1
Shinichi Nakano, Hiroyuki Kawakubo, Toshio Shimada, Hiroshi Wakoh: Engine balancing and improvements thereof. Honda Giken Kogyo Kabushiki Kaisha, Lyon & Lyon, June 15, 1993: US05218885 (17 worldwide citation)

This invention is concerned with an improved system of dynamic balancing of the primary and secondary vibrations associated with combustion and inertial momentum effects, in particular, in single cylinder engines. By means of the primary and secondary balancing shafts, the invention achieves maximum ...


2
Atsushi Sawa, Hiroyuki Kawakubo: Arrangement of oil passage to valve system. Honda Giken Kogyo Kabushiki Kaisha, Birch Stewart Kolasch & Birch, December 31, 1996: US05588405 (14 worldwide citation)

An arrangement of oil passages to a valve system can reduce the number of parts required thereby lowering the manufacturing cost. The oil passages to a valve system of an internal combustion engine are integrally formed with the cylinder block and a cylinder head. These oil passages are arranged alo ...


3
Hiroyuki Kawakubo, Toru Gunji: Engine crankcase structure. Honda Motor, Birch Stewart Kolasch & Birch, September 12, 2006: US07104239 (14 worldwide citation)

To miniaturize an engine, to concentrate heavy masses and to reduce friction loss of a balancer. An engine crankcase structure in which a crankcase is vertically partitioned into an upper case and a lower case, each journal supporter is formed in the upper case and in the lower case so that the rota ...


4
Hiroyuki Kawakubo, Toru Gunji: Speed change gear drive for transmission. Honda Motor, Hamre Schumann Mueller & Larson PC, February 13, 2007: US07174800 (8 worldwide citation)

The invention relates to a speed change gear drive for a transmission that can miniaturize an engine by improving the layout of parts. In particular, the invention relates to a speed change gear drive in which a change spindle is supported by a transmission case and a shift drum supported by the tra ...


5
Hiroyuki Kawakubo, Toru Gunji: Powertrain assembly including modular transmission. Honda Motor, Carrier Blackman & Associates P C, William D Blackman, Joseph P Carrier, April 3, 2007: US07198021 (8 worldwide citation)

A powertrain assembly having an improved engine configuration includes an engine and a transmission incorporated in a crankcase of the engine. The engine also comprises an oil pump and a water pump. The transmission is a cartridge-type shift drum transmission, which can be attached to or detached fr ...


6
Eiji Ito, Tetsushi Suzuki, Kaoru Ito, Hiroyuki Kawakubo: Positive crank ventilation apparatus for an engine system. Toyota Jidosha Kabushiki Kaisha, Kenyon & Kenyon, March 19, 1996: US05499604 (7 worldwide citation)

In a supercharged engine, a supercharger and a throttle body disposed midway in an intake passage are located away from an engine block. A blow-by gas passage constituting a PCV apparatus is connected between a portion of the intake passage located on the upstream side of a throttle valve and a cran ...


7
Toru Gunji, Hiroyuki Kawakubo, Hisao Otsuka: Threaded fastener for an internal combustion engine, and internal combustion engine incorporating same. Honda Motor, Carrier Blackman & Associates P C, William D Blackman, Joseph P Carrier, December 6, 2005: US06971362 (6 worldwide citation)

A threaded fastener is configured to reduce stress experienced at a female threaded portion of a hole formed in an engine block, when the threaded fastener is inserted therein, and when an axial load is applied thereto. In a particular application, a crankshaft is supported between a top supporting ...


8
Hiroyuki Kawakubo, Toru Gunji, Hiromi Sumi: Engine having a cartridge type transmission. Honda Motor, Birch Stewart Kolasch & Birch, August 29, 2006: US07096753 (6 worldwide citation)

The cartridge type transmission is a transmission configured to be detachable and attachable from/to the crankcase, the main shaft is arranged on the cut surface BF of the crankcase, and the change spindle and the shift fork shaft are pivotally supported in the upper crankcase, which is positioned o ...


9
Hiroyuki Kawakubo, Tadashi Katoh, Atsushi Ogasawara: Engine with balancer device for vehicle. Honda Giken Kogyo Kabushiki Kaisha, Birch Stewart Kolasch & Birch, October 5, 1999: US05960761 (6 worldwide citation)

To suitably keep the weight balance of an engine while reducing a radial dimension of the engine. A crank shaft and a transmission shaft are supported in casings and are disposed to be substantially parallel to each other. A rear balancer and a front balancer are disposed with the crank shaft placed ...


10
Hiroyuki Kawakubo, Toru Gunji, Hiroshi Nakagome, Toshihisa Nagashii: Vehicle engine. Honda Motor, Birch Stewart Kolasch&Birch, June 6, 2006: US07055487 (5 worldwide citation)

To facilitate attachment/detachment work of an oil filter in a vehicle engine without increasing an outer dimension thereof, and to provide a uniform a supply of engine oil into an engine body. An oil filter is attached onto a front portion of the engine body so as to be detachable in a vehicle body ...