1. An engine system comprising:
an engine;
hydrogen medium capable of repeating chemically storing and discharging hydrogen;
an exhaust gas pipe from said engine; and
a reactor unit bearing a catalyst;
wherein the hydrogen generated using the heat of the exhaust gas in said reactor unit or the mixture of the hydrogen and said hydrogen medium being supplied to said engine;
wherein said reactor unit includes at least first and second reactors in said exhaust gas pipe and each of said reactors comprises a partition wall disposed between an exhaust gas passage and a hydrogen medium passage; and
wherein the thermal resistance of said partition wall of said first reactor positioned on the upstream side is larger than that of said second reactor positioned on the downstream side and said hydrogen medium is supplied to said second reactor from said first reactor.
2. An engine system comprising:
an engine;
hydrogen medium capable of repeating chemically storing and discharging hydrogen;
an exhaust gas pipe from said engine; and
a reactor bearing a catalyst;
wherein the hydrogen generated using the heat of exhaust gas in said reactor unit or the mixture of the hydrogen and said hydrogen medium being supplied to said engine;
wherein said reactor arranged in said exhaust gas pipe includes a partition wall disposed between an exhaust gas passage and a hydrogen medium passage in said reactor, and the thermal resistance of said partition wall on the inlet side of said exhaust gas is larger than that of the outlet side of said exhaust gas pipe.
3. An engine system comprising:
an engine;
hydrogen medium capable of repeating chemically storing and discharging hydrogen;
an exhaust gas pipe from said engine; and
a reactor bearing a catalyst;
wherein the hydrogen generated using the heat of exhaust gas in said reactor unit or the mixture of the hydrogen and said hydrogen medium being supplied to said engine;
wherein said reactor is provided in said exhaust gas pipe, and a partition wall disposed between an exhaust gas passage and a hydrogen medium passage in said reactor, and the thickness of said partition wall on the inlet side of said exhaust gas pipe is larger than that of outlet side of said exhaust gas pipe.
4. The engine system according to claim 2, wherein said partition wall of said reactor is structured with materials at least two kinds of materials, and thermal conductivity of the material of said partition wall on the out side is higher than that of the inlet side of said exhaust gas.
5. The engine system according to claim 1, further comprising a carburetor disposed on the downstream side of said second reactor and performing heat exchange between the hydrogen medium and exhaust gas,
wherein the hydrogen medium is supplied in order of said carburetor, said first reactor, and said second reactor, and the heat exchange at least in one reactor is parallel current.
6. The engine system according to claim 1, further comprising a by-pass exhaust gas pipe branched from said exhaust gas pipe on the upstream side of said reactor and a flow rate limiting valve disposed downstream than the middle point of said by-pass exhaust gas pipe.
7. The engine system according to claim 2, further comprising a by-pass exhaust gas pipe branched from said exhaust gas pipe on the upstream side of said reactor and a flow rate limiting valve disposed downstream than the middle point of said by-pass exhaust gas pipe.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A single-pass ink jet printing head comprising
an array of ink jet outlets sufficient to cover a target width of a print substrate at a predetermined resolution, and
orifice plates, each of the orifice plates having orifices, each of the orifice plates serving some but not all of the area to be printed,
the orifices being arranged in a pattern such that adjacent parallel lines on the print medium are served by orifices that have different positions in the array along the direction of the print lines, that are separated by a distance that is at least an order of magnitude greater than the distance between adjacent orifices in a direction perpendicular to the print line direction.
2. The head of claim 1 in which each of the orifice plates is associated with a print head module that prints a swath along the substrate, the swath being narrower than the target width of the substrate.
3. The head of claim 1 in which the number of orifices in each of the orifice plates is within a range of 250 to 4000, preferably between 1000 and 2000, most preferably about 1500.
4. The head of claim 1 in which there are no more than five swath arrays to cover the entire target width.
5. The head of claim 1 in which there are three swath arrays.