Device for controlling the position of an element which controls the fuel-air mixture
First Claim
1. In a device for controlling the position of an element which controls the air-fuel mixture of an internal combustion engine of an automotive vehicle, the device having a desired value transmitter for signaling a desired value of speed, the desired value transmitter producing an electric desired value signal which can be fed to an electronic control unit by which there can be controlled a setting member for displacing the element which controls the air-fuel mixture into a position corresponding to the desired value signal, the improvement whereincontroller means are provided between the desired value transmitter and the electronic control unit, said improvement further comprisingspeed transmitter means for detecting and converting the speed of the vehicle into an electric speed signal;
- means for sensing the amplitude of said speed signal and the amplitude of said desired value signal;
switching means coupled to said sensing means and responsive to the amplitude of the desired value signal and to the amplitude of the electric speed signal for selectively switching the desired value signal between said controller means and said control unit; and
whereinsaid controller means, upon displacement of the desired value transmitter from an end position thereof corresponding to a speed of travel of zero, limiting the change in the value of the desired value signal per unit of time, below a given speed of travel, to a maximum value.
1 Assignment
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Accused Products
Abstract
The present invention relates to a device for controlling the position of an element of an automobile internal combustion engine which controls the fuel-air mixture, comprising a desired-value transmitter 2 for producing an electric desired-value signal which can be fed to a electronic control unit 14. A setting member 19 for displacing a throttle valve 20 into a position corresponding to the position of the desired-value transmitter 2 can be controlled by the electronic control unit 14. In order to make smooth starting possible, a controller unit 15, by which the control of the setting member 19 is regulated upon the starting, is arranged between the desired-value transmitter 2 and the electronic control unit 14.
15 Citations
16 Claims
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1. In a device for controlling the position of an element which controls the air-fuel mixture of an internal combustion engine of an automotive vehicle, the device having a desired value transmitter for signaling a desired value of speed, the desired value transmitter producing an electric desired value signal which can be fed to an electronic control unit by which there can be controlled a setting member for displacing the element which controls the air-fuel mixture into a position corresponding to the desired value signal, the improvement wherein
controller means are provided between the desired value transmitter and the electronic control unit, said improvement further comprising speed transmitter means for detecting and converting the speed of the vehicle into an electric speed signal; -
means for sensing the amplitude of said speed signal and the amplitude of said desired value signal; switching means coupled to said sensing means and responsive to the amplitude of the desired value signal and to the amplitude of the electric speed signal for selectively switching the desired value signal between said controller means and said control unit; and
whereinsaid controller means, upon displacement of the desired value transmitter from an end position thereof corresponding to a speed of travel of zero, limiting the change in the value of the desired value signal per unit of time, below a given speed of travel, to a maximum value. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11)
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7. In a device for controlling the position of an element which controls the air-fuel mixture of an internal combustion engine of an automotive vehicle, the device having a desired value transmitter for signaling a desired value of speed, the desired value transmitter producing an electric desired value signal which can be fed to an electronic control unit by which there can be controlled a setting member for displacing the element which controls the air-fuel mixture into a position corresponding to the desired value signal, the improvement wherein
controller means are provided between the desired value transmitter and the electronic control unit, said controller means, upon displacement of the desired value transmitter from an end position thereof corresponding to a speed of travel of zero, limiting the change in the value of the desired value signal per unit of time, below a given speed of travel, to a maximum value, and wherein said controller means has an integrating means for limiting the change in the value of the desired value signal per unit of time.
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12. In a device for controlling the position of an element which controls the air-fuel mixture of an internal combustion engine of an automotive vehicle, the device having a desired value transmitter for signaling a desired value of speed, the desired value transmitter producing an electric desired value signal which can be fed to an electronic control unit by which there can be controlled a setting member for displacing the element which controls the air-fuel mixture into a position corresponding to the desired value signal, the improvement wherein
controller means are provided between the desired value transmitter and the electronic control unit, said controller means, upon displacement of the desired value transmitter from an end position thereof corresponding to a speed of travel of zero, limiting the change in the value of the desired value signal per unit of time, below a given speed of travel, to a maximum value; - said improvement further comprising
speed transmitter means for detecting and converting the speed of the vehicle into an electric speed signal, means for coupling the speed signal to the controller means, said coupling means further comprising a speed comparator, and wherein the speed signal is fed to one input of the speed comparator and a given speed signal corresponding to the given speed of travel is fed to a second input of the speed comparator, the comparator giving off an output signal if the speed signal is larger than the given speed signal; and
wherein said coupling means further comprises a desired value comparator, and whereinthe desired value signal is fed to one input of the desired value comparator and an electric constant signal corresponding to a maximum position of the desired value transmitter at which maximum position the speed of travel is zero is fed to a second input thereof, an output signal being given off by the desired value comparator when the desired value signal is larger than the constant signal. - View Dependent Claims (13, 14, 15, 16)
- said improvement further comprising
Specification