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7289892 |
Power train inspection system, power train inspected by power train inspection system, and control unit for power train
The present invention provides inspection of a transmission with higher precision and in a shorter period of time. Before a finished A/T is inspected, a V/B ASSY and an ECU are inspected together...
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7210338 |
Valve testing device having integrated purge circuit and method of valve testing
A valve testing device and method for determining whether a fluid control valve, such as an automatic transmission valve, is operating acceptably. The device and method of the present invention...
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7197915 |
System and method for the setting of an engine torque and a gearbox ratio in a vehicle with a continuously variable gearbox
The invention relates to a system for inputting a motor torque and a transmission ratio in a vehicle having a continuously variable transmission ( 3 ) with means ( 202 ) for determining a desired...
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7188516 |
Friction testing apparatus
A testing apparatus for measuring the friction characteristics between two components in rolling or sliding contact with one another is disclosed herein. The testing apparatus includes a traction...
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7082814 |
Method and apparatus for testing fluid flow and flushing a transmission cooler
A method and apparatus for testing fluid flow and flushing a transmission cooler. In a preferred embodiment of the invention, the apparatus is designed to test fluid flow through a transmission...
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7076997 |
Apparatus for testing automatic transmission solenoid valves
The present invention is directed to an apparatus for testing a plurality of on/off solenoid valves and a plurality of proportional solenoid valves of an automotive transmission. The apparatus...
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7072762 |
Evaluation system for vehicle operating conditions and evaluation method thereof
The evaluation system for vehicle operating conditions comprises an automatic control device ( 10, 27 ) for setting target vehicle operating conditions and controlling the vehicle so as to achieve...
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6976388 |
Diagnostic method for a torque control of an electrically variable transmission
A condition of impaired speed and torque control of a parallel electrically variable transmission due to factors beyond nominal modeling and estimation errors is diagnosed under low speed...
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6931924 |
Method for testing the function of an electrohydraulically controlled automatic transmission
The method for testing the function of an electrohydraulically controlled automatic transmission upon a testing stand by simulation of a vehicle operation provides that the output shaft of the...
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6895835 |
Method of improving performance in a motor-driven system
A method is disclosed for improving the performance attainable in a motor-driven system of the type characterized by a single motor driving an output shaft operatively coupled to a motor-driven...
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6880393 |
Detecting clutch slippage to measure drive line torque for clutch control during power shifts
A method for controlling clutch pressures during power shifts involving detecting clutch slippage, utilizing individual pressure control. In the shift, the pressure in the off-going clutch is...
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6837216 |
Electronic throttle control system
An electronic throttle control system includes an electronic control unit that performs failsafe control for cases where failure of throttle valve is detected, and stores failure information about...
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6820472 |
Test rig and test system for testing a power transmission device
A test rig for testing a power transmission device, having an input shaft, an output shaft and a casing, may include a first assembly having a coupling shaft that is connected by a rigid and...
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6813550 |
Fuel-efficient vehicle and control method thereof
The vehicle comprises an engine ( 1 ), a transmission ( 8 ) connected to the engine ( 1 ), a detecting device ( 23 ) for detecting the current vehicle speed, a detecting device ( 26 ) for detecting...
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6807852 |
Test bench for testing a power transmission device and a test system comprising such a test bench provided with a power transmission device
A test bench for testing a power transmission device may include, a first assembly that can be connected to an output shaft of the power transmission device to be tested, a second assembly that can...
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6679109 |
Acoustic recognition of variator slip of a continuously variable transmission
Within the scope is a method for detecting the variator slip in continuously variable transmission (CVT transmission). The tribologic slip is detected by monitoring a rotating variator according to...
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6655198 |
Learning method for an automatic transmission of a vehicle and a system thereof
In order to enable a more rapid shift and to prevent tie-up from occurring when a down-shift occurs during an up-shift, an amount of overrun produced during the down-shift is detected, and a...
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6655197 |
Automatic transmission fluid characteristic monitoring system employed for repair/maintenance and during operation of a land motor vehicle
The present invention is directed towards an apparatus for monitoring and displaying characteristic values of certain parameters of the automatic transmission fluid in the automatic transmission...
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6626031 |
Method of detecting oscillations
Oscillations of a variable quantity, particularly of the rpm rate of an input shaft of a cone-pulley transmission in the power train of a vehicle, are detected by monitoring the rate of change of...
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6604412 |
Sensor diagnostics
A method for obtaining an accurate cylinder air-charge estimate is presented. First, a sensor-based powertrain torque estimate is obtained. Next, a torque converter-based powertrain torque estimate...
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6568256 |
System and method for controlling an automatic four-wheel drive transfer case which prevents excessive slippage
A method and system 10 for controlling a transfer case 32 of a four-wheel drive vehicle 12 . The vehicle 12 includes a front driveshaft 22 and a rear driveshaft 26 . Transfer case control...
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6553815 |
Method and apparatus for permitting stable operation of a vehicle at an extremely low vehicle speed
The method and apparatus according to the invention permits stable driving operation of a motor vehicle at an extremely low vehicle speed by means of an electronic control unit. The...
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6526816 |
Transmission gear life monitor system
An integral gear life monitor system and method for determining gear use and damage is disclosed. The system includes a first and second sensors for measuring the rotational speed and torque of a...
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6523399 |
Control unit for a motor vehicle
A control unit has a control circuit and a pressure sensor connected to the control circuit. The pressure sensor measures the hydraulic pressure in a transmission or the induction-pipe vacuum of an...
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6492900 |
Rotary switch test sensor
A sensor device is used for sensing position of a movable component. The sensor device can be applied to multiple applications. For example, proper alignment between a shifter spline and a shifter...
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6481274 |
Position sensor setting and testing method
A method is provided for testing and setting the position of a position sensor for a transmission. A shift control shaft is provided, and the position sensor is positioned to align with the shift...
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6419609 |
Torque adaptation device for an engine moment model
A torque adaptation device is provided having a computation unit which determines an engine moment with the help of an engine moment model from performance characteristics and/or sensor input...
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6412341 |
Transmission fluid conditioning apparatus and method for facilitating conduction of transmission coolant flow test
A transmission fluid conditioning apparatus and method for facilitating the conduction of a transmission coolant flow test includes the provision of a fluid receptacle in the form of an open ended...
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6405587 |
System and method of controlling the coastdown of a vehicle
A method of controlling the coastdown of a vehicle is provided. A base engine speed reference is determined. A speed of the vehicle is sensed, and a target engine speed is generated from the base...
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6393943 |
Electronic-hydraulic control unit for an automatic transmission for vehicles
The invention is based on an electronic-hydraulic control unit ( 1 ) for an automatic transmission of a motor vehicle wherein the control unit ( 1 ) has one hydraulic unit ( 2 ) with hydraulic...
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6393904 |
Stress test rig for helicopter transmissions
The inventive stress test rig for helicopter transmission comprises a first test rig transmission ( 16 ) which is driven by a motor ( 38 ) and forms a closed stress circuit via shafts ( 4, 14, 54...
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6357289 |
Automatic transmission control system having fail-safe function
An automatic transmission control system having a fail-safe function includes an automatic transmission control unit which prestores a normal state of ON-OFF settings of engaging elements and...
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6345529 |
Method of gear changing in a motor vehicle
At the time of automatic gear changing without declutching in a mechanical stepped gearbox ( 6 ) in a motor vehicle, the speed of the gearbox output shaft ( 36 ) is detected and any speed change...
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6343504 |
Apparatus and methods for testing transmissions
This invention pertains to transmission testers, and specifically to automatic transmission testers, and methods for their use. The headstock is mounted for pivotation about a vertical axis. A...
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6311552 |
Gear position sensor
A gear position sensor arrangement to indicate which gear ratio has been engaged in a change speed mechanism. The arrangement includes an indicating formation (19) which is connected with a portion...
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6223592 |
Independent control of transmission-side and engine-side retarding devices during ratio changes
A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system include independently controlling at least one engine-side retarding...
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6155948 |
Method of determining the parameters of an automatic transmission
A method for determining parameters of an electrohydraulically controlled automatic transmission (4) by, on a final test bench, successively initiating transmission gearshifts. During gear changes...
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6138065 |
System and method for monitoring a performance characteristic using temperature and lubrication level of vehicle components
A method and system for providing enhanced diagnostic ability for monitoring vehicle performance characteristics includes utilizing a combination of temperature and lubrication level information. A...
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6116214 |
Throttle valve controller
The throttle valve controller 1 includes a failure detecting device 11 for detecting failures in the first and second accelerator sensors 2 and 3 based on the first input signal VAPS1 outputted...
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6112584 |
Magnichanical sensor
A system and method are provided for detecting the presence of a snap ring in a bearing assembly of a transmission system. A magnetic field is generated and a switch is positioned within the...
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6101440 |
Controller for an automatic motor vehicle transmission
A control device for an automatic motor vehicle transmission has electrohydraulically actuated gearshift elements which increase the smoothness of shifting during a shifting operation, especially a...
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6038918 |
Instrument for testing automatic transmission fluid control devices
A test instrument used by mechanics who trouble-shoot or who rebuild automatic transmissions for automobiles, truck and other conveyances, or who repair automatic transmission solenoids and...
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5995887 |
Apparatus and method for determining a failure of an automatic transmission fluid temperature sensor
A method and apparatus are provided to determine a failure of an automatic transmission temperature sensor in an automobile. The apparatus detects a start-up of the vehicle. A sensor detects the...
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5939621 |
Fluid leak tester for torque converter
A testing mechanism for detecting fluid leaks in a torque converter utilizing a seal which closes a passage through the torque converter hub to the interior of the housing of the torque converter....
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5936166 |
Input torque detecting system for an automotive transmission
An input torque detecting system of an automotive transmission. The transmission comprises a torque convertor having a pump impeller directly connected to a crankshaft of an engine, a turbine...
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5847272 |
Function testing device for an actuator system such as a automatic friction clutch used with a motor vehicle gearbox
To be able to verify the function of the actuator system of an automatic clutch or of an automatic transmission of a motor vehicle as a function of the current conditions, including while the motor...
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5835876 |
Torque converter clutch solenoid functional test
A method and system for testing the functionality of a solenoid used to change the apply state of a torque converter clutch in a vehicle having an electronic control unit and a driveline system...
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5777211 |
Method to determine the remaining useful life of automatic transmission fluid
A method of determining the remaining useful life of automatic transmission fluid used in an automatic transmission or transaxle is provided. A multiplicity of vehicles having the same type of...
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5734322 |
Communication circuit trouble checking apparatus
An apparatus for checking a trouble in a communication circuit connected between engine and transmission control units. A check signal is produced at uniform intervals of time. The check signal is...
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5726353 |
System for detecting torque of automatic vehicle transmission and controlling the same based on detected torque
The torque detection system for a continuously variable transmission for a vehicle having a dual-mass flywheel connecting an output of an engine mounted on the vehicle to the transmission and a...
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