# US 10,864,914 B2 · Control device of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,914 B2 - Document ID: US10864914B2 - Status: Granted - Kind: B2 - Application number: 16/405,379 - Filed: 2019-05-07 - Published: 2019-11-07 - Granted: 2020-12-15 - Earliest claimed: 2018-05-07 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Takuma Kumazawa - Web page: https://patentgrep.com/patent/US10864914B2 ## CPC - B60W 30/18072: {Coasting} - B60K 6/485: Motor-assist type - B60W 10/02: including control of driveline clutches - B60W 10/06: including control of combustion engines - B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps - B60W 20/40: Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)} - H02J 7/1446: {in response to parameters of a vehicle} - B60W 2030/18081: {With torque flow from driveshaft to engine, i.e. engine being driven by vehicle} - B60W 2030/1809: {Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral} - B60W 2510/0638: Engine speed - B60W 2510/081: Speed - B60W 2510/305: Power absorbed by auxiliaries - B60W 2520/10: Longitudinal speed - B60W 2540/10: Accelerator pedal position - B60W 2540/12: Brake pedal position - B60W 2710/06: Combustion engines, Gas turbines - B60W 2710/10: Change speed gearings - H02J 2105/33: exchanging power with road vehicles - Y02T 10/60: Other road transportation technologies with climate change mitigation effect - Y02T 10/62: Hybrid vehicles - Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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 - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A control device of a vehicle including an engine, an auxiliary machine driven by rotation of the engine, and an engagement device selectively connecting and disconnecting a power transmission path between the engine and drive wheels comprises: a coasting control portion for selectively providing a first coasting control for allowing the vehicle to coast with the engine brought into a drive state while the power transmission path is disconnected by release of the engagement device, and a second coasting control for allowing the vehicle to coast with the engine brought into a stop state while the power transmission path is connected. If a load of the auxiliary machine is equal to or greater than a predetermined load and a vehicle speed is equal to or greater than a predetermined vehicle speed when a predetermined coasting start condition is satisfied, the coasting control portion provides the first coasting control. ## Claims ### Claim 1 A control device of a vehicle including an engine, an auxiliary machine driven by rotation of the engine, and an engagement device selectively connecting and disconnecting a power transmission path between the engine and drive wheels, the control device comprising: a coasting control portion for selectively providing a first coasting control for allowing the vehicle to coast with the engine brought into a drive state while the power transmission path is disconnected by release of the engagement device, and a second coasting control for allowing the vehicle to coast with the engine brought into a stop state while the power transmission path is connected, wherein if a load of the auxiliary machine is equal to or greater than a predetermined load and a vehicle speed is equal to or greater than a predetermined vehicle speed when a predetermined coasting start condition is satisfied, the coasting control portion provides the first coasting control. ### Claim 2 (depends on 1) The control device of the vehicle according to claim 1, wherein the vehicle further includes a generator driven by rotation of the engine, wherein the coasting control portion is configured to provide a regenerative control through electric power generation of the generator in the second coasting control, and wherein when the vehicle has at least one of the load of the auxiliary machine less than the predetermined load and the vehicle speed less than the predetermined vehicle speed when the predetermined coasting start condition is satisfied, the coasting control portion provides the second coasting control and suppresses the electric power generation of the generator as compared to the electric power generation by the generator performed at a maximum electric-power-generation voltage. ### Claim 3 (depends on 2) The control device of the vehicle according to claim 2, wherein the vehicle further includes a battery storing a generated electric power of the generator, wherein the coasting control portion suppresses the electric power generation of the generator by setting an electric power generation amount of the generator to zero when a capacity of the battery is equal to or greater than a predetermined capacity, and suppresses the electric power generation of the generator by performing a constant-voltage electric power generation in which an electric-power-generation voltage of the generator is maintained constant at a predetermined voltage lower than the maximum electric-power-generation voltage when the capacity of the battery is less than the predetermined capacity. ### Claim 4 (depends on 2) The control device of the vehicle according to claim 2, wherein the vehicle further includes a battery storing a generated electric power of the generator, wherein the coasting control portion suppresses the electric power generation of the generator by setting an electric power generation amount of the generator to zero when a fluctuation in voltage of the battery is permitted, and suppresses the electric power generation of the generator by performing a constant-voltage electric power generation in which an electric-power-generation voltage of the generator is maintained constant at a predetermined voltage lower than the maximum electric-power-generation voltage when the fluctuation in voltage of the battery is not permitted. ### Claim 5 (depends on 2) The control device of the vehicle according to claim 2, wherein when the vehicle speed becomes less than a second predetermined vehicle speed lower than the predetermined vehicle speed during provision of one of the second coasting control with the electric power generation of the electric generator suppressed and the first coasting control, the coasting control portion shifts the control to the second coasting control with the electric-power-generation voltage of the generator set to the maximum electric-power-generation voltage. ### Claim 6 (depends on 2) The control device of the vehicle according to claim 2, further comprising a deceleration request determining portion determining whether a request for deceleration of the vehicle is large or small when the predetermined coasting start condition is satisfied, wherein when it is determined that the request for deceleration is small, the coasting control portion provides the first coasting control or the second coasting control with the electric power generation of the electric generator suppressed. ### Claim 7 (depends on 6) The control device of the vehicle according to claim 6, wherein if it is determined that the request for deceleration is large, the coasting control portion provides the second coasting control and provides the regenerative control at the maximum electric-power-generation voltage. ### Claim 8 (depends on 1) The control device of the vehicle according to claim 1, wherein the auxiliary machine is a compressor for an air conditioner.