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Class 74/336R - Speed responsive


Subclass of Class 74 - Machine element or mechanism
Definition: Transmissions, wherein the shifting is accomplished either
No. of patents: 415
Last issue date: 05/01/2012


1                      
NumberTitleIssue Date
8166843Shift transmission control device of vehicle, vehicle and method for controlling shift transmission in vehicle
A shift transmission control device of a vehicle includes a transmission, a clutch, a shift transmission controller, and a shift inhibition state detector. The shift transmission controller is configured to control the transmission and the clutch. The shift inhibiti...
05/01/2012
8047091Method for controlling an automatic vehicle transmission in order to reduce back-and-forth shifting
A method of controlling an automatic transmission of a motor vehicle having clutches controlled by an electronic control unit. A transmission rotational speed in an initial transmission stage is determined. If a first transmission shifting rotational speed is reache...
11/01/2011
7992458Utility vehicle having a drive motor and a shifting claw transmission with an electric motor
In a motor vehicle, in particular a utility vehicle, having a shifting claw transmission and an electric motor connected to a countershaft of the transmission to facilitate central synchronization for gear speed changes, a transmission controller is connected to the...
08/09/2011
7992459Shifting claw transmission and shifting method therefor
In a shifting claw transmission for a motor vehicle including a main shaft and a countershaft and an electric motor for rotating the countershaft or being rotated thereby with freely rotatable gear wheels supported on the counter shaft and engageable with the counte...
08/09/2011
7874226Transmission heater system and method
A method for heating a transmission is provided. The transmission has at least one solenoid valve that hydraulically actuates a valve. The method includes the steps of measuring a transmission temperature, determining whether the transmission temperature is greater ...
01/25/2011
7779714Surrogate engine speed signal for controlling a dual clutch powershift transmission
A method for launching a vehicle having an engine shaft, first and second transmission input shafts, first and second input clutches, a coupler, a power path, and an output, the method including engaging the coupler to connect the first input shaft and the first out...
08/24/2010
7597019Transmission operating apparatus for vehicle
A transmission operating apparatus for a vehicle includes a shift lever manipulable by a driver, and at least one counterforce applying unit which electrically applies a counterforce counteracting a shifting operation of the shift lever to the shift lever correspond...
10/06/2009
7597020Gear selection strategy for a dual clutch transmission
A method for controlling gear shifts in a multiple speed power transmission for a vehicle that includes a first clutch for transmitting power through a first power path producing a reverse gear, and a second clutch for transmitting power through a second power path ...
10/06/2009
7555967Shift control apparatus for automatic transmission
A shift control apparatus for an automatic transmission having an automatic shift mode for performing a shift operation by determining a gear ratio to be set according to a vehicle running condition and a manual shift mode for performing a shift operation instructed...
07/07/2009
7540211Gear shifting completion determining device and gear shifting completion determining method
The ECU executes a program including the step of setting a threshold value A to be compared with a stroke amount of an actuator for determining whether gear shifting has completed or not, taking no account of a deflection amount C of the hardware due to the shift lo...
06/02/2009
7490528Park inhibit assembly for an electric transmission range selection system
An electronic transmission range selection (ETRS) system for shifting a transmission range of a transmission includes an electro-mechanical park inhibit assembly that operates to disallow the ETRS system from shifting from an Out-of-Park mode to a Park mode under ce...
02/17/2009
7472616Step-by-step variable transmission and method for controlling the same
A method for controlling an automated step-by-step variable transmission which has a plurality of gear stages which set up a different transmission ratio in each case. The method comprises the steps: a) detecting whether a gear stage is to be engaged, b) detecting a...
01/06/2009
7469612Method for determining an engaged ratio in a gearbox
The invention relates to a method for determining the speed of a vehicle with the aid of sensors on board said vehicle, whereby the vehicle is moved by an engine (6) coupled to a gear box (8), wherein the speed is determined by multiplying the value of...
12/30/2008
7434488Transmission for tractor
A transmission for a tractor comprises a transmission case having an opening that opens to exterior of the transmission case and a speed change device that is housed in the transmission case. The transmission also includes a cover removably attached to the transmiss...
10/14/2008
7370551Gearshift operating device
To provide a small-sized and lightweight gearshift operating device that is capable of performing a gearshift operation in a short time at low power consumption, a guide slit having a plurality of slits 41 parallel with the shift fork shafts and a plurality o...
05/13/2008
7367923Apparatus and method for controlling transmission of straddle-type vehicle
A transmission control apparatus is provided for a straddle-type vehicle that has a clutch and a transmission with a dog clutch having a first gear and a second gear. The transmission control apparatus includes a clutch actuator configured to engage and disengage th...
05/06/2008
7350433Transmission control system
A transmission control system for maintaining good positioning performance even if a dynamic characteristic of a transmission is out of a predicted range. A sliding mode controller provided in a shift controller has two degrees of freedom and can independently speci...
04/01/2008
7349784Control method for automobile transmissions
A control method for automatic transmissions wherein a reverse motion condition in the neutral or drive ranges, caused by burning or the like in the operating devices of the automatic transmission, can be automatically detected to prevent an unwanted reverse motion ...
03/25/2008
7347118Process and device for preventing the engagement of an impermissible speed in an automated gearbox
A process for preventing the engagement of an impermissible speed in an automated gearbox with a gear-switching member, which can be moved along a gear-selection speed range and out of it into speed step ranges containing the following steps: acquiring the speed ste...
03/25/2008
7331897Active shift transmission, transmission control unit and automobile
The object of the invention is to provide a less expensive active transmission control system for an automobile, capable of disconnecting an engine, without increasing the number of dog clutches. In an active shift transmission, a second intermediate shaft is...
02/19/2008
7324885Shift through neutral control in an electrically variable transmission
A shift control for an electrically variable transmission shifts between modes through a neutral mode wherein the output is decoupled from the transmission. Normally, shifts between modes are accomplished synchronously through a duration of fixed-ratio operation. Ex...
01/29/2008
7319910Method and device for controlling a movement of a movable machine element of a machine tool or production machine
A method and device for controlling a movement of a movable machine element of a machine tool or production machine with at least two drive axles are disclosed. At least one mechanical characteristic frequency is determined for each drive axle of the machine, and th...
01/15/2008
7316288All terrain vehicle with multiple steering modes
Methods and apparatus for steering a vehicle are disclosed. A vehicle in accordance with an exemplary embodiment of the present invention is capable of operating in a first steering mode and a second steering mode. The vehicle may comprise an input device capable of...
01/08/2008
7311015Multi-step manual transmission for an internal combustion engine
A multistage transmission for an internal combustion engine has a disconnect-type clutch, a drive shaft and a driven shift on which engaged gear wheels are arranged to achieve different gear steps. Clutches actuated via shift forks are used to move the speed gears t...
12/25/2007
7311624Apparatus for controlling speed of a water pump
For enhancement of heating performance of a vehicle, operating speed of a water pump of an engine is varied in accordance with engine operation conditions, so a speed of a coolant temperature increase can be accelerated when needed. ...
12/25/2007
7302872Method of determining a shift gate position for a vehicle transmission and a shift gate position determining system for the same
At least one shift gate includes a stabilizing range for stabilizing an engagement between the engaging portion and the at least one shift gate. The system stops movement of the movable member by driving the actuator and determines a portion at the movable member as...
12/04/2007
7303057Parking device of vehicle
A parking device for vehicles in which when an engine is brought into a halt, a clutch is disconnected and the revolution of an input shaft of a transmission cannot be controlled by frictional force of the engine, the parking device includes a parking gear provided ...
12/04/2007
7299664Device for controlling motor in washing machine and method for controlling process of washing machine by using the same
Device for controlling a motor in a washing machine and a method for controlling a process of a washing machine by using the same, the device including a motor, a power source part for supplying a voltage to the motor, a plurality of torque varying parts parallel to...
11/27/2007
7290779Bicycle shift control apparatus that cancels a tentative shift
A bicycle shift control apparatus comprises a threshold value setting unit that sets a threshold value of a running condition for shifting a bicycle transmission, a decision unit that decides if a current running condition value passes the threshold value, and a ten...
11/06/2007
7278510Shifting system for an automobile automatic transmission
The invention is an automatic transmission shifting system for automobile, the automobile having a steering column assembly including a steering wheel at one end and steering column, and an electrical wire having first end terminating at the steering wheel and a sec...
10/09/2007
7278950Stage-geared gearbox for motor vehicles
A stage-geared gearbox for motor vehicles, includes an unsynchronized basic gearbox, at least one synchronized auxiliary gear and at least one control unit for controlling engagement and disengagement of the gears of the gearbox and also neutral position. In the gea...
10/09/2007
7276013Parallel shift transmission and method for controlling it
The invention relates to a parallel shift transmission having a drive unit and two partial transmissions, each connectable to the drive unit via a friction clutch and each having a plurality of gear ratio steps. ...
10/02/2007
7275455Automatic gear system
The present invention broadly comprises a method for the control of a gear engagement mechanism of an automated multiple-ratio transmission having at least one drive shaft and at least one output shaft, including assigning a synchronizer to at least one gear step, a...
10/02/2007
7269491Cross-checking processors for powertrain control systems using a dedicated serial data link
An engine management system for a vehicle includes engine and transmission control modules that are connected to a serial vehicle data bus. A dedicated serial data bus is connected to the transmission control module and the engine control module. The engine and the ...
09/11/2007
7255018Transmission with low shaft deflection
A transmission (1) having at least one transmission input shaft (4), at least one countershaft (5), one reverse gear shaft (30) and at last one transmission output shaft (6) in which, upon at least one transmission input shaft and ...
08/14/2007
7255019Method of detecting false neutral in an automated transmission system
A method and system for controlling downshifting in an automated mechanical transmission system (10) utilized on a vehicle. When an automatic power downshift from a currently engaged ratio (GR) is required, the engine acceleration (EA) is monitored and compar...
08/14/2007
7252622Transmission, and control system and control method for the transmission
When torque transmission through the transmitting torque variable mechanism (e.g., an assist clutch) is changed to torque transmission through a meshing gearing after the gearshift, a controlled variable per unit time when the transmitting torque variable mechanism ...
08/07/2007
7246534Double clutch transmission
Engine torque selectively inputted through first and second input shafts is received and changed selectively by first and second output devices respectively having first and second output shafts. A parking gear is disposed on one of the first and second output shaft...
07/24/2007
7246535Method for the recognition of the synchronization position and the end of the synchronization operation of an automated shiftable transmission
A method for recognition of the synchronization position and the end of the synchronization operation in an automated shiftable transmission with an electromotive shift actuator is disclosed, which is characterized in that the rotational speed of the shift actuator ...
07/24/2007
7243565Twin-clutch manual transmission
A twin-clutch manual transmission including: first and second input shafts provided with respective clutches; a counter shaft parallel to these input shafts; gear sets of an odd-numbered gear range group disposed between the rear end portion of the first input shaft...
07/17/2007
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