Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1975-11-10
1976-10-12
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60284, 60301, F02B 7510
Patent
active
039849759
ABSTRACT:
A V-type internal combustion engine has left and right exhaust manifolds interconnected by an exhaust crossover passage and connected by left and right exhaust pipes respectively to a main catalytic converter. The left exhaust pipe has an auxiliary catalytic converter, while the right exhaust pipe has a valve which is closed during engine warm-up. The valve diverts exhaust gases from the right exhaust manifold through the crossover passage to the left exhaust manifold for flow through the auxiliary converter and the left exhaust pipe to the main converter during warm-up and permits exhaust gases to flow directly from the right exhaust manifold to the main converter during normal operation. A pump delivers air into the right exhaust manifold for delivery through the auxiliary converter to the main converter during engine warm-up and for delivery directly to the main converter during normal operation, thus limiting oxidation in the auxiliary converter.
REFERENCES:
patent: 1761960 (1930-06-01), Armitage
patent: 3744248 (1973-07-01), Foster
patent: 3767764 (1973-10-01), Dolbear
patent: 3791143 (1974-02-01), Keith
patent: 3824788 (1974-07-01), Cole
General Motors Corporation
Hart Douglas
Veenstra C. K.
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