Engine speed control system and method
First Claim
1. Engine speed control apparatus comprising:
- governor means responsive to predetermined control input signals for controlling engine speed;
accelerator sensor means for producing an accelerator control input signal corresponding to the position of an accelerator;
mode selector means for selecting one of a governor mode and a throttle mode;
mode signaling means for producing one of a governor mode control input signal and a throttle mode control input signal corresponding to the mode selected by said mode selector means;
said governor means being responsive to said governor mode control input signal for permitting the selection of an upper limit of engine speed within a predetermined range of speeds and thereafter for controlling the engine speed to maintain said engine at said upper limit when said accelerator control input signal corresponds to a maximum position of an accelerator, and said governor means being responsive to said throttle mode control input signal for permitting the selection of a lower limit of engine speed within a predetermined range and for thereafter controlling the engine speed to maintain said engine at said lower limit of engine speed when said accelerator control input signal corresponds to a minimum position of an accelerator.
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Accused Products
Abstract
An engine speed control apparatus employs a governor responsive to predetermined control input signals for controlling engine speed. An accelerator sensor produces an accelerator control input signal corresponding to the position of an accelerator. A mode selector selects one of a governor mode and a throttle mode, and produces one of a governor mode control input signal and a throttle mode control input signal corresponding to the mode selected. The governor is responsive to the governor mode control input signal for permitting the selection of an upper limit of engine speed within a predetermined range of speeds and thereafter for controlling the engine speed to maintain the engine at this upper limit when the accelerator control signal corresponds to a maximum accelerator position. The governor is responsive to the throttle mode control input signal for permitting the selection of a lower limit of engine speed within a predetermined range and for thereafter controlling the engine speed to maintain the engine at this lower limit of engine speed when the accelerator control signal corresponds to a minimum accelerator position.
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Citations
21 Claims
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1. Engine speed control apparatus comprising:
- governor means responsive to predetermined control input signals for controlling engine speed;
accelerator sensor means for producing an accelerator control input signal corresponding to the position of an accelerator;
mode selector means for selecting one of a governor mode and a throttle mode;
mode signaling means for producing one of a governor mode control input signal and a throttle mode control input signal corresponding to the mode selected by said mode selector means;
said governor means being responsive to said governor mode control input signal for permitting the selection of an upper limit of engine speed within a predetermined range of speeds and thereafter for controlling the engine speed to maintain said engine at said upper limit when said accelerator control input signal corresponds to a maximum position of an accelerator, and said governor means being responsive to said throttle mode control input signal for permitting the selection of a lower limit of engine speed within a predetermined range and for thereafter controlling the engine speed to maintain said engine at said lower limit of engine speed when said accelerator control input signal corresponds to a minimum position of an accelerator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- governor means responsive to predetermined control input signals for controlling engine speed;
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18. A method of engine speed control comprising the steps of:
- producing an accelerator control input signal corresponding to the position of an accelerator;
selecting one of a governor mode and a throttle mode;
producing one of a governor control input signal and a throttle control input signal corresponding to the mode selected;
responding to said governor control input signal for permitting the selection of an upper limit of engine speed within a predetermined range of speeds and thereafter for controlling the engine speed to maintain said engine at said upper limit when said accelerator control input signal corresponds to a maximum position of an accelerator, and responding to said throttle control input signal for permitting the selection of a lower limit of engine speed within a predetermined range and for thereafter controlling the engine speed to maintain said engine at said lower limit of engine speed when said accelerator control input signal corresponds to a minimum position of an accelerator. - View Dependent Claims (19, 20, 21)
- producing an accelerator control input signal corresponding to the position of an accelerator;
Specification