ELECTRONIC THROTTLE CONTROL

• US 20110301825A1
• Filed: 06/03/2011
• Published: 12/08/2011
• Est. Priority Date: 06/03/2010
• Status: Active Grant

• Current Assignee: Polaris Industries Incorporated (Polaris Inc.)
• Original Assignee: Polaris Industries Incorporated (Polaris Inc.)
• Inventors: Grajkowski, Karl J., Nault, Eric P., Erickson, Steve C., Koenig, David J.
• Granted Patent: US 9,162,573 B2
• Time in Patent Office: Days
• US Class Current: 701/102
• CPC Class Codes: B60K 2031/0091 Speed limiters or speed cutters
• CPC Class Codes: B60K 26/04 of means connecting initiating means or elements to propulsion unit
• CPC Class Codes: B60K 28/10 responsive to conditions relating to the vehicle
• CPC Class Codes: B60K 31/00 Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator fittings acting on two or more sub-units B60W30/14; speedometers G01P; systems or devices for controlling speed in general G05D13/00 ; in traffic anti-collision system for road vehicles G08G1/16
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/101 Infinitely variable gearings
• CPC Class Codes: B60W 2540/01 Occupants other than the driver
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: B60Y 2200/124 Buggies, Quads
• CPC Class Codes: B63H 3/10 characterised by having pitch control conjoint with propulsion plant control
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/604 Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/102 Switching from sequential injection to simultaneous injection
• CPC Class Codes: F02D 41/2422 Selective use of one or more tables
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence

Abstract

An electronic throttle control (ETC) system is disclosed for use on a recreational or a utility vehicle. The ETC system includes a drive mode selection device for selecting between a plurality of drive modes. The ETC system provides an adjustable engine idle speed and an engine power limiting feature.

Claims

1. A recreational vehicle including:

a chassis;

a ground engaging mechanism configured to support the chassis;

an engine supported by the chassis;

a throttle valve configured to regulate engine power;

an engine control module configured to control the throttle valve;

a throttle input device in communication with the engine control module; and

a location detection device in communication with the engine control module and configured to detect a location of the vehicle, the location detection device being configured to provide a signal to the engine control module representative of the detected location of the vehicle, the engine control module automatically controlling the throttle valve to limit the vehicle speed based on the detected location of the vehicle.

2. The vehicle of claim 1, wherein the location detection device includes a global positioning system device.

3. The vehicle of claim 1, wherein when the vehicle is located in a first area the engine control module limits a maximum speed of the vehicle to a first speed, and when the vehicle is located in a second area the engine control module limits the maximum speed of the vehicle to a second speed different from the first speed.

4. The vehicle of claim 3, wherein the first speed is less than or equal to about 5 mph and the second speed is greater than the first speed.

5. The vehicle of claim 3, wherein the first area and the second area are defined by at least one boundary, the at least one boundary being adjustable by an operator.

6. The vehicle of claim 1, wherein the engine control module includes a first operating mode and a second operating mode, wherein when the vehicle is located in a first area the engine control module limits a maximum speed of the vehicle to a first speed in the first operating mode and to a second speed in the second operating mode, the first speed being less than the second speed, and wherein when the vehicle is located in a second area the engine control module limits the maximum speed of the vehicle to a third speed in the first operating mode and to a fourth speed in the second operating mode, the third speed being less than the fourth speed.

7. A recreational vehicle including:

a chassis;

a ground engaging mechanism configured to support the chassis;

an engine supported by the chassis;

a throttle valve configured to regulate engine power;

a user interface configured to receive a security code;

an engine control module in communication with the user interface and configured to control the throttle valve, the engine control module being configured to receive the security code from the user interface; and

a location detection device in communication with the engine control module and configured to detect a location of the vehicle, the engine control module automatically limiting a torque output of the engine upon the security code being received at the engine control module and upon the detected location of the vehicle being outside a predetermined area.

8. The vehicle of claim 7, wherein the location detection device includes a global positioning system device.

9. The vehicle of claim 7, wherein the engine control module removes the limit to the torque output of the engine upon the detected location of the vehicle being within the predetermined area.

10. The vehicle of claim 9, further including a throttle operator in communication with the engine control module, the engine control module controlling the torque output of the engine based on the throttle operator when the detected location of the vehicle is within the predetermined area.

11. An electronic throttle control method for a vehicle, the method including the steps of:

providing an engine, a throttle valve configured to control a torque output of the engine, and an engine control module configured to control the throttle valve;

monitoring at least one of a vehicle speed and an engine speed;

receiving a request associated with a maximum vehicle speed;

limiting the vehicle to the maximum vehicle speed upon the at least one of the vehicle speed and the engine speed being less than or equal to a threshold speed; and

limiting the vehicle to a default maximum vehicle speed upon the at least one of the vehicle speed and the engine speed being greater than the threshold speed.

12. The method of claim 11, wherein the threshold speed is about zero.

13. The method of claim 11, wherein the first limiting step is performed after a predetermined time delay following the receiving step.

14. The method of claim 13, wherein the receiving step includes receiving a plurality of requests associated with a plurality of maximum vehicle speeds, the first limiting step including applying the last received maximum vehicle speed prior to expiration of the predetermined time delay.

15. The method of claim 11, further providing a vehicle speed sensor configured to detect the vehicle speed, wherein the second limiting step is performed further upon detection of an error associated with the vehicle speed sensor.

16. The method of claim 11, further providing a transmission having a first gear and a second gear, wherein the default maximum vehicle speed includes a first default speed associated with the first gear and a second default speed associated with the second gear, wherein the second limiting step includes applying the first default speed when the transmission is in the first gear and the second default speed when the transmission is in the second gear.