotation speed to a first target slip rotation speed determined from a vehicle running parameter; perform feedback control so that the real slip rotation speed coincides with the first target slip rotation speed; change over the first target slip rotation speed to a second target slip rotation speed according to an error between the first target slip rotation speed and the real slip rotation speed; after changing over, and perform feedback control so that the real slip rotation speed coincides with the second target slip rotation speed; wherein the first and second target slip rotation speeds are different functions of time.
摘要:
A lock-up clutch control apparatus for controlling a lock-up clutch (6) provided in a torque converter (5) installed between an engine (3) and a transmission (4), is disclosed. The lock-up clutch control apparatus has a differential pressure generator (7,8) which engages, causes a slip of or disengages the lock-up clutch by adjusting the differential pressure supplied to the lock-up clutch (6); a sensor (11/15) for detecting a rotational speed of the engine; a sensor (16) for detecting an input rotational speed to the transmission; and a controller (1). The controller (1) conducts proportional integration control by using a command signal to the differential pressure generator (7,8), so that an actual slip rotational speed, which is the difference between the engine rotational speed (Np) and input rotational speed (Ni) to the transmission, becomes a target slip rotational speed (Nt). The controller is programmed to conduct integration accumulating the difference (ΔN) between the target slip rotational speed (Nt) and the actual slip rotational speed (SN); to determine whether the accumulated integrated value (I) is equal to or higher than a predetermined integration value (It); and to stop the integration when the accumulated integration value (I) is equal to or higher than the predetermined integration value (It).
摘要:
A lock-up clutch control device, which controls a lock-up clutch (6) installed in a torque converter (5) interposed between an engine (3) and a transmission (4) used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device (7,8) which engages or disengages the lock-up clutch by adjusting a differential pressure supplied to the lock-up clutch, a sensor (13) which detects a vehicle speed, and a controller. The controller is programmed to: determine whether or not the vehicle speed is equal to or larger than a first threshold value (V1) corresponding to a lock-up ON vehicle speed; command the differential pressure generating device to engage the lock-up clutch, when the vehicle speed is equal to or larger than the first threshold value (V1); determine whether or not the vehicle speed has reached a second threshold value (V2) larger than the first threshold value (V1); set a lock-up OFF threshold value (V3/V4) which depends on whether the vehicle speed has reached the second threshold value (V2); and command the differential pressure generating device to disengage the lock-up clutch, when the vehicle speed is equal to or less than the lock-up OFF threshold value.
摘要:
A lock-up clutch control device controls a lock-up clutch (6) provided in a torque converter (5) which is mounted between the engine (3) and transmission (4) provided in a vehicle. The lock-up clutch control device switches the state of the torque converter (5) between a converter state and a lock-up state by controlling a differential pressure supplied to the lock-up clutch. The lock-up clutch control device includes a sensor (13, 19) for detecting a rise of a vehicle speed; a differential pressure generator (7, 8) which generates the differential pressure supplied to the lock-up clutch; and a controller (1). The controller is programmed to command the differential pressure generator (7, 8) to lock the lock-up clutch (6) when the vehicle speed exceeds a predetermined low vehicle speed (V1), after the vehicle is started; subsequently monitor the rise of the vehicle speed; and command the differential pressure generator (7, 8) to unlock the lock-up clutch when the monitored rise of the vehicle speed is lower than a preset value (Vss/αs).
摘要:
A lock-up clutch control device controls a lock-up clutch (6) provided in a torque converter (5) which is mounted between the engine (3) and transmission (4) provided in a vehicle. The lock-up clutch control device switches between a converter state and a lock-up state of the torque converter by controlling a differential pressure supplied to the lock-up clutch. The lock-up clutch control device includes a sensor (13) which detects a vehicle speed; a differential pressure generator (7, 8) which generates the differential pressure supplied to the lock-up clutch in response to a differential pressure command value (Pt); and a controller (1). The controller (1) is programmed to calculate a first differential pressure command value (Pu) which decreases at a predetermined rate of change, after the detected vehicle speed becomes a first predetermined vehicle speed (Vss); calculate a second differential pressure command value (Plim) which is smaller than the first differential pressure command value; and set the differential pressure command value (Pt) for the differential pressure generator (7, 8) to the second differential pressure command value (Plim), before the detected vehicle speed becomes a second predetermined vehicle speed (Vsu) which is lower than the first predetermined vehicle speed. The controller (1) is further programmed to set the differential pressure command value (Pt) for the differential pressure generator (7, 8) to a value at which the lock-up clutch is immediately released, when the detected vehicle speed becomes the second predetermined vehicle speed (Vsu).
摘要:
Gas displacement volumes of a high temperature chamber and a middle temperature chamber in a high temperature portion of a hot gas machine are different. Alternatively, a gas displacement volume of a low temperature chamber and a middle temperature chamber in a low temperature portion are different.
摘要:
In this invention, a back end portion of a preceding sheet bar and a front end of a succeeding sheet bar are cut in a transfer line at an entrance side of a finish rolling mill so that at least both side edge regions of these sheet bars are contacted with each other at a butted contact state thereof and a gap is formed between both end portions and then portions to be joined int he preceding and succeeding sheet bars are locally heated and pushed to join them while gradually enlarging a joining area, whereby the required time is largely reduced as compared with the conventional technique and also it is attempted to miniaturize the heating apparatus and shorten the length of the apparatus.
摘要:
In a television receiver including a digital circuit processing an input video signal in a digital mode, a clock generating circuit applies a system clock signal to the digital circuit, and comprises a phase comparator to which a horizontal synchronizing signal is applied, a low-pass filter connected to the phase comparator, a voltage controlled oscillator connected to the low-pass filter to generate the system clock signal, a first frequency divider dividing the frequency of the system clock signal generated from the voltage controlled oscillator to generate a horizontal deflection drive pulse signal, and a second frequency divider connected to the phase comparator. The phase comparator, the low-pass filter, the voltage controlled oscillator, the first frequency divider and the second frequency divider constitute a single PLL circuit, and the system clock signal and the horizontal deflection drive pulse signal are respectively generated from the PLL circuit.