A vehicle control system which can ensure high reliability, real-time processing, and expandability with a simplified ECU configuration and a low cost by backing up an error through coordination in the entire system without increasing a degree of redundancy of individual controllers beyond the least necessary level. The vehicle control system comprises a sensor controller for taking in sensor signals indicating a status variable of a vehicle and an operation amount applied from a driver, a command controller for generating a control target value based on the sensor signals taken in by the sensor controller, and an actuator controller for receiving the control target value from the command controller and operating an actuator to control the vehicle, those three controller being interconnected via a network. The actuator controller includes a control target value generating unit for generating a control target value based on the sensor signals taken in by the sensor controller and received by the actuator controller via the network when the control target value generated by the command controller is abnormal, and controls the actuator in accordance with the control target value generated by the control target value generating unit.

Vehicle Control System

A multi-speed transmission has three planetary gear sets and six torque-transmitting mechanism packaged in various ones of five zones within a transmission cavity. Each planetary gear set has a ring gear member, a sun gear member and a carrier member that rotatably supports a plurality of pinion gears that intermesh with both the sun gear member and the ring gear member. Certain members are continuously connected for common rotation. Specifically, an interconnecting member continuously interconnects for common rotation the carrier member of the first planetary gear set, the sun gear member of the second planetary gear set and the ring gear member of the third planetary gear set. Additionally, the sun gear member of the first planetary gear set is grounded to the transmission casing via a radially-extending structural member.

Multi-speed transmission

A controllable selectable one-way clutch is provided for use within a hybrid transmission. The clutch comprises an outer and inner race, and a first and second selector plate. A transmission motor controller synchronizes the speeds of the races to facilitate application and release of the clutch, and a transmission controller communicates a signal to the clutch for re-positioning of the plates to apply and release the clutch. The clutch has three operational modes, including freewheeling and holding torque in one direction or both directions. A method is also provided for applying a selectable one-way clutch in a vehicle having a hybrid transmission with a motor controller and a transmission controller, including synchronizing the clutch speed using the motor controller, detecting the direction of the race speed difference, communicating the race speed difference to the transmission controller, and selecting between the clutch operational modes in response to the detected speed difference.

Selectable one-way clutch

The invention relates to a multi-stage transmission provided with an input shaft (3), which is connected to a shiftable front-mounted planet gear set (10), with an output shaft (4), which is connected to a shiftable main planet gear set (20), and with a number of shifting elements (A to F) whose selective closing enables the shifting of at least six forward speeds without range shift. An output element of the front-mounted planet gear set (10) can be connected to a first input element of the main planet gear set (20) via a first shifting element (A) and can be connected to a second input element of the main planet gear set (20) via a second shifting element (B). The input shaft (3) can be connected to a third input element of the main planet gear set (20) via a fifth shifting element (E). Preferably, a sun gear (11) of the front-mounted planet gear set (10) can be fixed via a sixth shifting element (F) mounted on the side of the front-mounted planet gear set (10) facing away from the main planet gear set (20). The front-mounted planet gear set (10) is provided in the form of a Plus gearing having inner and outer planet gears (12, 13) whose webs (15, 16) are interconnected.

Multi-stage transmission

A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, providing an operator torque request, determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the current transmission operating range state and engine state based upon the preferability factors and the operator torque request.

Method and apparatus for maximum and minimum output torque performance by selection of hybrid range state and input speed for a hybrid powertrain system

The transmission i.e. planetary transmission (14), has torque transmitting mechanisms (80, 82, 84, 85, 56) e.g. clutch, for interconnecting a sun gear (22), a ring gear (24) and a planet carrier assembly (26) of a planetary gear set (20) with sun gear (32), a ring gear (34) and a planet carrier assembly (36) of a planetary gear set (30). The mechanisms are engaged in combinations of three to establish eight forward speed ratios and one reverse speed ratio between an input (17) and an output (19). One of the sun gear, ring gear and assembly of one set is connected with a stationary member.

Multi-speed transmission i.e. planetary transmission, for use in e.g. powertrain, has torque-transmitting devices engaged in combinations of two to establish eight forward speed ratios and one reverse speed ratio between input and output

The transmission (10) has a set of planetary gear sets (14-20) provided with sun gears (14A, 16A, 18A, 20A), planet carrier members (14B, 16B, 18B, 20B) and ring gears (14C, 16C, 18C, 20B). A set of interconnecting members continuously interconnects the sun gears, carrier members and ring gears of the planetary gear sets. A set of torque transmitting mechanisms such as clutches (26-32) and brakes (34, 36), is selectively engageable to establish ten forward speed ratios and reverse speed ratio between an input member and an output member.

Ten speed transmission, has torque transmitting mechanisms selectively engageable to establish ten forward speed ratios and reverse speed ratio between input member and output member

A pair of rotary pistons each have a drive shaft connectable therewith through respective one-way mechanisms. Each of the clutch mechanisms has a wrapped spring member surrounding the shaft and a linearly moveable piston to effect an operative connection between the wrapped spring and the shaft. Each linearly moveable piston controls fluid flow to one of the rotary pistons such that the linearly moveable piston will enforce actuation of the wrapped spring prior to the introduction of fluid pressure at the respective rotary piston.

Rotary piston actuator with selective one-way wrapped spring clutches

Mehrere Schaltschienen werden durch eine Handsteuerstange betatigt, um wahlweise einen oder mehrere Synchronmechanismen zu betatigen. Die Steuerstange wird wahrend der Gangauswahl winklig und geradlinig bewegt. Jeder Synchronmechanismus kann zwei oder mehrere Fahrubersetzungsverhaltnisse in einem Planetengetriebe steuern. Zumindest zwei der Schienen sind durch einen Richtungsumkehrmechanismus miteinander verbunden, um eine bestandige Bewegung der Schienen ungeachtet der Bewegungsrichtung der Steuerstange zuzulassen.

Schaltmechanismus für ein Planeten-Handschaltgetriebe

A centering spring apparatus in a shift control mechanism includes a plurality of brackets providing stationary ground members for spring members and a shift control lever, which is operable to pick up the springs from the grounded portion to impose a centering force on the shift lever. These springs are disposed such that three different centering forces can be occasioned upon the shifting of the lever from one neutral position toward other neutral positions.

Scott H. Wittkopp

Papers

Multi-speed transmission i.e. planetary transmission, for use in e.g. powertrain, has torque-transmitting devices engaged in combinations of two to establish eight forward speed ratios and one reverse speed ratio between input and output

Ten speed transmission, has torque transmitting mechanisms selectively engageable to establish ten forward speed ratios and reverse speed ratio between input member and output member

Rotary piston actuator with selective one-way wrapped spring clutches

Schaltmechanismus für ein Planeten-Handschaltgetriebe

Centering spring apparatus for a transmission shift control mechanism