Internal-combustion engines – Starting device – Condition responsive control of starting device
Reexamination Certificate
2006-09-19
2008-12-09
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Starting device
Condition responsive control of starting device
C123S179300
Reexamination Certificate
active
07461621
ABSTRACT:
There is provided a method of starting a spark ignition engine having multiple cylinders. The method comprises supplying air and fuel for restart into a first cylinder before the engine completely stops, and igniting the mixture of the air and the fuel in the first cylinder in response to an engine start request. In accordance with the method, by supplying air and fuel into the first cylinder before the engine completely stops, the mixture of air and fuel in the first cylinder may be homogeneous at the time of the engine start request. Also, there may be less mixture turbulence and combustion may propagate better within the cylinder. These conditions may reduce the rate of combustion in the first cylinder after a start request is initiated. The slower combustion rate may decrease temperature of the combusted gas while the cylinder wall temperature is relatively low because the engine has stopped. As a result, the slower combustion may reduce heat loss in the first cylinder because of the smaller difference between the temperatures of the combusted gas and the cylinder wall. Consequently, more energy may be directed from the first cylinder to the crankshaft, so that the engine restart becomes more reliable.
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European Patent Office, European Search Report of EP06019782, Apr. 28, 2008, EPO.
Araki Keiji
Fujimoto Masahiko
Murakami Yasushi
Ota Noriyuki
Yokota Kazuya
Alleman Hall McCoy Russell & Tuttle LLP
Cronin Stephen K.
Leung Ka Chun
Mazda Motor Corporation
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