 Method and apparatus for controlling thrust in a gas turbine engine |
| We claim: 1. Apparatus for controlling thrust of a gas turbine engine of the type having a ... |
|
| Control system for gas turbine engine |
| In one form of my invention, I provide, in combination with a gas turbine engine having first drive ... |
|
| System for adjusting radial clearance between rotor and stator elements |
| OF THE PREFERRED EMBODIMENTS A central portion of a turbofan type gas turbine engine is ... |
|
| Rank filter using neural newwork |
| It is an object of the present invention to provide a rank filter using the concept of a neural ... |
|
| Recycling garbage separator |
| It is an object of the present invention to overcome these and other drawbacks of the prior art. It ... |
|
| Method and apparatus for implementing binary multiplication using booth type multiplication |
| New floating point circuitry according to the present invention represents substantial advances ... |
|
| Telephone isolation system |
| OF THE INVENTION The switching module SDM1 illustrated in FIG. 1 is located between a pair of ... |
|
| System for accessing and testing subscriber loops |
| 1. THE MECHANIZED LOOP TESTING (MLT) ARCHITECTURE The overriding architectural consideration ... |
|
| Multi-channel, covert, non-line-of-sight UV communication |
| The present invention is directing to providing an apparatus for omnidirectionally communicating, ... |
|
| Multiline transmission line test receptacle with provision for testing each line |
| With reference now to the drawings, one embodiment of the multiline telephone test receptacle is ... |
|
|
Apparatus for controlling continuously variable transmission
| Details |
Inventors: Osanai, Akinori; Niwa, Takao; Gono, Takeshi;
Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP)
Primary Examiner: Braun; Leslie
Assistant Examiner: Novais; David
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
A continuously variable transmission (CVT) used in a vehicle is controlled such that an actual engine speed Ne is equalized to a desired engine speed Ne'. A reference engine speed Ner is defined to be nearly equal to and less than Ne'. When Ne<Ner, or Ne>Ne', the speed ratio e of the CVT is allowed to be changed, while the change is inhibited when Ner.ltoreq.Ne<Ne'. |
|
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS In FIG.
1, a CVT 10 is provided with an input shaft 12 and an output shaft 14 parallel to each other.
The input shaft 12 is provided coaxially with a crankshaft 18 of an engine 16 and connected to the crankshaft 18 through a clutch 20 input side pulleys 22a, 22b are provided opposed to each other, one input side pulley 22a being provided on the input shaft 12 to be moved axially as a movable pulley and fixed rotationally and the other input side pulley 22b being fixed to the input shaft 12 as a fixed pulley.
Similarly, output side pulleys 24a, 24b are provided opposed to each other, one output side pulley 24a being fixed to the output shaft 14 as a fixed pulley and the other output side pulley 24b being provided on the output shaft 14 to be moved axially as a movable pulley and fixed rotationally.
The opposed surfaces of the input and output side pulleys 22a, 22b and 24a, 24b are formed tapered and a belt 26 having an equilateral trapezoidal section is trained over the input and output side pulleys 22a, 22b and 24a, 24b.
An oil pump 28 sends oil in an oil reservoir 30 to a pressure regulating valve 32.
The pressure regulating valve 32 controls line pressure in an oil path 36 by varying the escaping amount of oil to a drain 34, and the line pressure in the oil path 36 is sent to a hydraulic cylinder and a flow controlling valve 38 of the output side pulley 24b.
The flow controlling valve 38 controls oil flow supplied from the oil path 36 to an oil path 40 connected to the hydraulic cylinder of the input side disk 22a and oil flow drained from the oil path 40 to the drain 34.
Press forces of the input and output side pulleys 22a, 22b and 24a, 24b against the belt 26 is controlled by hydraulic pressure in the input and output side hydraulic cylinders to vary the engaging radii of the belt 26 on the tapered surfaces of the input and output side pulleys 22a, 22b and 24a, 24b in relation to the press force so that the speed ratio e of the CVT 10 (=Nout/Nin, where Nout is the rotational speed of the output shaft 14 and Nin is the rotational speed of the input shaft 12, in this embodiment, Nin=engine speed Ne) is varied
|
| Related patents |
|
|
Hydraulic apparatus for a continuously variable transmission
The present invention was made in view of the foregoing background and to overcome the foregoing drawbacks. It is accordingly an object of this invention to provide a ...
|
|
|
Control device in continuously variable transmission system for vehicle
The present invention has as its object the provision of a control device in a CVT for a vehicle, wherein, necessity for a driver to operate a shift range is eliminated, ...
|
|
|
Vehicle engine control
We claim: 1. Apparatus for regulating a motor drive unit for a motor vehicle having an accelerator pedal, a brake pedal, a heat engine with a fuel feed and a ...
|
|
|
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***
Description:...
|
|
|
Control circuit for a motor driven automatic valve
I claim: 1. A control circuit for a motor driven automatic valve, comprising relay means having contacts controlling the connection of the motor to determine the ...
|
|
|
Apparatus for controlling continuously variable transmission
An object of the present invention is to provide an apparatus for controlling a continuously variable transmission (CVT) which is advantageous both in a specific fuel ...
|
|
|
Computer-controlled machine tool
According to the invention, there is provided a control system for controlling the position of a rotating tool acting on a workpiece, the system comprising: first motor ...
|
|
|
CNC turning machine
This invention relates generally to turning machines and specifically to a new and unique CNC turning machine which is adapted for complex turning of parts such as ...
|
|
|
Optical projector for transparencies and opaques
OF THE INVENTION Three major problems must be solved when an opaque mode is to be combined with a transparency mode in an overhead projector. The first is that of ...
|
|
|
Portable searchlight
I claim: 1. A portable searchlight having a reflector housing, a casing which conforms substantially to at least three circular, cylindrical, batteries positioned ...
|
|
|
Navigation and GPS 
