# US 2013/0158835 A1 · Internal combustion engine including crankshaft that is rotated while engine is in a non-fueled mode and method of operating an engine

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- Number: US 2013/0158835 A1
- Document ID: US20130158835A1
- Status: Published application
- Kind: A1
- Application number: 13/819,328
- Filed: 2010-10-20
- Published: 2013-06-20
- Earliest claimed: 2010-10-20
- Assignees: Mack Trucks, Inc.
- Inventors: John Jerwick; John Bartel
- Web page: https://patentgrep.com/patent/US20130158835A1

## CPC

- F01M 5/025: {by prelubricating, e.g. using an accumulator}
- B60K 6/48: Parallel type
- B60K 6/485: Motor-assist type
- 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 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 20/15: Control strategies specially adapted for achieving a particular effect
- F01M 9/12: Non-pressurised lubrication, or non-closed-circuit lubrication, not otherwise provided for
- F02D 28/00: Program control of engines
- B60K 2025/005: {driven by electric motors forming part of the propulsion unit}
- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- F01M 1/20: concerning lubricant pressure
- F01M 2001/0215: {Electrical pumps}
- F01M 2005/026: {with an auxiliary pump}
- F02N 11/04: the motors being associated with current generators
- F02N 11/08: Circuits specially adapted for starting of engines
- Y02T 10/62: Hybrid vehicles
- 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
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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
- 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
- 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)
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method of operating an engine includes starting and stopping operation of an internal combustion engine that includes a crankshaft having a bearing journal and a bearing in which the bearing journal is rotatable. The crankshaft is constantly turned when the internal combustion engine is in the non-fueled mode. An oil pump can be driven to lubricate the bearing journal and the bearing while the internal combustion engine is in the non-fueled mode to provide hydrodynamic lubrication. An engine is also disclosed.

## Claims

### Claim 1

A method of operating an engine, comprising:
switching an internal combustion engine between being fueled and in a non-fueled mode, the internal combustion engine comprising a crankshaft having a bearing journal and a bearing in which the bearing journal is rotatable; and
constantly turning the crankshaft when the internal combustion engine is in the non-fueled mode.

### Claim 2 (depends on 1)

The method as set forth in claim 1, comprising turning the crankshaft through less than 360° when the internal combustion engine is in the non-fueled mode.

### Claim 3 (depends on 1)

The method as set forth in claim 1, comprising rotating the crankshaft constantly when the internal combustion engine is in the non-fueled mode.

### Claim 4 (depends on 1)

The method as set forth in claim 1, comprising driving an oil pump to lubricate the bearing journal and the bearing while the internal combustion engine is in the non-fueled mode.

### Claim 5 (depends on 4)

The method as set forth in claim 4, wherein the oil pump is mechanically connected to the crankshaft so that rotation of the crankshaft drives the oil pump.

### Claim 6 (depends on 4)

The method as set forth in claim 4, wherein the oil pump is electrically driven.

### Claim 7 (depends on 4)

The method as set forth in claim 4, comprising rotating the crankshaft while driving the oil pump so as to maintain hydrodynamic lubrication between the bearing journal and the bearing.

### Claim 8 (depends on 1)

The method as set forth in claim 1, wherein the internal combustion engine is part of a hybrid engine, the method comprising rotating the crankshaft via a mechanical connection to an electric motor of the hybrid engine.

### Claim 9 (depends on 8)

The method as set forth in claim 8, comprising rotating the crankshaft via a second electric motor powered by a battery.

### Claim 10 (depends on 1)

The method as set forth in claim 1, comprising rotating the crankshaft via an electric motor powered by a battery.

### Claim 11

An engine, comprising:
an internal combustion engine comprising a crankshaft having a bearing journal and a bearing in which the bearing journal is rotatable; and
means for constantly turning the crankshaft when the internal combustion engine is in a non-fueled mode.

### Claim 12 (depends on 11)

The engine as set forth in claim 11, wherein the engine is a hybrid engine comprising an electric motor, the rotating means comprises a mechanical connection to the electric motor.

### Claim 13 (depends on 12)

The engine as set forth in claim 12, wherein the rotating means comprises a second electric motor powered by a battery.

### Claim 14 (depends on 11)

The engine as set forth in claim 11, wherein the rotating means comprises an electric motor powered by a battery.

### Claim 15 (depends on 11)

The engine as set forth in claim 11, comprising an oil pump arranged to lubricate the bearing journal and the bearing.

### Claim 16 (depends on 15)

The engine as set forth in claim 15, comprising means for driving the oil pump while the internal combustion engine is in the non-fueled mode.

### Claim 17 (depends on 16)

The engine as set forth in claim 16, wherein the driving means comprises a mechanical connection between the oil pump and the crankshaft such that rotation of the crankshaft drives the oil pump.

### Claim 18 (depends on 16)

The engine as set forth in claim 16, wherein the driving means comprises an electrical drive.

### Claim 19 (depends on 16)

The engine as set forth in claim 16, wherein the crankshaft is rotated and the oil pump is driven so as to maintain hydrodynamic lubrication between the bearing journal and the bearing.