# US 2014/0207347 A1 · Vehicle control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0207347 A1 - Document ID: US20140207347A1 - Status: Published application - Kind: A1 - Application number: 14/240,593 - Filed: 2012-07-18 - Published: 2014-07-24 - Earliest claimed: 2011-08-30 - Assignees: JATCO Ltd - Inventors: Kousuke Waku; Hideshi Wakayama; Noritaka Aoyama - Web page: https://patentgrep.com/patent/US20140207347A1 ## CPC - F16H 61/12: Detecting malfunction or potential malfunction, e.g. fail safe (in control of hydrostatic gearing F16H61/4192) {; Circumventing or fixing failures} - F16H 59/46: dependent on a comparison between speeds - 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 2037/023: {the combined gearing being provided with at least two forward and one reverse ratio in a serially arranged sub-transmission} - F16H 2057/014: {of friction elements in transmissions} - 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 - F16H: GEARING ## Abstract A vehicle control device for controlling a vehicle including a first power transmission mechanism arranged between a drive source and a drive wheel, and a second power transmission mechanism which is arranged in series with the first power transmission mechanism and which changes a speed ratio between an input shaft and an output shaft, includes slip detection means configured to detect whether or not a slip occurs in the first power transmission mechanism, and shift means configured to reduce the slip by shifting the second power transmission mechanism in a case where occurrence of the slip is detected by the slip detection means. ## Claims ### Claim 1 A vehicle control device for controlling a vehicle including a first power transmission mechanism arranged between a drive source and a drive wheel, and a second power transmission mechanism arranged in series with the first power transmission mechanism the second power transmission mechanism which is shifted between an input shaft and an output shaft, the vehicle control device comprising: a slip detection unit configured to detect whether or not a slip occurs in the first power transmission mechanism; and a shift unit configured to reduce the slip by shifting the second power transmission mechanism in a case where occurrence of the slip is detected by the slip detection unit. ### Claim 2 (depends on 1) The vehicle control device according to claim 1, comprising: a comparison unit configured to compare a first rotation speed serving as a rotation speed on the drive wheel side of the first power transmission mechanism, and a second rotation speed serving as a rotation speed on the drive source side of the first power transmission mechanism, wherein in a case where the occurrence of the slip is detected and the first rotation speed is higher than the second rotation speed, the shift unit shifts the second power transmission mechanism to the High side. ### Claim 3 (depends on 1) The vehicle control device according to claim 1, comprising: a comparison unit configured to compare a first rotation speed serving as a rotation speed on the drive wheel side of the first power transmission mechanism, and a in a case where the occurrence of the slip is detected and the second rotation speed is higher than the first rotation speed, the shift unit shifts the second power transmission mechanism to the Low side. ### Claim 4 (depends on 2) The vehicle control device according to claim 2, comprising: a first rotation speed detection unit configured to detect the first rotation speed: and a second rotation speed detection unit configured to detect the second rotation speed. ### Claim 5 (depends on 1) The vehicle control device according to claim 1, comprising: a coast stop control unit configured to stop the drive source during running of the vehicle when a predetermined condition is met; and a hydraulic pressure supply unit configured to supply a hydraulic pressure to the second power transmission mechanism in a case where the drive source is stopped during the running of the vehicle, wherein the first power transmission mechanism includes a frictional engagement element, the second power transmission mechanism is a variator in which a power transmission member is looped over two pulleys, which enables to continuously shift between the input shaft and the output shaft, and the shift unit shifts the variator with using the hydraulic pressure supplied from the hydraulic pressure supply unit. ### Claim 6 (depends on 5) The vehicle control device according to claim 5, wherein the hydraulic pressure supply unit is an electric oil pump. ### Claim 7 (depends on 5) The vehicle control device according to claim 5, comprising: a cranking unit configured to crank the drive source, wherein the hydraulic pressure supply unit is a mechanical oil pump to be driven by transmitting rotation of the drive source, and the shift unit shifts the variator with using a hydraulic pressure generated in the mechanical oil pump by cranking the drive source. ### Claim 8 (depends on 1) The vehicle control device according to claim 1, wherein the first power transmission mechanism includes a frictional engagement element, and the vehicle control device comprises: a slip amount calculation unit configured to calculate a slip amount of the first power transmission mechanism; and a release unit configured to release the frictional engagement element in a case where the slip amount is larger than an allowable value with which the slip is capable of being ended by shift in the second power transmission mechanism. ### Claim 9 (depends on 8) The vehicle control device according to claim 8, wherein the shift unit shifts the second power transmission mechanism to the Low side after the frictional engagement element is released by the release unit. ### Claim 10 A control method for controlling a vehicle including a first power transmission mechanism arranged between a drive source and a drive wheel, and a second power transmission mechanism arranged in series with the first power transmission mechanism, the second power transmission mechanism which is shifted between an input shaft and an output shaft, the control method comprising: detecting whether or not a slip occurs in the first power transmission mechanism: and reducing the slip by shifting the second power transmission mechanism in a case where occurrence of the slip is detected. ### Claim 11 A vehicle control device for controlling a vehicle including a first power transmission mechanism arranged between a drive source and a drive wheel, and a second power transmission mechanism arranged in series with the first power transmission mechanism, the second power transmission mechanism which is shifted between an input shaft and an output shaft, the vehicle control device comprising: slip detection means for detecting whether or not a slip occurs in the first power transmission mechanism; and shift means for reducing the slip by shilling the second power transmission mechanism in a case where occurrence of the slip is detected by the slip detection means.