A permanent magnet alternator is adapted to be connected to an engine and has a stator, a driven plate, and a rotor. The stator is mounted on the engine. The driven plate is connected to an output shaft in front of the engine and covers the stator. Multiple ventilation holes are formed through the driven plate such that air can remove heat from the stator via the ventilation holes. The rotor is fixed in the rotor recess and has a magnet-mounting ring and multiple magnets. The magnets are mounted on the magnet-mounting ring. An annular radial gap is formed between the magnetic mounting ring and a wall of the rotor recess. The magnet-mounting ring is fixed to the driven plate using ring fasteners such that radial position of the magnet-mounting ring can be adjusted. Therefore, the alternator vibrates less, has better heat dissipation and reduces weight.

An example hybrid power system includes a mobile platform comprising: a generator set comprising: a reciprocating engine configured to convert natural gas into rotational mechanical energy; and a generator configured to convert rotational mechanical energy sourced from the reciprocating engine into electrical energy; an electrical energy storage system (ESS) configured to store electrical energy; an electrical motor configured to convert electrical energy sourced from a combination of the generator set and the ESS into rotational mechanical energy; and a pump configured to operate using rotational mechanical energy sourced from the electrical motor.

The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units.

Systems and methods for preventing activation of a starter when engine speed is above a threshold engine speed value are disclosed. In examples, an engine driven power system includes an engine and a current transformer to generate an induced current in response to an excitation current from an excitation circuit. As the excitation current is induced in response to rotational movement of the engine, the excitation current and the induced current exhibits characteristics corresponding to engine speed. A control circuit receives a signal from the current transformer representing characteristics representative of engine speed and determines the engine speed, compares the characteristics to a list of values that correlates current characteristics to engine speed, compare a list of threshold engine speed values to the calculated engine speed value, and prevents activation of an engine starter if the control circuitry determines that the engine speed exceeds the threshold engine speed value.

A synchronous dynamometer assembly for applying a load to an engine during at least one portion of the combustion cycle of the engine in a synchronised manner so as to be repeatable each cycle of the engine comprises a dynamometer having a non-inductive load which is applied to the engine during operation to vary the speed of the engine. The non-inductive load is variable by varying the current delivered to it. Crankshaft monitoring means monitors the rotational position of the engine crankshaft, and combustion detection means detects a combustion event in a cylinder of the engine. Control means is operatively connected to the dynamometer for applying the load from the dynamometer to the engine for at least one part of the combustion cycle in real time such that the different loads may be applied to the engine for different parts of the combustion cycle.

A bottoming cycle power system includes a turbo-expander operable to rotate a turbo-crankshaft as a flow of exhaust gas from a combustion process passes through the turbo-expander. A turbo-compressor is operable to compress the flow of exhaust gas after the exhaust gas passes through the turbo-expander. An open cycle absorption chiller system includes an absorber section operable to receive the flow of exhaust gas from the turbo-expander and to mix the flow of exhaust gas with a first refrigerant solution within the absorber section. The first refrigerant solution is operable to absorb water from the exhaust gas as the exhaust gas passes through the first refrigerant solution. The absorber section is operable to route the flow of exhaust gas to the turbo-compressor after the flow of exhaust gas has passed through the first refrigerant solution.

A system comprises a generator and an engine coupled thereto. The engine is configured to provide mechanical power to the generator. A controller is coupled to the engine and the generator and is configured to compare an engine operating parameter value to a load demand value indicative of a load exerted by the generator on the engine. The controller determines that the engine operating parameter value fails to match the load demand value. The controller determines an engine operating parameter threshold value at which the engine operating parameter value failed to match the load demand value, and sets the engine operating parameter threshold value as a maximum allowable engine operating parameter value for the engine.

The invention relates to an auxiliary engine system (AES) for heating an electric car comprising a heating system and a rechargeable power source powering an electric motor. The AES comprises an internal combustion engine (ICE) producing heat to heat the electric car. The AES can heat people transported in the electric car and/or the rechargeable power source. The ICE can be coupled with an electric energy generator. The ICE can be air and/or liquid cooled which systems can heat the electric car. The ICE can be fueled by defined types of fuel. The ICE can be a two-stroke engine, a four-stroke engine, a turbine. The rechargeable power source can be coupled with a defined electrocomponent. The AES can be provided in a modular system. A heating method for an electric car is proposed.

A high density mobile power unit may include an elongated unibody frame having a frame cavity, a front end, a rear end, an elongated roof panel, a front panel, a rear panel, an elongated floor assembly having an upper side and a lower side, an elongated first side panel, and an elongated second side panel. An enclosure may be formed by the elongated roof panel, the front panel, the rear panel, the elongated floor assembly, the elongated first side panel, and the elongated second side panel. An under carriage structural lattice arrangement may be coupled to the lower side of the floor assembly from the midpoint and extending towards the front end. The under carriage structural lattice arrangement may include a first elongated lattice and a second elongated lattice, and the first elongated lattice and second elongated lattice may be substantially parallel to each other.

The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units.