# US 9,039,568 B2 · Methods and systems for extending regenerative braking

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- Number: US 9,039,568 B2
- Document ID: US9039568B2
- Status: Granted
- Kind: B2
- Application number: 13/776,303
- Filed: 2013-02-25
- Published: 2013-11-07
- Granted: 2015-05-26
- Earliest claimed: 2012-05-04
- Assignees: Ford Global Technologies, LLC
- Applicants: Ford Global Technologies, LLC
- Inventors: Adam Nathan Banker; Alex O'Connor Gibson; Jeffrey Allen Doering; James William Loch McCallum; David Oshinsky
- Web page: https://patentgrep.com/patent/US9039568B2

## CPC

- B60W 20/12: using control strategies taking into account route information {(estimation or calculation of non-directly measurable driving parameters B60W40/00)}
- B60L 8/003: {Converting light into electric energy, e.g. by using photo-voltaic systems}
- B60L 15/2009: {for braking}
- B60L 15/2045: {for optimising the use of energy}
- B60L 15/2081: {for drive off on a slope}
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60L 58/12: responding to state of charge [SoC]
- B60L 58/15: Preventing overcharging
- B60W 10/02: including control of driveline clutches
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 10/10: including control of change-speed gearings
- B60W 10/11: Stepped gearings
- B60W 10/115: with planetary gears
- B60W 10/196: acting within the driveline, e.g. retarders
- B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- B60W 20/14: in conjunction with braking regeneration
- B60W 20/20: Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
- B60W 20/30: Control strategies involving selection of transmission gear ratio {(control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H)}
- B60W 30/18027: {Drive off, accelerating from standstill}
- B60W 30/18127: {Regenerative braking}
- B60W 30/18136: {Engine braking}
- B60L 7/18: Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence)
- B60L 2240/12: Speed
- B60L 2240/421: Speed
- B60L 2240/423: Torque
- B60L 2240/441: Speed
- B60L 2240/443: Torque
- B60L 2240/507: Operating parameters
- B60L 2240/622: by satellite navigation
- B60L 2240/72: Charging station selection relying on external data
- B60L 2250/26: by pedal actuation
- B60L 2260/52: drive range estimation, e.g. of estimation of available travel distance
- B60L 2260/54: Energy consumption estimation
- B60W 10/00: Conjoint control of vehicle sub-units of different type or different function (for propulsion of purely electrically-propelled vehicles with power supplied within the vehicle B60L50/00 - B60L58/00)
- 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)}
- B60W 30/00: Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W 2510/244: Charge state
- B60W 2552/15: Road slope, i.e. the inclination of a road segment in the longitudinal direction
- B60W 2710/06: Combustion engines, Gas turbines
- B60W 2710/08: Electric propulsion units
- B60Y 2400/216: by solar panels
- Y02T 10/62: Hybrid vehicles
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- Y02T 10/90: Energy harvesting concepts as power supply for auxiliaries' energy consumption, e.g. photovoltaic sun-roof
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- Y10S 903/902: Prime movers comprising electrical and internal combustion motors
- Y10S 903/93: Conjoint control of different elements
- Y10S 903/946: Characterized by control of driveline clutch
- Y10S 903/947: Characterized by control of braking, e.g. blending of regeneration, friction braking
- 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
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an electrical load may be automatically activated to consume electrical energy produced during driveline braking so that driveline braking may be extended. The electrical load may be a windscreen heater or other device.

## Claims

### Claim 1

A method for controlling driveline braking, comprising:
providing driveline braking via an electric machine while rotation of an engine is stopped, the electric machine providing negative torque equivalent to an amount of torque the engine provides during deceleration fuel shut off while providing driveline braking; and
automatically activating a device to consume charge provided via the electric machine while the electric machine is providing driveline braking and the engine is stopped and remains stopped.

### Claim 2 (depends on 1)

The method of claim 1, where the device is activated in response to a state of charge of an electric storage device exceeding a threshold level.

### Claim 3 (depends on 1)

The method of claim 1, where the device is a heating device, where a disconnect clutch is opened to stop the engine, and where a torque converter clutch capacity is modulated to reduce disconnect clutch opening torque disturbances.

### Claim 4 (depends on 3)

The method of claim 3, where the heating device is a window defroster.

### Claim 5 (depends on 3)

The method of claim 3, where the heating device is an emission device heater.

### Claim 6 (depends on 1)

The method of claim 1, where the device is a pump.

### Claim 7 (depends on 6)

The method of claim 6, where the pump is a fuel injection pump.

### Claim 8

A method for controlling driveline braking, comprising:
providing driveline braking via an electric machine while rotation of an engine is stopped, the electric machine providing negative torque equivalent to an amount of torque the engine provides during deceleration fuel shut off while providing driveline braking; and
increasing current supplied to a device while the electric machine is providing driveline braking while rotation of the engine is stopped and remains stopped.

### Claim 9 (depends on 8)

The method of claim 8, where the current increase is based on a rate of charge being output by the electric machine.

### Claim 10 (depends on 8)

The method of claim 8, where the electric machine is providing charge to an energy storage device while the electric machine is providing driveline braking.

### Claim 11 (depends on 8)

The method of claim 8, where the current increase is based on a state of charge of an energy storage device.

### Claim 12 (depends on 8)

The method of claim 8, where the device is a pump.

### Claim 13 (depends on 8)

The method of claim 8, where device is a heater.

### Claim 14 (depends on 8)

The method of claim 8, where the device is a light.