초록 ▼

An internal combustion engine having a turbo-supercharger and a catalytic exhaust gas purifying device located downstream of the exhaust gas turbine. The exhaust passage is provided with a bypass passage in parallel with the exhaust gas turbine and a valve is provided for opening the bypass passage

An internal combustion engine having a turbo-supercharger and a catalytic exhaust gas purifying device located downstream of the exhaust gas turbine. The exhaust passage is provided with a bypass passage in parallel with the exhaust gas turbine and a valve is provided for opening the bypass passage when the engine operating temperature is below a predetermined value so that the exhaust gas is passed through the bypass passage to the catalytic device. This arrangement is effective to heat the catalytic device rapidly to a working temperature.

대표청구항 ▼

An internal combustion engine including intake passage means and exhaust passage means, a turbo-supercharger comprised of exhaust gas turbine means provided in said exhaust gas passage means and compressor means provided in said intake passage means, first catalytic exhaust gas purifying means provi

An internal combustion engine including intake passage means and exhaust passage means, a turbo-supercharger comprised of exhaust gas turbine means provided in said exhaust gas passage means and compressor means provided in said intake passage means, first catalytic exhaust gas purifying means provided in said exhaust gas passage means downstream of the exhaust gas turbine means, bypass passage means having one end connected with said exhaust gas passage means upstream of the exhaust gas turbine means and the other end with the exhaust gas passage means between the exhaust gas turbine means and the first catalytic exhaust gas purifying means, valve means for controlling said bypass passage means, temperature responsive control means for actuating said valve means to open the bypass passage means when engine operating temperature is below a predetermined value so that at least a part of engine exhaust gas is passed through the bypass passage means to the first catalytic exhaust gas purifying means, and second catalytic exhaust gas purifying means provided in said bypass passage means and having a smaller capacity than said first catalytic exhaust gas purifying means.