# US 12,000,319 B2 · Three-way catalytic converter preheating control method and system, vehicle and storage medium

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,000,319 B2
- Document ID: US12000319B2
- Status: Granted
- Kind: B2
- Application number: 18/041,801
- Filed: 2022-06-13
- Published: 2023-09-21
- Granted: 2024-06-04
- Earliest claimed: 2021-06-18
- Assignees: Zhejiang Geely Holding Group Co., Ltd.; Ningbo Geely Royal Engine Components Co., Ltd.; Aurobay Technology Co., Ltd.
- Applicants: Zhejiang Geely Holding Group Co., Ltd.; Ningbo Geely Royal Engine Components Co., Ltd.; Aurobay Technology Co., Ltd.
- Inventors: Junqi Liu; Chen Yang; Shubo Li; Rongchun Ma; Jie Chen; Xudong Sun; Yige Xiao; Ruiping Wang
- Web page: https://patentgrep.com/patent/US12000319B2

## CPC

- B60W 20/16: for reducing engine exhaust emissions
- F01N 3/2013: {using electric or magnetic heating means}
- B60L 1/12: Methods and devices for control or regulation
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- 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)}
- F01N 3/101: {Three-way catalysts}
- F01N 3/20: specially adapted for catalytic conversion (F01N3/22 takes precedence)
- F01N 3/2006: {Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating (by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235)}
- F01N 9/00: Electrical control of exhaust gas treating apparatus (monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00; conjoint electrical control of two or more combustion engine functions F02D43/00)
- B60L 2240/445: Temperature
- B60W 2510/068: Engine exhaust temperature
- B60W 2710/0694: Engine exhaust temperature
- B60W 2710/086: Power
- F01N 3/027: using electric or magnetic heating means
- F01N 3/0892: {Electric or magnetic treatment, e.g. dissociation of noxious components}
- F01N 9/005: {using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly}
- F01N 9/007: {Storing data relevant to operation of exhaust systems for later retrieval and analysis, e.g. to research exhaust system malfunctions}
- F01N 11/002: {the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus}
- F01N 11/005: {the temperature or pressure being estimated, e.g. by means of a theoretical model}
- F01N 2240/16: an electric heater, i.e. a resistance heater
- F01N 2390/02: using electric components only
- F01N 2550/22: of electric heaters for exhaust systems or their power supply
- F01N 2590/11: for hybrid vehicles
- F01N 2900/0602: Electrical exhaust heater signals
- F01N 2900/08: said parameters being related to the engine
- F01N 2900/104: Battery status
- F01N 2900/1404: Exhaust gas temperature
- F01N 2900/1602: Temperature of exhaust gas apparatus
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02T 10/12: Improving ICE efficiencies
- 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
- 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)
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The invention provides a three-way catalytic converter preheating control method and system, a vehicle and a storage medium. The includes when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than a first temperature threshold value, sending a first work instruction; the high-low pressure conversion module outputting a first working voltage according to the first working instruction so as to start preheating of a catalyst in a three-way catalytic converter; when working data of the hybrid electric vehicle meets the switching condition, sending a second working instruction to make the high-low voltage conversion module outputs a second working voltage and stops outputting the first working voltage so as to stop the electric heating. According to the invention, two working modes can be provided, and the power battery can be used for electrically heating the catalyst in advance through the high-low pressure conversion module.

## Claims

### Claim 1

A three-way catalytic converter preheating control method, characterized in that, it is applied to a hybrid vehicle and comprises:
when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than a first temperature threshold, sending a first work instruction to a high-and-low-voltage-conversion module;
the high-and-low-voltage-conversion module outputting a first working voltage to turn on the electric heating of the catalyst according to the first working instruction;
obtaining working data of the hybrid electric vehicle;
when the working data meets a switching condition, sending a second working instruction to the high-and-low-voltage-conversion module;
the high-and-low-voltage-conversion module outputting a second working voltage and stopping outputting the first working voltage according to the second working instruction to stop the electric heating;
starting an engine of the hybrid electric vehicle according to the second operating voltage;
wherein the switching condition is that the output duration of the first working voltage reaches a first-time threshold; or, the temperature of an exhaust pipe is not lower than the first temperature threshold;
wherein the first working voltage is 48V, and the second working voltage is 12V.

### Claim 2 (depends on 1)

The three-way catalytic converter preheating control method according to claim 1, characterized in that, before the step of when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than the first temperature threshold, sending the first work instruction to the high-and-low-voltage-conversion module, the method comprises:
obtaining the power of the high-voltage power battery in the hybrid electric vehicle.

### Claim 3 (depends on 1)

The three-way catalytic converter preheating control method according to claim 1, characterized in that, before the step of when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than the first temperature threshold, sending the first work instruction to the high-and-low-voltage-conversion module, the method comprises:
obtaining the power of a low-voltage battery;
when the power of the low-voltage battery is lower than the power threshold, outputting the second working voltage to charge the low-voltage battery.

### Claim 4

A three-way catalytic converter preheating control system applied to a hybrid electric vehicle, characterized in that, comprising a state acquisition module, a processing module, a high-and-low-voltage-conversion module, an electric heater module, and a power battery module, wherein the state acquisition module , the processing module, the high-and-low-voltage-conversion module and the electric heater module are connected in sequence, the power battery module connected to the high-and-low-voltage-conversion module:
the state acquisition module is configured to acquire and send the temperature of an exhaust pipe of the hybrid electric vehicle and the working data of the hybrid electric vehicle to the processing module; the processing module is configured to send a first work instruction to the high-and-low-voltage-conversion module when the temperature of the exhaust pipe of the hybrid electric vehicle is lower than a first temperature threshold, and when the work data meets a switching condition, send a second work instruction to the high-and-low-voltage-conversion module;
the high-and-low-voltage-conversion module outputs a first working voltage according to the first working instruction to enable the electric heater module to turn on electric heating of the catalyst; according to the second working instruction, outputs a second working voltage to start an engine of the hybrid electric vehicle according to the second operating voltage and stops outputting the first working voltage enables the electric heater module to stop the electric heating;
the power battery module provides a high-voltage power supply for the high-low-voltage conversion module;
wherein the switching condition is that the output duration of the first working voltage reaches a first-time threshold; or, the temperature of an exhaust pipe is not lower than the first temperature threshold;
wherein the first working voltage is 48V, and the second working voltage is 12V.

### Claim 5 (depends on 4)

The three-way catalytic converter preheating control system according to claim 4, characterized in that, the processing module is also configured to start an engine of the hybrid vehicle.

### Claim 6 (depends on 4)

The three-way catalytic converter preheating control system according to claim 4, characterized in that, the high-and-low-voltage-conversion module comprises a high-and-low voltage-conversion circuit, and the voltage conversion circuit is configured to convert the high-voltage-power-battery voltage into the first working voltage and the second working voltage.

### Claim 7 (depends on 4)

The three-way catalytic converter preheating control system according to claim 4, characterized in that, the high-and-low-voltage-conversion circuit comprises a high-and-low-voltage-conversion-switch circuit, a high frequency transformer, a 12V output circuit, a 48V output circuit, a 12V-output-and-48V-output-switching circuit.

### Claim 8 (depends on 4)

The three-way catalytic converter preheating control system according to claim 4, characterized in that, the switching condition is that the output duration of the first working voltage reaches a first-time threshold; or, the temperature of an exhaust pipe is not lower than the first temperature threshold.

### Claim 9 (depends on 4)

A vehicle, characterized in that, the vehicle comprises a vehicle body and the three-way catalytic converter preheating control system according to claim 4.

### Claim 10 (depends on 1)

A storage medium, characterized in that, a computer program is stored on the storage medium, and when the computer program is executed by a computer, the three-way catalytic converter preheating control method according to claim 1 can be realized.