Control for vehicle provided with continuously variable speed system power transmission

Claim 2

A control for a vehicle provided with: (a) a continuously variable speed system power transmission which utilizes a continuously variable transmission comprising: (i) a belt trained over a plurality of disks, at least one of said plurality of disks being movable to control the speed of the belt, and (ii) a pressing force controlling means for controlling the force with which the belt presses against said disks in relation to acceleration fuel increments; (b) an engine having a combustion chamber, said engine being operatively connected to said continuously variable transmission; (c) a fuel injector operatively connected to said engine; (d) an accelerator pedal operatively connected to said engine to control engine speed; (e) an air-flow rate detecting means operatively connected to said fuel injector; (f) a line pressure generating valve; (g) a hydraulic pressure means operatively connected to said line pressure generating valve; (h) a flow controlling valve operatively connected to said line pressure generating valve and to said pressing force controlling means; (i) an electronic control unit having inputs from said engine and from said air-flow rate detecting means and outputs to said fuel injector, said flow controlling valve, and said line pressure generating valve; (j) a torque sensor operatively connected to said engine and having an input to said electronic control unit; (k) a rate of acceleration detecting means operatively connected to said accelerator pedal and having an input to said electronic control unit; (l) a first angle sensor operatively connected to a first one of said plurality of disks mounted on a first shaft and having an input to said electronic control unit; and (m) a second angle sensor operatively connected to a second one of said plurality of disks mounted on a second shaft and having an input to said electronic control unit, said control comprising: (n) a detecting means for detecting acceleration and deceleration intended by a driver; (o) a computation means for figuring out desired air-fuel ratios in said combustion chamber and the desired speed ratios of said continuously variable transmission in relation to the output of said detecting means; (p) a speed ratio controlling means for controlling the speed ratio of said continuously variable transmission such that the speed ratio of the continuously variable transmission becomes the desired speed ratio; and (q) an air-fuel ratio controlling means for controlling the air-fuel ratio such that the air-fuel ratio in the combustion chamber becomes the desired air-fuel ratio, the air-fuel ratio being lowered together with the speed ratio of said continuously variable transmission during transient periods in which the input side rotational speed of said engine (Nin) does not equal the desired input side rotational speed of said engine (Nin*), the amount by which the air-fuel ratio is lowered being a function of the rotational speed of the engine.

Claim 3

A control as recited in claim 1 wherein said at least one of said plurality of disks which is movable to control the speed of the belt is the output side disk of the continuously variable transmission and it is moved by means of a hydraulic cylinder, said pressing force controlling means being adapted to control line pressure sent to said hydraulic cylinder.

Claim 4

A control for a vehicle provided with; (a) a continuously variable speed system power transmission which utilizes a continously variable transmission comprising: (i) a belt trained over a plurality of disks, at least one of said plurality of disks being movable to control the speed of the belt, and (ii) a pressing force controlling means for controlling the force with which the belt presses against said disks in relation to acceleration fuel increments; (b) an engine having a combustion chamber, said engine being operatively connected to said continuously variable transmission; (c) a fuel injector operatively connected to said engine; (d) an accelerator pedal operatively connected to said engine to control engine speed; (e) an air-flow rate detecting means operatively connected to said fuel injector; (f) a line pressure generating valve; (g) a hydraulic pressure means operatively connected to said line pressure generating valve; (h) a flow controlling valve operatively connected to said line pressure generating valve and to said pressing force controlling means; (i) an electronic control unit having inputs from said engine and from said air-flow rate detecting means and outputs to said fuel injector, said flow controlling valve, and said line pressure generating valve; (j) a torque sensor operatively connected to said engine and having an input to said electronic control unit; (k) a rate of acceleration detecting means operatively connected to said accelerator pedal and having an input to said electronic control unit; (l) a first angle sensor operatively connected to a first one of said plurality of disks mounted on a first shaft and having an input to said electronic control unit; and (m) a second angle sensor operatively connected to a second one of said plurality of disks mounted on a second shaft and having an input to said electronic control unit, said control comprising: (n) a detecting means for detecting acceleration and deceleration intended by a driver; (o) a computation means for figuring out desired air-fuel ratios in said combustion chamber and the desired speed ratios of said continuously variable transmission in relation to the output of said detecting means; (p) a speed ratio controlling means for controlling the speed ratio of said continuously variable transmission such that the speed ratio of the continuously variable transmission becomes the desired speed ratio; and (q) an air-fuel ratio controlling means for controlling the air-fuel ratio such that the air-fuel ratio in the combustion chamber becomes the desired air-fuel ratio, the air-fuel ratio being lowered together with the speed ratio of said continuously variable transmission during transient periods in which the input side rotational speed of said engine (Nin) does not equal the desired input side rotational speed of said engine (Nin*), the amount by which the air-fuel ratio is lowered being a function of the amount by which said accelerator pedal is pressed.

Claim 5

A control for a vehicle provided with; (a) a continuously variable speed system power transmission which utilizes a continously variable transmission comprising: (i) a belt trained over a plurality of disks, at least one of said plurality of disks being movable to control the speed of the belt, and (ii) a pressing force controlling means for controlling the force with which the belt presses against said disks in relation to acceleration fuel increments; (b) an engine having a combustion chamber, said engine being operatively connected to said continuously variable transmission; (c) a fuel injector operatively connected to said engine; (d) an accelerator pedal operatively connected to said engine to control engine speed; (e) an air-flow rate detecting means operatively connected to said fuel injector; (f) a line pressure generating valve; (g) a hydraulic pressure means operatively connected to said line pressure generating valve; (h) a flow controlling valve operatively connected to said line pressure generating valve and to said pressing force controlling means; (i) an electronic control unit having inputs from said engine and from said air-flow rate detecting means and outputs to said fuel injector, said flow controlling valve, and said line pressure generating valve; (j) a torque sensor operatively connected to said engine and having an input to said electronic control unit; (k) a rate of acceleration detecting means operatively connected to said accelerator pedal and having an input to said electronic control unit; (l) a first angle sensor operatively connected to a first one of said plurality of disks mounted on a first shaft and having an input to said electronic control unit; and (m) a second angle sensor operatively connected to a second one of said plurality of disks mounted on a second shaft and having an input to said electronic control unit, said control comprising: (n) a detecting means for detecting acceleration and deceleration intended by a driver; (o) a computation means for figuring out desired air-fuel ratios in said combustion chamber and the desired speed ratios of said continuously variable transmission in relation to the output of said detecting means; (p) a speed ratio controlling means for controlling the speed ratio of said continuously variable transmission such that the speed ratio of the continuously variable transmission becomes the desired speed ratio; and (q) an air-fuel ratio controlling means for controlling the air-fuel ratio such that the air-fuel ratio in the combustion chamber becomes the desired air-fuel ratio, the air-fuel ratio being lowered together with the speed ratio of said continuously variable transmission during transient periods in which the input side rotational speed of said engine (Nin) does not equal the desired input side rotational speed of said engine (Nin*), the amount by which the air-fuel ratio is lowered being a function of the amount by which said accelerator pedal is pressed.

Claim 6

A control as recited in claim 3 wherein said at least one of said plurality of disks which is movable to control the speed of the belt is the output side disk of the continuously variable transmission and it is moved by means of a hydraulic cylinder, said pressing force controlling means being adapted to control line pressure sent to said hydraulic cylinder.