Provided is a hydraulic control device, in which a linear solenoid valve (SLC3) is constituted in a normal open type so that it outputs an application pressure for a clutch (C-3) even if it is turned OFF. On the basis of the application pressure of a clutch (C-2), on the other hand, a first clutch apply relay valve (121) outputs a first preparatory oil pressure at first to third forward speed stages, and outputs a second preparatory oil pressure at fourth to sixth forward speed stages. A second clutch apply relay valve (122) feeds hydraulic servos (41 and 42) at a normal time with the controlpressures of linear solenoid valves (SLC1 and SLC2), respectively, and the hydraulic servos (41 and 42) at an all-off fail time with the first preparatory oil pressure (PDC1) or the second preparatory oil pressure (PDC2), so that it applies the clutch (C-1) or the clutch (C-2) thereby to achieve a forward third speed stage or a forward fifth speed stage. In short, the hydraulic control device canbe made compact and can cut costs, although it can achieve a low-speed stage or a high-speed stage at the all off-fail time.

Hydraulic control device for automatic transmission

A driving/braking force manipulation control input of a k-th wheel, which denotes one or more specific wheels among a plurality of wheels of a vehicle, is determined such that a required condition concerning a relationship among a road surface reaction force that may act from a road surface on the k-th wheel on the basis of the detected values or estimated values of a side slip angle and a friction characteristic of the k-th wheel, a feedback control input related to the driving/braking force of the k-th wheel for bringing a difference between a state amount of the vehicle and a reference state amount close to zero, a driving/braking force feedforward control input based on a drive manipulated variable supplied by a driver of the vehicle, and a k-th wheel driving/braking force manipulation control input is satisfied. This arrangement makes it possible to properly control a motion of an actual vehicle to a desired motion while properly considering the characteristics of a road surface reaction force acting from a road surface on a wheel.

Vehicle Control Device

In a vehicle drive device, a response to a range change request, during which the drive wheels are rotated in a low or high range, can be smoothly and quickly completed without using a synchronous engaging mechanism. When the range change is requested when the drive wheels are rotated in the low range or in the high range, the control devices disengage a clutch sleeve from a currently engaged gear piece so as to establish a neutral range, and control an output rotational speed of the motor generator such that a difference between an input rotational speed and an output rotational speed of the transmission mechanism is set to be zero, or be equal to or less than a predetermined value. After that, the control devices cause a connection processor to slide the clutch sleeve to be connected to a connection target gear piece.

Vehicle drive device

A dual clutch transmission includes a group of odd-numbered speed drive trains, including at least a first speed drive train to be driven for setting a first speed serving as the lowest speed; a first clutch to be engaged for driving any one of the odd-numbered speed drive trains including the first speed drive train; a group of even-numbered speed drive trains, including at least a second speed drive train to be driven for setting a second speed serving as the second lowest speed; a second clutch to be engaged for driving any one of the even-numbered speed drive trains including the second speed drive train; an automatic speed control system for selecting one of all the odd-and-even numbered speed drive trains to be driven, and for selecting either the first or second clutch to be engaged for driving the selected speed drive train in correspondence to a traveling speed of a vehicle equipped with the dual clutch transmission; and a manual selection device for selecting any one of all the odd-and-even numbered speed drive trains, including the second speed drive train and excluding the first speed drive train, as a starting-and-stopping speed drive train to be driven when the vehicle starts and immediately before the vehicle stops.

Dual clutch transmission

PROBLEM TO BE SOLVED: To provide, in a power transmission device equipped with a differential mechanism, first and second electric motors and an automatic transmission section (a mechanical power transmission section), a control device preventing the second electric motor from rotating at a high speed when power transmission is interrupted at the automatic transmission section during traveling by an engine and a traveling load on the engine is suddenly reduced. SOLUTION: A rotation state determination means 92 determines whether or not the second electric motor M2 is in a high-speed rotation state in which it rotates at a high speed exceeding a high-speed rotation determination value LMT1 or in a high-speed rotation predictable state in which it is predicted to reach high-speed rotation exceeding the high-speed rotation determination value LMT1. A rotation inhibition means 94 performs engine rotation inhibition control for inhibiting engine rotation speed N E to an engine rotation speed limit value LMTE or lower when the second electric motor M2 is in the high-speed rotation state or in the high-speed rotation predictable state. The second electric motor M2 is thus prevented from rotating at a high speed by an engine rotation speed rise. COPYRIGHT: (C)2009,JPO&INPIT

Control device of power transmission device for vehicle

PROBLEM TO BE SOLVED: To provide a hydraulic control device that surely detects a solenoid abnormality while reducing the number of liquid-pressure sensors SOLUTION: The hydraulic control device is provided with: a hydraulic source; a hydraulic device that is operated by an oil pressure supplied from the hydraulic source; a control valve that is serially arranged between the hydraulic source and the hydraulic device; and a control means that drivingly controls the control valve The control valve is composed of an upstream-side control valve that is connected to the hydraulic source and a downstream-side control valve that is connected to the hydraulic device The liquid-pressure sensor is provided on the hydraulic device side of the downstream-side control valve The control means is composed so that a command pressure against the upstream-side control valve is set lower than that of against the downstream-side control valve in order to detect an abnormality of the upstream-side control valve by the liquid-pressure sensor COPYRIGHT: (C)2008,JPO&INPIT

Hydraulic control device

The hydraulic pressure control apparatus includes an upstream control valve, a downstream control valve, a hydraulic pressure sensor, and a controller The upstream control valve is provided between a hydraulic pressure source and a hydraulic pressure device The downstream control valve is disposed between the upstream control valve and the hydraulic pressure device The hydraulic pressure sensor is configured and arranged to detect the hydraulic pressure on a downstream side of the downstream control valve The controller is configured to control the upstream control valve and the downstream control valve based on an upstream pressure command value and a downstream pressure command value, respectively The controller is further configured to detect an abnormality in the upstream control valve based on the hydraulic pressure detected by the hydraulic pressure sensor when the downstream pressure command value is set to be equal to or greater than the upstream pressure command value

Hydraulic pressure control apparatus

There is provided a shift control device for an automated manual transmission having power transmission lines equipped with respective start clutches and gears. The shift control device includes clutch actuation mechanisms and a transmission shift controller that causes the clutch actuation mechanisms to regulate the clutch engagement forces applied to the start clutches so as to perform clutch changeover upon gear selection for a desired gear range in response to a transmission shift command. Each of the clutch actuation mechanisms has primary and secondary clutch engagement force regulation units. The transmission shift controller outputs a control signal to the primary and secondary clutch engagement force regulation units of each clutch actuation mechanism under the clutch changeover control so that either the primary or secondary clutch engagement force regulation unit of each clutch actuation mechanism operates to regulate a corresponding one of the clutch engagement forces according to the control signal.

Shift control device and method for automated manual transmission

An automated manual transmission to which a shift position sensor is practically applied has a hydraulic shift actuator that includes a cylinder and a piston that moves in the cylinder in accordance with a speed change operation of the transmission. The shift position sensor comprises a magnet mounted in the piston to move therewith, and a magnaflux detector mounted to a fixed member of the transmission near the hydraulic shift actuator to detect a magnaflux produced by the magnet. The cylinder is so constructed as to cover the magnet even when the piston is subjected to a stroke in the cylinder.

Shift position sensor of automated manual transmission

A position detecting device is basically provided with a control section, a detecting section and a setting section. The control section repeatedly controls a gear connecting mechanism in a vehicle transmission to selectively perform a gear connecting operation to obtain a selected gear range and a gear releasing operation to release the selected gear range after the gear connecting operation has been performed. The detecting section detects a position of a connecting member of the gear connecting mechanism after the gear connecting operation has been performed. The setting section sets a shift completion position at which connecting of the selected gear range is determined to be completed based on a plurality of positions of the connecting member of the gear connecting mechanism detected by the detecting section.

Futamura Makoto

Papers

Hydraulic control device

Hydraulic pressure control apparatus

Shift control device and method for automated manual transmission

Shift position sensor of automated manual transmission

Position detecting device for transmission gear connecting mechanism and transmission having position detecting device