# US 2019/0170071 A1 · Controller of internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170071 A1 - Document ID: US20190170071A1 - Status: Published application - Kind: A1 - Application number: 16/210,296 - Filed: 2018-12-05 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Mitsuo Hashizume; Yujiro Tsutsumi; Hiroyasu Motoi; Chiho Chinda; Hiroaki Tone; Hideyuki Yasuda - Web page: https://patentgrep.com/patent/US20190170071A1 ## CPC - F02D 35/028: {by determining the combustion timing or phasing} - F02B 37/18: by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere} - F02D 37/02: one of the functions being ignition - F02D 41/1446: {the characteristics being exhaust temperatures} - F02D 41/1466: {the characteristics being a soot concentration or content} - F02P 5/1504: {with particular means during a transient phase, e.g. acceleration, deceleration, gear change (during starting F02P5/1506)} - F02P 5/152: dependent on pinking (detecting or indicating knocks in internal-combustion engines G01L23/22) - F02D 35/025: {by determining temperatures inside the cylinder, e.g. combustion temperatures} - F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)} - F02D 2041/001: {for engines with variable valve actuation} - F02D 2200/0406: Intake manifold pressure - F02D 2200/0414: Air temperature - F02D 2250/38: Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - 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) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A controller of an internal combustion engine retards the ignition timing by a soot suppression necessary retard amount IGCR as a retard amount for suppressing the soot generation amount in exhaust gas, from an optimal ignition timing IGMBT, according to a detected operation state, e.g., engine water temperature TW, charging efficiency ETAC, engine speed NE, of an internal combustion engine 3. A controller of an internal combustion engine of a second invention retards an ignition timing IGLOG to suppress the soot generation amount in exhaust gas, according to an operation state of the internal combustion engine 3, in a normally aspirated operation state where the charging efficiency ETAC is not higher than 100%, and in a turbocharged operation state. ## Claims ### Claim 1 A controller of an internal combustion engine, comprising: operation state detection means for detecting an operation state of an internal combustion engine; retard amount calculation means for calculating, according to the detected operation state of the internal combustion engine, a particulate matter suppression retard amount which is a retard amount effective to suppress a generation amount of particulate matter in exhaust gas of said internal combustion engine; and retard control means for performing particulate matter suppression retard control by retarding an ignition timing by said particulate matter suppression retard amount from a predetermined reference ignition timing. ### Claim 2 (depends on 1) The controller of an internal combustion engine according to claim 1, further comprising: reference ignition timing calculation means for calculating, according to the operation state of said internal combustion engine, an optimal ignition timing as said reference ignition timing at which a maximum output torque of said internal combustion engine is obtained, wherein said retard control means retards the ignition timing by said particulate matter suppression retard amount from said optimal ignition timing to set the ignition timing of said internal combustion engine. ### Claim 3 (depends on 1) The controller of an internal combustion engine according to claim 1, wherein said operation state detection means detects a temperature of said internal combustion engine as the operation state of the internal combustion engine, and said retard control means performs said particulate matter suppression retard control when it is detected that said detected temperature of the internal combustion engine is within a predetermined low-temperature region. ### Claim 4 (depends on 1) The controller of an internal combustion engine according to claim 1, wherein said internal combustion engine is a power source mounted in a vehicle, and said retard control means performs said particulate matter suppression retard control, in a load operation state of said internal combustion engine which does not include an idle operation state or a no-load operation state where said vehicle is parked and a shift lever of the vehicle is in a neutral or parking position. ### Claim 5 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said operation state detection means detects a speed, a load, and a temperature of the internal combustion engine as the operation state of the internal combustion engine, and said retard amount calculation means calculates said particulate matter suppression retard amount on the basis of said detected speed, load, and temperature of the internal combustion engine. ### Claim 6 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said retard amount calculation means calculates, at a start of said particulate matter suppression retard control, said particulate matter suppression retard amount, such that the particulate matter suppression retard amount gradually varies from a value immediately before the start, toward a retard side. ### Claim 7 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said retard amount calculation means calculates, at an end of said particulate matter suppression retard control, said particulate matter suppression retard amount, such that the particulate matter suppression retard amount gradually varies from a value immediately before the end, toward an advance side. ### Claim 8 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said operation state detection means detects an atmospheric pressure as the operation state of said internal combustion engine, and said retard amount calculation means calculates said particulate matter suppression retard amount, such that the particulate matter suppression retard amount is limited more strictly for a lower value of said detected atmospheric pressure. ### Claim 9 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said operation state detection means detects a temperature of said internal combustion engine as the operation state of the internal combustion engine, and said retard amount calculation means calculates said particulate matter suppression retard amount, such that the particulate matter suppression retard amount is limited more strictly for a lower value of said detected temperature of the internal combustion engine. ### Claim 10 (depends on 1) The controller of an internal combustion engine according to claim 1, further comprising: target intake amount setting means for setting a target intake amount according to a target torque of said internal combustion engine; intake amount correction parameter calculation means for calculating, according to said particulate matter suppression retard amount, an intake amount correction parameter for compensating for an intake amount corresponding to a reduced amount of output torque of said internal combustion engine when said particulate matter suppression retard control is performed; and intake amount correction means for increasing said set target intake amount according to the calculated intake amount correction parameter. ### Claim 11 (depends on 2) The controller of an internal combustion engine according to claim 2, further comprising: knocking suppression retard amount calculation means for calculating a knocking suppression retard amount as an ignition timing retard amount for suppressing knocking of said internal combustion engine, on a basis of an occurrence limit of the knocking; learning means for updating, on a basis of the knocking suppression retard amount, a knock learning value used for knocking control; and learning prohibition means for prohibiting the update of said knock learning value when said particulate matter suppression retard amount is on the retard side of said knocking suppression retard amount. ### Claim 12 (depends on 2) The controller of an internal combustion engine according to claim 2, wherein said internal combustion engine has a turbocharger configured to turbocharge intake air, and during a turbocharged operation by said turbocharger, said retard amount calculation means calculates said particulate matter suppression retard amount, such that the particulate matter suppression retard amount is limited more strictly for a higher load of said internal combustion engine, and sets said particulate matter suppression retard amount to 0 when a turbocharge pressure is a maximum turbocharge pressure. ### Claim 13 A controller of an internal combustion engine having a turbocharger configured to turbocharge intake air, the controller comprising: operation state detection means for detecting an operation state of said internal combustion engine; and ignition timing retard control means for performing particulate matter suppression retard control by retarding an ignition timing to suppress a generation amount of particulate matter in exhaust gas of said internal combustion engine, according to said detected operation state of the internal combustion engine, in a normally aspirated operation state where operation of said turbocharger is stopped, and in a turbocharged operation state where the operation of said turbocharger is performed.