# US 8,543,306 B2 · Vehicle having speed control unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,543,306 B2 - Document ID: US8543306B2 - Status: Granted - Kind: B2 - Application number: 12/501,944 - Filed: 2009-07-13 - Published: 2010-01-28 - Granted: 2013-09-24 - Earliest claimed: 2008-07-24 - Assignees: Polaris Industries Inc. - Applicants: Jeremy Utke; David Jubie; G. Jay McKoskey; Timothy A Skime - Inventors: Jeremy Utke; David Jubie; G. Jay McKoskey; Timothy A Skime - Web page: https://patentgrep.com/patent/US8543306B2 ## CPC - F02D 9/02: concerning induction conduits (throttle valves, or arrangements thereof in conduits F02D9/08) - B60K 13/02: concerning intake - B60N 2/0284: {Adjustable seat-cushion length (B60N2/0224 takes precedence)} - B60N 2/10: tiltable (B60N2/12 {, B60N2/2875} take precedence) - B60N 2/502: {attached to the base of the seat (B60N2/504 takes precedence)} - B60N 2/505: {Adjustable suspension including height adjustment} - B60N 2/522: {characterised by dampening means} - B60N 2/544: {Compression or tension springs (B60N2/542 takes precedence)} - F02D 9/14: the members being slidable transversely of conduit - F02M 35/10032: {specially shaped or arranged connecting duct between carburettor or air inlet duct and the plenum chamber; specially positioned carburettors or throttle bodies with respect to the plenum chamber} - F02M 35/162: {Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts} - F02D 31/006: {for maximum speed control} - F02D 2009/023: {Engine speed} - F02D 2200/501: Vehicle speed - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract A tractor is disclosed as a four-wheel drive vehicle with a movable seat back, with a seat height adjustment and with a varying load capability. ## Claims ### Claim 1 A vehicle, comprising: a frame; ground engaging elements; an engine for motively driving one or more of the ground engaging elements having an air intake supplying air to an engine combustion chamber; and a speed control unit for controlling the engine speed and a top speed of the vehicle comprising: a guillotine air valve positioned intermediate the air intake and the engine, the guillotine air valve being connected to a diaphragm; and a controller assembly for opening and closing the air valve, the assembly including a speed sensing mechanism and a controlling unit for opening and closing the air valve, wherein the controlling unit raises the diaphragm and maintains the guillotine air valve in an open position when the vehicle is operating at a speed below an upper limit. ### Claim 2 (depends on 1) The vehicle of claim 1, wherein the air valve is a gate valve. ### Claim 3 (depends on 1) The vehicle of claim 1, wherein the controlling unit, which when the vehicle operates at a speed approaching the upper limit, controls the diaphragm to a closed position, which closes the air valve and slows the vehicle. ### Claim 4 (depends on 3) The vehicle of claim 3, wherein the controlling unit is a solenoid valve. ### Claim 5 (depends on 4) The vehicle of claim 4, wherein the solenoid valve is connected to an area above the diaphragm. ### Claim 6 (depends on 5) The vehicle of claim 5, wherein when the vehicle is operating below the upper limit, the solenoid valve is closed. ### Claim 7 (depends on 6) The vehicle of claim 6, wherein when the vehicle is operating above the upper limit, the solenoid valve is open and connects atmospheric pressure to the area above the diaphragm, and closes the guillotine air valve. ### Claim 8 A vehicle, comprising: a frame; ground engaging elements; an engine for motively driving one or more of the ground engaging elements having an air intake supplying air to an engine combustion chamber; and a speed control unit for controlling the engine speed and a top speed of the vehicle comprising: a guillotine air valve connected to a diaphragm and positioned intermediate the air intake and the engine; a controller assembly for opening and closing the air valve, the assembly including a speed sensing mechanism and a controlling unit for opening and closing the guillotine air valve, wherein the controlling unit controls the diaphragm to a closed position to close the guillotine air valve and slow the vehicle when the vehicle operates at a speed approaching an upper limit. ### Claim 9 (depends on 8) The vehicle of claim 8, wherein the guillotine air valve is a gate valve. ### Claim 10 (depends on 9) The vehicle of claim 9, wherein the controlling unit, when the vehicle is operating below the upper limit, allows the diaphragm to be raised and maintains the gate valve open. ### Claim 11 (depends on 8) The vehicle of claim 8, wherein the controlling unit is a solenoid valve. ### Claim 12 (depends on 11) The vehicle of claim 11, wherein the solenoid valve is connected to an area above the diaphragm. ### Claim 13 (depends on 12) The vehicle of claim 12, wherein when the vehicle is operating below the upper limit, the solenoid valve is closed. ### Claim 14 (depends on 13) The vehicle of claim 13, wherein when the vehicle is operating above the upper limit, the solenoid valve is open and connects atmospheric pressure to the area above the diaphragm, and closes the guillotine air valve.