Combustion engine system

• US 4,665,704 A
• Filed: 09/10/1985
• Issued: 05/19/1987
• Est. Priority Date: 10/01/1984
• Status: Expired due to Fees

• Current Assignee: Institut Cerac SA
• Original Assignee: Institut Cerac SA
• Inventors: Hartwig, Carl S. M.
• Primary Examiner(s): Koczo, Michael
• Application Number:
  US06/774,313
• Time in Patent Office: 616 Days
• Field of Search: 60/597, 60/598, 60/605, 60/624
• US Class Current: 60/597
• CPC Class Codes: F02B 37/001 using exhaust drives arranged in parallel
• CPC Class Codes: F02B 37/005 Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator
• CPC Class Codes: F02B 41/10 in exhaust turbines use of exhaust turbines for charging F02B37/00
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An internal combustion engine (11) including a turbocharger system comprising a supercharger compressor (16) connected to the intake manifold (12) of the engine driven by a first turbine (15) mounted on a common shaft (21) with the compressor and connected to the engine exhaust manifold (13). Surplus exhaust gas is passed to a second turbine (17) which drives an electric generator (18) for generating power to energize auxiliary equipment such as an electric motor (20). The loading and unloading of the generator is controlled by sensor and switch means (25, 19) in response to torque output demands, to thereby reduce the pressure ratio over the second turbine with consequent increase in back pressure and thus increase the pressure ratio over the first turbine with consequent boosting of the supercharging capacity of the compressor upon demand for increased torque output of the engine. Conversely, the pressure ratio over the first turbine is decreased and the pressure ratio over the second turbine is increased at low torque output demand, such as high engine speed, to thereby boost the generating capacity of the generator.

Claims

1. In an internal combustion engine (11) having an intake manifold (12), an exhaust manifold (13) and a power takeoff shaft (14), a turbocharging system comprising:

(a) a supercharger compressor (16) connected to the intake manifold of the engine for delivering thereto a supercharged fuel charge;

(b) a first turbine (15) connected to the exhaust manifold of the engine and mounted on a common shaft (21) with said compressor;

(c) a second turbine (17) driven by surplus exhaust gas from said first turbine;

(d) an electric generator (18) driven by said second turbine (17) for energizing auxiliary equipment connected to said engine;

(e) regulator means (19) for controlling the output of said generator;

(f) sensor means (25) for sensing the torque output demands of said engine and connected to said regulator means (19); and

(g) said regulator means (19) being responsive to said sensor means (25) to regulate the load on said generator to increase the back pressure on said second turbine (17) upon increased torque output demand to thereby boost the supercharging capacity of said first turbine (15) and said compressor (16) and upon reduced torque output demand to decrease the back pressure on said second turbine (17) to thereby boost the generating capacity of said generator (18).

2. An internal combustion engine according to claim 1, in which said auxiliary equipment comprises an electric motor (20) connected to said power takeoff shaft (14).