Robert Boschgmbh

Manfred Ackermann

Peter Ahner

Gerhard Koelle

Siegfried E Schustek

Udo Sieber

Ferdinand Grob

Harald Tschentscher

Martin Eisenhardt

Ngoc-Thach Nguyen

Martin Trunk

Klaus Rechberger

Jochen Kuehner

Wolfgang Haas

Wolfgang Seils

Beqir Pushkolli

Andreas Frank

Juergen Glauning

Manfred Stahl

Robert Schenk

Siegbert Wessels

Klaus Harms

Torsten Mangold

Quang-Ngoc Tran

Andreas Bisanz

Simon-Florian Czerny

Gerd Kirsten

Richard Deptner

A method for shutting down an electric machine having a pulse-controlled inverter in the event of a malfunction. Undesirable side effects during shut-down of the electric machine may be minimized and the regular machine operation may be maximized when the electric machine is first switched to a disconnect mode in which all switches of the pulse-controlled inverter are open and subsequently is switched to a short-circuit mode in which the switches connected to the high potential are open and the switches connected to the low potential are closed.

Method for shutting down an electric machine in the event of a malfunction

A method of operating a cooling and heating circuit of a motor vehicle driven by an internal combustion engine includes providing a first cooling medium path through a bypass conduit, a second cooling medium path through a main cooler of the internal combustion engine, a third cooling medium path through a heating heat exchanger, subdividing the cooling medium paths by an electrically actuated valves and forming cooling medium flows by an electrically driven pump, controlling both the valves and the pump by an electronic control unit in dependence on operational and environmental parameters as well as nominal values, reversing a feeding direction of the electrically operated pump in a first operational phase of the internal combustion engine at low temperatures of the internal combustion engine and turned on first cooling medium path, and feeding the cooling medium by the pump in a lower region of the internal combustion engine.

Method of operating a cooling-and heating circuit of a motor vehicle, and a cooling-and heating circuit for a motor vehicle

A method for operating an internal combustion engine () installed in a motor vehicle having controlled intake and exhaust valves and that is coupled in fixed fashion with an electrical machine () charging an electrical energy accumulator, in particular a battery (), wherein, in order to enable the electrical machine to perform recuperation on overrun or during braking operation of the internal combustion engine (), the drag power or braking power of the internal combustion engine is regulated via intervention in the valve actuation process so that a braking or deceleration behavior of the motor vehicle is obtained that is familiar to the driver of the motor vehicle, wherein the valve actuation process and a regulation of the generator and motor operation of the electrical machine () are carried out as a function of the state of charge, preferably of at least four levels of the state of charge, of the energy accumulator (), and wherein the valve actuation process and the regulation of the electrical machine () are coupled with a braking management system of the motor vehicle.

Method for operating an internal combustion engine

A drive system for motor vehicles, in particular having an internal combustion engine () as a main drive, a driving clutch (), a transmission () and at least one drive axle () in the main drive train (), furthermore having a secondary drive train () and having secondary assemblies () which can be disposed in the secondary drive train (), the secondary drive train () being capable of being coupled to the main drive train, and having an electric machine operating as a starter generator (), characterized in that the secondary drive train () has its own secondary assembly drive () which can be coupled to the starter generator (), and that the secondary assembly drive () and the starter generator () can be coupled to the driving axle () of the motor vehicle either individually or jointly, with or without the main drive (), to drive the motor vehicle.

Drive system for motor vehicles

The invention relates to a drive train for a motor vehicle, having an internal combustion engine ( ), having an electric machine ( ), which upon starting of the engine ( ) generates a torque, and having a clutch ( ), which is disposed between the engine ( ) and a gear train ( ) by way of which a torque generated by the engine ( ) can be transmitted to at least one vehicle drive wheel. A mechanism ( ) is provided, which upon starting of the engine can actuate the clutch ( ) in such a way that a first part of the torque generated upon starting of the engine by the electric machine ( ) is transmitted to the at least one vehicle drive wheel, and a second part of the torque generated by the electric machine and sufficient for starting the engine is transmitted to the engine.

Drivetrain for a motor vehicle

A method of starting a multi-cylinder, direct-injection, internal combustion engine of a motor vehicle in particular without using a starter motor is described. The position of a piston in a cylinder of the internal combustion engine is determined, and fuel is injected into a combustion chamber of the cylinder whose piston is in a working phase, and the fuel is ignited immediately thereafter, thus triggering the starting operation. To improve the processing of the mixture during the starting operation, as the starting operation continues, immediately after ignition of the fuel in the cylinder which is in the working phase, fuel is injected into a combustion chamber of another cylinder whose piston is in an intake phase, and the injected fuel is ignited while still in the intake phase.

Method of starting a multi-cylinder internal combustion engine without using a starter motor

A method for optimizing the starting torque and for reducing the electrical power usage of a starter-generator of an internal combustion engine. The starter-generator is configured as an electrical machine, which is operated using an inverter or an indirect a.c. converter the electrical power P being made available by a vehicle battery. Before the imaginary turning point ( ) on the torque curve ( ) of the starter-generator is reached, the phase current of the electrical machine is limited. The electrical machine is controlled from the point at which a limiting point ( ) is reached along the electrical limiting power curve ( ) (P&equals;const), such that the electrical power P corresponds to that at the stationary operating point ( ) of the electrical machine.

Method for controlling the starting torque and starting power of an internal combustion engine

The invention relates to an electric starter for an internal combustion engine, having a thermal monitoring protector ( ) for turning the starter ( ) off when its limit operating temperature is reached. The starter is characterized by a device ( ) for ascertaining a virtual operating temperature (T ); the device ( ) ascertains the virtual operating temperature (T ) as a function of at least one operating parameter that affects the operating temperature of the starter ( ).

Electric starter device for an internal combustion engine

The invention relates to a pulse starting method for an internal combustion engine in which, during a wind-up phase, a flywheel mass is accelerated in a rotary driven fashion and then during a coupling phase, the rotating flywheel mass is coupled to a rotatably supported shaft of the engine, preferably the crankshaft, in order transmit torque, which is distinguished by the fact that during the wind-up phase ( ) and/or the coupling phase ( ), the rotational speed progression of the flywheel mass ( ) is evaluated, that based on this evaluation, a deduction is made as to whether a successful start of the engine ( ) is possible, and that if a successful start is not expected, the shaft ( ) is used to bring the engine ( ) into an operating position that is favorable for a subsequent second starting attempt.

Pulse start method and pulse start device for an internal combustion engine

Starter device for an internal combustion engine

In a drive train assembly for a motor vehicle, which includes successively arranged an internal combustion engine, a starter clutch, an electrical machine a drive clutch, and an automatic transmission, preferably an automated manual transmission, a common double clutch positioner is assigned to the two clutches, which enables a selective setting of the applicable status (open or closed) of the clutches by assumption of a corresponding switching position.

Drive train assembly for a motor vehicle, and method for controlling the operation thereof

The invention is directed to a method for turning off the starter of an internal combustion engine, wherein a starter motor which can be engaged with the internal combustion engine for cranking is disengaged and switched off when the internal combustion engine runs by itself, and the time at which the starter is switched off is determined from a curve of a starter current of the starter motor. It is provided that a signal proportional to the starter current (I ) is evaluated for determining the time (t ) for switching off the starter, wherein there is an evaluation of a characteristic line with a signal which is proportional to the starter current, which characteristic line is dependent on an operating state of the internal combustion engine.

Method for the starter cut-out of an internal combustion engine

The invention relates to a starting/driving unit for an internal combustion engine (VM) of a motor vehicle with at least two starting methods, which has a clutch (K) between the crankshaft (KW), the engine (VM), and the vehicle transmission (FG) as well as an electric machine which is connected to the engine (VM) by way of the clutch (K). With the electric machine, the two starting methods can be executed in an optimal fashion solely by virtue of the fact that through rotation of the crankshaft by means of the electric machine, each starting method is preceded by a start clearing phase in which the starting conditions are detected when the clutch is engaged, a decision is made as to the subsequent operating phases (direct start phase, positioning phase, preinjection phase, impulse start phase) and their starting parameters are determined.

Starting and driving unit for an internal combustion engine of a motor vehicle

The invention relates to a drive assembly of a motor vehicle, having a internal combustion engine and an electrical machine coupled or capable of being coupled to a crankshaft of the engine, wherein the electrical machine can be switched to motor and generator modes, and having an electronic control unit for controlling direct injection and ignition of the engine. It is provided that at the start of the engine (,) the crankshaft (,) can be put in a predeterminable starting position via the electrical machine (,) switched for motor operation, and upon attaining the starting position of the crankshaft (,), the ignition of the fuel injected into a starting cylinder (,) is effected, and via the electrical machine (,), a torque can be exerted on the crankshaft (,) during the entire starting operation.

Growing community of inventors

Oppenweiler, Germany

Manfred Ackermann