# US 2014/0207348 A1 · Coast stop vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0207348 A1 - Document ID: US20140207348A1 - Status: Published application - Kind: A1 - Application number: 14/240,618 - Filed: 2012-07-19 - Published: 2014-07-24 - Earliest claimed: 2011-08-31 - Assignees: JATCO Ltd - Inventors: Hideshi Wakayama; Noritaka Aoyama; Kousuke Waku; Hiroyasu Tanaka; Keichi Tatewaki - Web page: https://patentgrep.com/patent/US20140207348A1 ## CPC - B60W 10/06: including control of combustion engines - B60W 10/11: Stepped gearings - B60W 30/18072: {Coasting} - F02D 17/00: Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling (controlling or rendering inoperative by varying inlet or exhaust valve operating characteristics F02D13/00) - F02D 29/00: Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto - F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers - F02D 41/123: {the fuel injection being cut-off} - F16H 61/00: Control functions within {control units of} change-speed- or reversing-gearings for conveying rotary motion {; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing} - F16H 61/0031: {using auxiliary pumps, e.g. pump driven by a different power source than the engine} - F16H 61/66272: {characterised by means for controlling the torque transmitting capability of the gearing} - F16H 61/702: {using electric or electrohydraulic control means} - F16H 63/50: Signals to an engine or motor - B60W 2510/0241: Clutch slip, i.e. difference between input and output speeds - B60Y 2300/46: Engine injection cut at coasting - F01M 2001/123: {using two or more pumps} - F02D 2200/023: Temperature of lubricating oil or working fluid - F02D 2200/501: Vehicle speed - F02N 11/084: {State of vehicle accessories, e.g. air condition or power steering} - F16H 61/662: with endless flexible members - F16H 2037/023: {the combined gearing being provided with at least two forward and one reverse ratio in a serially arranged sub-transmission} - F16H 2059/465: {Detecting slip, e.g. clutch slip ratio} - F16H 2312/14: Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights - F16N 11/08: with mechanical drive, other than directly by springs or weights (lubricating-pumps F16N13/00) - Y02T 10/60: Other road transportation technologies with climate change mitigation effect - 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) - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - F16N: LUBRICATING - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A coast stop vehicle includes power transmission means provided between a drive source and drive wheels, drive source automatic stop means configured to stop the drive source during vehicle running when a value indicating a driving state of the vehicle is in a drive source stop permission region, slip determination means configured to determine whether or not there is slip in the power transmission means while the drive source is stopped by the drive source automatic stop means, and a changer means configured to narrow the drive source stop permission region when the occurrence of the slip in the power transmission means was determined by the slip determination means. ## Claims ### Claim 1 A coast stop vehicle, comprising: a power transmission unit provided between a drive source and drive wheels; a drive source automatic stop unit configured to stop the drive source during vehicle running when a value indicating a driving state of the vehicle is in a drive source stop permission region; a slip determination unit configured to determine whether or not there is a slip in the power transmission as while the drive source is stopped by the drive source automatic stop unit; and a changer unit configured to narrow the drive source stop permission region when the occurrence of the slip in the power transmission unit was determined by the slip determination unit. ### Claim 2 (depends on 1) The coast stop vehicle according to claim 1, wherein: the drive source stop permission region is specified at least based on a vehicle speed, the drive source automatic stop unit stops the drive source during the vehicle running when the vehicle speed is lower than a predetermined vehicle speed; and the changer can unit sets the predetermined vehicle speed to be lower than the predetermined vehicle speed at which the occurrence of the slip was determined when the occurrence of the slip was determined. ### Claim 3 (depends on 1) The coast stop vehicle according to claim 1, wherein: the drive source stop permission region is specified at least based on an oil temperature, the drive source automatic stop unit stops the drive source during the vehicle running when the oil temperature is not lower than a predetermined oil temperature; and the changer unit sets the predetermined oil temperature to be higher than the predetermined oil temperature at which the occurrence of the slip was determined when the occurrence of the slip was determined. ### Claim 4 (depends on 1) The coast stop vehicle according to claim 1, comprising: a variator arranged between the drive source and the drive wheels and capable of continuously changing a speed ratio between the drive source and the drive wheels, wherein: the drive source stop permission region is specified at least based on a speed ratio of the variator, the drive source automatic stop unit stops the drive source during the vehicle running when the speed ratio of the variator is in a speed ratio region between a first predetermined speed ratio and a second predetermined speed ratio larger than the first predetermined speed ratio; and the changer unit sets the second predetermined speed ratio to be smaller than the second predetermined speed ratio at which the occurrence of the slip was determined when the occurrence of the slip was determined. ### Claim 5 (depends on 1) The coast stop vehicle according to claim 1, wherein: the changer unit further changes the changed drive source stop permission region when the occurrence of the slip was determined by the slip determination unit after the drive source stop permission region was changed. ### Claim 6 (depends on 1) The coast stop vehicle according to claim 1, wherein: the changer unit increases a change amount with an increase in a slip amount of the power transmission unit. ### Claim 7 (depends on 1) The coast stop vehicle according to claim 1, comprising: a deceleration detection unit configured to detect a deceleration of the vehicle, wherein: the changer unit does not change the drive source stop permission region even upon the occurrence of the slip when the deceleration is higher than a predetermined deceleration and the vehicle is suddenly decelerated. ### Claim 8 (depends on 1) The coast stop vehicle according to claim 1, wherein: the changer unit stores the drive source stop permission region after a change until an ignition switch is turned off. ### Claim 9 A control method for controlling coast stop vehicle including power transmission unit provided between a drive source and drive wheels, the control method comprising: stopping the drive source during vehicle running when a value indicating a driving state of the vehicle is in a drive source stop permission region; determining whether or not there is a slip in the power transmission unit while the drive source is stopped; and narrowing the drive source stop permission region when the occurrence of the slip in the power transmission unit was determined. ### Claim 10 A coast stop vehicle, comprising: power transmission unit provided between a drive source and drive wheels; drive source automatic stop means for stopping the drive source during vehicle running when a value indicating a driving state of the vehicle is in a drive source stop permission region; slip determination means for determining whether or not there is a slip in the power transmission means while the drive source is stopped by the drive source automatic stop means; and changer means for narrowing the drive source stop permission region when the occurrence of the slip in the power transmission means was determined by the slip determination means.