CRUISE CONTROL SYSTEM WITH IMPROVED FUEL ECONOMY
First Claim
Patent Images
1. A cruise control system for a vehicle, comprising:
- a speed setpoint module that stores a speed setpoint;
a speed variance module that stores a predetermined speed variance; and
a shift inhibiting module that receives a transmission downshift request, that prevents the requested transmission downshift when a vehicle speed is less than a set speed and greater than the set speed minus the predetermined speed variance and that allows the requested transmission downshift when the vehicle speed is less than the set speed minus the predetermined speed variance.
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Abstract
A cruise control system for a vehicle includes a speed setpoint module that stores a speed setpoint. A speed variance module stores a predetermined speed variance. The predetermined speed variance can be user defined or preset. A shift inhibiting module receives a transmission downshift request, prevents the requested transmission downshift when a vehicle speed is less than a set speed and greater than the set speed minus the predetermined speed variance and allows the requested transmission downshift when the vehicle speed is less than the set speed minus the predetermined speed variance.
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Citations
18 Claims
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1. A cruise control system for a vehicle, comprising:
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a speed setpoint module that stores a speed setpoint; a speed variance module that stores a predetermined speed variance; and a shift inhibiting module that receives a transmission downshift request, that prevents the requested transmission downshift when a vehicle speed is less than a set speed and greater than the set speed minus the predetermined speed variance and that allows the requested transmission downshift when the vehicle speed is less than the set speed minus the predetermined speed variance. - View Dependent Claims (2, 3, 4, 5, 9)
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6. A cruise control system for a vehicle, comprising:
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a speed setpoint module that stores a speed setpoint; a shift inhibiting module that receives a transmission downshift request, that prevents the requested transmission downshift when a vehicle speed is less than a set speed for a period that is less than a predetermined shift inhibit period and that allows the requested transmission downshift when the vehicle speed is less than the set speed for a period that is greater than the predetermined shift inhibit period. - View Dependent Claims (7, 8, 10)
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11. A method for operating a cruise control system for a vehicle, comprising:
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storing a speed setpoint; storing a predetermined speed variance; receiving a transmission downshift request; preventing the requested transmission downshift when a vehicle speed is less than a set speed and greater than the set speed minus the predetermined speed variance; and allowing the requested transmission downshift when the vehicle speed is less than the set speed minus the predetermined speed. - View Dependent Claims (12, 13, 14)
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15. A method for operating a cruise control system for a vehicle, comprising:
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storing a speed setpoint; receiving a transmission downshift request; preventing the requested transmission downshift when a vehicle speed is less than a set speed for a period that is less than a predetermined shift inhibit period; and allowing the requested transmission downshift when the vehicle speed is less than the set speed for a period that is greater than the predetermined shift inhibit period. - View Dependent Claims (16, 17, 18)
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Specification