# US 2017/0284510 A1 · Dual clutch transmission

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- Number: US 2017/0284510 A1
- Document ID: US20170284510A1
- Status: Published application
- Kind: A1
- Application number: 15/472,841
- Filed: 2017-03-29
- Published: 2017-10-05
- Earliest claimed: 2016-03-31
- Assignees: Kanzaki Kokyukoki Mfg. Co., Ltd.
- Applicants: Kanzaki Kokyukoki Mfg. Co., Ltd.
- Inventors: Koji IWAKI; Jun MATSUURA; Nobuhiro SHIMOBAYASHI; Daisuke MURASHIMA; Tetsuya KAWATANI; Shuji NISHIMOTO; Tatsuya KAMADA; Takehiro OTA
- Web page: https://patentgrep.com/patent/US20170284510A1

## CPC

- F16H 3/006: {power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions}
- B60K 17/02: characterised by arrangement, location, or kind of clutch
- B60K 17/344: having a transfer gear
- B60K 17/348: having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed (B60K17/346 takes precedence)
- F16D 25/0638: with more than two discs, e.g. multiple lamellae
- F16D 25/10: Clutch systems with a plurality of fluid-actuated clutches (arrangements or mounting of clutches in vehicles B60K17/00)
- F16D 25/123: {in view of cooling and lubrication}
- F16D 48/0206: {in a system with a plurality of fluid-actuated clutches}
- F16D 48/062: {of a clutch system with a plurality of fluid actuated clutches}
- F16H 57/031: characterised by covers or lids for gearboxes
- F16H 57/0435: {Pressure control for supplying lubricant; Circuits or valves therefor}
- F16H 57/0446: {the supply forming part of the transmission control unit, e.g. for automatic transmissions}
- F16H 57/0473: {Friction devices, e.g. clutches or brakes}
- B60K 2025/022: {by a mechanical transmission}
- B60Y 2200/20: Off-Road Vehicles
- B60Y 2300/42: Control of clutches
- B60Y 2400/424: Friction clutches
- F16D 2500/1045: Friction clutch
- F16H: GEARING
- 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
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

A dual clutch transmission comprises a housing formed therein with a gear chamber incorporating an odd-numbered speed gear train group and an even-numbered speed gear train group. An end of the input shaft is connected to an engine, and a cover is detachably attached to the housing opposite the end of the input shaft so as to define a clutch chamber divided from the gear chamber. A first clutch for the odd-numbered speed gear train group and a second clutch for the even-numbered speed gear train group are disposed in the clutch chamber. Fluid passages for supplying hydraulic fluid to the first and second clutches are formed in the cover.

## Claims

### Claim 1

A dual clutch transmission comprising:
an input shaft;
an output shaft;
an odd-numbered speed gear train group including at least one odd-numbered speed gear train for transmitting power from the input shaft to the output shaft;
an even-numbered speed gear train group including at least one even-numbered speed gear train for transmitting power from the input shaft to the output shaft;
a first clutch for selectively making or interrupting power transmission from the input shaft to the output shaft via any one odd-numbered speed gear train selected from the odd-numbered speed gear train group;
a second clutch for selectively making or interrupting power transmission from the input shaft to the output shaft via any one even-numbered speed gear train selected from the even-numbered speed gear train group;
a housing including first and second end portions mutually opposite in an axial direction of the input shaft, the housing being formed therein with a gear chamber close to the first end portion of the housing, and with a clutch chamber close to the second end portion of the housing,
wherein the input shaft, the output shaft, the odd-numbered speed gear train group, and the even-numbered speed gear train group are disposed in the gear chamber,
wherein the first clutch and the second clutch are disposed in the clutch chamber,
wherein a first end portion of the input shaft projects outward from the first end portion of the housing so as to be connected to a prime mover, and a second end portion of the input shaft is extended into the clutch chamber so as to be connected to the first and second clutches, and
wherein the clutch chamber has an opening at the second end portion of the housing; and
a cover detachably attached to the second end portion of the housing so as to close the opening of the clutch chamber.

### Claim 2 (depends on 1)

The dual clutch transmission according to claim 1,
wherein the first and second clutches are hydraulic clutches,
wherein the cover is formed therein with a fluid passage for supplying fluid to the first and second clutches, and
wherein the dual clutch transmission further comprises electromagnetic valves for controlling the fluid supply to the first and second clutches, the electromagnetic valves being provided on the cover.

### Claim 3 (depends on 1)

The dual clutch transmission according to claim 1,
wherein one of the first and second clutches is disposed in the clutch chamber above the second end portion of the input shaft so as to be drivingly connected to the odd-numbered or even-numbered gear train selected from one of the odd-numbered and even-numbered gear train groups, and
wherein the other of the first and second clutches is disposed in the clutch chamber sideward from the second end portion of the input shaft so as to be drivingly connected to the odd-numbered or even-numbered gear train selected from the other of the odd-numbered and even-numbered gear train groups.

### Claim 4 (depends on 3)

The dual clutch transmission according to claim 3,
wherein the first and second clutches are hydraulic clutches,
wherein the cover is formed therein with a fluid passage for supplying fluid to the first and second clutches, and
wherein the dual clutch transmission further comprises electromagnetic valves for controlling the fluid supply to the first and second clutches, the electromagnetic valves being provided on the cover.