Abstract: A control apparatus for a vehicle that includes: drive wheels; an engine; a flywheel damper connected to the engine; at least one inertial body provided between the flywheel damper and the drive wheels; and a clutch for connecting and disconnecting between the flywheel damper and the at least one inertial body. In a process of reduction of a rotational speed of the engine for stopping the engine, the control apparatus keeps the clutch engaged until the rotational speed has passed through a first resonance speed range, and causes the clutch to be released before the rotational speed reaches a second resonance speed range. The first resonance speed range is a range of the rotational speed in which resonance is generated with the clutch being released. The second resonance speed range is a range of the rotational speed in which the resonance is generated with the clutch being engaged.

Abstract: A control apparatus for a vehicle that includes: drive wheels; an engine; a flywheel damper connected to the engine; at least one inertial body provided between the flywheel damper and the drive wheels; and a clutch for connecting and disconnecting between the flywheel damper and the at least one inertial body. In a process of reduction of a rotational speed of the engine for stopping the engine, the control apparatus keeps the clutch engaged until the rotational speed has passed through a first resonance speed range, and causes the clutch to be released before the rotational speed reaches a second resonance speed range. The first resonance speed range is a range of the rotational speed in which resonance is generated with the clutch being released. The second resonance speed range is a range of the rotational speed in which the resonance is generated with the clutch being engaged.

Abstract: A vehicle control apparatus which includes an engine, an automatic transmission, and drive wheels transmitted with the power of the engine through the automatic transmission, the automatic transmission including a torque converter connected with the engine, a transmission mechanism connected with the torque converter, the torque converter having a pump impeller connected with the engine, and a turbine runner connected with the transmission mechanism, the vehicle control apparatus for a vehicle further including: an input shaft rotational speed sensor that detects the rotational speed Nt of the turbine runner, and a control unit to control the engine to have the rotational speed Ne of the engine raised when a determination condition in which the rotational speed Nt of the turbine runner is not raised even within a standard time T1 lapsed after the engine is started is established.

Abstract: A vehicle control apparatus which includes an engine, an automatic transmission, and drive wheels transmitted with the power of the engine through the automatic transmission, the automatic transmission including a torque converter connected with the engine, a transmission mechanism connected with the torque converter, the torque converter having a pump impeller connected with the engine, and a turbine runner connected with the transmission mechanism, the vehicle control apparatus for a vehicle further including: an input shaft rotational speed sensor that detects the rotational speed Nt of the turbine runner, and a control unit to control the engine to have the rotational speed Ne of the engine raised when a determination condition in which the rotational speed Nt of the turbine runner is not raised even within a standard time T1 lapsed after the engine is started is established.

Abstract: A transmission includes a case having an internal space; a first partition wall which is provided in the case and forms a boundary between a first chamber which is arranged in the case and houses a rotating object, and a second chamber which is arranged in the case, is connected to the first chamber, and maintains equal pressure between the first chamber and outside air; a second partition wall which is provided in the case and forms a boundary between the second chamber and a third chamber which is arranged in the case and stores fluid below the second chamber; and a third partition wall which is provided in the case and forms a boundary between the first chamber and the third chamber. A first hole and a second hole are formed in that order from the first chamber side in the second partition wall.

Abstract: When a vehicle stops in a driving range such as a D-range at low oil temperature such as the initial stage of starting the engine, air-mixed operating oil may be supplied from the second oil passage into the torque converter. In this case, at the release of the lockup clutch in which the second line oil pressure is supplied from the second oil passage to the lockup clutch, the third oil passage is shut off (blocked) to inhibit the discharge of the operating oil. Therefore, regardless of larger pipe passage resistance due to higher viscosity, the operating oil in the torque converter is certainly discharged from the first oil passage through the cooler oil passage to the oil cooler and bubbles in the torque converter is reduced in association of the discharge of the operating oil.

Abstract: An ECU executes a program including the steps of: determining whether or not the conditions for execution of low-temperature neutral control: the temperature of the automatic transmission hydraulic fluid is at most a threshold value; the shift position is D or R position; the vehicle speed is zero; and the brake is ON and the vehicle is stopped, are continuously satisfied for a period of time represented by a threshold value; executing the neutral control when the conditions for execution of low-temperature neutral control are continuously satisfied for at least the period represented by the threshold value; returning from the neutral control when the conditions for execution of low-temperature neutral control are not satisfied; and restricting the throttle opening position in returning from the neutral control.

Abstract: An oil suction device for an automatic transmission includes: an oil pan that receives oil supplied to various portions of the automatic transmission and returned to the oil pan and reserves the received oil therein; an oil strainer located over the oil pan; a suction port drawing in the oil reserved in the oil pan; and an elastic wall provided selectively between a portion of the oil pan that receives a relatively small amount of the oil returned to the oil pan and the suction port, the elastic wall extending from a bottom surface of the oil pan and reaching a lower surface of the oil strainer to interrupt a flow of oil.

Abstract: A hydraulic control device for a lockup clutch prevents stagnation and accumulation of air bubbles in a torque converter when a vehicle is at a stop at low oil temperature, preventing impairment of vehicle drive performance caused by insufficient transmission torque at the time of start of the vehicle. It occurs sometimes that air-mixed hydraulic oil is supplied into a torque converter from a second oil path when a vehicle is at a stop, with a transmission set to a drive range such as a D range, at a low oil temperature in a time, for example, immediately after an engine is started. In such a case, when a lockup clutch is disengaged, in which a second line hydraulic pressure is supplied from the second oil path to the lockup clutch, a third oil path is interrupted (closed) to prohibit discharge of the hydraulic oil. As a result, despite large pipe path resistance due to low viscosity, the hydraulic oil in the torque converter is reliably discharged from a first oil path to an oil cooler via a cooler oil path.

Abstract: A transmission includes a case having an internal space; a first partition wall which is provided in the case and forms a boundary between a first chamber which is arranged in the case and houses a rotating object, and a second chamber which is arranged in the case, is connected to the first chamber, and maintains equal pressure between the first chamber and outside air; a second partition wall which is provided in the case and forms a boundary between the second chamber and a third chamber which is arranged in the case and stores fluid below the second chamber; and a third partition wall which is provided in the case and forms a boundary between the first chamber and the third chamber. A first hole and a second hole are formed in that order from the first chamber side in the second partition wall.

Abstract: An ECU executes a program including the steps of: determining whether or not the conditions for execution of low-temperature neutral control: the temperature of the automatic transmission hydraulic fluid is at most a threshold value; the shift position is D or R position; the vehicle speed is zero; and the brake is ON and the vehicle is stopped, are continuously satisfied for a period of time represented by a threshold value; executing the neutral control when the conditions for execution of low-temperature neutral control are continuously satisfied for at least the period represented by the threshold value; returning from the neutral control when the conditions for execution of low-temperature neutral control are not satisfied; and restricting the throttle opening position in returning from the neutral control.

Abstract: An oil suction device for an automatic transmission includes: an oil pan that receives oil supplied to various portions of the automatic transmission and returned to the oil pan and reserves the received oil therein; an oil strainer located over the oil pan; a suction port drawing in the oil reserved in the oil pan; and an elastic wall provided selectively between a portion of the oil pan that receives a relatively small amount of the oil returned to the oil pan and the suction port, the elastic wall extending from a bottom surface of the oil pan and reaching a lower surface of the oil strainer to interrupt a flow of oil.

Abstract: A power transmission system for a vehicle is provided, including: a housing that can reserve oil therein; and a rotational member rotatably supported within the housing, with a surface of the rotational member being partly contactable with a surface of the oil reserved in the housing, in which the surface of the rotational member partly contactable with the oil surface includes a non-contact surface that is not in contact with any power transmission members, the non-contact surface having an oil repellent section. When the surface of the rotational member contacts the oil surface, the oil repellent section repels the oil quickly. Therefore, the amount of oil, which adheres to and rotates with the rotational member agitating the oil, decreases. This reduces oil heat generation and rotational resistance to the rotational member.

Abstract: The present invention provides a ball screw device for linear movement, which moves a working body by using a single of a plurality of ball screw shafts and ball screw nuts. In the ball screw device, a plurality of ball screw nuts are engaged threadedly with the same ball screw shaft. Also, one of the ball screw nuts on each ball screw shaft is attached to the working body via a fixed flange, the single fixed flange or one of the fixed flanges is provided with a load sensor, and other ball screw nuts serve as a fluid pressure supporting mechanism using a cylinder and a piston. A fluid pressure is controlled so that the support force of the fluid pressure supporting mechanism is equal to the pushing force detected by the load sensor. By this configuration, a large load can be distributed evenly to the ball screw nuts.

Abstract: The present invention provides a ball screw device for linear movement, which moves a working body by using a single of a plurality of ball screw shafts and ball screw nuts. In the ball screw device, a plurality of ball screw nuts are engaged threadedly with the same ball screw shaft. Also, one of the ball screw nuts on each ball screw shaft is attached to the working body via a fixed flange, the single fixed flange or one of the fixed flanges is provided with a load sensor, and other ball screw nuts serve as a fluid pressure supporting mechanism using a cylinder and a piston. A fluid pressure is controlled so that the support force of the fluid pressure supporting mechanism is equal to the pushing force detected by the load sensor. By this configuration, a large load can be distributed evenly to the ball screw nuts.

Abstract: A motor-driven injection driving apparatus for an injection molding machine comprises a fixed frame 4 having an injection cylinder 8, first and second injection drive motors 7, and first and second ball screw shafts 10; first and second power transmission mechanisms 12 for transmitting the rotational forces of the first and second injection drive motors 7 to the first and second ball screw shafts 10, respectively, while reducing the speed; and a movable frame 6 provided with first and second ball screw nuts 11 threaded on the first and second ball screw shafts 10, respectively, and a screw drive motor 14 and capable of being moved in the direction of injection together with an injection screw 9. In the injection process, the movable frame 6 is moved so that a tensile force acts on the first and second ball screw shafts 10.