# US 2014/0190161 A1 · Supercharger Control Device for 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 2014/0190161 A1 - Document ID: US20140190161A1 - Status: Published application - Kind: A1 - Application number: 14/240,119 - Filed: 2012-08-30 - Published: 2014-07-10 - Earliest claimed: 2011-09-02 - Assignees: Daimler AG - Inventors: Yuukichi Hayashi - Web page: https://patentgrep.com/patent/US20140190161A1 ## CPC - F02B 37/12: Control of the pumps - F02B 37/18: by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere} - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)} - F01N 2240/26: an exhaust gas reservoir, e.g. emission buffer - F02B 2037/122: {Control of rotational speed of the pump} - Y02T 10/12: Improving ICE efficiencies - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - 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) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A turbocharging system of an internal combustion engine includes compressor of a turbocharger disposed on an intake passage of an internal combustion engine and a turbine disposed on an exhaust passage of the internal combustion engine. A bypass passage connects an upstream side and a downstream side of the turbine in the exhaust passage together. A wastegate valve, which is disposed on the bypass passage, opens and closes the bypass passage according to turbocharging pressure of the compressor. An accumulator, which accumulates exhaust gas pressure, is connected to a downstream side of the wastegate valve in the bypass passage. A recirculation passage connects the accumulator and an upstream side of the turbine together, and a recirculation valve, which opens and closes the recirculation passage based on an output request, is deposed on the recirculation passage. ## Claims ### Claim at position 1 1-5. (canceled) ### Claim 6 A turbocharging control apparatus configured to control operation of a turbocharger having a compressor disposed on an intake passage of an internal combustion engine and a turbine disposed on an exhaust passage of the internal combustion engine, comprising: a bypass passage connecting an upstream side and a downstream side of the turbine in the exhaust passage together; a wastegate valve disposed on the bypass passage, wherein the wastegate value is configured to open and close the bypass passage according to turbocharging pressure of the compressor; an accumulator connected to a downstream side of the wastegate valve in the bypass passage, wherein the accumulator is configured to accumulate exhaust gas pressure; a recirculation passage connecting the accumulator and an upstream side of the turbine; and a recirculation valve disposed on the recirculation passage, wherein the recirculation valve opens and closes an accumulation passage in accordance with an output request. ### Claim 7 (depends on 6) The turbocharging control apparatus according to claim 6, further comprising: a three-way valve disposed on the bypass passage downstream of the turbine; and an accumulation passage connecting the accumulator and the three-way valve together, wherein the three-way valve is configured to bring an upstream side of the turbine into one of the accumulation passage and a downstream side of the turbine according to internal pressure of the accumulator. ### Claim 8 (depends on 7) The turbocharging control apparatus according to claim 7, further comprising: a pilot passage through which internal pressure of the accumulator is transmitted to the three-way valve, wherein when the internal pressure introduced from the pilot passage is not less than a predetermined pressure the three-way valve brings the upstream side of the turbine into one the downstream side of the turbine, and when the internal pressure introduced from the pilot passage is less than a predetermined pressure the three-way valve brings the upstream side of the turbine into the accumulation passage. ### Claim 9 (depends on 7) The turbocharging control apparatus according to claim 7, further comprising: a check valve disposed on the accumulation passage. ### Claim 10 (depends on 8) The turbocharging control apparatus according to claim 8, further comprising: a check valve disposed on the accumulation passage. ### Claim 11 (depends on 6) The turbocharging control apparatus according to claim 6, further comprising: an electronic control unit configured to control a degree of opening of the recirculation valve, wherein when the turbocharging pressure is less than a predetermine pressure, and the output request is not less than a predetermined amount the electronic control unit increases the degree of opening of the recirculation valve, and when the turbocharging pressure is not less than the predetermine pressure and the output request is less than the predetermined amount the electronic control unit decreases the degree of opening of said recirculation valve.