- Biển số
- Ngày cấp bằng
- Số km
- Động cơ
- 10 Mã lực
Một số biến thể của các piston hoặc ngược OP thiết kế sử dụng một crankshaft như Doxford tàu động cơ và các commer OP động cơ xe. Chúng ta không nên nhầm lẫn với động cơ căn hộ chung cư. Mặc dù đôi khi là động cơ căn hộ chung cư được gọi là theo chiều ngang ngược, họ là máy móc rất khác nhau.Cái này dịch ra nôm na là "động cơ piston đấu đầu" ạ (Opposed Piston Engine).
Các xem tạm bằng tiếng Ăng Lê nhá. Em hiểu sơ sơ nên ứ dịch nổi, mấy lại nó dài quá :102:
Some variations of the Opposed Piston or OP designs use a single crankshaft like the Doxford ship engines and the Commer OP truck engines. They should not be confused with flat engines. Though flat engines are sometimes referred to as horizontally opposed, they are very different mechanically.
A more common layout uses 2 crankshafts, with the crankshafts geared together, or even 3 geared crankshafts in the Napier Deltic diesel engines. The Deltic uses three crankshafts serving three banks of double-ended cylinders arranged in an equilateral triangle, with the crankshafts at the corners. These were used in railway locomotives and to power fast patrol boats. Both types are now largely obsolete, although the Royal Navy still maintains some Deltic-powered Hunt Class Mine Countermeasure Vessels.
The first opposed-piston diesel engines were developed in the beginning of 20th century. In 1907, Raymond Koreyvo, the engineer of Kolomna Works, patented and built opposed-piston two-stroke diesel with two crankshafts, connected by gearing. Although Koreyvo patented his diesel in France in November, 1907, the direction would not go on to manufacture opposed-piston engines.
An April, 1950 print advertisement for Fairbanks-Morse opposed piston engines, touting their greater thermodynamic efficiency and lower maintenance cost than standard configurations
The first Junkers engines had one crankshaft, the upper pistons having long connecting rods outside the cylinder. These engines were the forerunner of the Doxford marine engine, and this layout was also used for two- and three-cylinder car engines from around 1900 to 1922 by Gobron-Brillie. There is currently a resurgence of this design in a boxer configuration as a small diesel aircraft engine, and for other application, called the 'OPOC' engine by Advanced Propulsion Technologies, Inc. of California. Later Junkers engines like the Junkers Jumo 205 diesel aircraft engine, use two crankshafts, one at either end of a single bank of cylinders. There are efforts to reintroduce the opposed-piston diesel aircraft engine with twin geared crankshafts for General aviation applications, by both Dair and PowerPlant Developments in the UK.
This configuration has also been used for marine auxiliary generators and for larger marine propulsion engines, notably Fairbanks-Morse diesel engines used in both conventional and nuclear US submarines. Fairbanks-Morse also used it in diesel locomotives starting in 1944. With the addition of a supercharger or turbocharger, opposed piston designs can make very efficient two-stroke cycle Diesel engines. Attempts were made to build non-diesel 4-stroke engines, but as there is no cylinder head, the bad location of the valves and the spark plug makes them inefficient.
Koreyvo, Jumo and Deltic engines used one piston per cylinder to expose an intake port, and the other to expose an exhaust port. Each piston is referred to as either an intake piston or an exhaust piston depending on its function in this regard. This layout gives superior scavenging, as gas flow through the cylinder is axial rather than radial, and simplifies design of the piston crowns. In the Jumo 205 and its variants, the upper crankshaft serves the exhaust pistons, and the lower crankshaft the intake pistons. In designs using multiple cylinder banks, such as the Junkers Jumo 223 and the Deltic, each big end bearing serves one inlet and one exhaust piston, using a forked connecting rod for the exhaust piston.
The Doxford Engine Works of the UK designed and built very large opposed-piston engines for marine use. These engines differ in design from Jumo and Fairbanks-Morse engines by having external connecting rods outside the cylinder linking the upper and lower pistons, thus requiring only a single crankshaft. The first engine of this type was developed by Karl Otto Keller in 1912. Doxford obtained a sole UK license from Oechelhauser and Junkers to build this design of engine. After World War I these engines were produced in a number of models, such as the P and J series, with outputs as high as 20000 hp. Certain models were license-built in the US. Production of Doxford engines in the UK ceased in 1980.
1 intake cho nhiên liệu hỗn hợp không khí -Ảnh minh họa nó thế này ạ
1 intake for the fuel-air mixture
2 supercharger (here: rotary vane pump; original: Centrix)
3 airbox to buffer and distribute the mixture
4 waste valve to limit the pressure level
5 outlet crank mechanism
6 inlet crank mechanism (runs app. 20° past the outlet to achieve an asymmetric control diagram)
7 cylinder with inlet and outlet slots
9 water cooling jacket
Hình như không phải cái này bác àh, cái nhà voiz post là động cơ đối đầu, cùa nhà bác là đối đuôi, mấy em Side Uran hay dùng kiểu động cơ này.Động cơ đối đỉnh ở ta có nhiều người dùng xe cổ hay có, nhà em có 2 chiếc .
Làm mát bằng không khí , 4 máy bố trí hình chữ H , rất nhiều OFer đã cưỡi rồi .