# US 10,767,615 B2 · Multipurpose vehicle

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- Number: US 10,767,615 B2
- Document ID: US10767615B2
- Status: Granted
- Kind: B2
- Application number: 15/354,119
- Filed: 2016-11-17
- Published: 2017-09-07
- Granted: 2020-09-08
- Earliest claimed: 2016-11-17
- Assignees: Kubota Corporation
- Applicants: Kubota Corporation
- Inventors: Noriyasu Honjo; Takeshi Satozono; Jun Yoshida; Rihito Fukuda
- Web page: https://patentgrep.com/patent/US10767615B2

## CPC

- F02M 63/0205: {for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors (safety devices acting on engine fuel system on lubricant pressure failure F01M1/24); for cutting-out pumps for stopping the engine}
- B60K 17/342: having a longitudinal, endless element, e.g. belt or chain, for transmitting drive to wheels
- B60K 31/02: including electrically actuated servomechanism
- B60W 30/146: {Speed limiting}
- B60W 30/188: Controlling power parameters of the driveline, e.g. determining the required power
- F02D 31/009: {for maximum speed control}
- F02D 41/0082: {per groups or banks (F02D41/0087 takes precedence)}
- F02D 41/0087: {Selective cylinder activation, i.e. partial cylinder operation (deceleration cut-off F02D41/123)}
- F02D 41/021: {Introducing corrections for particular conditions exterior to the engine (conjoint control of vehicle sub-units for propelling the vehicle B60W30/18)}
- F02D 41/0225: {in relation with the gear ratio or shift lever position}
- F02D 41/34: with means for controlling injection timing or duration
- B60K 17/344: having a transfer gear
- B60K 2005/003: {the internal combustion or jet propulsion unit is arranged between the front and the rear axle}
- B60K 2031/0091: {Speed limiters or speed cutters}
- B60W 2510/0638: Engine speed
- B60W 2520/10: Longitudinal speed
- B60W 2540/10: Accelerator pedal position
- B60Y 2400/72: Continous variable transmissions [CVT]
- F02D 41/123: {the fuel injection being cut-off}
- F02D 2200/501: Vehicle speed
- Y02T 10/40: Engine management systems
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- 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)
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A multipurpose vehicle includes an engine that has a plurality of cylinders, a traveling vehicle body that has a traveling device that is driven based on a driving force of the engine, a man-operable accelerator operating tool, a controller that controls a fuel injection quantity with respect to the plurality of cylinders of the engine based on an amount of operation of the accelerator operating tool, and a vehicle speed sensor that detects a traveling speed of the traveling vehicle body. If the traveling speed of the traveling vehicle body reaches or exceeds a set maximum traveling speed, the controller suppresses the fuel injection quantity supplied with respect only to one/some of the plurality of cylinders, irrespective of the amount of operation of the accelerator operating tool.

## Claims

### Claim 1

A multipurpose vehicle comprising:
a traveling vehicle body;
a vehicle speed sensor that detects a traveling speed of the traveling vehicle body;
an engine mounted on the vehicle body, the engine having a plurality of cylinders, the plurality of cylinders including a first cylinder and a second cylinder;
a man-operable accelerator operating tool; and
a controller that is configured to control a fuel injection quantity with respect to the first cylinder and the second cylinder based on an amount of operation of the accelerator operating tool,
wherein when the traveling speed of the traveling vehicle body reaches or exceeds a set maximum traveling speed, the controller is configured to suppress the fuel injection quantity supplied to the first cylinder, irrespective of the amount of operation of the accelerator operating tool, and
when the traveling speed of the traveling vehicle body remains equal to or higher than the set maximum traveling speed, the controller is configured to change a cylinder subject to fuel injection quantity suppression from the first cylinder to the second cylinder, wherein the fuel injection quantity suppression of the second cylinder comprises reducing the fuel injection quantity, to be supplied to the second cylinder, to a quantity greater than zero.

### Claim 2 (depends on 1)

The multipurpose vehicle according to claim 1, further comprising:
a rotation sensor that detects an actual rotational speed of the engine,
wherein if the rotational speed of the engine reaches or exceeds a set maximum rotational speed, the controller is configured to suppress the fuel injection quantity supplied with respect only to at least one of the plurality of cylinders, irrespective of the amount of operation of the accelerator operating tool.

### Claim 3 (depends on 1)

The multipurpose vehicle according to claim 1, further comprising:
a belt-type power transmission device that is configured to receive a driving force of the engine, and
wherein the belt-type power transmission device has an input rotor, an output rotor, and an endless belt extending around and between the input rotor and the output rotor.

### Claim 4 (depends on 1)

The multipurpose vehicle according to claim 1, further comprising:
a speed-changing device that is configured to receive a driving force of the engine and change the driving force to be switched to a plurality of speed shift states with different gear ratios,
wherein the set maximum traveling speed is set in the controller such that different set maximum traveling speeds are set for different ones of the speed shift states switched by the speed-changing device.

### Claim 5 (depends on 1)

The multipurpose vehicle according to claim 1, further comprising:
a first exhaust pipe provided in association with the first cylinder to discharge an exhaust gas therefrom;
a second exhaust pipe provided in association with the second cylinder to discharge the exhaust gas therefrom; and
a temperature sensor that detects a temperature of the first exhaust pipe,
wherein, when the temperature detected by the temperature sensor of the first exhaust pipe is lower than a predetermined temperature, the controller is configured to change the cylinder subject to fuel injection quantity suppression from the first cylinder to the second cylinder.

### Claim 6

A multipurpose vehicle comprising:
a traveling vehicle body;
a vehicle speed sensor that detects a traveling speed of the traveling vehicle body;
an engine mounted on the vehicle body, the engine including a first cylinder and a second cylinder;
a speed-changing device that receives a driving force of the engine and changes the driving force to be switched to a plurality of speed shift states with different gear ratios;
a man-operable accelerator operating tool; and
a controller that is configured to control a fuel injection quantity with respect to the first cylinder and the second cylinder based on an amount of operation of the accelerator operating tool, the controller including a maximum traveling speed setting unit that sets a maximum traveling speed of the traveling vehicle body, wherein different maximum traveling speeds are set for different ones of the speed shift states switched by the speed-changing device,
wherein when the traveling speed of the traveling vehicle body detected by the vehicle speed sensor reaches or exceeds the maximum traveling speed that is set in the maximum traveling speed setting unit, the controller is configured to suppress the fuel injection quantity supplied to the first cylinder, irrespective of the amount of operation of the accelerator operating tool, for a first predetermined time interval, and
when the traveling speed of the traveling vehicle body remains equal to or higher than the set maximum traveling speed after lapse of the first predetermined time interval, the controller is configured to change a cylinder subject to fuel injection quantity suppression from the first cylinder to the second cylinder, wherein the fuel injection quantity suppression of the second cylinder comprises reducing the fuel injection quantity, to be supplied to the second cylinder, to a quantity greater than zero;
wherein the controller is configured to change the cylinders subject to the fuel injection quantity suppression from one to another sequentially after lapse of a second predetermined time interval; and
wherein the first predetermined time interval is different from the second predetermined time interval.