The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983

The Concept: An OHV + Inclined Cylinder that Changed the World of General Purpose Engines

The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983

Integrating Parts through Usage

The OHV configuration, while it offered key advantages, also necessitated more parts, a problem that was eventually solved through an exhaustive program of integration. For example, the fuel cock located between the fuel tank and carburetor serves the purpose of preventing fuel leaks during transportation and overhauling. With the ZE engine, the need for a separate fuel cock was eliminated through integration with the carburetor. Adopting the bonding technique of caulking three plates allowed the fuel tank to be mounted directly on the head, further contributing to a reduction in parts. As a result, the number of parts in the new OHV engine, which a normal design would have increased by about 20 percent, was reduced to a number even lower than found in the ME engine.

A key point in the reduction of parts, in addition to the effective ideas incorporated through new mechanisms, was that the development team had achieved such a thorough understanding of the ways general-purpose engines were used. They not only consolidated the parts from an engineering perspective, but also distinguished the necessary parts from unnecessary ones based on product usage. Their experience in field-testing had been put to maximum use. The 20 percent reduction in parts had undoubtedly led to a drop in cost, but more importantly doing so did not sacrifice the functionality of the engine. This was a real advantage for the ZE engine.

Various ideas had been adopted in order to make the OHV engine easier to handle, one such innovation being the mechanical decompression mechanism. An OHV engine offers a better compression ratio due to higher fuel-combustion efficiency. However, this leads to higher pressure, so greater force is required to start the engine. Therefore, a decompression mechanism was added in order to reduce the starting pressure. During the mechanism's development several different ideas were attempted and abandoned, since it was essential that the team avoid any patent infringements. Their effort finally led to the establishment of a proprietary Honda technology.

The Challenging Spirit of Honda

A System that Fosters Expertise
  1. A System that Fosters ExpertiseA System that Fosters Expertise
  2. The R&D Center Goes Independent / 1960The R&D Center Goes Independent / 1960
  3. Employing the "My Record" Project and Expert Certification  / 1960Employing the "My Record" Project and Expert Certification / 1960
A Dream Come True: Car Builder for the World
  1. A Dream Come True: Car Builder for the WorldA Dream Come True: Car Builder for the World
  2. Launching the S360 and T360 / 1962Launching the S360 and T360 / 1962
  3. Entering the Auto Market at Last / 1966Entering the Auto Market at Last / 1966
  4. Introducing N360 / 1967Introducing N360 / 1967
  5. Launching the Honda 1300 / 1968Launching the Honda 1300 / 1968
  6. Introducing the CVCC / 1972Introducing the CVCC / 1972
  7. Announcing the Civic / 1972Announcing the Civic / 1972
  8. Introducing the Accord / 1976Introducing the Accord / 1976
Marketing Globally, Producing Lacally
  1. Marketing Globally, Producing LocallyMarketing Globally, Producing Locally
  2. Establishing American Honda Motor Co. / 1959Establishing American Honda Motor Co. / 1959
  3. Establishing Belgium Honda / 1963Establishing Belgium Honda / 1963
  4. Establishing Honda of America Manufacturing / 1980Establishing Honda of America Manufacturing / 1980
A Refreshing New Development
  1. A Refreshing New DevelopmentA Refreshing New Development
Products Emerging From Technology and Innovation
  1. Products Emerging From Technology and InnovationProducts Emerging From Technology and Innovation
  2. The Oval Piston Engine / 1979The Oval Piston Engine / 1979
  3. The Hondamatic Transmission / 1968The Hondamatic Transmission / 1968
  4. The Car Navigation System / 1981The Car Navigation System / 1981
  5. The Airbag System / 1987The Airbag System / 1987
  6. Four-Wheel Steering System (4WS) / 1987Four-Wheel Steering System (4WS) / 1987
  7. The VTEC Engine / 1989The VTEC Engine / 1989
  8. The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977
  9. The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983
  10. The Dream CB750 FOUR / 1969The Dream CB750 FOUR / 1969
  11. CG125 / 1975CG125 / 1975
  12. Road Pal / 1976Road Pal / 1976
  13. City / 1981City / 1981
  14. The NSX / 1990The NSX / 1990
  15. Odyssey / 1994Odyssey / 1994
  16. Honda EV Plus: The Dream of an Electric Vehicle / 1988Honda EV Plus: The Dream of an Electric Vehicle / 1988
  17. The E300 Portable Generator / 1965The E300 Portable Generator / 1965
  18. The HR21 Lawn Mower / 1978The HR21 Lawn Mower / 1978
  19. The F200 "Komame" Mini-Tiller / 1980The F200 "Komame" Mini-Tiller / 1980
Production Technology: The Essence of Creative Manufacturing
  1. Production Technology: The Essence of Creative ManufaturingProduction Technology: The Essence of Creative Manufaturing
  2. Establishment of Honda Engineering / 1974Establishment of Honda Engineering / 1974
  3. The World's Smallest Welding Line / 1982The World's Smallest Welding Line / 1982
  4. Transfer Lines for Modular Components / 1981Transfer Lines for Modular Components / 1981
  5. An Automated Line for Painting and Coating / 1988An Automated Line for Painting and Coating / 1988
A Neverending Passion for Racing
  1. A Neverending Passion for RacingA Neverending Passion for Racing
  2. Completion of Suzuka Circuit / 1962Completion of Suzuka Circuit / 1962
  3. Returning to the World Motorcycle Grand Prix / 1979Returning to the World Motorcycle Grand Prix / 1979
  4. Formula One Entry: The Initial Phase / 1964Formula One Entry: The Initial Phase / 1964
  5. Formula One Entry: The Second Phase / 1983Formula One Entry: The Second Phase / 1983
  6. Entry to Champ Car Racing / 1994Entry to Champ Car Racing / 1994
  7. The Birth of Twin Ring Motegi / 1997The Birth of Twin Ring Motegi / 1997
Creativity - The Way to Work Harder, Play Harder
  1. Creativity – The Way to Work Harder, Play Harder Creativity – The Way to Work Harder, Play Harder
  2. Holding All Honda Idea Contests / 1970Holding All Honda Idea Contests / 1970
People and Society Coexisting in Harmony with Nature
  1. People and Society Coexisting in Harmony with NaturePeople and Society Coexisting in Harmony with Nature
  2. Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992
  3. Creating Hometown Forests / 1977Creating Hometown Forests / 1977
  4. Hosting "Orei-no-kai" / 1991Hosting "Orei-no-kai" / 1991

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