# US 8,770,327 B2 · Accessory drive mechanism for hybrid vehicle

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- Number: US 8,770,327 B2
- Document ID: US8770327B2
- Status: Granted
- Kind: B2
- Application number: 13/517,047
- Filed: 2010-11-05
- Published: 2012-10-25
- Granted: 2014-07-08
- Earliest claimed: 2009-12-18
- Assignees: Ud Trucks Corporation
- Applicants: Yoshiaki Yamada; Takayuki Tsuchiya; Kunihiko Hikiri
- Inventors: Yoshiaki Yamada; Takayuki Tsuchiya; Kunihiko Hikiri
- Web page: https://patentgrep.com/patent/US8770327B2

## CPC

- G16Z 99/00: Subject matter not provided for in other main groups of this subclass
- B60K 6/383: One-way clutches or freewheel devices
- B60K 6/48: Parallel type
- B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors}
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- 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)}
- 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
- G16Z: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An accessory drive mechanism for a hybrid vehicle, capable of operating accessories irrespective of the travel state of the vehicle, and also capable of smoothly switching between the power which is transmitted from the traveling motor side and the power which is transmitted from the accessory drive motor side. The accessory drive mechanism is provided with a drive power take-off mechanism (20) for taking out the power from a travel drive system (D). An accessory (11) is connected to the drive power take-off mechanism (20). A first one-way clutch (C1) which can transmit the power only to the accessory (11) side is disposed between the drive power take-off mechanism (20) and the accessory (11). An accessory driving motor (an auxiliary motor (12e)) is connected to the side of the accessory (11) which is on the opposite side from the drive power take-off mechanism (20). A second one-way clutch (C2) which can transmit the power only to the accessory (11) side is disposed between the accessory (11) and the accessory driving motor (12).

## Claims

### Claim 1

An accessory drive mechanism for a hybrid vehicle, wherein a drive power take-off mechanism, which takes out a power from a traveling drive system including an engine and a traveling motor by means of a wrapping-type transmission mechanism, is provided, an accessory is connected to the drive power take-off mechanism via a gearbox, an output shaft of the drive power take-off mechanism and an output shaft of an accessory driving motor are connected to the gearbox, a first braking device is interposed in an output shaft of the drive power take-off mechanism, a second braking device is interposed in the output shaft of the accessory driving motor, a revolution measurement device which measures a number of revolutions of the traveling drive system and a control device are provided, a measurement result of the revolution measurement device is input to the control device, and the control device has functions of stopping the accessory driving motor, operating the second braking device and releasing the first braking device in a case that a number of revolutions transmitted from the traveling drive system is not lower than a predetermined number of revolutions and functions of driving the accessory driving motor, operating the first braking device and releasing the second braking device in a case that a number of revolutions transmitted from the traveling drive system is lower than the predetermined number of revolutions.

### Claim 2 (depends on 1)

The accessory drive mechanism for a hybrid vehicle according to claim 1, wherein the output shaft of the drive power take-off mechanism and the output shaft of the accessory driving motor are coaxially arranged in the gearbox, the gearbox comprises: a ring gear including internal teeth therein and being provided at an output shaft end portion of the drive power take-off mechanism; a plurality of planetary gears including external teeth which engage with the internal teeth of the ring gear; a sun gear including external teeth which engage with the external teeth of the planetary gears; and a planetary gear carrier connecting to rotation centers of the planetary gears, the sun gear is provided at an output shaft end portion of the accessory driving motor, the planetary gear carrier includes a rotating shaft which is coaxial with the output shaft of the accessory driving motor and can rotate relatively to the output shaft of the accessory driving motor, external teeth are formed on an outer edge portion in a radial direction of the planetary gear carrier 32c, the accessory drive mechanism includes a first gear being externally engaged with the external teeth of the planetary gear carrier, and a rotating shaft of the first gear is connected to a pump for driving power steering and a compressor for supplying compressed air.