# US 10,865,758 B2 · Engine start control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,758 B2 - Document ID: US10865758B2 - Status: Granted - Kind: B2 - Application number: 16/495,707 - Filed: 2017-03-24 - Published: 2020-02-20 - Granted: 2020-12-15 - Earliest claimed: 2017-03-24 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Keishi Takayama; Hiroshi Kurata - Web page: https://patentgrep.com/patent/US10865758B2 ## CPC - F02N 11/04: the motors being associated with current generators - B60W 30/18118: {Hill holding} - F02N 11/0818: {Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode} - F02N 11/0822: {related to action of the driver} - F02N 11/0833: {Vehicle conditions (F02N11/0822, F02N11/0825 take precedence)} - F02N 11/0862: {characterised by the electrical power supply means, e.g. battery} - F02N 11/0825: {related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state} - F02N 2200/042: Starter torque - F02N 2200/044: Starter current - F02N 2200/061: Battery state of charge [SOC] - F02N 2200/064: Battery temperature - F02N 2200/101: Accelerator pedal position - F02N 2200/102: Brake pedal position - Y02T 10/40: Engine management systems - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An engine start control device for vehicles is capable of preventing a shortage of electric power when an engine is restarted. A controller restarts an engine if an executing condition for a hill start assist control process is satisfied while the engine is being temporarily stopped according to an idling stop control process. Braking forces according to the hill start assist control process are kept by a brake oil pressure module that is energized when supplied with electric power. Restarting conditions include a plurality of ordinary restarting conditions and a particular restarting condition by way of the executing condition for the hill start assist control process. A second predetermined time after the particular restarting condition is satisfied until the ACG starter motor is energized is longer than a predetermined time after the ordinary restarting conditions are satisfied until the ACG starter motor is supplied with electric power. ## Claims ### Claim 1 An engine start control device applicable to a vehicle, comprising: an alternating-current generator starter motor for applying a starting torque to an engine when supplied with electric power from a battery and generating electric power based on rotational power from the engine; and a controller for carrying out an idling stop control process and a hill start assist control process, wherein the idling stop control process is a control process for temporarily stopping the engine if a stopping condition is satisfied and restarting the engine if restarting conditions are satisfied, wherein the hill start assist control process is a control process for keeping braking forces for a predetermined time, even if a brake operating member is released while the vehicle is being stopped on an uphill slope, wherein the controller restarts the engine if an executing condition for the hill start assist control process is satisfied while the engine is being temporarily stopped according to the idling stop control process, wherein the braking forces according to the hill start assist control process are kept by a brake oil pressure module that is energized when supplied with electric power, wherein the restarting conditions for the idling stop control process include a plurality of ordinary restarting conditions and a particular restarting condition by way of the executing condition for the hill start assist control process that is to be satisfied while the engine is being temporarily stopped according to the idling stop control process, and wherein the controller makes a second predetermined time after the particular restarting condition is satisfied until the controller starts to energize the alternating-current generator starter motor longer than a predetermined time after the ordinary restarting conditions are satisfied until the controller starts to energize the alternating-current generator starter motor. ### Claim 2 (depends on 1) The engine start control device according to claim 1, wherein the ordinary restarting conditions include a condition in which a battery charge of the battery is smaller than a predetermined value. ### Claim 3 (depends on 1) The engine start control device according to claim 1, wherein the brake operating member includes a brake lever mounted on a grip-type steering handle, and wherein the executing condition for the hill start assist control process includes a condition in which the brake lever is operated to generate the brake oil pressure. ### Claim 4 (depends on 3) The engine start control device according to claim 3, wherein the vehicle has a throttle grip mounted on the steering handle on the brake lever side and a throttle grip opening sensor for detecting an operated opening of the throttle grip, and wherein the ordinary restarting conditions include a condition in which an opening operation of the throttle grip is detected by the throttle grip opening sensor. ### Claim 5 (depends on 1) The engine start control device according to claim 1, wherein the engine has an automatic transmission, and wherein the controller controls the automatic transmission to switch to a non-power transmitting state when restarting the engine. ### Claim 6 (depends on 1) The engine start control device according to claim 1, wherein the vehicle includes an electric power load using the battery as an electric power supply source. ### Claim 7 (depends on 2) The engine start control device according to claim 2, wherein the brake operating member includes a brake lever mounted on a grip-type steering handle, and wherein the executing condition for the hill start assist control process includes a condition in which the brake lever is operated to generate the brake oil pressure. ### Claim 8 (depends on 7) The engine start control device according to claim 7, wherein the vehicle has a throttle grip mounted on the steering handle on the brake lever side and a throttle grip opening sensor for detecting an operated opening of the throttle grip, and wherein the ordinary restarting conditions include a condition in which an opening operation of the throttle grip is detected by the throttle grip opening sensor. ### Claim 9 (depends on 2) The engine start control device according to claim 2, wherein the engine has an automatic transmission, and wherein the controller controls the automatic transmission to switch to a non-power transmitting state when restarting the engine. ### Claim 10 (depends on 3) The engine start control device according to claim 3, wherein the engine has an automatic transmission, and wherein the controller controls the automatic transmission to switch to a non-power transmitting state when restarting the engine. ### Claim 11 (depends on 4) The engine start control device according to claim 4, wherein the engine has an automatic transmission, and wherein the controller controls the automatic transmission to switch to a non-power transmitting state when restarting the engine. ### Claim 12 (depends on 2) The engine start control device according to claim 2, wherein the vehicle includes an electric power load using the battery as an electric power supply source. ### Claim 13 (depends on 3) The engine start control device according to claim 3, wherein the vehicle includes an electric power load using the battery as an electric power supply source. ### Claim 14 (depends on 4) The engine start control device according to claim 4, wherein the vehicle includes an electric power load using the battery as an electric power supply source. ### Claim 15 (depends on 5) The engine start control device according to claim 5, wherein the vehicle includes an electric power load using the battery as an electric power supply source.